多重化逆变器及其控制方法  

Multiple inverter and its control method

作　　者：梁中华[1] 于平泳[1] 刘春芳[1] 卢宝宏[1] 刘宏楠[1] 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110178

出　　处：《沈阳工业大学学报》2009年第3期262-265,291,共5页Journal of Shenyang University of Technology

基　　金：国家科技支撑计划项目(2006BAA01A03)

摘　　要：为了实现变频器高压输出,克服死区时间对整个系统的影响,利用6个普通三相方波逆变器实现11个方波电压叠加逆变器,并对此逆变电路提出了一种新型的空间矢量脉宽调制(SVPWM)控制方法.将SVPWM的180°导通型和120°导通型结合起来,采用电压控制外环和电流控制内环的双闭环控制方法对整个系统进行控制.M atlab/simu link仿真结果表明,该方法既可以消除死区时间的影响,又可以提高电源利用率,同时,该多重叠加技术还可以改善电压波形,提高逆变器的输出电压和功率.In order to realize the high voltage output and overcome the influence of dead time on the system, the 11 square-wave-voltage superposed inverter was implemented using 6 common three-phase square-wave inverters. A novel space vector pulse width modulation （SVPWM） control method was proposed for the inverter. The whole system was controlled through combining 180~ conduction with 120~ conduction of SVPWM as well as using the inner current loop control and outer voltage loop control. The Matlab/simulink simulation results show that the present method can eliminate the effect of dead time and improve the utilization ratio of power. The multiple superposed technology can improve the output voltage waveform, and increase the output voltage and power of inverter.

关 键 词：逆变器 空间矢量脉宽调制 多重叠加技术 变压器耦合输出 MATLAB仿真 PI控制系统 双闭环 空间矢量 

分 类 号：TM464[电气工程—电器]