论文信息 - Flux-Weakening Characteristics of Trapezoidal Back-EMF Machines in Brushless DC and AC Modes

Flux-Weakening Characteristics of Trapezoidal Back-EMF Machines in Brushless DC and AC Modes

The performance of a brushless motor which has a surface-mounted magnet rotor and a trapezoidal back-emf waveform when it is operated in BLDC and BLAC modes is evaluated, in both constant torque and flux-weakening regions, assuming the same torque, the same peak current, and the same rms current. It is shown that although the motor has an essentially trapezoidal back-emf waveform, the output power and torque when operated in the BLAC mode in the flux-weakening region are significantly higher than that can be achieved when operated in the BLDC mode due to the influence of the winding inductance and back-emf harmonics

D. Howe | Z.Q. Zhu | J.X. Shen

[1] Thomas M. Jahns. Torque Production in Permanent-Magnet Synchronous Motor Drives with Rectangular Current Excitation , 1984, IEEE Transactions on Industry Applications.

[2] Thomas M. Jahns,et al. Flux-Weakening Regime Operation of an Interior Permanent-Magnet Synchronous Motor Drive , 1987, IEEE Transactions on Industry Applications.

[3] D. Howe,et al. Direct Torque Control of PM Brushless AC Motors Having Non-sinusoidal Back-emf Waveforms , 2006 .

[4] Shigeo Morimoto,et al. Wide-speed operation of interior permanent magnet synchronous motors with high-performance current regulator , 1994 .

[5] A. G. Jack,et al. Analysis and simulation of the high-speed torque performance of brushless DC motor drives , 1995 .

[6] D. Howe,et al. Torque-Speed Characteristics of Interior-Magnet Machines in Brushless AC and DC Modes, with Particular Reference to Their Flux-Weakening Performance , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.