It can be seen from experimental results , that the bldcm control system reaches all the qualities required by the drill motor . the motor starts fast and operates stably in a very small torque ripple 从样机的测试结果来看,电机起动稳定快速、转矩脉动小,并具有很宽的闭环调速范围,完全满足牙钻电机各项性能指标要求。