不同极槽配合内置永磁电机转矩性能研究
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摘要
内置式永磁电机的极槽配合影响电机的磁路结构与绕组分布,在电机的设计过程中,选择合适的极槽配合可以提高电机的转矩性能。文中利用相量图说明了空载特性与输出转矩的关系,分析了极槽配合对空载特性的影响规律。以分数槽的极槽配合建立了分别采用集中绕组与分布绕组的四种二维模型。利用有限元计算方法,得到空载气隙磁密与反电势波形、额定条件下的输出转矩情况。结果证明极槽比为5/6的整数倍时,电机的空载特性与转矩性能得到了改善,性价比得到了提高。
Magnetic circuit and winding distribution are influenced by pole-slot combination of IPMSM,and torque characteristic can be improved by selecting an appropriate pole-slot combination. This paper discussed the connection between the characteristics in no-load condition and output torque by vector diagram,analyzed the laws of no-load characteristics influenced by pole-slot combination. Four 2D models were built with fractional slots concentrated winding and fractional slots distributed winding. By finite element method,waveforms of air-gap flux density and back-EMF in no-load condition,torque characteristic in rated condition were obtained. And the results proved that no-load and torque characteristics were improved if poles/slots were integral multiple of 5/6,and cost performance of IPMSM could be better.
Magnetic circuit and winding distribution are influenced by pole-slot combination of IPMSM,and torque characteristic can be improved by selecting an appropriate pole-slot combination. This paper discussed the connection between the characteristics in no-load condition and output torque by vector diagram,analyzed the laws of no-load characteristics influenced by pole-slot combination. Four 2D models were built with fractional slots concentrated winding and fractional slots distributed winding. By finite element method,waveforms of air-gap flux density and back-EMF in no-load condition,torque characteristic in rated condition were obtained. And the results proved that no-load and torque characteristics were improved if poles/slots were integral multiple of 5/6,and cost performance of IPMSM could be better.
引文
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[2]Zhu Z Q,Howe D.Influence of Design Parameters on Cogging Torque in Permanent Magnet Machines[J].IEEE Transactions on Energy Conversion,2001,15(4):407-412.
[3]Soon-O Kwon,Jeong-Jong Lee,Young-Kyun Kim,et al.Design Strategy of Interior Permanent Magnet Synchronous Motor for Electrical Power Steering Considering Cogging Torque and Torque Ripple using Current Harmonics[C].Computation of Electromagnetic Field.Department of Automotive Engineering,Hanyang University,2009.937-939.
[4]Kang H,Zhou L,Wang J.Harmonic Winding Factors and MMF Analysis for Five-phase Fractional-slot Concentrated Winding PMSM[C].Electrical Machines and Systems,International Conference on.IEEE,2013:1236-1241.
[5]Ponomarev P,Lindh P,Pyrhonen J.Effect of Slot-and-Pole Combination on the Leakage Inductance and the Performance of Tooth-Coil Permanent-Magnet Synchronous Machines[J].IEEE Transactions on Industrial Electronics,2013,60(60):4310-4317.
[6]Choi J Y,Park Y S,Jang S M.Experimental Verification and Electromagnetic Analysis for Performance of Interior PM Motor According to Slot/Pole Number Combination[J].IEEE Transactions on Magnetics,2012,48(2):987-990.
[7]A J Mitcham,G Antonopoulos,Cullen J J A.Favourableslot and Pole Number Combinations for Fault-tolerant PM Machines[J].IEEE Proceedings-Electric Power Applications,2004,151(5):520-525.
[8]李娟娟.采用分数槽绕组的永磁同步电机性能分析[D].天津:天津大学,2012.
[9]Jung J W,Hong J P,Kim Y K.Characteristic Analysis and Comparison of IPMSM for HEV According to Pole and Slot Combination[C].Vehicle Power and Propulsion Conference,2007:778-783.
[10]Lee S J,Kim S I,Hong J P.Characteristics of PM Synchronous Motors According to Pole-slot Combinations for EPS Applications[J].International Journal of Automotive Technology,2014,15(7):1183-1187.
[11]Chung S U,Kim J M,Koo D H,et al.Fractional Slot Concentrated Winding Permanent Magnet Synchronous Machine With Consequent Pole Rotor for Low Speed Direct Drive[J].IEEE Transactions on Magnetics,2012,48(11):2965-2968.
[2]Zhu Z Q,Howe D.Influence of Design Parameters on Cogging Torque in Permanent Magnet Machines[J].IEEE Transactions on Energy Conversion,2001,15(4):407-412.
[3]Soon-O Kwon,Jeong-Jong Lee,Young-Kyun Kim,et al.Design Strategy of Interior Permanent Magnet Synchronous Motor for Electrical Power Steering Considering Cogging Torque and Torque Ripple using Current Harmonics[C].Computation of Electromagnetic Field.Department of Automotive Engineering,Hanyang University,2009.937-939.
[4]Kang H,Zhou L,Wang J.Harmonic Winding Factors and MMF Analysis for Five-phase Fractional-slot Concentrated Winding PMSM[C].Electrical Machines and Systems,International Conference on.IEEE,2013:1236-1241.
[5]Ponomarev P,Lindh P,Pyrhonen J.Effect of Slot-and-Pole Combination on the Leakage Inductance and the Performance of Tooth-Coil Permanent-Magnet Synchronous Machines[J].IEEE Transactions on Industrial Electronics,2013,60(60):4310-4317.
[6]Choi J Y,Park Y S,Jang S M.Experimental Verification and Electromagnetic Analysis for Performance of Interior PM Motor According to Slot/Pole Number Combination[J].IEEE Transactions on Magnetics,2012,48(2):987-990.
[7]A J Mitcham,G Antonopoulos,Cullen J J A.Favourableslot and Pole Number Combinations for Fault-tolerant PM Machines[J].IEEE Proceedings-Electric Power Applications,2004,151(5):520-525.
[8]李娟娟.采用分数槽绕组的永磁同步电机性能分析[D].天津:天津大学,2012.
[9]Jung J W,Hong J P,Kim Y K.Characteristic Analysis and Comparison of IPMSM for HEV According to Pole and Slot Combination[C].Vehicle Power and Propulsion Conference,2007:778-783.
[10]Lee S J,Kim S I,Hong J P.Characteristics of PM Synchronous Motors According to Pole-slot Combinations for EPS Applications[J].International Journal of Automotive Technology,2014,15(7):1183-1187.
[11]Chung S U,Kim J M,Koo D H,et al.Fractional Slot Concentrated Winding Permanent Magnet Synchronous Machine With Consequent Pole Rotor for Low Speed Direct Drive[J].IEEE Transactions on Magnetics,2012,48(11):2965-2968.