Relevant bibliographies by topics / Sensorless driving

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Sensorless driving'

Author: Grafiati
Published: 28 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Sensorless driving"

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Chen, En-Ping, Jiangfeng Cheng, Jia-Hung Tu, and Chun-Liang Lin. "Sensorless Driving/Braking Control for Electric Vehicles." Actuators 9, no. 1 (March 22, 2020): 22. http://dx.doi.org/10.3390/act9010022.

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A sensorless driving/braking control system for electric vehicles is explained in the present paper. In the proposed system, a field-oriented control (FOC) was used to integrate driving and braking controls in a unified module for reducing the cost of hardware and simultaneously incorporating functional flexibility. An antilock braking system can swiftly halt a vehicle during emergency braking. An electromagnetic reverse braking scheme that provided retarding torque to a running wheel was developed. The scheme could switch the state of the MOSFETs used in the system by alternating the duty cycle of pulse width modulation to adjust the braking current generated by the back electromotive force (EMF) of the motor. In addition, because the braking energy required for the electromagnetic braking scheme is related only to the back EMF, the vehicle operator can control the braking force and safely stop an electric vehicle at high speeds. The proposed integrated sensorless driving and electromagnetic braking system was verified experimentally.
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Guo, Hai-Jiao, Seiji Sagawa, and Osamu Ichinokura. "Position Sensorless Driving of BLDCM Using Neural Networks." IEEJ Transactions on Electronics, Information and Systems 124, no. 11 (2004): 2329–35. http://dx.doi.org/10.1541/ieejeiss.124.2329.

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GUO, Hai-Jiao, Seiji Sagawa, and Osamu Ichinokura. "Position sensorless driving of BLDCM using neural networks." Electrical Engineering in Japan 162, no. 4 (2007): 64–71. http://dx.doi.org/10.1002/eej.20240.

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Meng, Zhao Jun, Rui Chen, and Yue Jun An. "Direct Torque Control of Interior Permanent Magnet Synchronous Motors Based on Position Sensorless Control." Advanced Materials Research 756-759 (September 2013): 627–31. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.627.

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The position sensorless control method based on direct torque control was carried out aiming at the interior permanent magnet synchronous motor (IPMSM) in this paper. To the consideration of electric vehicle space is limited, in order to reduce the controller size to save space, this paper studied the sensorless control. Meanwhile, in order to improve the control rapidity as much as possible of the electric vehicle, take direct torque control as a control method of the driving motor. Finally, designed the sensorless direct torque controller and studied its simulation. Simulation results show that the control system have good dynamic and static characteristics in the full speed range.
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Hoffstadt, Thorben, and Jürgen Maas. "Sensorless force control for dielectric elastomer transducers." Journal of Intelligent Material Systems and Structures 30, no. 9 (January 29, 2018): 1419–34. http://dx.doi.org/10.1177/1045389x17754255.

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Multilayer stack-transducers made of dielectric elastomers generate considerable tensile forces and deformations when they are electrically stimulated. Thus, due to their capacitive behavior, they are for example energy efficient substitutes for conventional electromagnetic drives and enable various further completely new applications. Within this contribution, we present a sensorless force control for dielectric elastomer stack-transducers driven by a bidirectional flyback-converter. This force control for example can be used as interface for superimposed application-oriented controls. First of all, the properties of dielectric elastomer stack-transducers and the flyback-converter as well as its control structure are summarized. Due to the characteristic behavior of the power converter, the design of a sliding mode force controller is carried out based on an analytical model of the coupled electromechanical system containing the transducer and driving electronics. Using this model, the transducer force can be determined with the measured driving voltage and deformation so that an explicit force measurement is not required. In a first step, a two-point controller is developed for the variable structure control that is afterward extended in order to improve the control quality, for example, by adapting the inner power converter control. Finally, the experimental validations with a prototype stack-transducer and bidirectional flyback-converter demonstrate the feasibility as well as the precision and dynamics of the developed force control.
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Kumar, Ganisetti Vijay, Min-Ze Lu, and Chang-Ming Liaw. "A Highly-efficiency Position Sensorless Electric Vehicle Synchronous Reluctance Motor Drive." Journal of Energy and Power Technology 03, no. 03 (May 2, 2021): 1. http://dx.doi.org/10.21926/jept.2103037.

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The development of high-efficiency motor drives for various applications is important in the industry 4.0 era, especially for their extensive application to electric vehicles (EVs). In this study, a position sensorless EV synchronous reluctance motor (SynRM) drive has been developed, which exhibits good driving performance and efficiency over a wide speed and load range. To solve the key problems popularly encountered in the existing approaches, the high-frequency injection (HFI) scheme based on q-axis injection has been proposed. In addition, the changed-frequency injection has been adopted considering the effects of speed/load dependent slotting ripple current. Robust observed speed and position controllers have been added to enhance the sensorless control performance. For the SynRM basic driving control scheme, robust current control and adaptive commutation with minimized motor losses have been achieved that yield satisfactory driving performance up to the rated speed and load. Good EV driving performance has been demonstrated experimentally, including starting, dynamic, acceleration/deceleration, and reversible operations. In addition, the steady-state characteristics have been assessed, and the high efficiencies have been observed to be comparable to the standard drive.
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Zhang, Guangwei, and Akio Yamamoto. "Sensorless displacement estimation for an electrostatic film motor using driving currents." International Journal of Applied Electromagnetics and Mechanics 60, no. 2 (May 16, 2019): 247–61. http://dx.doi.org/10.3233/jae-180068.

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Suzdalenko, Alexander, Janis Zakis, Pavels Suskis, and Leonids Ribickis. "Bidirectional single-loop current sensorless control applied to NPC multi-level converter considering conduction losses." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 4 (December 1, 2020): 1945. http://dx.doi.org/10.11591/ijpeds.v11.i4.pp1945-1957.

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The current feedback is considered as unavoidable part of most control system driving power electronic converters. However, it is possible to eliminate the use of current sensor, if properly calculated volt-second balance is applied to input inductor. This paper describes the implementation of current sensorless control technique applied to neutral point clamped multi-level converter, where only voltage control-loop is used to stabilize internal capacitors voltage, while inductor’s current is shaped by means of current sensorless control block in both discontinuous and continuous current modes. The capacitor voltage balancing is implemented by means of delta-controller that selects alternative capacitor in respect to main switching scheme. Finally, the analytical study of proposed solution is verified with simulation results.
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Xue, Feng, and Guo Qing Shi. "Analysis of the Stability of Synchronous Motor Driving without Sensor." Advanced Materials Research 429 (January 2012): 259–66. http://dx.doi.org/10.4028/www.scientific.net/amr.429.259.

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The rotor’s position of brushless synchronous motor can only be got by windings’ currents, terminal voltages in the field where the sensors can not be installed. How to steadily drive the motor in the weak feedback becomes the key to the control method. Quantitative analysis of stability for control method is made for two kinds of motor which has trapezia wave and sine wave anti electromotive force， in which the concept of equivalent current bundle is brought forward. The computer simulation proves the results of analysis. Academic direction is made for the stable control of sensorless driving.
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Yu, Hsing Cheng, Chih Chiang Wang, Chau Shin Jang, Wen Yang Peng, and T. S. Liu. "Blowers of Vacuum Cleaners Utilizing Coreless and Sensorless Axial-Flux Motors with Edge-Wire Coils." Applied Mechanics and Materials 284-287 (January 2013): 1770–77. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.1770.

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Axial-flux motors (AFM) generally have higher torque and power densities, smaller volume and weight, larger diameter to length ratio, and compact construction for the same power level than radial-flux motors (RFM). Hence, AFM are attractive alternative to conventional RFM for applying in low torque and speed servo control systems. Additionally, magnetic Hall-effect sensors and commutation circuits are unsuitable for environment with high temperature and restricted space, so sensorless driving control method of AFM by detecting zero-crossing of back-EMF signals has been achieved. Furthermore, coreless design can reduce motor total weight, normal attractive force and torque pulsation and can increase efficiency of machines as compared with conventional design with cores. Thus, this study focuses on sensorless AFM design applying for blowers in vacuum cleaners to follow the concepts of axial-flux, edge-wire with high space-utilization factors, and stators without ferromagnetic cores. The closed-loop velocity controller designs by adopting proportional-integral-derivative (PID) and fuzzy logic control (FLC) algorithms have been demonstrated effectively for the design sensorless AFM of blowers in vacuum cleaners. As a result, the settling time of velocity closed-loop control methods can be converged within 1.0 second; i.e. the vacuum cleaners can switch and operate in various speeds with different operational environment rapidly. Therefore, the system characteristics and lifetime of the designed sensorless AFM have been enhanced and satisfied the demands of blowers to employ in vacuum cleaners.
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Dissertations / Theses on the topic "Sensorless driving"

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Thongam, Jogendra Singh. "Commande de haute performance sans capteur d'une machine asynchrone = High performance sensorless induction motor drive." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2006. http://theses.uqac.ca.

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Soviš, Jiří. "Bezsnímačové řízení střídavých motorů na platformě STM32." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442463.

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The thesis is focused on the issue of sensorless vector control of a synchronous motor with permanent magnets in the low-speed range. In the first part, there is a brief description of the synchronous motor and the necessary transformations for the application of vector control. This is followed by the overview of sensorless methods for position estimation by injecting a high-frequency harmonic signal. The practical part is devoted to the implementation of a control algorithm to develop kit STM32NUCLEO-L476RG, which is preceded by the identification of all engine parameters. As part of the implementation, a structure including current, speed and position control was designed. The functionality and robustness of the settings have been successfully tested due to the different inertia and load.
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Pijáček, Ondřej. "Univerzální řídicí jednotka pro BLDC motory." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-240819.

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This thesis describes the design of universal control unit for BLDC motor powered from airplane power distribution system of 28 V capable of driving motor up to 10 A. The maximal engine power is about 250 W. Important prerequisite is possibility of driving various motor size without needs of changing wiring board using only the configuration in the auxiliary memory unit. To control different motors is enough one unit with one program without any way to interfere to the unit itself.
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Shih, Meng-Han, and 石孟翰. "Sensorless Control for Brushless DC Motor Driving." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/rf44pt.

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碩士
義守大學
電子工程學系
107
In recent years, green policies have been continuously implemented for achieve sustainable development, and one of the biggest reasons is the energy issue. It is harmful to our living environment whether from the use of the oil, electricity to the nuclear energy. To solve the energy problem is nothing more than developing green energy or starting from energy saving. Among them, direct current motors (DC motors) play an indispensable role in future trends. DC motors can be used for using service robots, aircrafts, scooters, etc. and therefore they have a vital position. At the current stage, DC motors are basically divided into brushed DC motors and brushless DC motors (BLDC motors). However, brushed DC motors have gradually not been used because their power consumption and structural problems are hard to be improved. Most of the BLDC motors are controlled by the basis of Hall sensors, but the BLDC motors loaded with Hall sensors have higher cost and lower environmental adaptability. Therefore, the sensorless BLDC motors controlled by the basis of motor back electromotive force (back EMF) are derived from the former. The measurement of back EMF usually requires the use of a filter circuit and a comparison circuit. While the microprocessor clock is gradually accelerating and the functions are gradually being integrated, the microprocessor can integrate the measuring circuit of the back EMF, thereby reducing the circuit cost and the risk. This paper will use HT32F52352 to collect all the back-EMF circuits, and adjust the speed, torque compensation, blocked rotor test and status display. We will compare various control methods to propose the most suitable method for microprocessor-controlled sensorless BLDC motors.
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June-Horng, Ni, and 倪俊宏. "Servo Driving of Shaft-Sensorless Brushless DC Motor." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/20506959755221980029.

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碩士
大同工學院
電機工程研究所
81
The servo control of a brushless DC motor without the shaft position sensor that the back electromotive force is trapezoidal is discussed in this thesis. It contains the motor starting procedure, steady-state drive, and position control method. The implementation of this system is made by the software which is based on the microprocessor and a few hardware. The motor starts and accelerates at stand still according to a set slope. The rotor position is determined by the terminal voltage, and then offer the motor commutation sequence. The motor speed is adjusted by the average motor voltage just like the chopper control of a DC motor. The experimental result show that it just need a short dulation to reach the speed command when a load is added to the motor. Also, a brief field-orientation control method for the rotor to stop at the desire position without adding any other hardware is presented. It can be shown that the rotor will stop at the exact position in a pair of N-S pole.
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Chen, YuNian, and 陳昱年. "Design of Sensorless Bushless DC Motor and Driving Analysis." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/58557780632387492656.

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碩士
國立清華大學
動力機械工程學系
92
In brushless DC motors (BLDCM), power electronic switches are employed to replace the commutation devices of conventional DC motors; whereas Hall-Effect sensors are used for detecting the rotor position to trigger the switches. Hence, mechanical noises and brush maintenance are reduced to further prolong the motors life. Efficiency, highly relevant to the magnetic circuit design, is one of the key design indexes in BLDCM such that magnetic circuit optimization is critical during the design stage. More recently, sensorless driving has been a design trend due to the limitation of high temperature environment and available space for the Hall sensors. In this thesis, a simplified 1-D magnetic circuit analysis was done for screening the basic design parameters of a slotless-type BLDCM for the model airplane application. Then, 2-D finite-element analysis for the static magnetic field has been conducted to establish the mathematical models of BLDCM with details in exploration of sensitivity study for the dimensions and materials characteristics. Finally, the complete dynamic performances have been simulated with the help of a multi-domain simulation package including the basic principles for the sensorless driving scheme to meet the design objectives.
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Chern, Chun-Yu, and 陳俊宇. "Design and Implementation of High-Efficiency Driving Inverter for Sensorless DC Compressor." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/47685268627837784779.

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碩士
國立中山大學
電機工程學系研究所
98
The DSP is used as the control kernel in this thesis, proposing a method of sensorless and variable speed driving with current feedback for the DC compressor. By detecting the back electromotive force signals directly, the information of rotor position can be obtained, the commutation process and the speed estimation can also be achieved. Combining the current feedback method, the sinusoidal commutation with sensorless control makes the motor lower speed ripple and higher rotating efficiency. The results show that the sinusoidal commutation approach has the advantages of higher efficiency and less speed ripple as compared to the approaches of traditional-step commutation and six-step with current feedback by experimental setting.
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Chen, En-Ping, and 陳恩平. "An Advanced Sensorless Integrated Driving and Braking Control System for Electric Bikes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/07201077129843689429.

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碩士
國立中興大學
電機工程學系所
105
This thesis aims to develop a sensorless electromagnetic braking control system that uses Field Oriented Control (FOC) to integrate the driving and braking units into a single controller. With the application of anti-lock braking system (ABS), the braking effect can be maintained at the best performance. The control of drive and brake of permanent magnet brushless synchronous motors had been completed and applied to electric bikes. For the braking section, an electromagnetic reversely braking system having a larger braking force is developed which can change the switching state of the MOSFETs by alternating the duty cycle of pulse width modulation (PWM) to adjust the braking force. In addition, since the braking energy required for the electromagnetic braking system proposed here is related only to the back electromotive force (back-EMF) generated inside the motor, riders can determine the strength of the braking force by themselves or electric bike can be actually stopped at a higher speed for the safety design of driving. The proposed integrated sensorless driving and electromagnetic braking system have been practically realized, the results have been verified by experiments and the effect is good.
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Li, Cheng Da, and 李承達. "Position detection and driving of the shaft-sensorless permanent magnet synchronous motor." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/22521358368017799518.

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Huang, Xin-Chung, and 黃信中. "Shaft Sensorless Control of Switched Reluctance Motor and Its Application in Driving Fans." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/u642jk.

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碩士
國立臺北科技大學
電機工程系研究所
100
Switched reluctance motors (SRM) are running with reluctance force, the rotor and the stator are made of silicon steel. They have concentrated windings in stator slots, and do not require generating reluctance torque by a permanent magnet. There are advantages of ease for manufacturing, low cost and rugged. Therefore, they are particularly suitable for high-speed applications. In order to obtain good performance, the phase currents need to commutate with the rotor position. So we should install hall sensor, encoder or resolver to obtain rotor position information. However, if the motors are running in extreme environment such as high pressure, high temperature, wet or very high-speed operation, resulting in reliability problems of shaft position sensors. Therefore, in these applications should be no shaft position sensors to control the motors. We explored 8/6 poles SRM for the object and used a characteristics of peak phase currents method to detect the shaft position in high speed with the fan load. In addition to theoretical analysis, this paper also verifies the feasibility of this method by experiments.
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Books on the topic "Sensorless driving"

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Sensorless vector and direct torque control. Oxford: Oxford University Press, 1998.

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Book chapters on the topic "Sensorless driving"

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Diab, Ahmed A. Zaki, Abo-Hashima M. Al-Sayed, Hossam Hefnawy Abbas Mohammed, and Yehia Sayed Mohammed. "Sensorless Vector Control for Photovoltaic Array Fed Induction Motor Driving Pumping System." In SpringerBriefs in Electrical and Computer Engineering, 33–48. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2298-7_4.

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Shibayama, Masashi, Chi Zhu, and Wang Shui. "Development of an Add-on Driving Unit for Attendant Propelled Wheelchairs with Sensorless Power Assistance." In Intelligent Robotics and Applications, 168–78. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-43518-3_17.

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Gutiérrez, Pablo, José Antonio Domínguez, José Miguel Ruiz, and Santiago Lorenzo. "Sensorless Control for AC-Motor in Pumping Systems." In Energy Efficiency in Motor Driven Systems, 438–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55475-9_63.

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Abdelbaset, Adel, Yehia S. Mohamed, Abou-Hashema M. El-Sayed, and Alaa Eldin Hussein Abozeid Ahmed. "A Modified MRAS Observer for Sensorless Control of a Wind Driven DFIG Connected to Grid." In Wind Driven Doubly Fed Induction Generator, 21–39. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-70108-0_3.

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A. Guinee, Richard. "Novel Application of Fast Simulated Annealing Method in Brushless Motor Drive (BLMD) Dynamical Parameter Identification for Electric Vehicle Propulsion." In Self-driving Vehicles and Enabling Technologies [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97370.

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Permanent magnet brushless motor drives (BLMD) are extensively used in electric vehicle (EV) propulsion systems because of their high power and torque to weight ratio, virtually maintenance free operation with precision control of torque, speed and position. An accurate dynamical parameter identification strategy is an essential feature in the adaptive control of such BLMD-EV systems where sensorless current feedback is employed for reliable torque control, with multi-modal penalty cost surfaces, in EV high performance tracking and target ranging. Application of the classical Powell Conjugate Direction optimization method is first discussed and its inaccuracy in dynamical parameter identification is illustrated for multimodal cost surfaces. This is used for comparison with the more accurate Fast Simulated Annealing/Diffusion (FSD) method, presented here, in terms of the returned parameter estimates. Details of the FSD development and application to the BLMD parameter estimation problem based on the minimum quantized parameter step sizes from noise considerations are provided. The accuracy of global parameter convergence estimates returned, cost function evaluation and the algorithm run time are presented. Validation of the FSD identification strategy is provided by excellent correlation of BLMD model simulation trace coherence with experimental test data at the optimal estimates and from cost surface simulation.
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Susperregui, Ana, Gerardo Tapia, and M. Itsaso. "Sensorless First- and Second-Order Sliding-Mode Control of a Wind Turbine-Driven Doubly-Fed Induction Generator." In Sliding Mode Control. InTech, 2011. http://dx.doi.org/10.5772/15188.

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Conference papers on the topic "Sensorless driving"

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Betai, Jay Dipak, and Hong Zhou. "Solar Tracking Using Linear Actuator." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23607.

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Abstract Solar trackers make solar panels perpendicular to solar ray to enhance solar power reaping. The relative motion between Sun and Earth has two degrees of freedom. Sun travels from east to west during daytime and also moves north and south due to Earth’s tilt. However, Sun’s daily north-south move is much smaller than its east-west move. Sensor-based solar trackers make solar panels perpendicular to solar ray based on sensor information. Although the existing sensor-based solar trackers increase solar power reaping from solar panels significantly, they also consume considerable power by driving solar trackers. Sensorless solar trackers make solar panels perpendicular to solar ray based on calculated solar location. The performance of sensorless solar trackers is not affected by bad weather. This paper is on sensorless solar trackers. Single-axis solar trackers have one degree of freedom solar tracking motion. They can catch Sun’s daily east-west movement effectively. The Sun’s small north-south movement can be covered for single-axis solar trackers by monthly or seasonal adjustment of their orientations. This research is focused on single-axis sensorless solar trackers that are driven by linear actuators. The advantages of linear actuator driven solar trackers are their self-locking function and high load carrying capacity. Their challenges include limited solar panel motion range, potential interference between an oscillating solar panel and its fixed supporting ground link, and high motor power consumption for solar tracking. The research of this paper is motivated by surmounting the challenges facing sensorless single-axis linear actuator driven solar trackers. In this research, linear actuator driven solar trackers will be designed and analyzed. The models of the designed solar trackers will be developed. The kinematic and dynamic performances of the modeled solar trackers will be analyzed and simulated. The results of this research will provide some guidelines for developing linear actuator driven solar trackers.
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Abdelwanis, Mohamed I., and F. Selim. "A sensorless six-phase induction motor driving a centrifugal pump system." In 2017 Nineteenth International Middle East Power Systems Conference (MEPCON). IEEE, 2017. http://dx.doi.org/10.1109/mepcon.2017.8301190.

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Harihara, Parasuram P., and Alexander G. Parlos. "Sensorless Detection of Cavitation in Centrifugal Pumps." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14655.

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Analysis of electrical signatures has been in use for some time for estimating the condition of induction motors, by extracting spectral indicators from motor current waveforms. In most applications, motors are used to drive dynamic loads, such as pumps, fans, and blowers, by means of power transmission devices, such as belts, couplers, gear-boxes. Failure of either the electric motors or the driven loads is associated with operational disruption. The large costs associated with the resulting idle equipment and personnel can often be avoided if the degradation is detected in its early stages prior to reaching failure conditions. Hence the need arises for cost-effective detection schemes not only for assessing the condition of the motor but also of the driven load. This prompts one to consider approaches that use no add-on sensors, in order to avoid any reduction in overall system reliability and increased costs. This paper presents an experimentally demonstrated sensorless approach to detecting varying levels of cavitation in centrifugal pumps. The proposed approach is sensorless in the sense that no mechanical sensors are required on either the pump or the motor driving the pump. Rather, onset of pump cavitation is detected using only the line voltages and phase currents of the electric motor driving the pump. Moreover, most industrial motor switchgear are equipped with potential transformers and current transformers which can be used to measure the motor voltages and currents. The developed fault detection scheme is insensitive to electric power supply and mechanical load variations. Furthermore, it does not require a priori knowledge of a motor or pump model or any detailed motor or pump design parameters; a model of the system is adaptively estimated on-line. The developed detection algorithm has been tested on data collected from a centrifugal pump connected to a 3 φ, 3 hp induction motor. Several cavitation levels are staged with increased severity. In addition to these staged pump faults, extensive experiments are also conducted to test the false alarm performance of the algorithm. Results from these experiments allow us to offer the conclusion that for the cases under consideration, the proposed model-based detection scheme reveals cavitation detection times that are comparable to those obtained from vibration analysis with a detection threshold that is significantly lower than used in industrial practice.
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Harihara, Parasuram P., and Alexander G. Parlos. "Sensorless Detection of Impeller Cracks in Motor Driven Centrifugal Pumps." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66273.

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Electrical signal analysis has been in use for quite some time to detect and diagnose induction motor faults. In most industrial applications, induction motors are used to drive dynamic loads such as pumps, compressors, fans, etc. Failure of either the motors or the driven loads results in an unscheduled downtime which in turn leads to loss of production. These operational disruptions could be avoided if the equipment degradation is detected in its early stages prior to reaching catastrophic failure conditions. Hence the need arises for cost-effective detection schemes not only for assessing the condition of electric motors but also the driven loads. This paper presents an experimentally demonstrated sensor-less approach to detect impeller cracks in centrifugal pumps. The proposed method is sensorless in the sense that it does not use any mechanical and/or process pump sensors to detect impeller faults. Rather motor electrical measurements are used for the intended purpose. Mechanical sensors have high costs and low reliability, and frequently fail more often than the system being monitored. Hence add-on mechanical sensors reduce the overall system reliability. In this study, fault detection is accomplished using only the line voltages and phase currents of the electric motor driving the pump. The developed detection algorithm is insensitive to electrical power supply and load variations. Furthermore, it does not require prior knowledge of either a motor or the pump model or design parameters and hence the detection algorithm can be easily ported to motor-pump systems of varying manufacturers and sizes. The proposed fault detection scheme has been tested on data collected from a centrifugal pump driven by a 3-φ, 3 hp induction motor. Several cracks on the pump impeller are staged to validate the detection effectiveness of the proposed scheme and compare its effectiveness with respect to continuous vibration monitoring. In addition to these staged faults, experiments are also conducted to demonstrate the prevention of false alarms by the algorithm. Results from all of these experiments are presented to substantiate the performance of the sensorless pump fault detection scheme.
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Hata, Katsuhiro, Kensuke Hanajiri, Takehiro Imura, Hiroshi Fujimoto, Yoichi Hori, Motoki Sato, and Daisuke Gunji. "Driving Test Evaluation of Sensorless Vehicle Detection Method for In-motion Wireless Power Transfer." In 2018 International Power Electronics Conference (IPEC-Niigata 2018-ECCE Asia). IEEE, 2018. http://dx.doi.org/10.23919/ipec.2018.8508025.

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Hoffstadt, Thorben, and Jürgen Maas. "Sensorless Force Control Interface for DEAP Stack-Actuators." In ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/smasis2015-9044.

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Transducers based on dielectric electroactive polymers (DEAP) offer an attractive balance of work density and electromechanical efficiency. For example in automation and haptic applications, especially multilayer transducers are used to scale up their absolute deformation and force. Depending on the application different transducer controls have to be realized to match the specifications of the particular application. However, analogous to conventional electromechanical drive systems an inner sensor-less force control can be realized for DEAP transducers, too. For this force control the nonlinear relations between voltage and electrostatic pressure as well as the electromechanical coupling have to be considered. The resulting open-loop force control can be used for superimposed motion controls, such as position, vibration and impedance controls. Therefore, within this contribution the authors propose a model-based feedforward force control based on an overall model of the transducer that does not require any force measurement. Finally, the derived open-loop force control interface is experimentally validated using in-house developed DEAP stack-transducers and driving power electronics.
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Parlos, Alexander G., Kyusung Kim, and Raj M. Bharadwaj. "Sensorless Early Detection of Mechanical Faults: Developments in Smart Rotating Machines." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21750.

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Abstract Practical early fault detection and diagnosis systems must exhibit high level of detection accuracy and while exhibiting acceptably low false alarm rates. Such designs must have applicability to a large class of machines, require installation of no additional sensors, and require minimal detailed information regarding the specific machine design. Electromechanical systems, such as electric motors driving dynamic loads like pumps and compressors, often develop incipient failures that result in downtime. There is a large number of such failure modes, with a large majority being of mechanical nature. The precise signatures of these failure modes depend on numerous machine-specific factors, including variations in the electric power supply and driven load. In this paper the development and experimental demonstration of a sensorless, detection and diagnosis system is presented for incipient machine faults. The developed fault detection and diagnosis system uses recent developments in dynamic recurrent neural networks in implementing an empirical model-based approach, and multi-resolution signal processing for extracting fault information from transient signals. The signals used by the system are only the multi-phase motor current and voltage sensors, whereas the transient mechanical speed is estimated from these measurements using a recently developed speed filter. The effectiveness of the fault diagnosis system is demonstrated by detecting stator, rotor and bearing failures at early stages of development and during different levels of deterioration. Experimental test results from small machines, 2.2 kW, and large machines, 373 kW and 597 kW, are presented demonstrating the effectiveness of the proposed approach. Furthermore, the ability of the diagnosis system to discriminate between false alarms and actual incipient failure conditions is demonstrated.
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Yang, H. S., M. S. Rho, H. Y. Park, J. H. Choi, Y. B. Cha, J. H. Kwon, C. H. Yang, and J. B. Hwang. "Permanent Magnet High Speed Starter/Generator System Development Directly Coupled to Gas Turbine Engine for Mobile Auxiliary Power Unit." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53165.

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This paper shows that high-speed starter/generator system is more efficient for gas turbine engine for mobile auxiliary power unit. The system is rated at 25kW, 325Vdc, 60krpm. The system also provides 4kw to start the 100kW engine. The system consists of a high speed machine directly coupled to the gas turbine engine, a power control unit (PCU), and an electronics controller. The PCU is consist of boost converter that boost from 24V (Battery of Vehicle) to 235V for driving high-speed motor, inverter drive PMSM (Permanent Magnet Synchronous Motor), and buck converter drop the voltage to 28V. For PMSM driving the system applied SVPWM (Space Vector Pulse Width Modulation), sensorless algorithm. And then, to supply optimized power, “Constant Power Control Algorithm” is applied. For the system development, electromagnetic analysis, structure analysis, rotor dynamic analysis, and heat transfer analysis are done. After manufacturing, we have tested the system many times to produce verified performance.
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Zhu, Xinyi, Zhiliang Zhang, Zhibin Li, Ke Xu, Dongdong Ye, Xiaoyong Ren, and Qianhong Chen. "A Sensorless Synchronous Rectification Driving Scheme in 1-kV Input 1-MHz GaN LLC Converters with Matrix Transformers*." In 2020 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2020. http://dx.doi.org/10.1109/apec39645.2020.9124534.

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Yamamoto, Shu, and Hideaki Hirahara. "Effect of Parameter Tuning on Driving Performance of a Universal-Sensorless-Vector-Controlled Closed-Slot Cage Induction Motor." In 2019 22nd International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2019. http://dx.doi.org/10.1109/icems.2019.8921692.

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