摘要：在分析了现代自动调速系统所广泛采用的双闭环控制系统的基础上，提出一种基于精密锁相环和电流环的电机双模速度控制系统，该方案能够实现电机的高速高精度稳速控制。
关键词：双模速度控制；锁相；稳速控制

Abstract:According to analyzing of double-closed-loop control system which is widely adopted by the modern automatic speed adjustment systems，an electromotor dual-mode speed control system based on precision phase-lock-loop and current loop was presented.This plan can realize the high-speed，high-accuracy and speed stability control of motor.
Key Words:Dual-mode speed control；Speed stability control；Phase-lock-loop