The bipolar two-phase hybrid stepping motor integrated with chip L6217A was mainly used in this drive circuit to realize the ability of current subdivision.
该驱动电路主要应用双极性两相混合式步进电机驱动集成芯片L 6217a，来实现电流细分功能。
2
A bipolar DC PWM reversible speed-adjusting system is constituted by 80c196 single chip computer for elevator door machine.