Pub Date : 2021-05-17DOI: 10.1109/IEMDC47953.2021.9449613
Peng Peng, Xiaodan Wang, Luke Chen, Jeremiah S. Vannest, Julia Zhang, Adam Brugmann, Lloyd Utt, Eric Kline, Longya Xu
Due to the complexity of structure, operating principle, and control purposes, it is challenging to design and analyze a brushless doubly-fed machine viewing from its overall performance across the entire operating range. This paper elaborates on an efficiency mapping method of a dual-converter-driven brushless doubly-fed machine using finite element method and data post-processing. The efficiency mapping method can characterize various electromagnetic properties over the operating range and provide insightful information for the design and control development of brushless doubly-fed machines.
{"title":"Finite-Element-Based Efficiency Mapping of Dual-Converter-Driven Brushless Doubly-Fed Machines","authors":"Peng Peng, Xiaodan Wang, Luke Chen, Jeremiah S. Vannest, Julia Zhang, Adam Brugmann, Lloyd Utt, Eric Kline, Longya Xu","doi":"10.1109/IEMDC47953.2021.9449613","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449613","url":null,"abstract":"Due to the complexity of structure, operating principle, and control purposes, it is challenging to design and analyze a brushless doubly-fed machine viewing from its overall performance across the entire operating range. This paper elaborates on an efficiency mapping method of a dual-converter-driven brushless doubly-fed machine using finite element method and data post-processing. The efficiency mapping method can characterize various electromagnetic properties over the operating range and provide insightful information for the design and control development of brushless doubly-fed machines.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"1 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":"127046975","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/IEMDC47953.2021.9449602
Abdulwahab A. Aljabrine, B. Johnson, N. Fischer
This paper presents the development of a laboratory-scale testbed to investigate the behavior of synchronous generators under rated and abnormal operating conditions. A measurement platform is built that can be used with multiple machines in the lab. The platform is used to collect time-aligned, high resolution measurements of rotor speed, applied torque, load angle, terminal current, terminal voltage, field current, field voltage, and electric power. Results produced using testbed to perform online state estimation to characterize synchronous generator steady-state parameters are presented to demonstrate the performance of the testbed. An Unscented Kalman filter (UKF) based approach is applied to estimate the parameters of the laboratory generator. The estimated parameters are validated against IEEE 115 tests.
{"title":"Synchronous Generator Testbed for Parameter Estimation","authors":"Abdulwahab A. Aljabrine, B. Johnson, N. Fischer","doi":"10.1109/IEMDC47953.2021.9449602","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449602","url":null,"abstract":"This paper presents the development of a laboratory-scale testbed to investigate the behavior of synchronous generators under rated and abnormal operating conditions. A measurement platform is built that can be used with multiple machines in the lab. The platform is used to collect time-aligned, high resolution measurements of rotor speed, applied torque, load angle, terminal current, terminal voltage, field current, field voltage, and electric power. Results produced using testbed to perform online state estimation to characterize synchronous generator steady-state parameters are presented to demonstrate the performance of the testbed. An Unscented Kalman filter (UKF) based approach is applied to estimate the parameters of the laboratory generator. The estimated parameters are validated against IEEE 115 tests.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"3 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":"114463247","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/IEMDC47953.2021.9449498
G. Volpe, Mircea Popescu, L. Di Leonardo, S. Xue
This paper focuses on the alternative current (AC) losses in hairpin winding variation due to the skin and proximity effects in synchronous brushless permanent magnet machines when supplied from a pulse width modulation (PWM) inverter. Based on a motor used in a 200kW electrical drive unit, three main methodologies are investigated to demonstrate the importance of these additional losses and how it is possible to take them into account when modeling the electrical machine performance. A more rigorous approach and two more time-efficient ones are utilized for the purpose, showing powerful ways of taking into consideration the pulse width modulation induced eddy currents losses in stator conductors since the early stages of the design process. A reduction ratio of 30:1 in computation time gives the proposed methodologies great merit not only in modeling single operating points, but over the full torque-speed characteristic, efficiency maps, and drive/duty-cycles analyses.
{"title":"Efficient Calculation of PWM AC Losses in Hairpin Windings for Synchronous BPM Machines","authors":"G. Volpe, Mircea Popescu, L. Di Leonardo, S. Xue","doi":"10.1109/IEMDC47953.2021.9449498","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449498","url":null,"abstract":"This paper focuses on the alternative current (AC) losses in hairpin winding variation due to the skin and proximity effects in synchronous brushless permanent magnet machines when supplied from a pulse width modulation (PWM) inverter. Based on a motor used in a 200kW electrical drive unit, three main methodologies are investigated to demonstrate the importance of these additional losses and how it is possible to take them into account when modeling the electrical machine performance. A more rigorous approach and two more time-efficient ones are utilized for the purpose, showing powerful ways of taking into consideration the pulse width modulation induced eddy currents losses in stator conductors since the early stages of the design process. A reduction ratio of 30:1 in computation time gives the proposed methodologies great merit not only in modeling single operating points, but over the full torque-speed characteristic, efficiency maps, and drive/duty-cycles analyses.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"84 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":"114495359","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/IEMDC47953.2021.9449535
Michael Wise, M. Al-Badri
This paper presents a process of electrical generator selection and operation for low speed renewable hydrokinetic energy resources. As more renewable energy resources enter the marketplace, generators customized towards unsteady mechanical input power and low speed operation become critical design points. Traditional power generation has relied upon steady operation to which the majority of generators are designed. The process of generator selection for low speed unsteady resources encompasses many design factors and tradeoffs. Generator selection is discussed and evaluated with respect to a low-speed vertical oscillator hydrokinetic energy resource. The complete generator selection entails selecting a generator type, modeling in simulation, and testing in a laboratory setting. This paper lays out the considerations that must be made in order to implement a successful design from the standpoint of power generation in many new and unproven renewable energy resources.
{"title":"Energy Conversion Unit for Low-Speed Vertical Oscillator Hydrokinetic Energy Harvester","authors":"Michael Wise, M. Al-Badri","doi":"10.1109/IEMDC47953.2021.9449535","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449535","url":null,"abstract":"This paper presents a process of electrical generator selection and operation for low speed renewable hydrokinetic energy resources. As more renewable energy resources enter the marketplace, generators customized towards unsteady mechanical input power and low speed operation become critical design points. Traditional power generation has relied upon steady operation to which the majority of generators are designed. The process of generator selection for low speed unsteady resources encompasses many design factors and tradeoffs. Generator selection is discussed and evaluated with respect to a low-speed vertical oscillator hydrokinetic energy resource. The complete generator selection entails selecting a generator type, modeling in simulation, and testing in a laboratory setting. This paper lays out the considerations that must be made in order to implement a successful design from the standpoint of power generation in many new and unproven renewable energy resources.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"85 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":"127692350","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/IEMDC47953.2021.9449500
Jialou Gao, Boyang Li, Dong Jiang, Min Zhou
The power level of on-board charger (OBC) is limited by its cost and space occupation. Although the power density of OBC can be improved by system integration or applying wide bandgap power semiconductor device, the power level is still limited to 22 kW. Using the drivetrain of EV to constitute the AC/DC rectifier stage of OBC can save “half” the space of OBC. Therefore, the OBC will only need isolated DC/DC converter stage so that the power level will be improved a lot. The crux of integrated motor drive and charger system (IMDCS) is how to eliminate the motor torque in charging mode. This paper reviews and compares the existing torque cancellation methods. Furthermore, the essences of those methods are analyzed and classified. Finally, simulations and experiments results are used to verify the point of this paper.
{"title":"Review of Torque Cancellation Methods for Integrated Motor Drive and Charger System","authors":"Jialou Gao, Boyang Li, Dong Jiang, Min Zhou","doi":"10.1109/IEMDC47953.2021.9449500","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449500","url":null,"abstract":"The power level of on-board charger (OBC) is limited by its cost and space occupation. Although the power density of OBC can be improved by system integration or applying wide bandgap power semiconductor device, the power level is still limited to 22 kW. Using the drivetrain of EV to constitute the AC/DC rectifier stage of OBC can save “half” the space of OBC. Therefore, the OBC will only need isolated DC/DC converter stage so that the power level will be improved a lot. The crux of integrated motor drive and charger system (IMDCS) is how to eliminate the motor torque in charging mode. This paper reviews and compares the existing torque cancellation methods. Furthermore, the essences of those methods are analyzed and classified. Finally, simulations and experiments results are used to verify the point of this paper.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"45 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":"124200289","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/IEMDC47953.2021.9449560
C. Bianchini, A. Torreggiani, M. Davoli, Danilo David, Andrea Sala, A. Bellini
The linear induction motor is mainly adopted for traction or motion transmission applications. Some advantages of linear induction motors are: a direct electromagnetic thrust propulsion (no need of mechanical transmissions), low maintenance costs and precision linear positioning; on the other hand, this motor topology has low power factor and efficiency, longitudinal and transversal edge-effect. This paper proposes a novel fast simulation method to evaluate the performance and machine parameters of a double-sided linear induction motor via 2-D finite element analysis considering both a magnetic time-harmonic and magnetostatic problems. The thrust force is computed tuning the secondary aluminum plate resistivity as a function of the path length of the induced eddy currents due to the fundamental of the air gap magnetomotive force. The proposed method has been verified via several 2-D finite element simulations and validated with experimental tests.
{"title":"High Air Gap Linear Induction Motor Fast Simulation","authors":"C. Bianchini, A. Torreggiani, M. Davoli, Danilo David, Andrea Sala, A. Bellini","doi":"10.1109/IEMDC47953.2021.9449560","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449560","url":null,"abstract":"The linear induction motor is mainly adopted for traction or motion transmission applications. Some advantages of linear induction motors are: a direct electromagnetic thrust propulsion (no need of mechanical transmissions), low maintenance costs and precision linear positioning; on the other hand, this motor topology has low power factor and efficiency, longitudinal and transversal edge-effect. This paper proposes a novel fast simulation method to evaluate the performance and machine parameters of a double-sided linear induction motor via 2-D finite element analysis considering both a magnetic time-harmonic and magnetostatic problems. The thrust force is computed tuning the secondary aluminum plate resistivity as a function of the path length of the induced eddy currents due to the fundamental of the air gap magnetomotive force. The proposed method has been verified via several 2-D finite element simulations and validated with experimental tests.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"136 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":"115948180","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/IEMDC47953.2021.9449505
Kotb B. Tawfiq, M. Ibrahim, E. El-Kholy, P. Sergeant
This paper analyses the performance of a high reliability multiphase electric drive system. The drive system consists of a five-phase synchronous reluctance machine (SynRM) connected to a three to five-phase matrix converter (MC). In this system, there is no vulnerable electrolytic DC-link capacitors, which considered a point of failure in conventional electric drive systems. The indirect space vector modulation (SVM) is used to control the five-phase MC. Indirect SVM deals with the five-phase MC as a virtual two-stage converter consisting of a virtual DC link, a virtual rectifier stage and a virtual inverter stage. In addition, a modified closed loop field-oriented control based on the indirect SVM is proposed to control the five-phase SynRM. The performance of the drive system is analyzed at different operating conditions.
本文分析了一种高可靠性多相电驱动系统的性能。驱动系统由一个五相同步磁阻电机(SynRM)连接到一个三到五相矩阵变换器(MC)。在这个系统中，没有易损坏的电解直流链路电容器，这在传统的电力驱动系统中被认为是一个故障点。采用间接空间矢量调制(indirect space vector modulation, SVM)对五相混合电源进行控制。间接空间矢量调制将五相混合电源作为虚拟两级变换器，由虚拟直流链路、虚拟整流级和虚拟逆变级组成。此外，提出了一种基于间接支持向量机的改进闭环面向场控制方法来控制五相SynRM。分析了驱动系统在不同工况下的性能。
{"title":"Performance Analysis of a Five-phase Synchronous Reluctance Motor Connected to Matrix Converter","authors":"Kotb B. Tawfiq, M. Ibrahim, E. El-Kholy, P. Sergeant","doi":"10.1109/IEMDC47953.2021.9449505","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449505","url":null,"abstract":"This paper analyses the performance of a high reliability multiphase electric drive system. The drive system consists of a five-phase synchronous reluctance machine (SynRM) connected to a three to five-phase matrix converter (MC). In this system, there is no vulnerable electrolytic DC-link capacitors, which considered a point of failure in conventional electric drive systems. The indirect space vector modulation (SVM) is used to control the five-phase MC. Indirect SVM deals with the five-phase MC as a virtual two-stage converter consisting of a virtual DC link, a virtual rectifier stage and a virtual inverter stage. In addition, a modified closed loop field-oriented control based on the indirect SVM is proposed to control the five-phase SynRM. The performance of the drive system is analyzed at different operating conditions.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"8 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":"116922948","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/IEMDC47953.2021.9449492
L. Di Leonardo, Mircea Popescu, M. Tursini
This paper presents a transient mathematical model for induction motors based on space harmonics and saturation effects. The model is based on the calculation of the phase-linked magnetic flux accounting for the geometry and physical dimensions of the stator and rotor windings, other than the magnetic steel saturation characteristic. The space-harmonic components of the magnetic induction are calculated at each time-step considering the currents in the stator windings and in the rotor bars as well as the rotor position. The electromagnetic torque is computed as well. The model is validated by comparison with a co-simulation approach that uses finite element calculus in transient mode. Method accuracy and effects of simplifications are investigated both in static and transient behavior. The case study and the presented results refer to a prototypal induction motor for high power electric vehicles.
{"title":"Transient Modeling of Induction Motors considering Space Harmonics and Saturation Effects","authors":"L. Di Leonardo, Mircea Popescu, M. Tursini","doi":"10.1109/IEMDC47953.2021.9449492","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449492","url":null,"abstract":"This paper presents a transient mathematical model for induction motors based on space harmonics and saturation effects. The model is based on the calculation of the phase-linked magnetic flux accounting for the geometry and physical dimensions of the stator and rotor windings, other than the magnetic steel saturation characteristic. The space-harmonic components of the magnetic induction are calculated at each time-step considering the currents in the stator windings and in the rotor bars as well as the rotor position. The electromagnetic torque is computed as well. The model is validated by comparison with a co-simulation approach that uses finite element calculus in transient mode. Method accuracy and effects of simplifications are investigated both in static and transient behavior. The case study and the presented results refer to a prototypal induction motor for high power electric vehicles.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"8 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":"122725252","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/IEMDC47953.2021.9449553
S. Kuruppu
Permanent magnet synchronous machines (PMSM) are widely utilized in applications demanding high torque output and torque density. Among them are hybrid electric powertrain and electric power steering (EPS) systems used in the transportation sector. Field oriented control (FOC), is one of the preferred methods of control for PMSMs due to the unique advantages. Accurate rotor position measurement is of paramount importance for proper field-oriented control of PMSMs. The relative angle offset between the position sensor zero and rotor zero is a key calibration for each PMSM drive system. However, calibration of the position sensor while the machine is in the system is a challenging problem. Certain powertrain architectures and EPSs with dual machines, facilitate the driving of one machine with the other. This paper proposes a unique approach to calibrate the position sensor offset of a PMSM system, while in-system, in machine-drive architectures that allow in-system rotation of the machine needing calibration with another actuator (i.e. internal combustion engine or second electric machine in dual wound machines). Analysis, simulation, and experimental results are provided that validates the proposed method.
{"title":"In-System Calibration of Position Sensor Offset in PMSM Drives","authors":"S. Kuruppu","doi":"10.1109/IEMDC47953.2021.9449553","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449553","url":null,"abstract":"Permanent magnet synchronous machines (PMSM) are widely utilized in applications demanding high torque output and torque density. Among them are hybrid electric powertrain and electric power steering (EPS) systems used in the transportation sector. Field oriented control (FOC), is one of the preferred methods of control for PMSMs due to the unique advantages. Accurate rotor position measurement is of paramount importance for proper field-oriented control of PMSMs. The relative angle offset between the position sensor zero and rotor zero is a key calibration for each PMSM drive system. However, calibration of the position sensor while the machine is in the system is a challenging problem. Certain powertrain architectures and EPSs with dual machines, facilitate the driving of one machine with the other. This paper proposes a unique approach to calibrate the position sensor offset of a PMSM system, while in-system, in machine-drive architectures that allow in-system rotation of the machine needing calibration with another actuator (i.e. internal combustion engine or second electric machine in dual wound machines). Analysis, simulation, and experimental results are provided that validates the proposed method.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"308 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":"123144564","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/IEMDC47953.2021.9449609
W. Zhang, G. Li, Z. Zhu, B. Ren, M. Michon
This paper presents the global optimization of modular surface-mounted permanent magnet machines considering the effect of stator modularity on machine electromagnetic performances. In order to optimize the electromagnetic performance, the multi-objective genetic algorithm is adopted and 2D finite element method is used. Variables such as stator yoke height, tooth width, flux gap width, split ratio and rotor yoke thickness have been selected for the optimization. The objectives are to achieve maximized average torque, minimized torque ripple, copper loss and total machine mass. Amongst all the variables, the flux gap width is a key parameter which has significant impact on machine electromagnetic performance, but has not been included in the optimization process in the literature. The results in this paper have shown that considering the flux gap width in the optimization will lead to further improvement in machine electromagnetic performance. In addition, for machines with lower slot number than rotor pole number, the optimization process shows that an appropriate flux gap width is needed for optimal electromagnetic performance. However, for machines with higher slot number than pole number, the flux gap width tends to be zero, leading to non-modular machine having the optimal performance.
{"title":"Optimization of Modular SPM Machines Considering Stator Modularity","authors":"W. Zhang, G. Li, Z. Zhu, B. Ren, M. Michon","doi":"10.1109/IEMDC47953.2021.9449609","DOIUrl":"https://doi.org/10.1109/IEMDC47953.2021.9449609","url":null,"abstract":"This paper presents the global optimization of modular surface-mounted permanent magnet machines considering the effect of stator modularity on machine electromagnetic performances. In order to optimize the electromagnetic performance, the multi-objective genetic algorithm is adopted and 2D finite element method is used. Variables such as stator yoke height, tooth width, flux gap width, split ratio and rotor yoke thickness have been selected for the optimization. The objectives are to achieve maximized average torque, minimized torque ripple, copper loss and total machine mass. Amongst all the variables, the flux gap width is a key parameter which has significant impact on machine electromagnetic performance, but has not been included in the optimization process in the literature. The results in this paper have shown that considering the flux gap width in the optimization will lead to further improvement in machine electromagnetic performance. In addition, for machines with lower slot number than rotor pole number, the optimization process shows that an appropriate flux gap width is needed for optimal electromagnetic performance. However, for machines with higher slot number than pole number, the flux gap width tends to be zero, leading to non-modular machine having the optimal performance.","PeriodicalId":106489,"journal":{"name":"2021 IEEE International Electric Machines & Drives Conference (IEMDC)","volume":"33 7-8 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":"116479077","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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