Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941776
Lisong He, Dongliang Ke, Jinsong Kang, Fengxiang Wang
Among all the different fault types in permanent magnet synchronous machines (PMSMs), the stator inter-turn short circuit fault is one of the most severe, which can jeopardize the safety of PMSM drive systems easily. This article proposes a diagnosis method of inter-turn short circuit fault for PMSMs based on the duration of the space vectors via finite control set model predictive control (FCS-MPC) strategy. The method is performed by evaluating whether the duration of different space vectors has changed or not, following that, the specific changing space vectors are used to locate the phase sequence where the fault happened. Furthermore, this study proposes that the observed space vector distribution characteristics can be qualitatively explained by closed-loop control for the suppression of inter-turn short circuit fault. The prominent advantage of the proposed method is that no additional sensors are necessary, the little burden is added to the microcontroller and it also works well for variable frequency control. The results of the simulation verify the effectiveness of the proposed diagnosis method to detect and locate inter-turn short circuit faults.
{"title":"Inter-Turn Short Circuit Fault Diagnosis for PMSM Predictive Control System Based on Duration-Space-Vector Technique","authors":"Lisong He, Dongliang Ke, Jinsong Kang, Fengxiang Wang","doi":"10.1109/ITECAsia-Pacific56316.2022.9941776","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941776","url":null,"abstract":"Among all the different fault types in permanent magnet synchronous machines (PMSMs), the stator inter-turn short circuit fault is one of the most severe, which can jeopardize the safety of PMSM drive systems easily. This article proposes a diagnosis method of inter-turn short circuit fault for PMSMs based on the duration of the space vectors via finite control set model predictive control (FCS-MPC) strategy. The method is performed by evaluating whether the duration of different space vectors has changed or not, following that, the specific changing space vectors are used to locate the phase sequence where the fault happened. Furthermore, this study proposes that the observed space vector distribution characteristics can be qualitatively explained by closed-loop control for the suppression of inter-turn short circuit fault. The prominent advantage of the proposed method is that no additional sensors are necessary, the little burden is added to the microcontroller and it also works well for variable frequency control. The results of the simulation verify the effectiveness of the proposed diagnosis method to detect and locate inter-turn short circuit faults.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"55 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85018490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9942026
Lianjie Wang, Jiazhan Dong, Wenjin Sun, Chushan Li, He Xu, Wuhua Li
With the rapid development of wide bandgap (WBG) power semiconductors, SiC and Si hybrid inverter has received high attention in both academic and industry due to their high switching frequency, low switching loss but appropriate cost. In this paper, a Three-Phase-Module-Parallel (TPMP) SiC & Si hybrid inverter targeted for low voltage applications is proposed, which consists of Si and SiC three-phase power modules. With the proposed coordinated current compensating modulation scheme, the Si IGBT three-phase module enables its low-frequency switching and takes major parts of active power, while the SiC module operates at high frequency to just compensate for the current ripple of Si IGBT modules. This proposed inverter has a lower cost since the power rating of the SiC converter only has 1/3 of the rated power. On the other hand, a smaller filter design is realized since the equivalent switching frequency is high. The proposed topology and modulation scheme are verified by simulation.
随着宽带隙功率半导体技术的迅速发展，SiC和Si混合逆变器以其开关频率高、开关损耗低、成本适中等优点受到了学术界和工业界的高度重视。本文提出了一种针对低压应用的三相模块并联(TPMP) SiC & Si混合逆变器，该逆变器由Si和SiC三相功率模块组成。采用本文提出的协调电流补偿调制方案，硅IGBT三相模块实现低频开关，占有功功率的主要部分，而SiC模块工作在高频，只补偿硅IGBT模块的电流纹波。该逆变器的成本较低，因为SiC转换器的额定功率仅为额定功率的1/3。另一方面，由于等效开关频率高，实现了更小的滤波器设计。仿真验证了所提出的拓扑结构和调制方案。
{"title":"A Three-Phase-Module-Parallel Si & SiC Hybrid Inverter with Smaller Filter Size and Low Cost","authors":"Lianjie Wang, Jiazhan Dong, Wenjin Sun, Chushan Li, He Xu, Wuhua Li","doi":"10.1109/ITECAsia-Pacific56316.2022.9942026","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942026","url":null,"abstract":"With the rapid development of wide bandgap (WBG) power semiconductors, SiC and Si hybrid inverter has received high attention in both academic and industry due to their high switching frequency, low switching loss but appropriate cost. In this paper, a Three-Phase-Module-Parallel (TPMP) SiC & Si hybrid inverter targeted for low voltage applications is proposed, which consists of Si and SiC three-phase power modules. With the proposed coordinated current compensating modulation scheme, the Si IGBT three-phase module enables its low-frequency switching and takes major parts of active power, while the SiC module operates at high frequency to just compensate for the current ripple of Si IGBT modules. This proposed inverter has a lower cost since the power rating of the SiC converter only has 1/3 of the rated power. On the other hand, a smaller filter design is realized since the equivalent switching frequency is high. The proposed topology and modulation scheme are verified by simulation.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"6 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91022691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9942048
Pan Liu, Yinru Bai, Xuping Wang, Shuqing Tan
In order to reduce the 5th and 7th harmonic winding coefficients of the fractional-slot permanent magnet synchronous motor(PMSM) with few poles, and at the same time weaken the cogging torque, a stator slotting structure with unequal tooth tip width combined with auxiliary windings is proposed. For the motor winding coefficient, it is firstly proposed to put auxiliary windings with different turns in the same direction in the motor armature teeth to improve the fundamental winding coefficient and weaken the 5th and 7th harmonic winding coefficients. On this basis, the cogging torque expression obtained by the energy method is used to analyze the auxiliary tooth tip angle by the Fourier decomposition method. The correctness of the theoretical derivation of the winding coefficient is verified by the air-gap flux density and no-load back EMF simulated by the finite element. Finally, the cogging torque of the motor and the equal-tooth motor structure are simulated and compared, and the results show that the effect of the motor to weaken the cogging torque is remarkable.
{"title":"Research on Winding Coefficient and Cogging Torque of Few-pole Fractional Slot Permanent Magnet Synchronous Motor","authors":"Pan Liu, Yinru Bai, Xuping Wang, Shuqing Tan","doi":"10.1109/ITECAsia-Pacific56316.2022.9942048","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942048","url":null,"abstract":"In order to reduce the 5th and 7th harmonic winding coefficients of the fractional-slot permanent magnet synchronous motor(PMSM) with few poles, and at the same time weaken the cogging torque, a stator slotting structure with unequal tooth tip width combined with auxiliary windings is proposed. For the motor winding coefficient, it is firstly proposed to put auxiliary windings with different turns in the same direction in the motor armature teeth to improve the fundamental winding coefficient and weaken the 5th and 7th harmonic winding coefficients. On this basis, the cogging torque expression obtained by the energy method is used to analyze the auxiliary tooth tip angle by the Fourier decomposition method. The correctness of the theoretical derivation of the winding coefficient is verified by the air-gap flux density and no-load back EMF simulated by the finite element. Finally, the cogging torque of the motor and the equal-tooth motor structure are simulated and compared, and the results show that the effect of the motor to weaken the cogging torque is remarkable.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"26 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91125759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9942142
Yao Wei, Shuaicheng Men, Yanjun Wei, H. Qi, Fengxiang Wang
To overcome the performance limitation caused by the unsuitable inertia, a model-free predictive current control (MF-PCC) strategy with adjustable low inertia is proposed in this paper and applied to the permanent magnet synchronous motor (PMSM) driving system of the electrical vehicle (EV). An extended state observer (ESO) with an inertia ratio part is designed to estimate the disturbance which is used to adjust the inertia and build the ultra-local model at the same time to achieve better control performance without any physical parameters. The bode diagram and experimental validations demonstrate the effectiveness of the proposed method, as well as the advantages including improved dynamics, better stator current quality, and suitable robustness compared to the conventional MF-PCC strategy based on the ultra-local model under the physical parameter mismatch conditions.
{"title":"A Model-Free Predictive Current Control for PMSM Driving System of EV with Adjustable Low Inertia","authors":"Yao Wei, Shuaicheng Men, Yanjun Wei, H. Qi, Fengxiang Wang","doi":"10.1109/ITECAsia-Pacific56316.2022.9942142","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942142","url":null,"abstract":"To overcome the performance limitation caused by the unsuitable inertia, a model-free predictive current control (MF-PCC) strategy with adjustable low inertia is proposed in this paper and applied to the permanent magnet synchronous motor (PMSM) driving system of the electrical vehicle (EV). An extended state observer (ESO) with an inertia ratio part is designed to estimate the disturbance which is used to adjust the inertia and build the ultra-local model at the same time to achieve better control performance without any physical parameters. The bode diagram and experimental validations demonstrate the effectiveness of the proposed method, as well as the advantages including improved dynamics, better stator current quality, and suitable robustness compared to the conventional MF-PCC strategy based on the ultra-local model under the physical parameter mismatch conditions.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"1 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89241508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941761
A. A. Hadipranoto, Grace Firsta Lukman, Jin-Woo Ahn
Switched reluctance motors are becoming increasingly attractive in various fields and for various applications including for electric vehicles. It is controlled by activating and deactivating the phases of the motor during the positive inductance slope of each phase. A simple way to do this is to excite each phase according to the edges of sensor outputs aligned to the phases. However this method is very crude and results in a fixed dwell angle. This fixed dwell angle results in unusual torque waveforms which may lead to a reduction in overall torque. This paper discusses the control of a 2-phase 4/2 SRM used for electric superchargers and introduces a simple novel control method based on sensor excitation and current threshold control. This includes a self-starting procedure and also a compensation mechanism adapted from the simple sensor-based excitation. Simulations and experiments were done to verify the proposed methods.
{"title":"Current Threshold Scheme for Torque Ripple Reduction of a 4/2 Switched Reluctance Motor","authors":"A. A. Hadipranoto, Grace Firsta Lukman, Jin-Woo Ahn","doi":"10.1109/ITECAsia-Pacific56316.2022.9941761","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941761","url":null,"abstract":"Switched reluctance motors are becoming increasingly attractive in various fields and for various applications including for electric vehicles. It is controlled by activating and deactivating the phases of the motor during the positive inductance slope of each phase. A simple way to do this is to excite each phase according to the edges of sensor outputs aligned to the phases. However this method is very crude and results in a fixed dwell angle. This fixed dwell angle results in unusual torque waveforms which may lead to a reduction in overall torque. This paper discusses the control of a 2-phase 4/2 SRM used for electric superchargers and introduces a simple novel control method based on sensor excitation and current threshold control. This includes a self-starting procedure and also a compensation mechanism adapted from the simple sensor-based excitation. Simulations and experiments were done to verify the proposed methods.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"56 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79829137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
With the increasing operating frequency, magnetic components and their design is considered as a significant part to achieve high power density and high efficiency in today's power electronics converters. Accurate losses of these components under practical excitation conditions are still difficult to determine. Therefore, it's crucial to directly measure the loss of these components for loss estimation and further optimization. In this paper, a loss measurement approach of magnetic power components is proposed. To emulate many power electronics relevant waveforms, the excitation source is constructed in a full-bridge topology with SiC MOSFET modules. To improve measuring accuracy, the selection of current probes is discussed then. Moreover, a time delay correction method ensuring precise compensation is implemented in this paper. Finally, to verify the measurement results, an additional dual-inductor experiment is proposed.
{"title":"A Loss Measurement Approach of Power Magnetic Components under Practical Power Electronics Conditions","authors":"He Xu, Jiazhan Dong, Chushan Li, Yuanhong Wang, Ying Mei, Jingkui Shi, Menglian Zhao","doi":"10.1109/ITECAsia-Pacific56316.2022.9941831","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941831","url":null,"abstract":"With the increasing operating frequency, magnetic components and their design is considered as a significant part to achieve high power density and high efficiency in today's power electronics converters. Accurate losses of these components under practical excitation conditions are still difficult to determine. Therefore, it's crucial to directly measure the loss of these components for loss estimation and further optimization. In this paper, a loss measurement approach of magnetic power components is proposed. To emulate many power electronics relevant waveforms, the excitation source is constructed in a full-bridge topology with SiC MOSFET modules. To improve measuring accuracy, the selection of current probes is discussed then. Moreover, a time delay correction method ensuring precise compensation is implemented in this paper. Finally, to verify the measurement results, an additional dual-inductor experiment is proposed.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"72 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80242100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941837
Guisheng Wang, Wei Li, Qingbo Sheng, Lu Fan, Xiaohan Zhang
The power consumption of induction motor and its system is the main force of industrial power consumption, which has great energy-saving potential, and it is of great significance for energy saving and emission reduction. In order carry out scientific and reasonable energy-saving transformation of the motor system, the operation efficiency of the motor system must be estimated in real time and online. In view of the limitations of the previous motor efficiency detection, this paper proposes a non-intervention motor efficiency detection method. This method calculates the speed and torque of the motor on-line based on the improved rotor flux model reference adaptive method (MRAS) and stator flux method, and then obtains the output power of the motor. The simulation and experiment results show that the proposed method can effectively estimate the motor efficiency, and the estimated efficiency has a good follow-up to the actual efficiency of the motor under sudden load.
{"title":"Online Efficiency Prediction of Induction Motor using Model Reference Adaptvie Method","authors":"Guisheng Wang, Wei Li, Qingbo Sheng, Lu Fan, Xiaohan Zhang","doi":"10.1109/ITECAsia-Pacific56316.2022.9941837","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941837","url":null,"abstract":"The power consumption of induction motor and its system is the main force of industrial power consumption, which has great energy-saving potential, and it is of great significance for energy saving and emission reduction. In order carry out scientific and reasonable energy-saving transformation of the motor system, the operation efficiency of the motor system must be estimated in real time and online. In view of the limitations of the previous motor efficiency detection, this paper proposes a non-intervention motor efficiency detection method. This method calculates the speed and torque of the motor on-line based on the improved rotor flux model reference adaptive method (MRAS) and stator flux method, and then obtains the output power of the motor. The simulation and experiment results show that the proposed method can effectively estimate the motor efficiency, and the estimated efficiency has a good follow-up to the actual efficiency of the motor under sudden load.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77296213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9942016
Zekai Lyu, Lijian Wu, Youtong Fang
The LC filter can be added between pulse width modulation (PWM) inverter and permanent-magnet synchronous machine (PMSM) to reduce the insulation stress and current harmonics. However, the LCL resonance can threaten the stability of the system. This paper focuses on the passive damping method for LC-equipped PMSM drive system to suppress the resonance without the need of additional sensors or changes in the control software. The inherent damping characteristic of the drive system is derived. Then, two kinds of passive damping schemes are investigated and compared. The analysis and design are validated with simulation results.
{"title":"Analysis and Design of Passive Damping for LC-Equipped Permanent-Magnet Synchronous Machine Drive System","authors":"Zekai Lyu, Lijian Wu, Youtong Fang","doi":"10.1109/ITECAsia-Pacific56316.2022.9942016","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9942016","url":null,"abstract":"The LC filter can be added between pulse width modulation (PWM) inverter and permanent-magnet synchronous machine (PMSM) to reduce the insulation stress and current harmonics. However, the LCL resonance can threaten the stability of the system. This paper focuses on the passive damping method for LC-equipped PMSM drive system to suppress the resonance without the need of additional sensors or changes in the control software. The inherent damping characteristic of the drive system is derived. Then, two kinds of passive damping schemes are investigated and compared. The analysis and design are validated with simulation results.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"20 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72815886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The conventional (sliding mode observer) SMO employed in the sensorless control for the permanent magnet synchronous machine (PMSM) has the problems of chattering phenomena and phase delay, which always results in a large error between the estimation and actual values of the rotor speed and position. Thus, this paper proposes an improved SMO based on fuzzy logic controller (FLC) and dual second-order generalized integrator-frequency-locked loop (DSOGI-FLL) structure. The FLC is used to adjust the parameters of the SMO to improve the adaptive ability of the system and reduce the chattering phenomena. At the same time, in order to reduce the adverse effects from LPF, DSOGI-FLL is used to accurately extract the back electromotive force (back-EMF) and effectively eliminate the high-order harmonic components. The methods are verified by simulation in Matlab /Simulink and compared with the conventional SMO, the results show that the improved SMO has better performance.
{"title":"A New Composite Sensorless Control Strategy for PMSM Used in Electric Vehicle","authors":"Jiwei Huang, Guangyu Qi, Xinkai Zhu, Yucai Wu, Yonggang Li, Yuling He","doi":"10.1109/ITECAsia-Pacific56316.2022.9941785","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941785","url":null,"abstract":"The conventional (sliding mode observer) SMO employed in the sensorless control for the permanent magnet synchronous machine (PMSM) has the problems of chattering phenomena and phase delay, which always results in a large error between the estimation and actual values of the rotor speed and position. Thus, this paper proposes an improved SMO based on fuzzy logic controller (FLC) and dual second-order generalized integrator-frequency-locked loop (DSOGI-FLL) structure. The FLC is used to adjust the parameters of the SMO to improve the adaptive ability of the system and reduce the chattering phenomena. At the same time, in order to reduce the adverse effects from LPF, DSOGI-FLL is used to accurately extract the back electromotive force (back-EMF) and effectively eliminate the high-order harmonic components. The methods are verified by simulation in Matlab /Simulink and compared with the conventional SMO, the results show that the improved SMO has better performance.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"12 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78790817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.1109/ITECAsia-Pacific56316.2022.9941839
Mengmeng Cui, T. Zou, Dawei Li, D. Gerada, R. Qu, C. Gerada
Detailed airgap permeance information is of great importance for analyzing the operation principle and optimizing the electromagnetic field distribution of an electric machine with unconventional topology. So far, analytical approaches upon calculating airgap permeance have been adopted in most existing research work, while corresponding simulation-based tools have rarely been reported. In this paper, a new concept of airgap permeance calculation developed from numerical finite element tools is presented. Based on similarity of magnetic field and electric field, the airgap permeance distribution of electrical machines with various topologies can be predicted rapidly through finite element analysis (FEA) in electrostatic field. The FEA-based airgap permeance distribution can be regarded as an effective approach to validate corresponding results calculated from complex mathematical derivation. Furthermore, the characteristics of working airgap flux density harmonics introduced by magnetomotive force (MMF) of stator or rotor could be more intuitively investigated. Based on case studies of several typical machine topologies, the proposed FEA-based method will be proved of featuring wide feasibility, i.e., capable of covering stator slotting effect, rotor saliency as well as dual side saliency effect. Finally, the reasonability of the permeance calculation method is verified based on a further proposed homopolar topology within electromagnetic FEA.
{"title":"A Novel Airgap Permeance Modeling Approach for Magnetic Field Analysis of Electrical Machines Based on Electrostatic FEA","authors":"Mengmeng Cui, T. Zou, Dawei Li, D. Gerada, R. Qu, C. Gerada","doi":"10.1109/ITECAsia-Pacific56316.2022.9941839","DOIUrl":"https://doi.org/10.1109/ITECAsia-Pacific56316.2022.9941839","url":null,"abstract":"Detailed airgap permeance information is of great importance for analyzing the operation principle and optimizing the electromagnetic field distribution of an electric machine with unconventional topology. So far, analytical approaches upon calculating airgap permeance have been adopted in most existing research work, while corresponding simulation-based tools have rarely been reported. In this paper, a new concept of airgap permeance calculation developed from numerical finite element tools is presented. Based on similarity of magnetic field and electric field, the airgap permeance distribution of electrical machines with various topologies can be predicted rapidly through finite element analysis (FEA) in electrostatic field. The FEA-based airgap permeance distribution can be regarded as an effective approach to validate corresponding results calculated from complex mathematical derivation. Furthermore, the characteristics of working airgap flux density harmonics introduced by magnetomotive force (MMF) of stator or rotor could be more intuitively investigated. Based on case studies of several typical machine topologies, the proposed FEA-based method will be proved of featuring wide feasibility, i.e., capable of covering stator slotting effect, rotor saliency as well as dual side saliency effect. Finally, the reasonability of the permeance calculation method is verified based on a further proposed homopolar topology within electromagnetic FEA.","PeriodicalId":45126,"journal":{"name":"Asia-Pacific Journal-Japan Focus","volume":"153 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74911626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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