In this paper, an available method reducing system power dissipation is proposed inconnecion with automatic adjusting window of the voltagesharing or the ventilating system for the mine.

• 本文针对矿井均压或通风系统的自动调节窗．采用单片机控制步进电机驱动电源的开关通断和机械闭锁的原理，使系统实现最低功耗运行。