死区对逆变性能的影响及其补偿方法  

Dead-time Effect on the Inverter Performance and Compensation Method for Zone Control

作　　者：代伟 龙英文[2] 宋芳[2] 章伟[2] DAI Wei;LONG Ying-wen;SONG Fang;ZHANG Wei(College of Mechanical Engineering;Laboratory of Intelligent Control and Robotics, Shanghai University of Engineering Science)

机构地区：[1]上海工程技术大学机械工程学院 [2]上海工程技术大学机器人智能控制及功能化设计实验室

出　　处：《化工自动化及仪表》2018年第4期294-297,311,共5页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金项目(51505273)

摘　　要：在分析死区时间对单相SPWM逆变输出波形特性影响的基础上,提出一种新的方案来改善死区效应。通过采用直流母线电压前馈补偿的措施来实时调整载波形状,可以有效降低输出电压的三次谐波,同时结合电流反馈脉冲调整和重复控制来更大程度地改善死区对逆变性能的影响。在实验室自制的逆变器中进行了相关实验,结果表明:所提方法可以有效改善电压的波形畸变,降低输出电压的谐波含量。Basing on analyzing the dead-time effect on single-phase SPWM inverter＇ s output waveform charac- teristics, a new control scheme was proposed to improve dead zone effect. Through adopting DC bus voltage feed-forward compensation measures to adjust wave shape at real time, the third harmonic component in the output voltage was reduced effectively and the dead-time effect on the inverter performance was improved to a greater extent through combined with current feedback pulse adjustment and repetitive control. The relevant experiments on a laboratory-made inverter show that, the said methods can effectively improve the voltage waveform distortion and reduce the output voltage harmonic content.

关 键 词：死区时间 补偿 重复控制 直流母线电压 前馈补偿 

分 类 号：TM464[电气工程—电器]