Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449588
Xuliang Yao, Shengqi Huang, Jingfang Wang, Feiyang Zhang, Yujian Wang, He Ma
Due to low cost and high reliability, the Hall-effect sensor is adopted as an alternative to the encoder. This paper presents a pseudo sensorless deadbeat predictive current control (PSDBPCC) method to improve the estimation accuracy of the rotor speed and position with Hall-effect sensors. In this method the output signals of the Hall-effect sensors are transformed to the Hall vector which contains high order harmonics by Clark transformation. The adaptive vectorial filter (AVF) is introduced to extract the fundamental waves of the Hall vector. The rotor speed and position are estimated from the fundamental waves with an improved phase locked loop (PLL) structure. Compared with the conventional method, the proposed method has higher estimation accuracy in steady state and better dynamic tracking performance. The experimental results verify the effectiveness of the proposed method.
{"title":"Pseudo Sensorless Deadbeat Predictive Current Control for PMSM Drives With Hall-Effect Sensors","authors":"Xuliang Yao, Shengqi Huang, Jingfang Wang, Feiyang Zhang, Yujian Wang, He Ma","doi":"10.1109/IEMDC47953.2021.9449588","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449588","url":null,"abstract":"Due to low cost and high reliability, the Hall-effect sensor is adopted as an alternative to the encoder. This paper presents a pseudo sensorless deadbeat predictive current control (PSDBPCC) method to improve the estimation accuracy of the rotor speed and position with Hall-effect sensors. In this method the output signals of the Hall-effect sensors are transformed to the Hall vector which contains high order harmonics by Clark transformation. The adaptive vectorial filter (AVF) is introduced to extract the fundamental waves of the Hall vector. The rotor speed and position are estimated from the fundamental waves with an improved phase locked loop (PLL) structure. Compared with the conventional method, the proposed method has higher estimation accuracy in steady state and better dynamic tracking performance. The experimental results verify the effectiveness of the proposed method.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130840393","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449491
H. Won, Yang-Ki Hong, Jonathan Platt, Minyeong Choi, Briana Bryant, Seungdeog Choi
This paper presents a novel stator-shifted six-phase fractional-slot concentrated winding ferrite spoke-type permanent magnet synchronous machine for an electric truck application. The proposed motor consists of a stator with dual three-phase windings that are 75 degrees apart and a rotor with a ferrite permanent magnet in spoke configuration. To further reduce the torque ripple, one circular void and notch are introduced on the stator and rotor, respectively. The simulation results show that the proposed motor exhibits 138% lower torque ripple, 108% lower back-EMF at 3000 rpm, and 95.5% higher maximum speed with a maximum torque of 2150 Nm and no demagnetization, compared to three-phase integrated-slot distributed winding NdFeB V-type PMSM of Prius 2010.
{"title":"Six-phase Fractional-slot Concentrated Winding Ferrite Spoke-type Permanent Magnet Synchronous Motor for Electric Truck","authors":"H. Won, Yang-Ki Hong, Jonathan Platt, Minyeong Choi, Briana Bryant, Seungdeog Choi","doi":"10.1109/IEMDC47953.2021.9449491","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449491","url":null,"abstract":"This paper presents a novel stator-shifted six-phase fractional-slot concentrated winding ferrite spoke-type permanent magnet synchronous machine for an electric truck application. The proposed motor consists of a stator with dual three-phase windings that are 75 degrees apart and a rotor with a ferrite permanent magnet in spoke configuration. To further reduce the torque ripple, one circular void and notch are introduced on the stator and rotor, respectively. The simulation results show that the proposed motor exhibits 138% lower torque ripple, 108% lower back-EMF at 3000 rpm, and 95.5% higher maximum speed with a maximum torque of 2150 Nm and no demagnetization, compared to three-phase integrated-slot distributed winding NdFeB V-type PMSM of Prius 2010.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130938009","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449587
Yang Liang, D. Liang, S. Jia, Shuaijun Chu, Hao Wang, Yongtao Liang
The driving electric machine of high-power flywheel energy storage system (FESS) has the characteristics of high fundamental frequency and low inductance, which lead to high current harmonic content and increases the loss of FESS. To suppress the current harmonics, a compound control scheme is proposed for an innovative hybrid converter in this paper. The mathematical model of the hybrid converter is analyzed and divided into two parts: main voltage source converter (MVSC) and filtering voltage source converter (FVSC). According to the characteristics of MVSC and FVSC in output power and switching frequency, two different regular sampling strategies are described and applied. On this basis, the exact MVSC model in discrete time-domain is established, and the current controller with complex vector decoupling is designed. Similarly, a current controller with feedback decoupling is designed for FVSC in the continuous time-domain. Both the current controllers have excellent robustness and dynamic response ability. Finally, the proposed control strategy in this paper is verified by simulation results.
{"title":"Current Control System of Hybrid Converter for Suppressing Current Harmonics","authors":"Yang Liang, D. Liang, S. Jia, Shuaijun Chu, Hao Wang, Yongtao Liang","doi":"10.1109/IEMDC47953.2021.9449587","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449587","url":null,"abstract":"The driving electric machine of high-power flywheel energy storage system (FESS) has the characteristics of high fundamental frequency and low inductance, which lead to high current harmonic content and increases the loss of FESS. To suppress the current harmonics, a compound control scheme is proposed for an innovative hybrid converter in this paper. The mathematical model of the hybrid converter is analyzed and divided into two parts: main voltage source converter (MVSC) and filtering voltage source converter (FVSC). According to the characteristics of MVSC and FVSC in output power and switching frequency, two different regular sampling strategies are described and applied. On this basis, the exact MVSC model in discrete time-domain is established, and the current controller with complex vector decoupling is designed. Similarly, a current controller with feedback decoupling is designed for FVSC in the continuous time-domain. Both the current controllers have excellent robustness and dynamic response ability. Finally, the proposed control strategy in this paper is verified by simulation results.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129360477","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449569
V. Abramenko, C. Di, I. Petrov, J. Pyrhönen
The paper considers an idea of novel modular approach to a resolver design. The rotor of the resolver represents a simple piece of laminated steel with variable reluctance as in commercial resolvers. The stator part, however, is different. Each stator tooth is replaced with an H-core segment, which contains two windings: excitation and sensing. The design is unified in such a way that the same cores can be used in manufacturing resolvers of different sizes with different pole numbers. The size of the stator is significantly reduced because it can cover only about one saliency pitch of resolver. The solution is especially advantageous in electrical drives where the motor has a large number of poles. However, the side effect, which has a negative impact on the accuracy of a resolver with the proposed stator, should be considered during the design. The side effect is analyzed in the proposed resolver structure using the finite element method (FEM) and some approaches to reduce its negative effect are proposed.
{"title":"Novel modular design of a position-sensing resolver","authors":"V. Abramenko, C. Di, I. Petrov, J. Pyrhönen","doi":"10.1109/IEMDC47953.2021.9449569","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449569","url":null,"abstract":"The paper considers an idea of novel modular approach to a resolver design. The rotor of the resolver represents a simple piece of laminated steel with variable reluctance as in commercial resolvers. The stator part, however, is different. Each stator tooth is replaced with an H-core segment, which contains two windings: excitation and sensing. The design is unified in such a way that the same cores can be used in manufacturing resolvers of different sizes with different pole numbers. The size of the stator is significantly reduced because it can cover only about one saliency pitch of resolver. The solution is especially advantageous in electrical drives where the motor has a large number of poles. However, the side effect, which has a negative impact on the accuracy of a resolver with the proposed stator, should be considered during the design. The side effect is analyzed in the proposed resolver structure using the finite element method (FEM) and some approaches to reduce its negative effect are proposed.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"295 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124276908","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449610
Y. Demir, A. El-Refaie, M. Aydin
Fractional-slot concentrated winding permanent magnet (PM) machines have been gaining interest over the last decade in various applications. In this paper, a comparison of various conventional fractional-slot PM machines with an unconventional and unbalanced fractional-slot distributed winding PM motor is presented. The motors are designed for the same torque-speed curve, same design envelope, same electrical loading and magnet weight. No skewing is utilized in the designs for a fair comparison. It is found that 12-slot/10-pole and 27-slot/12-pole combinations stand out in terms of meeting the same torque-speed profile of the baseline machine with 39-slot/12-pole while having comparable performance metrics especially when it comes to reducing torque ripple.
{"title":"Comparison of Permanent Magnet Machines Equipped with Unbalanced Fractional-Slot Distributed Windings vs. Balanced Fractional-Slot Concentrated Windings","authors":"Y. Demir, A. El-Refaie, M. Aydin","doi":"10.1109/IEMDC47953.2021.9449610","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449610","url":null,"abstract":"Fractional-slot concentrated winding permanent magnet (PM) machines have been gaining interest over the last decade in various applications. In this paper, a comparison of various conventional fractional-slot PM machines with an unconventional and unbalanced fractional-slot distributed winding PM motor is presented. The motors are designed for the same torque-speed curve, same design envelope, same electrical loading and magnet weight. No skewing is utilized in the designs for a fair comparison. It is found that 12-slot/10-pole and 27-slot/12-pole combinations stand out in terms of meeting the same torque-speed profile of the baseline machine with 39-slot/12-pole while having comparable performance metrics especially when it comes to reducing torque ripple.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117003523","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449608
Peng Han, G. Heins, Yibin Zhang, D. Ionel
The integrated motor drive (IMD) concept with possible modularization has attracted much attention in a broad spectrum of applications ranging from low-power general-purpose industrial drives to high-power electric propulsion. This paper presents the feasibility study and performance evaluation of using common axial-flux permanent-magnet (AFPM) machines with fractional-slot concentrated windings in IMDs, with the same diameter and a minimum increase in its axial length. Different winding configurations are compared in terms of the torque/power capability and fault tolerance without changing the winding current rating. The possibility of further torque improvement is discussed from the perspective of making full use of the air-gap field harmonics produced by PMs. An AFPM machine available in the lab has been dissembled and used to build the proof-of-concept design, to show the feasibility of the proposed design and benefits of the IMD.
{"title":"Integrated Modular Motor Drives Based on Multiphase Axial-flux PM Machines with Fractional-slot Concentrated Windings","authors":"Peng Han, G. Heins, Yibin Zhang, D. Ionel","doi":"10.1109/IEMDC47953.2021.9449608","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449608","url":null,"abstract":"The integrated motor drive (IMD) concept with possible modularization has attracted much attention in a broad spectrum of applications ranging from low-power general-purpose industrial drives to high-power electric propulsion. This paper presents the feasibility study and performance evaluation of using common axial-flux permanent-magnet (AFPM) machines with fractional-slot concentrated windings in IMDs, with the same diameter and a minimum increase in its axial length. Different winding configurations are compared in terms of the torque/power capability and fault tolerance without changing the winding current rating. The possibility of further torque improvement is discussed from the perspective of making full use of the air-gap field harmonics produced by PMs. An AFPM machine available in the lab has been dissembled and used to build the proof-of-concept design, to show the feasibility of the proposed design and benefits of the IMD.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124346529","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449574
Zihang Chen, Feiyu Chen, Xiaoyan Huang, Zhaokai Li, Min Wu
Aiming at the phenomenon of integral drift in the rotor position observed by the Luenberger Observer, a sliding mode term is added to the original Luenberger term to enhance the robustness of the system. Meanwhile, in order to simplify the complexity of the observer, this paper reduces the order of the original state equation. The Differential Evolution Algorithm (DEA) is used to optimize the observer gain coefficient globally, which reduces the contingency and randomness of manual tuning.
{"title":"DEA-tuning of Reduced-order Extended Luenberger Sliding Mode Observers(ELSMO) for Sensorless Control of High-speed SPMSM","authors":"Zihang Chen, Feiyu Chen, Xiaoyan Huang, Zhaokai Li, Min Wu","doi":"10.1109/IEMDC47953.2021.9449574","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449574","url":null,"abstract":"Aiming at the phenomenon of integral drift in the rotor position observed by the Luenberger Observer, a sliding mode term is added to the original Luenberger term to enhance the robustness of the system. Meanwhile, in order to simplify the complexity of the observer, this paper reduces the order of the original state equation. The Differential Evolution Algorithm (DEA) is used to optimize the observer gain coefficient globally, which reduces the contingency and randomness of manual tuning.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124204095","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449551
R. Steckel, Christian Köbler, A. Kremser, H. Herzog
This paper presents an analysis of the additional harmonic losses in a dual three-phase induction machine, conducted for several modulation techniques. The time and spatial harmonics due to inverter supply are analysed using symmetrical components to investigate the effects of magnetic coupling in multi-phase machines. The harmonic losses are measured and segregation of the two loss components (current heat and core) performed in post-processing. The results are then juxtaposed with the harmonic losses in a three-phase induction machine serving as a reference.
{"title":"Analysis of Harmonic Losses due to Inverter Supply in Dual Three-Phase Induction Machines","authors":"R. Steckel, Christian Köbler, A. Kremser, H. Herzog","doi":"10.1109/IEMDC47953.2021.9449551","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449551","url":null,"abstract":"This paper presents an analysis of the additional harmonic losses in a dual three-phase induction machine, conducted for several modulation techniques. The time and spatial harmonics due to inverter supply are analysed using symmetrical components to investigate the effects of magnetic coupling in multi-phase machines. The harmonic losses are measured and segregation of the two loss components (current heat and core) performed in post-processing. The results are then juxtaposed with the harmonic losses in a three-phase induction machine serving as a reference.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126451025","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449526
E. Kurvinen, T. Choudhury, Juuso Narsakka, Iikka Martikainen, J. Sopanen, R. Jastrzebski
Design of High Speed (HS) electric machines is an iterative process that requires a multidisciplinary design team to accomplish the required performance. In this study, a design space method (DSM) is developed to streamline conceptual designing of a high-speed and high-power electric machine. The method uses analytical equations and a rotordynamic model to determine geometrical dimensions based on the application requirements. These dimensions create a feasible baseline design for the particular application. However, considering the dimensions as design variables and using the baseline design as a starting point, a multidimensional combination and interaction of the design variables and the correlated output for the particular topology of motor and performance range can be further studied for design exploration and optimization purposes. The study includes a test case where the baseline dimensions are determined and compared to an existing machine from literature, and then further explored to identify the sensitivity of different outputs with respect to different design variables. The method enables rapid design iterations, rotordynamics and rotor mass optimization. The baseline design can be also used as a starting point for the detailed design.
{"title":"Design Space Method for Conceptual Design Exploration of High Speed Slitted Solid Induction Motor","authors":"E. Kurvinen, T. Choudhury, Juuso Narsakka, Iikka Martikainen, J. Sopanen, R. Jastrzebski","doi":"10.1109/IEMDC47953.2021.9449526","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449526","url":null,"abstract":"Design of High Speed (HS) electric machines is an iterative process that requires a multidisciplinary design team to accomplish the required performance. In this study, a design space method (DSM) is developed to streamline conceptual designing of a high-speed and high-power electric machine. The method uses analytical equations and a rotordynamic model to determine geometrical dimensions based on the application requirements. These dimensions create a feasible baseline design for the particular application. However, considering the dimensions as design variables and using the baseline design as a starting point, a multidimensional combination and interaction of the design variables and the correlated output for the particular topology of motor and performance range can be further studied for design exploration and optimization purposes. The study includes a test case where the baseline dimensions are determined and compared to an existing machine from literature, and then further explored to identify the sensitivity of different outputs with respect to different design variables. The method enables rapid design iterations, rotordynamics and rotor mass optimization. The baseline design can be also used as a starting point for the detailed design.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123710283","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 : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449532
Muhammed Ali Gultekin, Qian Yang, A. Bazzi, K. Pattipati, S. Joshi, Muhamed Farooq, H. Ukegawa
Reliability assessment of power semiconductor devices requires accelerated stress tests. Different test methods might produce different results. In this paper, two different test methods are used for on-state resistance degradation for Si MOSFETs: High frequency cycling and low frequency cycling. Presented results indicate that the degradation of on-state resistance occurs irrespective of which method is used. Additionally, gate-to-source capacitance degradation is shown where results show that the gate-to-source impedance degrades over time.
{"title":"High- and Low-frequency Accelerated Stress Tests for Aging Assessment of MOSFET Parameters","authors":"Muhammed Ali Gultekin, Qian Yang, A. Bazzi, K. Pattipati, S. Joshi, Muhamed Farooq, H. Ukegawa","doi":"10.1109/IEMDC47953.2021.9449532","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449532","url":null,"abstract":"Reliability assessment of power semiconductor devices requires accelerated stress tests. Different test methods might produce different results. In this paper, two different test methods are used for on-state resistance degradation for Si MOSFETs: High frequency cycling and low frequency cycling. Presented results indicate that the degradation of on-state resistance occurs irrespective of which method is used. Additionally, gate-to-source capacitance degradation is shown where results show that the gate-to-source impedance degrades over time.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116268848","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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