Journal articles: 'Electric machinery'

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Ku, Y. H. "Electric machinery." Journal of the Franklin Institute 319, no. 4 (April 1985): 457. http://dx.doi.org/10.1016/0016-0032(85)90014-6.

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Wiik, Marianne Kjendseth, Shabnam Homaei, and Randulf Høyli. "A mapping of electric construction machinery and electric construction sites in Norway." Journal of Physics: Conference Series 2600, no. 4 (November 1, 2023): 042016. http://dx.doi.org/10.1088/1742-6596/2600/4/042016.

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Abstract The Norwegian construction industry is responsible for ca. 2.2 million tonnes CO2eq in 2021. The rise in GHG emissions, noise and air pollution in the built environment is becoming a potential hazard due to the large growth of construction activities within cities. As a response, actors from the Norwegian construction industry have converted diesel construction machinery to electric operation to reduce these impacts. As a result, the electric construction machinery market in Norway has grown exponentially. However, access to electric construction machinery varies greatly. The aim of this paper is to map the available electric construction machinery on the Norwegian market as first steps towards creating a database of electric construction machinery for subsequent energy and power demand modelling of fully electric construction sites. This paper also maps the regional differences in construction machine availability through mapping the known public construction sites in Norway that use electric construction machinery.

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Karasoy, Sertaç, Mustafa Burak Can, Fatma Öz, and Ferhan Fıçıcı. "Electric Motor Selection Criteria for Traction System in Construction Machines." Orclever Proceedings of Research and Development 4, no. 1 (May 31, 2024): 123–46. http://dx.doi.org/10.56038/oprd.v4i1.471.

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Recent developments in electric motors in construction machinery and the automotive sector's trend towards electric traction in recent years are among the factors triggering and influencing the shift towards electric traction in construction machinery. There is no doubt that electric construction machinery will be the first choice for urban operations in the future, but many research and development efforts are still ongoing to dominate the market. Electric motors are the most important components of power transmission systems in electric machines. The trend towards increasing power density and efficiency in power transmission systems contributes to different designs and improvements in basic electric motor topologies. This article provides an insight into the selection of electric motors to be used in power transmission components of electric construction machinery and allows for the comparison of different electric motors.

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Yuan, Jian, Hao Liu, and Yang Zhang. "Automatic detection method of abnormal vibration of engineering electric drive construction machinery." Electronic Research Archive 31, no. 10 (2023): 6327–46. http://dx.doi.org/10.3934/era.2023320.

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<abstract> <p>Aiming at the problem that the extraction effect of abnormal vibration characteristics of current engineering electric drive construction machinery is poor, an automatic detection method of abnormal vibration of engineering electric drive construction machinery is proposed. Firstly, the abnormal data of mechanical abnormal vibration are collected and identified, and based on the identification results, the dynamic characteristic model of engineering electric drive construction machinery is constructed. The empirical mode decomposition and Hilbert spectrum are used to decompose the abnormal vibration of machinery, calculate the response amplitude and time lag value generated by the operation of the engineering electric drive construction machinery to simplify the diagnosis steps of the abnormal vibration of the engineering electric drive construction machinery and realize the positioning and detection of the transverse and torsional vibration characteristics. Finally, through experiments, it was confirmed that the automatic detection method of the abnormal vibration of the engineering electric drive construction machinery has high accuracy, which can better ensure the healthy operation of mechanical equipment. This endeavor aims to establish scientific methodologies and standards for fault detection techniques in construction machinery, ultimately forging a versatile solution better suited for detecting and resolving issues across various categories of construction equipment.</p> </abstract>

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Сhervinsky, Leonid, Oleksandr Savoiskyi, and Viktor Sirenko. "The influence of ultrasonic processing on the structure and electrophysical properties of fruit in combined drying." Naukovij žurnal «Tehnìka ta energetika» 14, no. 2 (April 3, 2023): 70–79. http://dx.doi.org/10.31548/machinery/2.2023.70.

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The intensification of ultrasonic vibrations for the processing of agricultural products is becoming increasingly important in the food industry, as it can reduce energy consumption for the dehydration of raw materials. The research aims to study the effect of sonication on the change of electrophysical parameters and structure of apple raw materials in the process of combined drying using direct electric heating. Using scanning electron microscopy, images of the surface structure of dried apple samples were obtained at different combinations of sonication duration and methods of heat supply to the raw material during the drying process. Based on the experimental studies, the dependences of the current flowing through the sample in the process of combined drying using direct electric heating on the duration of raw material processing in an ultrasonic bath were obtained. The influence of preliminary sonication on the maximum values of the current strength during direct electric heating was determined. The dependences of changes in the resistivity of apple samples during dehydration at different pretreatment durations were investigated. The effect of ultrasound on the initial resistivity of apples, the duration of electro-plasmolysis, and the resistivity values at which the maximum values of the direct electric heating current are observed were determined. The results of the experiments show that the pretreatment of raw materials in an ultrasonic bath can reduce the peak current values by up to 27%. The initial values of the resistivity of the raw material after sonication are reduced by 7.8-13.8% compared to the control samples. The obtained images of the dried fruit surfaces showed an increase in the porosity and roughness of the samples. The obtained results of experimental studies can become a prerequisite for the development of an energy-efficient technical means of ultrasonic processing of fruit and vegetable raw materials before drying and the selection of optimal operating modes

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Saidane, A. "Electric Machinery and Transformers." Microelectronics Journal 32, no. 9 (September 2001): 787. http://dx.doi.org/10.1016/s0026-2692(01)00052-0.

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MU, Hongyun, Yanlei LUO, and Yu LUO. "Electro-Hydraulic Load-Sensitive Simulation Study of Walking Hy-draulic System of Electric Agricultural Machinery." Mechanics 28, no. 6 (December 5, 2022): 481–89. http://dx.doi.org/10.5755/j02.mech.31470.

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The conventional load-sensitive hydraulic drive chassis system for agricultural machinery uses a combination of engine and load-sensitive pump, which cannot adjust the control strategy according to the working conditions. It does not meet the current trend of energy-saving and emission reduction. To this end, an electro-hydraulic load-sensitive hydraulic drive chassis system for agricultural machinery, which uses a combination of permanent magnet synchronous motor and quantitative pump, is proposed. A variable LS differential pressure control and a variable differential pressure control of the pressure compensation valve to improve agricultural machinery's working performance are proposed. AMESim is used to establish the system simulation model to obtain the system composite motion, variable LS differential pressure control, and variable pressure differential control of the pressure compensation valve performance. The simulation results show that the system achieves the essential functions of a conventional load-sensitive system. The variable LS differential pressure control and the variable pressure differential control of the pressure compensation valve are feasible. They can effectively improve the performance of agricultural machinery to adapt to working conditions. It can effectively reduce the system energy consumption and provide a theoretical basis for the intellectualization of electric agricultural machinery.

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Yang, Guo Yong, and Kan Feng Gu. "Several Key Issues in the Electric Refitting of Engineering Machinery." Advanced Materials Research 663 (February 2013): 459–64. http://dx.doi.org/10.4028/www.scientific.net/amr.663.459.

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The position and application of hydraulic system on the engineering machinery are analyzed while the current situation and application of electric technology are discussed. A new idea is proposed in which the end effectors are driven by electric motors while the restriction of hydraulic system is taken over. Several key problems are analyzed during the refitting of engineering machinery such as the high-power, the distribution and focus of energy, the source of energy and the redesign of the control system. The detail is discussed with the Komatsu excavator PC200-8. The advantages of electric engineering machinery are also summarized.

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Spooner, E. "Book Review: Electric Machinery Fundamentals." International Journal of Electrical Engineering & Education 24, no. 2 (April 1987): 190. http://dx.doi.org/10.1177/002072098702400219.

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Sudhoff, Scott D., and Raj Sahu. "Metamodeling of Rotating Electric Machinery." IEEE Transactions on Energy Conversion 33, no. 3 (September 2018): 1058–71. http://dx.doi.org/10.1109/tec.2018.2793160.

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Strekalina, Daria, Elena Podust, Egor Yakushko, Polina Cheka, and Ulyana Shamaeva. "Tungsten coating technologies for agricultural machinery engine parts." E3S Web of Conferences 494 (2024): 04034. http://dx.doi.org/10.1051/e3sconf/202449404034.

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The article reviews the possibilities of using tungsten for engine parts of agricultural machinery and the transition to electric motors. The use of electric motors for agricultural machinery and experience in the production of electric tractors is described. A description of the manufacturers of electric tractors and their advantages is given. The materials of motor parts are described, including the use of tungsten. CVD coatings are selected and described as a technology for electric motor applications. The technology of obtaining tungsten coatings on the electrodes of the engine of agricultural machinery by the method of obtaining CVD coatings is proposed. In this article, the CVD coating mode is selected and the properties of the obtained coating according to the selected mode are analysed. The advantages of the coating are identified and the future development of the technology is described.

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Junge, Stefan, Mykola Zablodskiy, Nataliia Zaiets, Roman Chuenko, and Stanislav Kovalchuk. "The screw-type electrothermomechanical converter as a source of multiphysical influence on the technological environment." Naukovij žurnal «Tehnìka ta energetika» 14, no. 3 (July 12, 2023): 34–46. http://dx.doi.org/10.31548/machinery/3.2023.34.

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In ensuring the reliability of electromechanical converters in harsh conditions, the problem of increasing the energy efficiency of their application through structural, functional, and thermal integration with the technological environment is present. Thus, the research aims to determine the conditions of the direct multiphysical impact of a screw-type electromechanical converter on the technological environment. The method used is based on determining the list of features of screw-type electromechanical converters using the Comsol Multiphysics software, and a combination of three-dimensional and two-dimensional finite element models limited to the rotor with the inclusion of blades in the computational domain. Two variants of forming an algorithm for the multiphysical impact on the technological environment were studied: local concentration of the impact in certain areas of the rotor and uniform distribution along the rotor surface of temperature, pressure, magnetic induction, and electric field strength. The regularities of the distribution of magnetic induction on the outer surface of the ferromagnetic rotor at different azimuthal locations of the frontal parts of adjacent stators have been established. The distribution of the normal component of the magnetic flux density at the contact with the process medium in the form of rutile product or ilmenite concentrate is determined. The consumed electric energy is distributed in the stator tooth zone and the zone of electromagnetic field penetration into the rotor. Eddy currents are concentrated at the penetration depth from the rotor’s inner surface, with the penetration depth depending on the thermal state and sliding mode. The electric field intensity on the rotor’s outer surface reaches 0.8 V/m in the areas opposite the stator crowns and depends on the current activity of the phases at a given moment. Controlling the thermal and speed regime of the rotor can be used to create conditions for bioenergy stimulation on its surface in places of contact with the medium or to support the process of electrode heating of the technological medium. The adequacy of the mathematical models proposed for numerical modelling to the experimental data of the prototype of the screw electromechanical converter was confirmed, with deviations not exceeding 9.5%. The obtained results can be used to predict the optimal indicators of electromagnetic and heat transfer processes in screw electromechanical converters associated with the technological environment

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Safonov, A. S. "Basic measures allowing to increase the energy efficiency of electric equipment in agroindustrial complex." Traktory i sel hozmashiny 81, no. 6 (June 15, 2014): 48–51. http://dx.doi.org/10.17816/0321-4443-65640.

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Measures increasing energy efficiency of electric equipment in the agroindustrial complex are considered, namely applicability of energy efficient electric motors, frequency regulation and special electric motors in an electric drive of agricultural machinery.

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Xu, Shaoyi, Fangfang Xing, Ruilin Wang, Wei Li, Yuqiao Wang, and Xianghui Wang. "Vibration sensor for the health monitoring of the large rotating machinery: review and outlook." Sensor Review 38, no. 1 (January 15, 2018): 44–64. http://dx.doi.org/10.1108/sr-03-2017-0049.

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Purpose At present, one of the key equipment in pillar industries is a large rotating machinery. Conducting regular health monitoring is important for ensuring safe operation of the large rotating machinery. Because vibrations sensors play an important role in the workings of the rotating machinery, measuring its vibration signal is an important task in health monitoring. This paper aims to present these. Design/methodology/approach In this work, the contact vibration sensor and the non-contact vibration sensor have been discussed. These sensors consist of two types: the electric vibration sensor and the optical fiber vibration sensor. Their applications in the large rotating machinery for the purpose of health monitoring are summarized, and their advantages and disadvantages are also presented. Findings Compared with the electric vibration sensor, the optical fiber vibration sensor of large rotating machinery has unique advantages in health monitoring, such as provision of immunity against electromagnetic interference, requirement of less insulation and provision of long-distance signal transmission. Originality/value Both contact vibration sensor and non-contact vibration sensor have been discussed. Among them, the electric vibration sensor and the optical fiber vibration sensor are compared. Future research direction of the vibration sensors is presented.

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Bae, Insu, and Suan Lee. "A Multi-Input Convolutional Neural Network Model for Electric Motor Mechanical Fault Classification Using Multiple Image Transformation and Merging Methods." Machines 12, no. 2 (February 2, 2024): 105. http://dx.doi.org/10.3390/machines12020105.

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This paper addresses the critical issue of fault detection and prediction in electric motor machinery, a prevalent challenge in industrial applications. Faults in these machines, stemming from mechanical or electrical issues, often lead to performance degradation or malfunctions, manifesting as abnormal signals in vibrations or currents. Our research focuses on enhancing the accuracy of fault classification in electric motor facilities, employing innovative image transformation methods—recurrence plots (RPs), the Gramian angular summation field (GASF), and the Gramian angular difference field (GADF)—in conjunction with a multi-input convolutional neural network (CNN) model. We conducted comprehensive experiments using datasets encompassing four types of machinery components: bearings, belts, shafts, and rotors. The results reveal that our multi-input CNN model exhibits exceptional performance in fault classification across all machinery types, significantly outperforming traditional single-input models. This study not only demonstrates the efficacy of advanced image transformation techniques in fault detection but also underscores the potential of multi-input CNN models in industrial fault diagnosis, paving the way for more reliable and efficient monitoring of electric motor machinery.

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Tegopoulos, J. "Book Review: Analysis of Electric Machinery." International Journal of Electrical Engineering & Education 25, no. 1 (January 1988): 83–84. http://dx.doi.org/10.1177/002072098802500121.

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Salon, S. J. "Finite element analysis of electric machinery." IEEE Computer Applications in Power 3, no. 2 (April 1990): 29–32. http://dx.doi.org/10.1109/67.53227.

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Ciupitu, Liviu, Andrei Tudor, Doru Turcan, and Daniel Sandor. "Vibration Diagnosis of Electric Motor’s Bearings." Advanced Materials Research 463-464 (February 2012): 1725–28. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.1725.

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Recently technologies like vibration monitoring or acoustic measurement help the maintenance to improve the OEE (overall equipment effectiveness) factor. For example SKF company uses for fault detection vibration and temperature sensors and vibration signal processing techniques that differentiate between normal machinery process vibrations and abnormal vibrations caused by machinery faults. The fault can be eliminated or monitored until maintenance and repairs can be organized in a cost-effective way. The type of pattern with frosted or fluted features on the bearing inner or outer race it's often found on the electrical motors bearings due to electric discharge inside motor. This defect can decrease the asset life time from months to days and could lead to catastrophic defects.

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Guo, Tong, Tianliang Lin, Qihuai Chen, Haoling Ren, and Shengjie Fu. "Research on Constant Power Control Strategy of Pure Electric Excavator." Applied Sciences 10, no. 21 (October 28, 2020): 7599. http://dx.doi.org/10.3390/app10217599.

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Electric construction machinery can achieve zero emissions and be pollution free in the process of construction. In an electric excavator, to make full use of the output power of the power source, the output power of the electric motor (EM) should be absorbed by a hydraulic pump on the most attainable level. Therefore, constant power control is generally employed to achieve power matching between the power source and hydraulic pump. In this paper, considering the shortcomings of a single constant power point in a traditional load sensing system of electric construction machinery, combining the discharge characteristics of the li-ion battery and the overload capability of EM, a piecewise constant power control strategy is proposed to realize the organic unity of power and safety for a novel electric construction machinery power train system. The control strategy is verified by simulations and experiments. The results show that the system can not only satisfy the large power output but also ensure the normal and stable operation of the system when the electric excavator meets the heavy load through the piecewise constant power control. The proposed control strategy improves the dynamic performance of the system on the basis of ensuring the safety of the system.

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Ma, Yuchuan, Qiao Wang, Min Ye, and Gaoqi Lian. "Robust Control for the Hybrid Energy System of an Electric Loader." Machines 11, no. 4 (April 4, 2023): 454. http://dx.doi.org/10.3390/machines11040454.

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With the wide application of electric vehicles and the development of battery technology, pure electric construction machinery (PECM) has received more and more attention due to its high efficiency and no pollution. The working conditions of construction machinery are complex and accompanied by periodical working conditions and heavy load. For electric construction machinery, a heavy load represents an energy supply with a large current. To adapt to the working conditions of PECM, this paper proposes a robust controller to regulate the current of the hybrid energy system (HES) which include the battery and supercapacitor. The V-type operating conditions of a 5-ton pure electric loader are the research focus to analyze the working principles of the HES. The topology and energy flow patterns of the HES are proposed and analyzed. The model of the battery, supercapacitor, and DC/DC converter are depicted, and the robust control method is designed. An electric loader experiment platform is created to verify the effectiveness of the robust control method. Compared with the proportional integral control effect, the experiment results show that the proposed control method had good control performance and could better regulate the current. It can be used as a reference value for other dual energy source PECM.

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Zhang, Shi-qi, and Chang-yong Yin. "Optimal scheduling of power system with wind power considering deep peak regulation of fire-storage and demand response." Journal of Physics: Conference Series 2427, no. 1 (February 1, 2023): 012035. http://dx.doi.org/10.1088/1742-6596/2427/1/012035.

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Abstract In the context of the integration capacity of wind power has increased rapidly, because the large sporadic and instability characteristics of wind power machinery, it has brought challenges in peak adjustment of power equipment machinery. Therefore,if we want to increase the peak load capacity of the electric power channel, we should improve the consumption of new energy. This constructs a electric power channel optimization model with demand response and a unit-peaking output model. The validity of the example is verified.

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Li, Zhongshen, Yuanzheng Lin, Qihuai Chen, Kai Wu, Tianliang Lin, Haoling Ren, and Wen Gong. "Control Strategy of Speed Segmented Variable Constant Power Powertrain of Electric Construction Machinery." Applied Sciences 12, no. 19 (September 27, 2022): 9734. http://dx.doi.org/10.3390/app12199734.

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Energy conservation and emission reduction have become a global development consensus. Traditional construction machinery driven by an engine has high energy consumption and poor emission. Electric construction machinery is considered to be one of the main trends in the future due to its zero emissions by canceling the engine and using the motor-driven hydraulic system. However, most of the existing electric construction machinery works through the motor to simulate the engine without considering the regulation characteristics of the motor. Therefore, although the existing electric construction machinery improves the emission and the energy efficiency of the power system to a certain extent, the control of the motor and hydraulic systems can still be further optimized. The energy efficiency of the whole machine can be maximized. Based on the LUDV system of construction machinery, a control strategy based on motor speed classification and variable constant power can automatically identify the actual working conditions of the electric excavator and adjust the starting pressure of the constant power valve, to change the constant power range of hydraulic pump and achieve the goal of adapting to the working conditions of power system, is proposed. Simulation and experiments are carried out to verify the feasibility of the proposed control strategy. The results show that the speed classification and variable constant power control system can effectively realize the hierarchical regulation of motor speed and provide relatively stable speed input for the hydraulic system. Moreover, the current working condition can be identified through the pump outlet pressure. The adaption of the working conditions can be realized through the proportional reducing valve by adjusting the starting pressure of the variable constant power valve.

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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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Guo, Tong, Yongjie Chen, Qihuai Chen, Tianliang Lin, and Haoling Ren. "An IPMSM Control Structure Based on a Model Reference Adaptive Algorithm." Machines 10, no. 7 (July 17, 2022): 575. http://dx.doi.org/10.3390/machines10070575.

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Traditional construction machinery has the disadvantages of low energy efficiency and poor emissions, which do not meet the requirements of environmentally friendly industrial development. Electric construction machinery has attracted more and more attention because of its advantages of zero emissions and high energy efficiency, which are considered to be important factors in the future development of construction machinery. Preliminary attempts to introduce electric motors into construction machinery usually only adopt the motor for simulating the working mode of the engine, with it providing power for the system. Because the output power of the motor needs to be matched with the actual load through the transmission of the hydraulic torque converter, it is difficult to maximize the advantages of high energy efficiency for the electric drive. This paper studied the direct drive technology within electric construction machinery and presents a model reference adaptive algorithm (MRAA) based on maximum torque per ampere (MTPA)-vector control of an internal permanent magnet synchronous motor (IPMSM). The reference motor model was established, and the real-time dynamic reference value of the motor was obtained based on a model with the motor voltage and current as inputs. Simulations based on MATLAB/Simulink verified the feasibility of this control method. The results indicate that the MRAA can identify the motor flux linkage value and the d-q axis inductance within 50 ms in real time, with the error controlled within 2%. Additionally, when the motor operates at low speed, compared with the traditional MTPA algorithm under fixed-parameter control, the starting torque ripple of the IPMSM control method based on reference model adaptation was reduced to 23.8%, which proves that the MRAA can achieve good low-speed response characteristics and stability.

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Fu, Shengjie, Zhongshen Li, Tianliang Lin, Qihuai Chen, and Haoling Ren. "A Positive Flow Control System for Electric Excavators Based on Variable Speed Control." Applied Sciences 10, no. 14 (July 14, 2020): 4826. http://dx.doi.org/10.3390/app10144826.

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Energy conservation and emission reduction of construction machinery are the focus of current research. The traditional excavator, whose hydraulic pump is driven by the engine, has high fuel consumption and emissions. Furthermore, it is difficult to match the working point of the engine to that of the hydraulic pump. Current pure electric drive technology has the advantages of zero pollution and low noise, and the motor used has the advantages of fast response and a wide speed range. Based on the characteristics of the pure electric drive technology, a positive flow system based on variable speed constant displacement instead of a variable displacement pump for pure electric construction machinery is put forward to realize the flow-matching of the whole machine. The basic structure and working principle were introduced. The control process was analyzed. The controllability and energy saving of the proposed system were tested through simulation and experimental analysis. The research results showed that the controllability of the proposed positive flow system was comparable to that of the traditional throttling speed-regulating control system. The energy-saving efficiency of the proposed positive flow system is increased by 35.2% compared to that of the tradition control system. To further exploit the strong overload capacity of electric motors of electric construction machinery and solve the insufficient power under sudden load, research on constant power control will be carried out in the future.

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Tang, Haitao, Mengxuan Li, Zhenqiang Zhao, Xiao Ma, Yuwen Li, Zhi Yang, and Jindong Yu. "A Safety Distance Warning Method for Transmission Lines Based on the Relationship Between Approach Angle and Field Strength." Journal of Physics: Conference Series 2477, no. 1 (April 1, 2023): 012040. http://dx.doi.org/10.1088/1742-6596/2477/1/012040.

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Abstract To prevent construction machinery from intruding into the transmission corridor, a distance early warning method based on the relationship between the approach angle and the electric field strength is proposed. First, use the simulation analysis to determine the installation position of the electric field sensor. Then, the relationship between the approach angle and the electric field strength at the minimum safe distance outside the transmission line for different voltage levels, number of loops, and loop arrangement are analyzed, and the approach angle and electric field strength are used as comprehensive criteria. Finally, the relationship between the comprehensive criteria of various types of transmission lines is analyzed. Through the method proposed in this paper, an effective control method can be provided for maintaining the minimum safe distance when the construction machinery works near the transmission line.

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Suryandi, Asep Andi, Nur Sarma, Anees Mohammed, Vidyadhar Peesapati, and Siniša Djurović. "Fiber Optic Fiber Bragg Grating Sensing for Monitoring and Testing of Electric Machinery: Current State of the Art and Outlook." Machines 10, no. 11 (November 21, 2022): 1103. http://dx.doi.org/10.3390/machines10111103.

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This paper presents a review of the recent trends and the current state of the art in the application of fiber optic fiber Bragg gratings (FBG) sensing technology to condition the monitoring (CM) and testing of practical electric machinery and the associated power equipment. FBG technology has received considerable interest in this field in recent years, with research demonstrating that the flexible, multi-physical, and electromagnetic interference (EMI) immune in situ sensing of a multitude of physical measurands of CM interest is possible and cannot be obtained through conventional sensing means. The unique FBG sensing ability has the potential to unlock many of the electric machine CM and design validation restrictions imposed by the limitations of conventional sensing techniques but needs further research to attain wider adoption. This paper first presents the fundamental principles of FBG sensing. This is followed by a description of recent FBG sensing techniques proposed for electric machinery and associated power equipment and a discussion of their individual benefits and limitations. Finally, an outlook for the further application of this technique is presented. The underlying intention is for the review to provide an up-to-date overview of the state of the art in this area and inform future developments in FBG sensing in electric machinery.

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Krause, P. C., and O. Wasynczjk. "Analysis of Electric Machinery [Books and Reports]." IEEE Power Engineering Review 15, no. 3 (March 1995): 40. http://dx.doi.org/10.1109/mper.1995.365078.

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Hiziroglu, Huseyin R. "A Special Issue: Electric Machinery and Transformers." Energies 16, no. 15 (July 31, 2023): 5707. http://dx.doi.org/10.3390/en16155707.

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As the demand for electrical energy increases worldwide, engineers and scientists have been investigating new electrical systems and materials to meet this demand economically, having large-scale planning and employing environmentally friendly energy production and energy-efficient systems for consumption to minimize adverse environmental effects [...]

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Ferrari, Marco, Daniele Beltrami, and Stefano Uberti. "Retrofitting Battery Electric Machinery with Unchanged Hydraulic System and Enhanced Control Strategies." Actuators 13, no. 5 (May 16, 2024): 191. http://dx.doi.org/10.3390/act13050191.

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The push for environmental sustainability has accelerated the acceptance of electric vehicles, as well as the exploration of electrified Non-Road Mobile Machinery. This study emphasizes the challenges of electrifying off-highway machinery, which include the many machinery layouts and the presence of Small- and Medium-sized Enterprises in the market. Recognizing the barriers faced by these companies, this paper shows how modeling and simulation can be effective tools for system integration and control optimization, even when lacking extensive expertise in the topic. However, it emphasizes the need for user-friendly modeling tools and methods adaptable to the operational needs of Small- and Medium-sized Enterprises. This study presents a case study of a retrofitted battery-electric hydraulic material handler. The machinery is simulated using Simscape, and the accuracy of the model is confirmed through experimental validation. By simulating a rational duty cycle, this study proposes two solutions for performance enhancement while maintaining the integrity of the hydraulic system. These solutions offer a balanced compromise between energy consumption and productivity and a novel control algorithm to minimize energy consumption. Most importantly, the two proposed solutions can be easily switched by the operator, which can decide to favor productivity over energy saving based on driving needs.

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Khodpan, Marut, Sanguan Vongchavalitkul, and Sanguan Patamatumakul. "Risk Management of Electric Energy Consumption in Industrial." Advanced Materials Research 301-303 (July 2011): 691–94. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.691.

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This study presents a risk management of the electric energy consumption in Nakhonratchasima industrial, case study in Thai Sanguan Cassava Starch Co.,Ltd. by AS/NZS 4360:2004 risk management standard. The objective of this study is to reduce the risk of electric energy consumption. Based on the risk inspection, the impact analysis of electric energy consumption is applied to manage an occasion risk. The analyzed risks are consumption risks and device risks. The consumption risks are load factor, the ratio of electric energy consumption to production unit and power consumption of each unbalance phase. The device risks are an efficiency of machinery and equipment, water pump usages, lighting system and air condition system. The results show that the use of machinery and equipment is the highest risk. Load factor, the ratio of electric energy consumption to production unit and water pump usages are ranged in medium risk level, while each phase of electric energy consumption, lighting system and air condition system are in low risk level. As a priority result, machine maintenance is an initial management to decrease the electric energy consumption. For reducing the electric energy demand, work schedule has been rearranged to enlarge the load factor. Operator controlling will reduce the ratio of electric energy consumption to production unit. The inverter, which is used to control motor in water pump usages, also reduce the risk of electric energy consumption. Finally, the low impact factor from lighting and air condition system are neglected.

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Xu, Wei, Chang Geng Shuai, and Zhi Qiang Lv. "Dynamic Model of Elastically Mounted Machinery with Cylindrical Shell." Applied Mechanics and Materials 419 (October 2013): 423–31. http://dx.doi.org/10.4028/www.scientific.net/amm.419.423.

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Mounting machinery by isolators can reduce vibration transmitted to the base and attenuated environmental noise. In this paper the machine having cylindrical shell such as electric motors is modeled by thin-wall cylindrical shell motion equation. The reaction force exerted by isolator is considered as point force and integrated in the shell equation. The typical vibration excitation of machinery is represented by point and line excitations. The forces transmitted to the base through isolators are then calculated under different excitations. Conclusions with respect to machinery and isolation system design are presented based on numerical results.

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Wu, Chuan Hui, Yan Gao, and Yu Guo. "Study on Remote Condition Monitoring and Fault Diagnosis System for Rotating Machinery Based on LabVIEW." Advanced Materials Research 430-432 (January 2012): 1939–42. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1939.

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In order to suit the demand of monitoring and fault diagnosis of modern small and medium machinery devices better, this paper discusses the development of machinery condition monitoring and fault diagnosis system of good universality and strong expansibility using LabVIEW. Mainly illuminates vibration signal, temperature signal and electric current signal acquisition module using NI data acquisition hardware; signal analysis module in time domain, frequency domain and joint time–frequency domain using signal processing technology. DataSocket, database and fuzzy diagnosis technique have been utilized enabling this system to monitor and diagnose machinery fault remotely.

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Lubis, Zulkifli, Abdul Ghofur, and Kemal Farouq Mauladi. "Pelatihan Manajemen Usaha Es Puter Melalui Pemanfaatan Teknologi Digital Dalam Upaya Memperkuat Perekonomian Masyarakat Di Kecamatan Glagah Kabupaten Lamongan." BERDAYA: Jurnal Pendidikan dan Pengabdian Kepada Masyarakat 2, no. 2 (August 4, 2020): 69–74. http://dx.doi.org/10.36407/berdaya.v2i2.216.

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Sales Ice Puterin the community so far generally still use the tradition always of course low productivity and the results are less hygienic. Because it is the Science Team Community Service of the Wijaya Putra University of Surabaya make appropriate technology tools/machine ice puter equipped electric motor. It is useful for UKM Partners Ice Puternamely Mr.Paiman and Mr.Suradi to increase productivity can certainly improve the welfare and new labor opportunities. With the appropriate Technology Equipment/ Machinery Ice Puteri's expected later UKM partners can increase production capacity, the result is more hygienic, more varied tastes, and able to manage their finance in an orderly and systematic. Keywords: Productivity, Machinery, Electric Motors, Production Capacity

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Yu, Li, Wenyong Guo, Xinglong Pan, and Hantao Chen. "Analysis and Research on Cold Proof Design of Polar Marine Machinery." Journal of Physics: Conference Series 2125, no. 1 (November 1, 2021): 012060. http://dx.doi.org/10.1088/1742-6596/2125/1/012060.

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Abstract Polar marine machinery is an important equipment for China to participate in Arctic energy exploitation. The Arctic region is rich in natural resources and has a very important strategic position. As an important equipment for passage and exploitation of energy, its key technology is particularly important. As a special ship sailing in polar regions, polar ships generally adopt electric heat tracing measures due to the adverse environment in polar regions. The deck machinery and facilities shall be protected against cold. This paper mainly studies the convection of flat plate members under constant heat flow electric heating. The research results can be popularized and applied to the cold protection of most upper facilities of polar ships.

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Chen, Guo Jin, Ting Ting Liu, Jing Ni, Ming Xu, and Huo Qing Feng. "Study on the Driver Control System of the Full AC Electric Stacking Forklift." Applied Mechanics and Materials 271-272 (December 2012): 1658–63. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.1658.

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Logistics Machinery is the important equipment for carrying material. The all-electric logistics machinery is a development trend in the international logistics industry today. This paper studies the intelligent control model and algorithm for the driver control system of the full AC electric stacking forklift, proposes the composite models of the fuzzy neural network’s identification NNM and the Self-tuning PID NNC, and designs the variable frequency module of the speed sensorless vector control. Through the organic integration of the variable frequency module, the speed reducer and the AC motor, we develop the integrated machine used for the driver control system of the full AC electric stacking forklift. The paper put forward the intelligent control method of the variable frequency which combines the load’s characteristic recognition with the control to achieve the best matching, the highest efficacy and the lowest energy consumption of the entire transmission system.

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Righi, Marco. "Clean Energy in the Industrial Machinery Market." Industrial Vehicle Technology International 28, no. 3 (September 2020): 55. http://dx.doi.org/10.12968/s1471-115x(23)70378-4.

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Li, Qing Tian. "Research on Application of Hall Integrated Sensors." Applied Mechanics and Materials 226-228 (November 2012): 1971–74. http://dx.doi.org/10.4028/www.scientific.net/amm.226-228.1971.

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This essay study that in magnetic field and current intensity, measurement, work of electric motor regulating speed applied by Hall integrated sensor shows that in electrical machinery electric circuit control and automatic control system, using Hall integrated sensor has stable properties, high reliability, good temperature stable properties, anti-pollution, without touch dot, etc advantages, comparing with traditional automatic control electric circuit has obvious advantages. It attaches importance to many people in practical use.

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Song, Li Min. "A Research on Modular Training System of Automobile Engine." Advanced Materials Research 774-776 (September 2013): 438–42. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.438.

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The multifunctional modular training system for electric-controlled engine, which consists of disassembly and assembly module, wiring module of sensor and actuator and controller, detection module of electric controlling system, can achieve the function of machinery system and electric controlling system disassembly and assembly and engine fault diagnosis and analysis. It can meet the need of making real training and improve research capabilities for the teachers and students in related specialty of vocational colleges.

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ISHIHARA, YOSHIYUKI. "Topics of The Magnetic Materials for Electric Machinery." Journal of the Institute of Electrical Engineers of Japan 119, no. 7 (1999): 428–31. http://dx.doi.org/10.1541/ieejjournal.119.428.

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Li, Yueyang, Wenzhi Deng, Xiaofei Cheng, Weihai Song, Zhen Li, and Xianchong Zhang. "Design of Electric Steering Wheel for Agricultural Machinery." Journal of Physics: Conference Series 1601 (July 2020): 022041. http://dx.doi.org/10.1088/1742-6596/1601/2/022041.

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Nehrir, M. H., F. Fatehi, and V. Gerez. "Computer modeling for enhancing instruction of electric machinery." IEEE Transactions on Education 38, no. 2 (May 1995): 166–70. http://dx.doi.org/10.1109/13.387219.

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He, Xiangyu, and Ying Jiang. "Review of hybrid electric systems for construction machinery." Automation in Construction 92 (August 2018): 286–96. http://dx.doi.org/10.1016/j.autcon.2018.04.005.

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Wu, Jiangdong, Haoling Ren, Tianliang Lin, Yu Yao, Zhen Fang, and Chang Liu. "A Pure Electric Driverless Crawler Construction Machinery Walking Method Based on the Fusion SLAM and Improved Pure Pursuit Algorithms." Sensors 23, no. 18 (September 10, 2023): 7784. http://dx.doi.org/10.3390/s23187784.

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Driverless technology refers to the technology that vehicles use to drive independently with the help of driverless system under the condition of unmanned intervention. The working environment of construction machinery is bad, and the working conditions are complex. The use of driverless technology can greatly reduce the risk of driver operation, reduce labor costs and improve economic benefits.Aiming at the problem of the GPS positioning signal in the working environment of construction machinery being weak and not able to achieve accurate positioning, this paper uses the fusion SLAM algorithm based on improved NDT to realize the real-time positioning of the whole vehicle through reconstruction of the scene. Considering that the motion characteristics of crawler construction machinery are different from those of ordinary passenger cars, this paper improves the existing pure pursuit algorithm. Simulations and real vehicle tests show that the algorithm combined with the fusion SLAM algorithm can realize the motion control of driverless crawler construction machinery well, complete the tracking of the set trajectory perfectly and have high robustness. Considering that there is no mature walking method of driverless crawler construction machinery for reference, the research of this paper will lay a foundation for the development of driverless crawler construction machinery.

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Yao, Wu-Sung. "Modeling and stabilization of eccentric gravity machinery." Advances in Mechanical Engineering 10, no. 1 (January 2018): 168781401775178. http://dx.doi.org/10.1177/1687814017751782.

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In general, eccentric gravity machinery is a rotation mechanism with eccentric pendulum mechanism, which can be used to convert continuously kinetic energy generated by gravity energy to electric energy. However, a stable rotated velocity of the eccentric gravity machinery is difficult to be achieved only using gravity energy. In this article, a stable velocity control system applied to eccentric gravity machinery is proposed. The dynamic characteristic of eccentric gravity machinery is analyzed and its mathematical model is established, which is used to design the controller. A stable running velocity of the eccentric gravity machinery can be operated by the controlled servomotor. Due to disturbances being periodic, repetitive controller is installed to velocity control loop. The stability performance and control performance of the repetitive control system are discussed. The iterative algorithm of the repetitive control is executed by a digital signal processor TI TMS320C32 floating-point processor. Simulated and experimental results are reported to verify the performance of the proposed eccentric gravity machinery control system.

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Pevzner, L. D., and N. A. Kiselev. "Automatic control system for walking dragline excavator digging." Gornye nauki i tekhnologii = Mining Science and Technology (Russia) 7, no. 1 (April 12, 2022): 57–65. http://dx.doi.org/10.17073/2500-0632-2022-1-57-65.

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This paper presents the results of the development of automatic control systems for walking dragline excavator digging process. The process enables operational productivity to be enhanced through optimizing digging process. This also prevents extreme loads on machinery and hoist cable deﬂection. The paper also describes mathematical models of the electric drives of the main excavator machinery which form the bucket motion and the model of cable length change. Further the study will analyse the tructure of the control system and the automatic digging algorithm. Computer modeling ﬁndings are also described to conﬁrm the operability of the automatic digging algorithm. Computer simulation of the processes in electric drives of main machinery of a walking dragline in digging operations was performed by means of SimInTech software. The automatic control system optimizes digging trajectory with very fast penetration with permissible overregulation following digging at a constant cut depth. The integrated system of dragline operation process control is practically independent due to the following factors: the automatic digging control system in combination with automatic systems for transporting the loaded bucket to dump and the empty bucket to the face; the automatic main machinery overload protection systems; and the system of control over safe bucket movement in the dragline working space.

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Li, Zhongshen, Qihuai Chen, Yongjie Chen, Tianliang Lin, Haoling Ren, and Wen Gong. "High-Performance Control Strategy for Low-Speed Torque of IPMSM in Electric Construction Machinery." Machines 10, no. 9 (September 15, 2022): 810. http://dx.doi.org/10.3390/machines10090810.

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Electric construction machinery with zero emission and high efficiency is considered to be a main development trend. An electric motor (EM) in electric construction machinery often needs to work at low speed or even in stalling conditions with large torque value and high work efficiency. In this paper, based on vector control of the maximum torque per ampere (MTPA) of an internal permanent magnet synchronous motor (IPMSM), a voltage and current composite observation algorithm was studied to improve IPMSM control performance at low speed. By establishing the observer model, the amplitude limited compensation for the voltage flux observation method was used to observe the EM stator flux. After being combined with the current observation method and the stator current obtained by coordinate transformation, the EM parameters in real-time can be identified for MTPA. Experimental research was carried out. The results show that the algorithm improved the speed control characteristic and output torque per unit current of the EM under low-speed working conditions.

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Kashirskikh, Veniamin, Valery Zavyalov, Irina Semykina, and Valery Borovtsov. "The Computer System for Monitoring of Induction Motors Condition of Mining Machinery." E3S Web of Conferences 105 (2019): 03023. http://dx.doi.org/10.1051/e3sconf/201910503023.

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The possibility of carrying out monitoring of parameters and variables of the induction electric motor (IM) working as a part of the electric mining machinery drive is considered. Monitoring is carried out on the working inventory in real time by means of the computer system on the basis of the IM mathematical model, mathematical estimation methods and also information which is contained in easily measured phase tension and IM stator currents. As a result IM indicators are defined difficult or cannot be measured in the mining machinery operation course. These are the active and induced windings resistances of a stator and a rotor, a magnetic linkage, an angular frequency of a rotor rotation and the electromagnetic moment. Algorithms of dynamic IM identification and the software are developed for carrying out monitoring. Theoretical provisions and conclusions are confirmed with results of the pilot studies. Information received during monitoring can be used for perfecting of the electric drive.

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Wu, Longqi. "Compare And Analyze The Popularity of Fuel Vehicles in China and The United States—An Overview And Perspective of Fuel Cell Vehicles." Highlights in Science, Engineering and Technology 59 (July 15, 2023): 148–57. http://dx.doi.org/10.54097/hset.v59i.10074.

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Fuel cell vehicle machinery has substantial repercussions for energy policy and ecological protection. In the last era, China and the US have shown diverse progress in fuel cell vehicle manufacturing as the management's strategy issuances and enterprise's manufacture. Conversely, there are still roughly technical and expense difficulties impeding the commercialization of fuel cell automobiles. In this research, the position of China and the US fuel electric vehicles research method is analyzed comprehensively from various perspectives. Furthermore, the results of the fuel-electric vehicles are discussed and compared. The unique features and major concerns of each manufacturing segment are highlighted. Additionally, the performances of fuel cell electric vehicles perspective are reviewed on pre-existing works and information. With the combination of the fuel cell vehicle of business status and machinery performances, it is emphasized those technological developments in fuel cells and the optimization of the production methods for fuel cell structures are vital in manufacturing fuel cell vehicles.

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Tang, HaiTao, MengXuan Li, ZhenQiang Zhao, Xiao Ma, YuWen Li, Zhi Yang, and JinDong Yu. "Transmission Line External Breakage Early Warning Method Based on Electric Field Perception." Journal of Physics: Conference Series 2527, no. 1 (June 1, 2023): 012069. http://dx.doi.org/10.1088/1742-6596/2527/1/012069.

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Abstract To prevent construction machinery from intruding into the transmission corridor during operation and causing damage to the normal operation of the line, this paper uses the relationship between the horizontal distance of the boom measurement point at the minimum safe distance, the angle of the boom to the ground and the field strength as a comprehensive criterion to carry out an early warning of the transmission line breaking. The method studied in this paper can provide a simple and accurate distance warning method for various types of construction machinery when they work in the vicinity of different types of transmission lines.

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Journal articles on the topic 'Electric machinery'

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