本文讨论的晶闸管的错位无环流可逆直流调速系统，与常规的结构大不相同。
This paper presents a reversible DC speed regulation system that has great difference in constructions with the normal ones.
针对磁场可逆的逻辑无环流直流调速系统，介绍了调试过程中出现的一些问题及处理方法。
The paper introduced some debugging problems and solving methods according to DC speed regulating system of reversible magnetic field and logical control without circular current.
以80c196单片机为核心，构成双极式直流pwm电梯门机可逆调速系统。
A bipolar DC PWM reversible speed-adjusting system is constituted by 80c196 single chip computer for elevator door machine.
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