基于相位闭环控制的直流电动机调速方法

A DC Motor Speed Regulating Method Based on Phase Closed-Loop Control

提出了采用V/Φ变换器将和直流电动机串联的TRIAC两端压降转换为相位脉冲,通过测量相位脉宽,获得直流电动机转速信号,从而实现在可变负载应用中转速负反馈闭环控制,具有成本低、控制灵活、转速控制稳定可靠的优点。

A V/Ф converter was used to detect the voltage drop of TRIAC that is in series with DC motor,and to turn it to a phase pulse. The speed signal of the DC motor using in negative feedback closed-loop controlling of variable load was obtained by detecting the pulse width. The control method has the advantages of low cost, high flexibility and high reliability.