Synchronal level of the motor of preshrunk finish ma chine can influence product quality. By DPLL DC governing system, the circuit be comes terse, debugged easily and controlled precisely.

• 预缩机中各电机的同步水平对产品质量影响很大,采用数字化锁相环直流调速系统,电路简单,容易调试,而且能有很高的调速精度。