基于DSP的H桥级联多电平逆变器的研究  

Study of Cascaded H-bridge Multilevel Inverters Based on DSP

作　　者：杨仁增[1] 王海欣[1] 黄海宏[1] 傅鹏[2] 

机构地区：[1]合肥工业大学,安徽合肥230009 [2]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《电力电子技术》2010年第12期76-78,共3页Power Electronics

基　　金：国家九五重点科技攻关项目((1998)l303);合肥工业大学大学生创新基金项目资助(XS201005)~~

摘　　要：超导托卡马克核聚变实验装置(Experimental Advanced Superconducting Tokamak,简称EAST)快控电源是一种大容量单相逆变电源。现有的快控电源已难以满足EAST的发展要求,新型快控电源的研制难点主要集中在高压和大电流。为满足快控电源系统高压和快速响应的要求,提出了采用IGBT作为功率器件的H桥级联逆变器方案。系统采用基于DSP的载波移相技术,以降低IGBT的开关损耗,提高等效开关频率,改善输出电压波形。在此对逆变器输出电压谐波进行了分析和系统仿真,最后通过H桥级联逆变器实验装置验证了该控制策略的有效性。Experimental advanced superconducting tokamak（EAST） fast control power supply is a large capacity sin-gle phase inverter power supply.The existing system can＇t meet developmental requirement of EAST.The difficulties of new power supply are high voltage and large current.To meet requirement of high voltage and fast response,the scheme of cascaded H-bridge inverts with IGBT is presented.The technique of carrier wave phase-shifted PWM based on DSP is applied to decrease switching loss of IGBT,raise equal switch-frequency of converter and improve perfor-mance of output wave.The mathmatic analysis of harmonic and simulation of system are carried out,and the validity of proposed scheme and control strategy are confirmed by experiments.

关 键 词：H桥级联逆变器 快控电源 载波移相 

分 类 号：TM464[电气工程—电器]