论文信息 - Optimization of average and cogging torque in 3-phase IPM motor drives

Optimization of average and cogging torque in 3-phase IPM motor drives

In this paper, an interior permanent magnet (IPM) brushless DC motor for traction applications is analyzed. The effect of magnetization direction, number of stator slots and current waveform on torque pulsation are examined. A three-phase, four-pole IPM motor is considered for the study. The finite element method is used to calculate the torque, reluctance torque, back iron flux density, tooth flux density, detent torque and back-EMF of the motor. It is shown that because of the reluctance torque resulting from rotor saliency, the peak point in the torque-angle curve is shifted to the left. Therefore, it is not possible to find the switching instants just by considering the direction of stator and rotor MMF and keeping the right angle between them. A Matlab program has been developed to rind the switching intervals, which will produce the maximum average torque and minimum cogging torque. Experimental results to support the simulation findings are included in the paper.

[1] B. Ackermann,et al. New technique for reducing cogging torque in a class of brushless DC motors , 1992 .

[2] M. Jufer,et al. Permanent-magnet synchronous motors: a comprehensive approach to cogging torque suppression , 1993 .

[3] Z. Zhu,et al. Influence of design parameters on cogging torque in permanent magnet machines , 1997 .

[4] Ali Keyhani,et al. Study of cogging torque in permanent magnet machines , 1997 .

[5] Antonio Marcus Nogueira Lima,et al. Reducing cogging torque in interior permanent magnet machines without skewing , 1998 .

[6] D. Casadei,et al. Application of a multiobjective minimization technique for reducing the torque ripple in permanent-magnet motors , 1999 .

[7] Pier Luigi Ribani,et al. Design optimization of a microsuperconducting magnetic energy storage system , 1999 .

[8] Tomy Sebastian,et al. Minimization of torque pulsations in a trapezoidal back-EMF permanent magnet brushless DC motor , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[9] Nicola Bianchi,et al. Design techniques for reducing the cogging torque in surface-mounted PM motors , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).