《单片机与SA4828控制的SPWM变频电源》.pdf

片机与SA4828 控制的SPWM 变频电源 1 2, 3 4 卫锋 林立 甘鹏 （1.邵阳职业技术学院； 2 邵阳学院 信息与电气工程系； 3 上海大学 机电工程与自动化 学院；4 湖南省星源电气有限公司） 要：本文利用微处理器作为控制器，结合专用的SPWM 集成电路，设计三相SPWM 变频 电源。系统主电路形式采用AC-DC-AC 结构,逆变部分选用IGBT 单元模块加上并联缓冲电 路。输入采用三相全波不可控整流电路，提高了系统的功率因数。系统控制电路由MCS-51 系列的8051 单片机最小系统和SA4828 三相SPWM 产生器及少量的扩展外围芯片构成，系 统实现了变频电源的全数字化控制。 关键词：单片机；正弦脉宽调制；变频电源；绝缘栅双极晶体管 中图分类号：TP273 ；TN36,TM32，文献标识码：B SPWM Frequency Conversion Power Supply Controlled by One-chip Computer and SA4828 XIA WEIFENG1 LIN LI2,3 GAN PENG4 （1.Mechanical Electronic Engineeing Department, ShaoYang Vocational-Technic College;2. Information and Electrical Engineering Department ,Shaoyang University ,Shaoyang , Hunan;3 College of Mechatronics Engineering and Automation, Shanghai University; 4 Xingyuan Electrical Company，Hunan ) Abstract This design uses the microcomputer as controller and Combines special-purpose SPWM integrated circuit designs SPWM frequency conversion power supply. The main circuit form of the system adopts AC-DC-AC structure, the inverter part consist of IGBTS and a parallel buffer circuit. the system adopts three-phase the whole wave uncontrolled rectification input circuit, improves the quality of the electric which is supplied to inverter. The control circuit of the system consist of is 8051 single-chip microcomputer minimum