三相升-降压PWM整流器SVPWM控制策略研究  

SVPWM Control Strategy Research for Three-phase Step-up/down PWM AC/DC Converter

作　　者：李帅[1] 李槐树[1] 李文艳[1] 黄克峰[1] 

机构地区：[1]海军工程大学电气与信息工程学院,湖北武汉430033

出　　处：《电气传动》2012年第6期22-26,共5页Electric Drive

摘　　要：针对目前电机控制等应用领域常用的升-降压整流系统存在无法直接输出大范围连续平滑可调直流电压等不足,分析了基于三相电压型PWM整流电路与C′uk电路整合的升-降压PWM整流器的工作原理,按照控制简单、易于工程实现、有效降低开关频率等原则,用零矢量拓展概念设计了基于SVPWM控制的新控制策略,建立了相应的数学模型,进行了相应的数学分析,采用变参数PI控制和比例-积分分离算法设计了数字PI控制器,仿真结果与实验分析证明了新控制策略的有效性。The working principle of a three-phase step-up/down AC/DC converter , which are based on three-phase voltage-type PWM AC/DC converter and C′uk DC/DC converter, was analyzed to overcome the disadvantages existing in the commonly used three-phase step-up/down AC/DC converters which can＇t directly output continuously adjustable DC voltage in a wide range. According to the principle of simple control,easy engineering implementation and low switching frequency, a new control strategy based on SVPWM was de- signed with the expansion of zero-vector for the converter. Meanwhile, the corresponding mathematical model and reasoning were also presented. And a digital PI controller was designed with variable parameters and pro- portional-integral separation. Simulation results and analysis verify the validity of the control strategy.

关 键 词：升-降压整流器 空间电压矢量调制 零矢量 数字比例积分控制器 

分 类 号：TM461[电气工程—电器]