一种低成本的电机转速控制方法

A Lowcost Method in Speed Control of Motor

锁相技术具有自动频率跟踪功能，用于电机控制可以获得很高的精度而成本低廉，对锁相控制系统作了分析之后，给出了控制实例。

The phase locked loop can track variety of frequency.It can obtain high precision and low cost performance to apply to control speed of motor.After an analysis of phase locked loop system,a application example is carried out.