电力拖动系统是指凡是由电动机作原动机，拖动生产机械运转，能完成生产任务的系统。
制动一直是电力拖动系统的重要问题之一。
The braking has been one of important problem for electric power drive systems at all times.
运动方程及负载特性是“电力拖动系统”课程中的重要内容。
It is very important to teach contents of motion equation and load characteristics on the lecture electric Drive course for electrical-engineering major.
给出了电力拖动系统的主回路电路图、PLC和变频器的外部接线图。
It presents the circuitry diagram of the main loop of electric drive system and the external wire-connection diagrams of PLC and converter.
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