This paper proposes a new consequent-pole permanent magnet vernier machine(CPMVM),which can be regarded as a combination of two conventional CPMVM with opposite polarities.Based on the simplified axial magnetic circui...This paper proposes a new consequent-pole permanent magnet vernier machine(CPMVM),which can be regarded as a combination of two conventional CPMVM with opposite polarities.Based on the simplified axial magnetic circuit model,it is verified that the proposed CPMVM can reduce the unipolar leakage flux.In order to reduce the torque ripple of machine and improve the output torque of machine,the flux barrier is placed on the rotor of the proposed machine.Then,the parameters of the proposed CPMVM are optimized and determined.Moreover,the electromagnetic performance,including no-load air-gap flux density,average torque and torque ripple,flux linkage,back-electromotive force,cogging torque,average torque,torque ripple,power factor and loss,is compared with conventional surface-mounted permanent magnet vernier machine(SPMVM)and CPMVM.Finally,it is demonstrated that proposed CPMVM with flux barrier can effectively reduce the unipolar leakage flux and greatly reduce the torque ripple of machine.Also,compared with the SPMVM,the proposed CPMVM with flux barrier saves more than 45%of the permanent magnet material without reducing output torque.展开更多
Consequent-pole permanent magnet synchronous machines(CP-PMSMs)have attracted considerable interest as a means of reducing manufacturing costs through a marked reduction in the volume of permanent magnet required to m...Consequent-pole permanent magnet synchronous machines(CP-PMSMs)have attracted considerable interest as a means of reducing manufacturing costs through a marked reduction in the volume of permanent magnet required to meet a particular torque specification.In this paper,novel rotor topologies for a CP-PMSM are derived to unlock the full design space potential.The ON/OFF method is introduced to manage the laminated steel material distribution over the rotor region,high average torque and low torque ripple are the objects of rotor design,and the immune algorithm is used to search for the optimal material distribution for the formulated problem.More than 9000 different rotor topologies are created and evaluated within 12 hours by this methodology.The optimal topologies under different design strategy are presented,and performance of these topologies are analyzed.The analysis results show that the proposed methodology can deliver novel rotor topologies for the CP-PMSM with surprising torque quality since the torque ripple is suppressed to a low level with no average torque sacrifice.展开更多
为准确计算励磁电流,采用有限元法分析了交错磁极(consequent-pole permanent magnet,CPPM)无刷直流发电机(brushless DC generator,BLDCG)电励磁磁场和永磁磁场的耦合特点,讨论了电枢电流换流过程及其对励磁电流的影响,在此基础上推导...为准确计算励磁电流,采用有限元法分析了交错磁极(consequent-pole permanent magnet,CPPM)无刷直流发电机(brushless DC generator,BLDCG)电励磁磁场和永磁磁场的耦合特点,讨论了电枢电流换流过程及其对励磁电流的影响,在此基础上推导出考虑磁场耦合和换流过程的励磁电流表达式.实验结果表明:计及磁场耦合和电枢电流换流过程可以提高励磁电流计算的准确度.展开更多
基金supported in part by the National Natural Science Foundation of China under Projects 52177044 and 52025073in part by the China Postdoctoral Science Foundation under Project 2019T120395+3 种基金in part by Hong Kong Scholars Program under Project XJ2019031in part by the Natural Science Foundation of Jiangsu Higher Education Institutions under Project 21KJA470004in part by Qing Lan Project of Jiangsu Provincein part by the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘This paper proposes a new consequent-pole permanent magnet vernier machine(CPMVM),which can be regarded as a combination of two conventional CPMVM with opposite polarities.Based on the simplified axial magnetic circuit model,it is verified that the proposed CPMVM can reduce the unipolar leakage flux.In order to reduce the torque ripple of machine and improve the output torque of machine,the flux barrier is placed on the rotor of the proposed machine.Then,the parameters of the proposed CPMVM are optimized and determined.Moreover,the electromagnetic performance,including no-load air-gap flux density,average torque and torque ripple,flux linkage,back-electromotive force,cogging torque,average torque,torque ripple,power factor and loss,is compared with conventional surface-mounted permanent magnet vernier machine(SPMVM)and CPMVM.Finally,it is demonstrated that proposed CPMVM with flux barrier can effectively reduce the unipolar leakage flux and greatly reduce the torque ripple of machine.Also,compared with the SPMVM,the proposed CPMVM with flux barrier saves more than 45%of the permanent magnet material without reducing output torque.
基金supported in part by The Japan Society for the Promotion of Science(Scientific Research C)of Japan under Project 18K04076.
文摘Consequent-pole permanent magnet synchronous machines(CP-PMSMs)have attracted considerable interest as a means of reducing manufacturing costs through a marked reduction in the volume of permanent magnet required to meet a particular torque specification.In this paper,novel rotor topologies for a CP-PMSM are derived to unlock the full design space potential.The ON/OFF method is introduced to manage the laminated steel material distribution over the rotor region,high average torque and low torque ripple are the objects of rotor design,and the immune algorithm is used to search for the optimal material distribution for the formulated problem.More than 9000 different rotor topologies are created and evaluated within 12 hours by this methodology.The optimal topologies under different design strategy are presented,and performance of these topologies are analyzed.The analysis results show that the proposed methodology can deliver novel rotor topologies for the CP-PMSM with surprising torque quality since the torque ripple is suppressed to a low level with no average torque sacrifice.
文摘为准确计算励磁电流,采用有限元法分析了交错磁极(consequent-pole permanent magnet,CPPM)无刷直流发电机(brushless DC generator,BLDCG)电励磁磁场和永磁磁场的耦合特点,讨论了电枢电流换流过程及其对励磁电流的影响,在此基础上推导出考虑磁场耦合和换流过程的励磁电流表达式.实验结果表明:计及磁场耦合和电枢电流换流过程可以提高励磁电流计算的准确度.
