T型双极性PWM调速系统汇总.pdf

兰州理工大学《运动控制系统》课程设计 运动控制系统 课程设计 某 T 型双极式 PWM 直流调速系统设计 学院： 电信学院 专业： 学号： 姓名： 指导教师: 2013 年 6 月 10 日 30 兰州理工大学《运动控制系统》课程设计 摘要 直流 PWM 调速系统作为一种新技术，发展迅速，应用日益广泛，特别在中、 小容量的系统中，已取代 V-M 系统成为主要的直流调速方式。本文介绍了一种 主电路为 T 型结构的可逆双闭环直流 PWM 调速电路，直流 PWM 调速系统与可控 整流式调速系统相比有下列优点：主电路线路简单，需用的功率器件少；开关频 率高，电流容易连续，谐波少，电机损耗及发热都较小；低速性能好，稳速精度 高，调速范围宽；若与快速响应的电机配合，则系统频带宽，动态响应快，动态 抗扰能力强；功率开关器件工作在开关状态，导通损耗小，当开关频率适当时， 开关损耗也不大，因而装置效率较高；直流电源采用不控整流时，电网功率因数 比相控整流器高。 关键词： PWM 双闭环 T 型 直流调速 Abstract Dc PWM speed control system as a kind of new technology, developing rapidly, increasingly widely applied, especially in medium and small capacity of the system, has replaced the V - M become a main way of dc speed regulating system. Were introduced in this paper a kind of main circuit for T the structure of the reversible double closed loop dc PWM speed regulating circuit, a dc PWM speed control system compared with controllable rectifier type speed control system has the following advantages: simple main circuit wiring, needs less power device; Less easy to continuous high switch frequency, current, harmonic, motor loss and heat is small; Low speed performance is good, steady speed precision, wide speed range; If cooperate with rapid response of the motor, the system has wide frequency band, fast dynamic response, dynamic ability to resist disturbance is strong; Power switching devices work in the switch state, the conduction loss is small, when the appropriate switch frequency, switching loss is not big, so plant efficiency is higher; Dc power su