摘  要：一般的无刷直流空心杯电机绕组常采用三角形接法，当采用反电势法对其实行无位置传感器控制时，其控制方式与常用的星型接法电机有所不同。由此提出了一种新的反电势换相方法。实验结果证明该方法能使空心杯电机输出更大的电磁功率，转矩脉动更小。
关键词：空心杯电机；无位置传感器；反电势换相；无刷直流电机；实验

Abstract: Due to the outstanding energy saving,performance smart control performance and smooth running performance,coreless motor has been a development trend of motor as a high efficiency energy conversion equipment.However,because of the special delta coil structure,control method of coreless motor has big difference from that of star-connection motor when it is controlled by the general method of BEMF.This paper introduced a novel phase change method.The result of experimentation verified that the method can make coreless motor output more electromagnetic power and less torque ripple.
Key Words: Coreless motor;Sensorless;BEMF phase change;Brushless DC motor;Experiment