步进电机是一种能够将电脉冲信号转换成角位移或线位移的机电元件，它实际上是一

种单相或多相同步电动机。单相步进电动机有单路电脉冲驱动，输出功率一般很小，其用途

为微小功率驱动。多相步进电动机有多相方波脉冲驱动，用途很广。使用多相步进电动机时，

单路电脉冲信号可先通过脉冲分配器转换为多相脉冲信号，在经功率放大后分别送入步进电

动机各相绕组。每输入一个脉冲到脉冲分配器，电动机各相的通电状态就发生变化，转子会

转过一定的角度（称为步距角）。正常情况下，步进电机转过的总角度和输入的脉冲数成正

比；连续输入一定频率的脉冲时，电动机的转速与输入脉冲的频率保持严格的对应关系，不

受电压波动和负载变化的影响。由于步进电动机能直接接收数字量的输入，所以特别适合于

微机控制。-Stepper motor is an electrical pulse signal can be converted to angular displacement or linear displacement of the mechanical and electrical components, it is actually a

Kind of single-phase or multi-phase synchronous motor. Single phase stepping motor drive pulses in single-circuit, Output power is generally small, its use

For the small power-driven. Multi-phase stepper motors with square wave pulse drive more, is widely used. When using the multi-phase stepper motors,

Single electric pulse signal can first convert the multi-phase pulse distributor through the pulse signal, amplified by the power of electricity were stepping into

Motivation of each phase winding. Each input pulse to the pulse distributor, the motor on each phase of the power state changes, the rotor will

Turned a certain angle (called the step angle). Under normal circumstances, the total turn angle of stepping motor and a positive input pulses

Ratio　continuous input pulse of certain frequency, the motor speed