Journal articles on the topic 'Electric motors'
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1
Dutta, Rukmi. "Maximising energy efficiency with electric motors." Open Access Government 39, no. 1 (July 10, 2023): 554–55. http://dx.doi.org/10.56367/oag-039-10891.
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Maximising energy efficiency with electric motors Rukmi Dutta from the University of New South Wales discusses the mechanisms and efficiency potential of electric motor systems, looking at how electric motors work, efficiency and losses and improving overall system efficiency for electric motors. Increased industrial activities in developing economies like India, China, and many others will push the use of motors even further. Electrical motors are the powerhouse of the industrial world, she explains, discussing efficiently converting electrical energy into mechanical power. Many critical sectors use electrical motors, including industrial, commercial, residential, agricultural and transport. The worldwide growth of electrical motor-driven systems is predicted to double by 2040. Overall, UNSW Sydney’s Electrical Machines and Drive Systems research team is at the forefront and contributes to developing novel, highly efficient motors and drives suitable for many applications.
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Siregar, Leonardus, Rudianto Silaen, and Jubel Lasro Hutabarat. "Pengaruh Perubahan Beban Terhadap Putaran dan Daya Masuk Motor Induksi Tiga Fasa (Aplikasi Pada Laboratorium Konversi Energi Listrik FT-UHN)." Jurnal ELPOTECS 4, no. 1 (March 30, 2021): 1–15. http://dx.doi.org/10.51622/elpotecs.v4i1.446.
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An electric motor is an electro-magnetic device that converts electrical energy into mechanical energy. This mechanical energy is used to, for example, rotate a pump impeller, fan or blower, drive a compressor, lift materials, etc. Electric motors are also used at home (mixers, electric drills, wind fans) and in industry. Electric motors are sometimes called the "workhorse" of industry because it is estimated that they use about 70% of the industry's total electrical load.
And at this time the power from the power source, namely PLN (State Electricity Company) often changes in voltage. Therefore, it is necessary to know by calculating the rotation and input power which is influenced by changes in the load of an induction motor as an illustration of induction motors in society which generally use single-phase induction motors. In this article, a 4 HP cage rotor 3-phase induction motor with a voltage of 380/220 volts is used in the electrical energy conversion laboratory of FT-UHN.
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Sitanggang, Mahiras, and Leonardus Siregar. "Pengaruh Perubahan Beban Terhadap Putaran dan Daya Masuk Motor Induksi Tiga Fasa (Aplikasi Pada Laboratorium Konversi Energi Listrik FT-UHN)." Jurnal ELPOTECS 4, no. 1 (March 30, 2021): 32–37. http://dx.doi.org/10.51622/elpotecs.v4i1.449.
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An electric motor is an electro-magnetic device that converts electrical energy into mechanical energy. This mechanical energy is used to, for example, rotate a pump impeller, fan or blower, drive a compressor, lift materials, etc. Electric motors are also used at home (mixers, electric drills, wind fans) and in industry. Electric motors are sometimes called the "workhorse" of industry because it is estimated that they use about 70% of the industry's total electrical load.
And at this time the power from the power source, namely PLN (State Electricity Company) often changes in voltage. Therefore, it is necessary to know by calculating the rotation and input power which is influenced by changes in the load of an induction motor as an illustration of induction motors in society which generally use single-phase induction motors. In this article, a 4 HP cage rotor 3-phase induction motor with a voltage of 380/220 volts is used in the electrical energy conversion laboratory of FT-UHN.
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Alibeik, Maryam, and Euzeli C. dos dos Santos. "High-Torque Electric Machines: State of The Art and Comparison." Machines 10, no. 8 (July 30, 2022): 636. http://dx.doi.org/10.3390/machines10080636.
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The state of the art of high-torque electric motors has been reviewed in this paper. This paper presents a literature review of high-torque density electric machines based on their airgap classifications, which brings a unique consideration to new design ideas to increase torque density. Electric machines are classified into three main groups based on their airgap configuration, i.e., (1) machines with a constant airgap, (2) machines with a variable airgap, and (3) machines with an eccentric airgap. This paper also presents the modeling of a high-torque airgap-less electric motor based on the concept of eccentric airgap. The torque density of this motor has been compared to motors available in the literature review. Among electrical motors with no permanent-magnet, airgap-less electric motors take the lead in terms of torque density, which is almost five times greater than the next motor, “in-wheel for electric vehicle”.
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Nogal, Łukasz, Andrzej Magdziarz, Désiré Dauphin Rasolomampionona, Piotr Łukaszewski, Łukasz Sapuła, and Radosław Szreder. "The Laboratory Analysis of the Thermal Processes Occurring in Low-Voltage Asynchronous Electric Motors." Energies 14, no. 8 (April 8, 2021): 2056. http://dx.doi.org/10.3390/en14082056.
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The exact nature of thermal processes occurring in an electric motor is often unknown. Thus, the estimation of temperature rise using mathematical models and computational experiments is becoming increasingly important. Thermal analysis is the key design aspect, which has become significant in the design process for electric motors. The thermal analysis of electric motors can be helpful in developing effective thermal monitoring methods. This analysis is crucial for a better understanding of the overall performance and failure prevention for these electrical motors. In this paper, laboratory investigations of thermal processes in low-voltage asynchronous motors are described. The analysis of the results leads to the conclusion that the classic single-exponential models do not match the dynamically changing thermal processes in electric motors especially in the case of intermittent motor operation.
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Kurayev, A. A., and V. V. Matveyenka. "Unimodal electric motor-generator." Doklady BGUIR 18, no. 7 (November 25, 2020): 96–99. http://dx.doi.org/10.35596/1729-7648-2020-18-7-96-99.
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The commissioning of nuclear power plants in Belarus sets out wide tasking for the efficient usage of electrical energy in various electrical systems, instruments and devices. Specifically, it concerns the stationary and special-purpose electric motors. At present, they use bipolar motors with a collector – the switch of the motor armature windings during its rotation. However, there is a completely different type of motors that does not require a collector – the unipolar electric motor-generator. Some of its properties allow it to be used where the commutator motor is unsuitable, for example, in explosive and fire hazardous environments (sparking on the collector is unacceptable), in precision devices where extreme smoothness and vibration lack are required, etc. Physico-mathematical foundations of the unipolar motor-generator (moving media electrodynamics, Lorentz force, unipolar induction, magnetohydrodynamics) are described in a number of monographs and textbooks, for example, in [1–4]. The purpose of this article is to pay attention to the technical feasibility of the unipolar motor-generator in a design with separated conductors in the rotor drum.
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Feri Febrian Syah and Endi Permata. "PERBAIKAN DAN PEMELIHARAAN MOTOR LISTRIK PENGGERAK WATER JET PUMP DI AREA WASTE HEAT RECOVERY SYSTEM PT CEMINDO GEMILANG." JURAL RISET RUMPUN ILMU TEKNIK 1, no. 1 (April 30, 2022): 78–87. http://dx.doi.org/10.55606/jurritek.v1i1.299.
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Electricity is one of the vital needs that is indispensable for all humans and other places, one of which is PT. Cemindo Gemilang, engaged in the cement-producing industry, requires a huge electricity capacity. To reduce or reduce the cost of electrical energy, a power plant unit and a WHRS (waste heats recovery system) were made to supply electrical energy to the cement plant area. PT. Cemindo Gemilang and the Power Plant rely heavily on electric motors, almost all of which operate using electric motors. The electric motor is a single-phase or three-phase type with a voltage of 11 KV, 6.6 KV or 400 volts. When all generating units operate, all electric motors that play an essential role will continue to be active so that damage is often caused by operation and service life therefore in the power plant department, and there is an electrical and mechanical maintenance division to maintain the continuity of the power plant operational system. This study's aim 1). Explain about electric motors, 2). Explain the definition of the water jet pump, 3). Explain how the water jet pump works 4). Explain the components used in electric motors and their repair and maintenance.
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Sinan Cabuk, Ali. "EXPERIMENTAL DATA ACQUISITION OF VIBRATION FORCE IN DIRECT CURRENT MOTOR FOR MINI SUMO ROBOT." Applied Researches in Technics, Technologies and Education 7, no. 1 (2019): 48–57. http://dx.doi.org/10.15547/artte.2019.01.006.
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Vibration is the oscillating or periodic movement of electric motors from its position to a certain point, which has effect on performance. The vibration of electrical motor is essential causes of machine failure. Therefore, reaction force of electric motors is the most important parameter for their working life. It is monitoring and minimize the vibration generated by the electric motor. One of the objectives of this study is to present that forced vibration analysis is compatible technique for diagnosing electromagnetic and mechanical problems in electric motors. In this study aims at vibration analysis on Direct Current (DC) motor, that is the most preferred motors for robotic application. DC motor used in this study has 15 W output power, 400 min-1 shaft speed and 12 V terminal voltage, which is widely implemented in robot competition. Vibration forced was measured with accelerometer sensor on the motor. Test vibration results of the motor were checked it whether limiting value or not. In this study, vibration effect of DC motor in mini sumo robot is presented with during competition and smooth road conditions.
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Jin, Chili. "Current Status and Prospects of Electric Motor Applications for Electric Vehicles." Highlights in Science, Engineering and Technology 37 (March 18, 2023): 196–201. http://dx.doi.org/10.54097/hset.v37i.6074.
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Nowadays, with the global pursuit of zero emissions, the trend of automobile electrification is very rapid. The drive motor is the core component of electric vehicles, which has an important impact on the working life and performance of electric vehicles. Therefore, all major manufacturers are trying to find and develop better and more efficient motors. At present, the research on driving motor has become a hot issue in the field of electric vehicles, attracting many scholars to carry out a lot of research work. This paper analyzes four common driving motors in the market, discusses their structure, principle and performance, and lists their advantages and disadvantages for comparison. Then it describes the development status of various types of motors and their applications in electric vehicles, and introduces the prospects of electric vehicle motors and suggestions for improvement of switched reluctance motors.
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Lisov, Andrey A., Alexander G. Vozmilov, Nadezhda Yu Kuleva, Andrey I. Sogrin, Ramil A. Zakirov, and Rafael Yu Ilimbetov. "Selection of a traction electric motor for arctic electric transport." Modern Transportation Systems and Technologies 9, no. 2 (June 30, 2023): 44–56. http://dx.doi.org/10.17816/transsyst20239244-56.
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Aim: selection of a traction motor for electric freight transport operating in the Arctic.
Methods: To achieve this aim, the main characteristics of existing types of DC and AC electric motors were considered, as well as data on the use of one or another type of motor in modern electric vehicle.
Results: A comparative analysis of the most common motors has led to 2 main leaders - a permanent magnet synchronous motor (PMSM) and an induction motor (IM). Both types of motors are fully suitable for solving the aim. However, as it turned out later, PMSM is more often used for light vehicles, while IM in most cases is used for heavier vehicles.
Conclusion: As a result of the analysis, it was decided that for electric transport operating in the Arctic, the best option is to use an induction motor as a traction motor.
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Kashirskikh, Veniamin, Valery Zavyalov, and Irina Semykina. "On the Issue of Increasing Reliability of Electric Mining Machinery." E3S Web of Conferences 174 (2020): 03024. http://dx.doi.org/10.1051/e3sconf/202017403024.
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The paper considers conditions of mining machinery electric drives operation and analyzes the causes of insufficient reliability. To improve the reliability and efficiency of induction motors the authors propose the computer system designed for dynamic identification of electric motors to monitor their parameters and variables, which are estimated on operating equipment in real time. Operation of the system allows calculating unmeasurable quantities and is based on the mathematical model of the induction motor as well as mathematical methods of estimation and the information contained in the measured phase voltages and currents of the stator. For dynamic mode the mathematical model of the motor’s state and the measurement part were developed and certain results were obtained. Real-time information can be used for both control and management of electric motors, function testing, protection, forecasting as well as acceptance testing of electric motors in mining machinery electric drives to identify their individual data and quality control of the industrial processes in the manufacture or repair of motors.
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Gonzalez, Patxi, Garikoitz Buigues, and Angel Javier Mazon. "Noise in Electric Motors: A Comprehensive Review." Energies 16, no. 14 (July 11, 2023): 5311. http://dx.doi.org/10.3390/en16145311.
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Electric machines are important devices that convert electrical energy into mechanical energy and are extensively used in a wide range of applications. Recent years have seen an increase in applications where electric motors are used. The frequent use of electric motors in noise-sensitive environments increases the requirements placed on electric motors intended for these applications, especially when compared to electric motors commonly used in industrial applications. This paper provides a comprehensive review of electric motor noise. Firstly, a brief introduction to noise is given. Then, the sources of electromagnetic noise and vibration in electric machines, including mechanical, aerodynamic and electromagnetic factors, are presented. Different methods such as analytical, numerical and semi-analytical for calculating electromagnetic force, natural frequencies and noise are also analyzed. Various methods for noise reduction are presented, including skewing, stator and rotor notching and slot opening width. Finally, noise measurement standards and procedures are described.
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Kamar, Syamsul, Meiyanne Lestari, Respatya Teguh Soewono, Sofwan Hidayat, Hilda Luthfiyah, Okghi Adam Qowiy, Fauzi Dwi Setiawan, and Mulyadi Sinung Harjono. "Performance analysis of three-phase induction motor for railway propulsion system." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 3 (September 1, 2023): 1433. http://dx.doi.org/10.11591/ijpeds.v14.i3.pp1433-1441.
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A three-phase induction motor absorbs the most electric power among other electrical loads. Therefore, three-phase induction motors are the primary electric motors used in industrial applications thanks to their simple construction and easy operation, as well as low cost and low maintenance costs. Efficiency is a critical parameter that characterizes an induction motor as a traction motor. The traction motor is defined as the engine's effectiveness in converting electrical power at its input into mechanical energy by rotating torque on its axis. One way to analyze the efficiency is to use test data obtained from laboratory tests in case-loaded and no-load tests. Calculations using several formulas on the efficiency of an induction motor as a traction motor produce the same result, namely the efficiency of 98.6% by applying variable frequency drive (VFD). The result of laboratory tests and their analysis can be used as a reference for designing three-phase induction motors for railway traction motors, especially traction motors for high-speed trains<em>.</em>
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Herasymenko, V., V. Pliuhin, and М. Shpika. "ANALYSIS OF CHARACTERISTICS OF ELECTRIC BRAKING SYSTEMS." Municipal economy of cities 1, no. 154 (April 3, 2020): 2–7. http://dx.doi.org/10.33042/2522-1809-2020-1-154-2-7.
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The technical and energy characteristics of the most commonly used electrical braking systems are analyzed, their disadvantages are indicated. An electrical braking system with variable structure and DC motors with the best technical and energy performance is proposed. In the braking mode, the motors operate in series excitation, and the current in the excitation windings is controlled by a DC-DC converter. Keywords: electric motor, excitation windings, electrical braking, energy performance, high frequency converter.
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Edwards, C. "More motor, less power [electric motors]." Engineering & Technology 7, no. 7 (2012): 86. http://dx.doi.org/10.1049/et.2012.0717.
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Badarudin, R., D. Hariyanto, M. Ali, and S. Meunmany. "Electric Machines Virtual Laboratory: Testing of DC Motor." Journal of Physics: Conference Series 2111, no. 1 (November 1, 2021): 012041. http://dx.doi.org/10.1088/1742-6596/2111/1/012041.
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Abstract This article describes the realization of testing the characteristics of a DC motor on Simulink as a virtual laboratory. Testing of DC motors based on real conditions in a physical laboratory by combining two DC machines coupled to shafts including DC motors and DC generators. The types of DC motors tested include separately excited DC motors, shunt DC motors, and series DC motors. The implementation of the Simulink model adopts the wiring diagram in the real test. The test procedure is also adopted on the real test procedure. The data from the test results are made in DC motor characteristics graph. Virtual laboratory using Simulink can be used to realize DC motor testing, including test procedures, running no-load DC motors, increasing the load of DC motors with infinitely simulation features on Simulink. The results of the study show the characteristics of the experimental data for all types of DC motors tested according to the theory.
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Suechoey, Boonlert, Somsak Siriporananon, Pana Chupun, Churirat Boonkhun, and Chai Chompooinwai. "Performance Analysis and Fault Classification in a Large Electric Motor Using Vibration Assessment Technique." International Journal of Intelligent Engineering and Systems 14, no. 1 (February 28, 2021): 124–33. http://dx.doi.org/10.22266/ijies2021.0228.13.
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This research paper presents an analysis of electric motors performance by the assessment of vibration characteristics caused by bearing faults, housing bearing looseness and rotor unbalance. In this study, an analysis of fault that occurred in electric motor has followed ISO 10816-3 Standard. Bring the used electric motors for testing and measuring the vibration of the electric motors by using the Spectrum Analysis & Field Balancing Analyzer model ADASH A440-VA4 Pro. The vibration results of 22kW, 55kW and 75kW motor imply the malfunction of bearing faults, housing bearing looseness, and rotor unbalance. The results obtained from the analysis will be used as references and guidelines for predictions of faults in the electric motors, including maintenance scheduling of electric motors.
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Abakumov, Alexander M., and Pavel K. Kuznetsov. "Combined control of fans of gas cooling units electric drives." Vestnik of Samara State Technical University. Technical Sciences Series 29, no. 3 (October 13, 2021): 67–82. http://dx.doi.org/10.14498/tech.2021.3.4.
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The problem of the temperature control at the outlet of gas cooling units of compressor stations of main gas pipelines is discussed. To solve the problemt, a discrete or frequency control of electric motors of fans of gas air cooling devices is used. The problems of electromagnetic compatibility that arise in typical power supply systems of gas cooling installations when connecting electric motors of fans through frequency converters are noted. A combined fan motor control system is considered, in which the electric motors are divided into two groups. The electric motors of the first group are connected to the network directly, the second through frequency converters. By reducing the number of electric motors connected to the network through frequency converters, the negative impact of frequency-controlled drives on the quality of electricity is reduced and the costs of modernization projects are reduced in comparison with the option of the variant using a frequency converter for each electric motor. The energy characteristics of the combined control system are analyzed. The relations that establish the relationship between the temperature difference at the cooling unit and the power of the fan motors for various control methods are obtained. The optimal control algorithm according to the criterion of maximum power saving is proposed, which provides for the interconnected control of the number of discrete-controlled motors and the speed of frequency-controlled drives. The variants of the implementation of the optimal control algorithm are discussed. Analytical expressions for power saving on the fan motor shaft in a combined system compared with a discrete one and a method for estimating energy savings are considered. The obtained results are recommended to be used to assess the technical and economic efficiency of projects for the modernization of electrical complexes of gas cooling units.
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Romanova, V. V., S. V. Khromov, A. G. Batukhtin, and K. V. Suslov. "Analysis of the degree of influence of supply voltage asymmetry on the operational reliability of low-voltage asynchronous electric motors." Power engineering: research, equipment, technology 24, no. 4 (August 17, 2022): 131–41. http://dx.doi.org/10.30724/1998-9903-2022-24-4-131-141.
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THE PURPOSE. The relevance of research is that the comprehensive substantiation of issues aimed at ensuring the effective functioning of the electrical complex with the presence of an electric motor load in conditions of low-quality supply voltage. The aim of the work is to study the effect of the asymmetry of the supply voltage on the service life of an asynchronous motor with a short-circuited rotor. The main attention is paid to the dynamics of changes in the service life of low-voltage asynchronous electric motors of various series, depending on the level of voltage asymmetry. Asynchronous electric motors of the classic series (4A, AI) and the upgraded (5A, AI’) are identified as the object of research. As is known, the efficient and reliable operation of electric motors is characterized by the service life of the insulation of the windings. A qualitative assessment of the operational reliability of AM is determined by the accuracy of forecasting the real life of their service. That is why, it becomes obvious, the task of an adequate assessment of the operational reliability of low-voltage asynchronous electric motors operating under conditions of low-quality supply voltage directly depends on the complex of studies of such an external influencing factor as the asymmetry of the supply voltage. METHODS. The realization of the research objectives was carried out using the software package "SimPowerSystems" of the interactive programming environment Matlab/Simulink. RESULTS. The research was carried out on asynchronous motors with a short-circuited rotor: classic series (4A132S4, AIR160S8), upgraded series (5A132M6, AIR132S4) with PH = 7,5 kW, rated speed n = 1500 rpm. Modeling of the physical processes of the studied electric motors was carried out by changing the voltage asymmetry coefficient in the reverse sequence (K2U) from 0 to 5% in increments of 1%. Based on the obtained simulation results, diagrams of the change in the service life of AM from the magnitude of the influencing factor are constructed. The studies performed using computer modeling based on the "SimPowerSystems" software package of the Matlab/Simulink system made it possible to predict changes in the service life of AM, estimate the limits of permissible values of the voltage asymmetry coefficient in the reverse sequence, compare the studied electric motors by the level of resistance to an external influencing factor. CONCLUSION. A comprehensive solution to issues related to improving the operational reliability of low-voltage asynchronous electric motors is one of the priority areas, mainly aimed at ensuring the effective functioning of the electrical complex with an electric motor load. In the course of the study, a detailed assessment and analysis of the degree of influence of the asymmetry of the supply voltage on the operational reliability of low-voltage asynchronous electric motors was carried out. The results of the study were discussed, recommendations for the use of asynchronous electric motors in the presence of asymmetry of the supply voltage were formulated.
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Gilmanov, Eduard. "METHODS AND MODERN DEVICES FOR SOFT START OF HIGH VOLTAGE MOTORS." Electrical and data processing facilities and systems 19, no. 1 (2023): 93–105. http://dx.doi.org/10.17122/1999-5458-2023-19-1-93-105.
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The relevance In today's industry, a lot of high-voltage electric drives are used. Highvoltage electric motors are used in oil and gas production, transportation, chemical and oil refineries, energy and water supply. However, during direct start of high-voltage motors, shock mechanical and electrical loads occur on the motors themselves, connected technological mechanisms and the electrical network. In pipelines during direct starts of pump drives, hydraulic pressure waves can occur, leading to the destruction of pipes and their joints. The motor winding during one start-up can heat up to critical temperatures, which causes aging of the insulation, as well as the impossibility of restarting for several hours. Therefore, the introduction of devices for scheduled start-up of high-voltage motors allows not only to reduce mechanical and electrical loads, but also to extend the life of motors and equipment. Aim of research It was necessary to consider the existing methods of starting highvoltage synchronous and asynchronous motors, as well as to analyze the soft starters manufactured by the industry and their characteristics. Research methods The provisions of the theory of electrical circuits, the theory of electrical machines and the theory of electric drive were used. Results In the course of the work, the existing methods for starting high-voltage motors were considered, their advantages and disadvantages, and the complexity of implementation were analyzed. The modern soft starters produced by the industry and their characteristics are analyzed.
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Fazdi, Mohamad Farid, and Po-Wen Hsueh. "Parameters Identification of a Permanent Magnet DC Motor: A Review." Electronics 12, no. 12 (June 6, 2023): 2559. http://dx.doi.org/10.3390/electronics12122559.
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Since permanent magnet direct current (DC) motors are mainly used in various industrial automation applications, the demand for electric motors is increasing rapidly. However, in the mass production of electric motors, often, only random inspections are used to check the specifications and performance of electric motors. For manufacturing or engineering application staff to have a more thorough understanding of the characteristics of the motor, it is necessary to conduct a full or quick inspection during the production process to ensure the quality of the electric motor. Based on this, this literature review reveals several methods and algorithms often used to estimate DC motor parameters, given the importance of knowing the parameters of the DC motor and the lack of research on estimating the parameters of the DC motor.
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Danardono, A. S., Didi Widya Utama, and Gandjar Kiswanto. "Design and Development of Simple Control System for Small Hybrid Electric Vehicle." Applied Mechanics and Materials 165 (April 2012): 73–77. http://dx.doi.org/10.4028/www.scientific.net/amm.165.73.
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This research describes the scope of design and test a traction controller to combine a 6.54 kW gasoline engine power and 2x48VDC/0.5 kW electrical brushless motors in a serial-parallel type of small hybrid electric vehicle. A central control system was designed to operate the engine which is equipped with continuous variable transmission and electric motor on rear wheel side in order to select the optimal torque in normal driving condition. The battery charging system draws its energy from the engine using two alternators: 80 Watt built-in alternator and 300 Watt additional alternator which is driven using a power take-off unit. To increase the electric charging capacity, the electric motor is able to operate as a generator during acceleration or deceleration condition (regenerative system). The static preliminary testing shows that the electric motor can generate about 38% of nominal motors power at 730 rpm of wheel rotation.
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Miles, A. R. "Spherical electric motors." IEEE Potentials 9, no. 3 (October 1990): 47–48. http://dx.doi.org/10.1109/45.101402.
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Kharlamov, Viktor, Pavel Shkodun, and Andrey Ognevsky. "Effect of transient processes on the switching stability of dc machines." MATEC Web of Conferences 239 (2018): 01036. http://dx.doi.org/10.1051/matecconf/201823901036.
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Effective use of fuel and energy resources is one of the main tasks in modern industry and transport. The main directions of increasing the energy efficiency of the electric rolling stock of railways are considered in the paper. For the electric rolling stock of railways, a significant proportion of electric power consumption falls on traction needs. The consumption of electrical energy and its recovery directly depends on the proper operation and fine-tuning of the magnetic system and switching of traction electric motors of the rolling stock. The methods of testing traction electric motors currently used in railway transport do not fully correspond to their operating modes during operation. For more reliable control of their condition, a methodology for estimating the nature of the operation of traction electric motors in conditions close to real ones was proposed. Studies of the influence of transient processes on the quality of switching of traction electric motors taking into account operating conditions are carried out. Based on the results of the study, the analysis of the data obtained is carried out, and a criterion for estimating the switching stability of traction electric motors in transient operation modes is proposed. The proposed criterion allows carrying out quality control of the tuning of the magnetic system and switching of the traction electric motor, and also estimating the nature of its operation in various modes, taking into account the operating conditions.
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Nagy, Andras. "Electric aircraft - present and future." Production Engineering Archives 23, no. 23 (June 1, 2019): 36–40. http://dx.doi.org/10.30657/pea.2019.23.06.
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Abstract In this paper, an outlook about the present of electrical aviation is given. The relatively small energy density of current battery technologies is adequate to build usable electric car, but not suitable for electric aircraft. Because of the very limited amount of energy available on-board, a couple of percent in efficiency can give significant increase in range and flight time, hence the development of more efficient propulsion system and E-motor is as important as the development of battery technologies. Current research results at the University of Dunaujvaros show, that building E-motors from amorphous materials is possible, and can easily increase the efficiency of high speed E-motors.
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Momen, Faizul, Khwaja M. Rahman, Yochan Son, and Peter Savagian. "Electric Motor Design of General Motors’ Chevrolet Bolt Electric Vehicle." SAE International Journal of Alternative Powertrains 5, no. 2 (April 5, 2016): 286–93. http://dx.doi.org/10.4271/2016-01-1228.
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Mayr, Andreas, Michael Weigelt, Michael Masuch, Martin Adrion, Aljoscha Bauer, Katrin Wirsinger, and Jörg Franke. "Sustainability Aspects of Current Market Developments, Different Product Types and Innovative Manufacturing Processes of Electric Motors." Applied Mechanics and Materials 882 (July 2018): 64–74. http://dx.doi.org/10.4028/www.scientific.net/amm.882.64.
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There are numerous levers and constraints affecting the sustainability of electric motors. While previous work mostly focuses on individual energy and resource efficiency potentials within single phases of the motor’s lifecycle, this paper summarizes sustainability aspects from three different perspectives, namely from the market, product and process view. The first part of this paper analyzes the electric motor market to emphasize the significance of this industry and to outline the importance of state-regulated efficiency classes. The second part provides an overview of the range of electric motor types and their sustainability characteristics. The third part contains an analysis of manufacturing processes in terms of energy and resource efficiency by pointing out appropriate key figures and optimization approaches. In doing so, the connection of the three perspectives market, product and processes offers a holistic view on sustainability aspects of electric motors.
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Khamudkhanova, Nargiza, Mokhira Idriskhodjaeva, and Kholjan Kholbutayeva. "Construction principle of automatic control system adjustable multi-engine drive water lift pump unit." E3S Web of Conferences 384 (2023): 01057. http://dx.doi.org/10.1051/e3sconf/202338401057.
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The article discusses the issues of the principle of constructing an automatic control system for a multi-motor controlled electric drive with an electrical connection along the rotor chain of asyn-chronous electric motors with phase rotors and a common inverter by a driven network to control the technological process of water supply of pumping units as part of a water-lifting pumping unit. The expediency of constructing a system for automatic control of the frequency of rotation of the drive motors of a pumping unit in the form of a digital electric drive, implemented through a subordinate control system, is disclosed.
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Molnár, Denis, Miroslav Blatnický, and Ján Dižo. "Design of the Power of an Electric Lifting Motor for a Single Girder Bridge Crane with a 500 Kg Load Capacity." Transport technic and technology 17, no. 2 (December 1, 2021): 23–29. http://dx.doi.org/10.2478/ttt-2021-0010.
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Abstract An electric hoist could be considered as the most important component of an electric overhead crane. Electric hoists are material handling equipment used for lifting, lowering, and transporting materials and products. They are powered by an electric motor and have a controller to adjust the lifting parameters. Three-phase induction motors are most often used as electric lifting motors for bridge cranes. This paper concerns the design of the power of the electric lifting motor for an electric hoist of the single girder bridge crane with the 500 kg load capacity. It represents the design of the electric lifting motor according to a commonly used scheme for the design of electric motors, from the power at a uniform load to the relative load of the motor. Based on the input data, the necessary motor parameters are calculated using Microsoft Excel. The main parameter is the static power of the motor, the calculated value of which is 0.823 kW. Based on the value of this power, a three-phase induction motor 1.1 kW, MS90-4 is selected. This electric lifting motor is suitable for the above-mentioned bridge crane, as it meets the condition of torque overload.
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Fauzi, Ahmat, W. T. Handoyo, A. R. Hakim, and F. Hidayat. "Performance and Energy Consumption of Paddle Wheel Aerator Driven by Brushless DC Motor and AC Motor: A Preliminary Study." IOP Conference Series: Earth and Environmental Science 934, no. 1 (November 1, 2021): 012010. http://dx.doi.org/10.1088/1755-1315/934/1/012010.
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Abstract Energy demand for paddle wheel aerator in a shrimp pond is high and brings to second highest cost of operational behind feed supply. Most of wheel aerators are driven by electric motors than diesel engines as their easy operations. The electric motors need high electrical energy to drive wheel aerators along day and night. The common type of motor used is Alternating Current (AC) or induction motor, however Brushless Direct Current (BLDC) motor has potential electrical energy saving which need to be explored. This study objectives to find out performance of BLDC and AC motor as paddle wheel aerator driver. The motor’s performances were compared in term of operation of paddle wheel at various static loads. Both motor also challenged by On/Off running every 5 minutes, the treatment goal was to determine their reliability. Parameters observed included consumption of power, wheel rotary, torque, and efficiency, motor temperature as well. Results showed energy consumption of BLDC motor 51% lower than AC motor, and BLDC motor attained 89.99% of maximum efficiency while AC motor efficiency had 73.16%, however rotary wheel and torque both of them were similar. The On/Off treatment caused rising temperature of AC motor but did not affect the temperature of BLDC motor. Therefore, applied BLDC motor as paddle wheel aerator driver could be alternative way to reduce energy consumption without reducing its performance.
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Tamai, Mitsuhiro. "Marine Electric Motors and Motor-related Equipments." Marine Engineering 52, no. 1 (2017): 65–70. http://dx.doi.org/10.5988/jime.52.65.
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Маiorov, A. A., and A. R. Safin. "The possibility of using permanent magnets without rare earth elements in electric motors." Power engineering: research, equipment, technology 24, no. 4 (August 17, 2022): 116–30. http://dx.doi.org/10.30724/1998-9903-2022-24-4-116-130.
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THE PURPOSE. The use of rare earth permanent magnets in electric motors has become commonplace. The use of rare earth magnets in electric motors, such as neodymium (NdFeB), gives a significant increase in the characteristics of the electric motor. The prices of permanent magnet motors made of rare earth elements are highly dependent on the prices of magnets. So in 2012, prices for rare earth magnets increased sharply, which in turn led to a sharp increase in the cost of electric motors. The difficult situation in the world, as well as a possible new price hike for rare earth magnets, is worrying. Therefore, alternatives to rare earth permanent magnets should be considered. The aim of the study is to study and compare various alternatives to rare earth permanent magnets. Compare different types of electric motors. METHODS. When solving the tasks set, a comparative analysis of magnets made of various materials was carried out, which could replace neodymium magnets, which are most often used in electric motors. A comparison of different types of electric motors was also made. RESULTS. The article describes the relevance of the topic under consideration. The problems associated with the use of rare earth magnets are considered. Alternative options for rare-earth magnets, which are used in electric motors, are considered. Various types of electric motors are considered, the pros and cons of various types of electric motors are given. CONCLUSION. The article describes the reasons why it is necessary to abandon the use of rare earth magnets in electric motors (the most common neodymium magnets). The negative aspects of the use of rare earth magnets in electric motors are described. Alternative applications of rare-earth magnets in electric motors are described. This describes the possibility of restoring rare earth magnets, as well as the possibility of using various materials to create permanent magnets. After studying the problems with the use of rare earth magnets in electric motors, they came to the conclusion that it is necessary to consider various options for electric motors that would use magnets without the use of rare earth elements. Or consider different types of electric motors that do not use permanent magnets. So to replace the widely used neodymium magnets, ferrite magnets can come.
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Sakama, Sayako, Yutaka Tanaka, and Akiya Kamimura. "Characteristics of Hydraulic and Electric Servo Motors." Actuators 11, no. 1 (January 5, 2022): 11. http://dx.doi.org/10.3390/act11010011.
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Until the 1970s, hydraulic actuators were widely used in many mechanical systems; however, recently, electric motors have become mainstream by virtue of their improved performance, and hydraulic motors have largely been replaced by electric motors in many applications. Although this trend is expected to continue into the future, it is important to comprehensively evaluate which motor is most suitable when designing mechanical systems. This paper presents the results of a survey of the performance of electric and hydraulic servo motors and aims to provide quantitative data that can be used as a reference for selecting appropriate motors. We surveyed AC, AC direct, brushless DC, and brushed DC electric motors and swash plate-type axial piston, bent axis-type axial piston, crank-type radial piston, and multistroke-type radial piston hydraulic motors. Performance data were collected from catalogs and nonpublic data. We compared and evaluated the characteristics of these diverse servo motors using indexes such as torque, rotating speed, output power, power density, and power rate.
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Dirba, J., L. Lavrinovicha, N. Levin, and V. Pugachev. "Application of Synchronous Brushless Motors in Electric Hand Tools." Latvian Journal of Physics and Technical Sciences 49, no. 1 (January 1, 2012): 29–34. http://dx.doi.org/10.2478/v10047-012-0003-7.
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Application of Synchronous Brushless Motors in Electric Hand Tools In the paper, the possibilities to apply synchronous brushless motors in the electric hand tools are considered. The potential of such motors is estimated in a wide range of characteristics. In particular, estimation is made for the electric hand plane with a synchronous motor having outer rotor and excitation from permanent magnets.
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Bashirov, M., A. Nemirovskiy, A. Aluynov, O. Vyatkina, and R. Salikhova. "Destruction of electrical insulating structures of electric motors during various drying techniques." E3S Web of Conferences 220 (2020): 01066. http://dx.doi.org/10.1051/e3sconf/202022001066.
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The paper discusses the problem of drying electric motors in a humid environment. The study considers the influence of oven, current, electroosmotic, convective-electroosmotic drying methods on defect formation in electrical insulating materials of electric motors. Thermal oven drying destroys the insulation system of electric motors for an order of magnitude higher than other methods and has a lot of negative consequences. The electroosmotic and convective-electroosmotic drying processes do not have disadvantages of thermal drying methods, or these disadvantages are kept to a minimum. It is shown that electroosmotic and convective-electroosmotic drying result in a uniform distribution of moisture content in the volume of electrical insulating materials. This reduces the likelihood of dangerous stresses and subsequent cracking. Electroosmotic and convective-electroosmotic drying have little effect on defect formation processes in the insulation system of electric motors and, thus, almost do not reduce the service life of electric motors.
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Mavlonov, Jamshid, Sanjarbek Ruzimov, Andrea Tonoli, Nicola Amati, and Akmal Mukhitdinov. "Sensitivity Analysis of Electric Energy Consumption in Battery Electric Vehicles with Different Electric Motors." World Electric Vehicle Journal 14, no. 2 (January 30, 2023): 36. http://dx.doi.org/10.3390/wevj14020036.
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In the last decade, a number of research works in electrified vehicles have been devoted to the analysis of the electric consumption of battery electric vehicles and the evaluation of the main influencing factors. The literature analysis reveals that the electric motor size, efficiency, and driving condition substantially affect the electric energy stored in the vehicle battery. This paper studies the degree of sensitivity of energy consumption to electric motor size and to its efficiency map characteristics. In order to accomplish this task, three electric motors whose parameters are re-scaled to fit the maximum power torque and speed with different efficiency maps are simulated by installing them on two commercially available battery electric vehicles. This allows for isolating the influence of the efficiency map on electricity consumption. The original characteristics of the motors are then used to evaluate the influence on the electricity consumption of both the size and the efficiency characteristics. The results of the simulation revealed that the influences of the efficiency map and the electric motor size can be around 8–10% and 2–11%, respectively. When both factors are taken into account, the overall difference in electricity consumption can be around 10–21%.
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Glowacz, A. "Diagnostics of DC and Induction Motors Based on the Analysis of Acoustic Signals." Measurement Science Review 14, no. 5 (October 1, 2014): 257–62. http://dx.doi.org/10.2478/msr-2014-0035.
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Abstract In this paper, a non-invasive method of early fault diagnostics of electric motors was proposed. This method uses acoustic signals generated by electric motors. Essential features were extracted from acoustic signals of motors. A plan of study of acoustic signals of electric motors was proposed. Researches were carried out for faultless induction motor, induction motor with one faulty rotor bar, induction motor with two faulty rotor bars and flawless Direct Current, and Direct Current motor with shorted rotor coils. Researches were carried out for methods of signal processing: log area ratio coefficients, Multiple signal classification, Nearest Neighbor classifier and the Bayes classifier. A pattern creation process was carried out using 40 samples of sound. In the identification process 130 five-second test samples were used. The proposed approach will also reduce the costs of maintenance and the number of faulty motors in the industry.
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Sharke, Paul. "The Hunt for Compact Power." Mechanical Engineering 122, no. 04 (April 1, 2000): 42–45. http://dx.doi.org/10.1115/1.2000-apr-1.
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This article explains features of a ship propulsion motor with superconducting coils that hushes machinery noise and hollows out confined engine rooms. American Superconductor Corp. of Westborough, MA, announced plans to build a high-capacity manufacturing plant for its superconducting wire. This will move the company’s high temperature superconductor (HTS), wire from a developmental phase into large-scale production. IPS is exploring more than just propulsion motor technology. Engineers are evaluating the entire shipboard electrical system, from ship’s service power, to dc distribution, to power electronics—as well as the propulsion motor itself. The Navy, having decided upon electric drive for its next warship, has left the door open for superconducting motors. Superconducting motors can develop the same torque and horsepower within a motor frame that is nearly a third the size of a comparably rated conventional motor. The main factor leading to an HTS motor’s smaller size for a given horsepower output is the magnetic field strength that superconducting magnets create. Iron teeth, used to enhance magnetic flux in conventional rotors and stators, are not needed by superconducting motors.
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Nurmaganbetova, Gulim, Sultanbek Issenov, Vladimir Kaverin, and Zhanat Issenov. "Development of a virtual hardware temperature observer for frequency-controlled asynchronous electric motors." Eastern-European Journal of Enterprise Technologies 3, no. 1 (123) (June 30, 2023): 68–75. http://dx.doi.org/10.15587/1729-4061.2023.280357.
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One of the most common types of AC electric machines are asynchronous electric motors. Because of their simple and reliable design, they are used in many industries. In this paper, the object of research is an asynchronous electric motor with a short-circuited rotor. To ensure the normal operation of an asynchronous electric motor, the heating temperature of its active parts should not exceed the maximum permissible values, which are determined by the corresponding class of heat resistance of the insulation system used in the electric motor. In asynchronous electric motors, the stator winding is the most thermally vulnerable node, which is the first to fail when the temperature of the electric motor increases. Thermal protection devices protect an asynchronous electric motor from emergency operating modes accompanied by an unacceptable excess of the temperature of their windings. In order to build an indirect system of protection against overheating of the stator windings, a temperature observer has been developed using already available signals in a frequency-controlled electric drive. Simulation studies were performed in Matlab/Simulink application software packages. Simulation studies were carried out on the basis of asynchronous electric motors of the 4A series with a capacity of 30, 75 and 110 kW in the temperature range from 20 °C to 250 °C. As a result of the research, it was found that the error of indirect calculation of the temperature of electric motors, taking into account the correction factor, does not exceed 1 %. The proposed temperature observer can be used to build protections for asynchronous electric drives
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Liu, Xiang, Mian Li, and Min Xu. "A new anti-skid control method for electric vehicles using the motor torque and the wheel acceleration with experimental verification." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 231, no. 3 (August 5, 2016): 347–59. http://dx.doi.org/10.1177/0954407016639444.
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Driving electric vehicles by electric motors can result in many unique advantages for dynamic control of electric vehicles. With the superior fast and accurate torque control performance of electric motors, electric vehicles, in particular, can achieve higher levels of safety and handling performance. A simple, effective and efficient anti-skid control method specified for electric vehicles is proposed in this paper by considering the real-world resistance factors. This method is developed on the basis of sensing and regulating a newly defined parameter, namely the ratio of the drive motor torque to the angular acceleration of the wheels, both of which can be easily obtained for electric motors. The monotonic relationship between the slip ratio and the ratio of the drive motor torque to the angular acceleration of the wheels is proved under both acceleration conditions and deceleration conditions, by considering the real-world resistance factors. The simulations and the experimental results show that the ratio of the drive motor torque to the angular acceleration of the wheels can be efficiently used, instead of the slip ratio, in anti-skid control. The results indicate that electric vehicles can achieve high-performance vehicle motion control with more flexible and simplified configurations by using in-wheel electric motors.
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L., PANA. "Measurement and analysis of vibrations of electric motors on board container ships." Scientific Bulletin of Naval Academy XXIV, no. 1 (July 15, 2021): 145–56. http://dx.doi.org/10.21279/1454-864x-21-i1-018.
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The purpose of this paper is to measure and analysis the vibrations of electric motors on board container ships, in order to reduce the maintenance costs and implicitly in making the optimal decisions. In general, the faults that underlie electric motors are primarily due to mechanical and electrical efforts. Mechanical stresses occur as a result the overloads and rapid load variations. On the other hand, the overcurrents and overvoltages are usually in the close accordance with the power supplies. In this regard the mechanical faults cannot be analyzed by changing the parameters like voltage, current, power, frequency but in practice we can do analysis by used the high-performance testers with intelligent software for measuring the motor vibrations. The MarVib DC650 tester was used in this paper for analysis and measurement the vibrations of electric motors.
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Morimoto, Shigeo, Yoji Takeda, and Hiroshi Murakami. "Electric Motors for Home Applications – Development of Environment-Friendly Electric Motors." EPE Journal 14, no. 1 (February 2004): 24–30. http://dx.doi.org/10.1080/09398368.2004.11463550.
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Cao, Wenping, Abid Ali Shah Bukhari, and Lassi Aarniovuori. "Review of Electrical Motor Drives for Electric Vehicle Applications." July 2019 38, no. 3 (July 1, 2019): 525–40. http://dx.doi.org/10.22581/muet1982.1903.01.
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EVs (Electric Vehicles) have been rejuvenated over the last decades while the motor drive technologies are still evolving. This paper provides a review of electrical motor drive technologies used in EV applications, with a performance comparison of candidate machines and their drive topologies. EV applications demand high efficiency, high torque density, high reliability, and wide speed range while reducing weight, complexity, total costs and environmental impact. In the literature, DC (Direct Current) motors, IMs (Induction Motors) and PM (Permanent Magnet) motors can be generally found in marketplace whilst RMs (Reluctance Motors) have been researched for some time and are nearing commercial availability. This paper evaluates the performance of these four main types of electrical motor drives for EV propulsion applications using analytical methods. PM motors may offer the best performance in terms of torque density and compactness but the cost is the highest (primarily dominated by rare-earth permanent magnets), limiting their widespread application in mass production EVs. DC motors have their own merits but suffer from limited power density and necessity for maintenance. Induction motor drives are a mature and proven technology. In particular, squirrel-cage IMs are robust, reliable and inexpensive, striking a balance between system cost and complexity, power density and extended speed range. Reluctance motors can provide a good torque density and cost effective EV drive solutions. Their drawbacks can also be overcome by the use of power electronic converters and advanced control strategies. Induction and reluctance motor drives are well suited for cost sensitive mass production EV applications. Looking to the future, increased hybridization may be a way forward in industry which combines attractive features of different electrical machines and control algorithms and still offer much promise in performance and total cost. At last, reliability study on EVs requires historical information and driving patterns, demanding research expertise in eco-sociology, human behaviors as well as human-machine interface.
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Sterkhova, T. N. "USE OF INDUCTION HEATING FOR REPAIRING ELECTRIC MOTORS." Scientific Life 15, no. 4 (April 30, 2020): 528–34. http://dx.doi.org/10.35679/1991-9476-2020-15-4-528-534.
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The quality of the production process depends on the reliability of technological and electrical equipment. The technological process of repairing electric motors includes the assembly of the electric motor and its installation. To date, the dominant position for performing this operation is occupied by the methods of “sledgehammers” or “oil baths”. The assembly of the electric motor can be carried out after heating of its individual parts. Both of these assembly methods are quite time-consuming, time-consuming and require significant physical strength from the maintenance staff. One of the main tasks is to heat the motor housing to the required temperature, which ensures the free installation of the stator and rotor. The possibility of using induction heating at the final stage of repair of an electric motor is considered. Induction heating is the heating of conductive bodies in an electromagnetic field due to the induction of eddy currents in them. In this case, electrical energy is converted into thermal energy due to its triple conversion. The intensity and nature of the heating are influenced by the current frequency, the strength of the electric and magnetic fields. By changing the indicated values, it is possible to obtain the necessary character of heating, its intensity and uniformity. For the study, the line equipment and the assembly process of 14 sizes of electric motor housings of the DATA and AIML series were considered. Calculation of heating temperatures for connection with interference fit of the DATA 63 electric motor housing with a stator and a rotor with a bearing was made. The calculation results of the heating temperature in two ways showed that using the induction method, the elements of the electric motor heat up 15% faster than during the operation of the heater. When creating the installation, the following requirements must be taken into account: high electrical and thermal efficiency, ease of maintenance, ease of controlling the heating process, and the possibility of its full automation. The use of induction heating allows one to automate the heating process and assembly of the electric motor, and makes it possible to increase the accuracy of the process without reducing operating time, increasing the stability and quality of the entire process.
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Grebenikov, V. V., R. V. Gamaliia, and S. A. Dadychyn. "COMPARATIVE ANALYSIS OF MAGNETIC SYSTEMS OF PERMANENT MAGNET MOTORS FOR TRAM." Tekhnichna Elektrodynamika 2021, no. 5 (August 16, 2021): 27–37. http://dx.doi.org/10.15407/techned2021.05.027.
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A numerical study of eight configurations of magnetic systems of electric motors with permanent magnets for driving a tram was carried out. The permanent magnet electric motor can be used as a high-speed electric drive to replace the existing DC electric drive of a tram, and as a low-speed gearless electric drive of a new generation tram. The most promising configurations of magnetic systems of electric motors with permanent magnets for tram drive have been determined. By varying the geometrical and winding parameters of each of the investigated models of electric motors, the mechanical characteristics are determined, at which the given torque and power are achieved in the entire range of the rotor speed. Also, a thermal calculation was performed taking into account the urban driving cycle of high-speed electric motors with air cooling by a fan and low-speed ones in liquid cooling mode. The calculation of the characteristics of the investigated electric motors was carried out in the Simcentre MotorSolve software package. References 13, figures 8, tables 3.
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Najilatil Mazda, Chadziqatun, Dwi Agustina Kurniawati, and Ira Setyaningsih. "Analisis Triple Helix Peran Stakeholder Dalam Meningkatkan Penggunaan Motor Listrik Di Indonesia." Jurnal Teknologi 15, no. 2 (December 16, 2022): 118–23. http://dx.doi.org/10.34151/jurtek.v15i2.3167.
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In this modern era, the use of electric vehicles is not a new thing. The grand strategy of energy national (GSEN) has fourteen strategic programs to be implemented, one of them is increasing the use of battery- electric vehicles motorized, in order to reduce the imports of fuel oil (BBM) and LPG as well as equitable electrification in Indonesia. This program needs to support by cooperation and role contribution from participants (stakeholders). This study was conducted to determine the role of stakeholders to increasing the use of electric motors in Indonesia using a triple helix methode. The data collection was carried out through interviews and documentation studies. The analyze data was use miles and hubberman. The results showed that based on the triple helix analysis, there were 3 stakeholders involved to increasing the use of electric motors in Indonesia. There were universities, industry and government. The universities have a role in conducting research and development for electric motor products, this can be done through final project research or providing research grants the development electric motors topic. The industry has a role in producing electric motors, for example Gesit Companies which produces electric motors, and also raw materials industry and spare part industry as well as component of electric motors. The government has a role in regulations through policies of equitable electrification motor vehicles in Indonesia. One of them is from the Minister of Transportation Regulation (Permenhub) Number 65 of 2020 concerning the conversion of fuel motorcycles into battery-electric motorcycles.
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Chang, Sungwoo, Noboru Niguchi, Je-Hoon Lee, and Katsuhiro Hirata. "Improvement of Torque Performance and Energy Density of PM-Type Vernier Motor Utilizing Saddle Coil and Salient Pole." Applied Sciences 11, no. 6 (March 22, 2021): 2818. http://dx.doi.org/10.3390/app11062818.
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In electric motors, the use of rare-earth magnets has been increasing rapidly. A stronger magnet force of the magnet enables the motor’s higher performance, resulting in the most high-performance motors generally using rare-earth magnets. However, these magnets have two crucial disadvantages: the potential restrictions on the supply of rare-earth magnetic materials and the sharp fluctuation in price. Thus, many recent researches focus on developing high-performance electric motors and reducing the use of critical rare-earth magnets. By increasing the torque density of the motor, we can reduce the use of permanent magnets. Focusing on this point, and we presented a double half permanent magnet (DHPM)-type vernier motor. This paper proposed a new saddle coil permanent magnet vernier motor with improved performance compared to its predecessor. The main feature of the proposed motor is that the permanent magnet and coil in the stator of a DHPM-type vernier motor is replaced by salient poles and saddle coils, respectively. We also investigate its characteristics through various simulations.
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Nguyen Quang Thieu and V. V. Markov. "Rational control laws asynchronous electric traction." Izvestiya MGTU MAMI 5, no. 1 (January 10, 2011): 70–76. http://dx.doi.org/10.17816/2074-0530-69863.
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The paper considers the optimal control laws for asynchronous traction electric motors to minimize various types of losses, minimize consumption of active and reactive power, maximum overload capacity. The authors established that the joint management of the maximum torque and minimum total losses in the motor is most efficient traction control law for asynchronous traction electric motors.
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Rubanenko, Oleksandr, and Oleksii Tokarchuk. "DETERMINATION OF THE TECHNICAL CONDITION OF THE ELECTRIC MOTOR UNDER INCOMPLETE INITIAL DATA CONDITIONS." ENGINEERING, ENERGY, TRANSPORT AIC, no. 3(114) (September 28, 2021): 136–48. http://dx.doi.org/10.37128/2520-6168-2021-3-15.
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The article analyzes the damageability of electric motors at agricultural processing enterprises in Ukraine. Modern microprocessor systems are being introduced in order to automate the process of determining the technical condition of electric motors. Their software implements complex and informative methods for determining the current state of electric motors based on the analysis of the current values of diagnostic parameters. The current values of not all diagnostic parameters of electric motors are known at the time of determining the technical condition. Therefore, their predicted values are applied. The authors propose to evaluate the current technical condition of electric motors by analyzing the value of the coefficient of its residual life. The values of this coefficient vary from 1 p.p. (the engine is fine) to 0 p.p. (the engine is defective.) An example shows the use of software, namely, Anfis editor of the Fuzzy Logic Tool Box application of the Matlab application package, for creating a mathematical model of the residual life coefficient of an electric motor. It is noted that the error in training the model based on 582 considered variants of combinations of diagnostic parameters and the corresponding values of the residual life of the electric motor does not exceed 0.00288 p.p. (0.2%), and for test voters – 4.1%. Taking into account the large number of mutually influential diagnostic parameters of electric motors, in order to simplify the assessment of the current technical condition, we propose to use the integral diagnostic parameter the coefficient of residual life. At the same time, it is difficult to determine the technical condition of a working electric motor, because some diagnostic parameters can be measured in a disconnected or disassembled electric motor (for example, measuring the insulation resistance of the stator winding with a megaohmmeter or measuring the diameter of the rotor shaft under the bearing in order to identify the cause of vibration). Therefore, determined at the rate of the process, under such conditions, the technical state of the operating electric motor is predictable fuzzy. To determine it, one should use the methods and means of neuro-fuzzy modeling. Therefore, the problem of improving the quality of operation of electric motors in agricultural production by improving the quality of their diagnostics is relevant and of great national economic importance.
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Kovalev, Vladimir Z., Egor S. Balyklov, and Emil I. Husainov. "On some operating modes of a submersible induction electric motor." Yugra State University Bulletin 18, no. 4 (January 14, 2023): 93–102. http://dx.doi.org/10.18822/byusu20220493-102.
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Object of research: induction submersible electric motor as a part of electric drive centrifugal pump.
Subject of the research: non-nominal operation modes of induction submersible electric motors, including modes of wedging.
Purpose of research: creation of research methodology of operation of induction submersible electric motors at non-nominal modes of operation, including variation of frequency of feeding voltage and its magnitude.
Methods of research: theory of electromechanical transformation of energy, digital modeling, statistical data processing, methods designing of experiments.
Main results of research: the relevance of submersible electric motors research in non-nominal conditions is substantiated; the technique of asynchronous submersible electric motors operation research in non-nominal operating modes is built; the proposed technique is tested on the example of the ESP unit wedging mode.