1.步进电动机有三线式、五线式、六线式三种，但其控制方式均相同，必须以脉冲电流来驱

动。若每旋转一圈以20 个励磁信号来计算，则每个励磁信号前进18 度，其旋转角度与脉冲数成

正比，正、反转可由脉冲顺序来控制。

2.步进电动机的励磁方式可分为全部励磁及半步励磁，其中全步励磁又有1 相励磁及2 相励

磁之分，而半步励磁又称1-2 相励磁。图为步进电动机的控制等效电路，适应控制A、B、/A、

/B 的励磁信号，即可控制步进电动机的转动。每输出一个脉冲信号，步进电动机只走一步。因

此，依序不断送出脉冲信号，即可步进电动机连续转动。

a.1 相励磁法：在每一瞬间只有一个线圈导通。消耗电力小，精确度良好，但转矩小，振动

较大，每送一励磁信号可走18 度。若欲以1 相励磁法控制步进电动机正转，其励磁顺序如图所

示。若励磁信号反向传送，则步进电动机反转。-1. Stepper motor, three-wire, five-wire or six-wire three, but its control are the same, must be based on pulse current to drive

Action. If every revolution of the order of 20 to calculate the excitation signals, each excitation signal forward 18 degrees, the rotation angle and number of pulses into

Proportional, positive and reverse pulse sequence can be controlled.

2. Stepper motors can be divided into all the exciting half-step excitation and excitation, which have a phase excitation full step 2 phase excitation and the excitation

Magnetism of the points, while the half-step excitation, also known as 1-2 phase excitation. The picture shows the equivalent circuit of stepper motor control, adaptive control A, B,/A,

/ B of the excitation signal, you can control the stepper motor rotation. Each output of a pulse signal, the stepper motor only step. Because

This pulse sequence sent continuously, you can continuously rotate stepper motor.

a.1-phase excitation method: at each moment