稀土永磁无刷电机转子磁钢尺寸及气隙对输出转矩和效率的影响

Influence of Rare-earth PM Brushless Motor Rotor Magnet Size and Airgap on the Output Torque and Efficiency

为满足人工心脏对驱动电机的特殊技术要求,用实验的方法,对小转子、大气隙和高效率微型稀土永磁无刷电机的可行性进行了研究。实验结果表明在一定范围内转子磁钢尺寸的减少以及电机定、转子之间气隙的加大对微型稀土电机的性能没有太大的影响,但是电机最高效率点所对应的输出转矩将随之减小。

The possibility of a kind of small rotor?large air-gap and high effiency micro-rare-earth permanent magnet brushless motor is now being studied in order to satisfy the special technology requirements for man-made heart to drive motor.The result shows that within a certain range,there's no much influence on the performance of rare-earth permanent magnet brushless motor when the rotor's magnet size is reduced and the increased airgap between the stator and rotor.However,the output torque will be reduced on the high efficiency point of the motor.