直流电动机锁相系统速度内环的设计

锁相系统是一个能够跟踪输入信号频率和相位的闭环自动控制系统，为了获得较好的动特性和较高的稳态精度，在直流电动机锁相系统中可采用数字模拟混合系统方案，即采用双环结构，外环是鉴频鉴相环，内环是速度环。实验证明，采用速度内环是高精度宽调速的可行方案。

The Design of Speed Internal Loop in the Phase-Locked System of D. C. Motor

The phase-locked system is a closed loop automatic control system that can follow the frequency and phase of the input signals. In order to obtain better dynamic characteristics and higher steady state accuracy,the numerical simulation mixed control system, i. e., a double-loop structure is employed in the D. C. motor phase-locked system, in which the external loop is the frequency and phase discriminating loop, where as the internal loop is the speed loop. Experimental results indicate that employing the speed internal loop is a feasible plan in obtaining high accuracy and a wide adjustable speed range.