On this base, the closed - loopcontrol method of hybrid step motor using the harmonic back EMF is investigated, and the microcomputer control system of step motor is designed.
Adopting ac servo motor as the driving device, can the dc servo motor and a high precision, high performance as the half closedloop or closedloopcontrol system.
采用交流伺服电机作为驱动器件，可以和直流伺服电机一样构成高精度，高性能的半闭环或闭环控制系统。
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In this paper, the closed-loopcontrol method of hybrid step motor using the harmonic back EMF is investigated.