It consists of motor, drive mechanism and the drum or sprocket composition, divided into two types of wire rope and chain.

它由电动机、传动机构和卷筒或链轮组成，分为钢丝绳和环链两种。

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This paper describes the idle speed control stepper motor type composition, Stepper Motor Idle Control Valve on the main structure, Idle Speed Control Stepper Motor Control Principle of the device.

主要介绍步进电机式怠速控制装置的组成，步进电机式怠速控制阀的主要结构及步进电机式怠速控制装置的控制原理。

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The article introduced the composition, the main characteristics and the control principle of the ac servo motor control system as well as points for attention in the system debugging process.

介绍交流伺服电机控制系统的组成、主要特性、控制原理及在系统调试过程中应注意的事项。

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