五相逆变器的空间矢量PWM控制  

SPACE VECTOR PWM CONTOR OF FIVE-PHASE INVERTER

作　　者：于飞[1] 张晓锋[1] 李槐树[1] 宋庆国[1] 

机构地区：[1]海军工程大学电气工程系,湖北省武汉市430033

出　　处：《中国电机工程学报》2005年第9期40-46,共7页Proceedings of the CSEE

摘　　要：多相逆变器由于电压矢量的增加,其空间矢量PWM(SVPWM)控制同三相电机相比具有更大的灵活性,文中通过对五相逆变器电压矢量空间的分析,认为多相逆变器空间矢量PWM 控制的线性调制范围及形成的电机定子磁通要优于三相电机。根据五相逆变器的结构特点,在传统的最近两矢量SVPWM(NTV-SVPWM)控制的基础上,提出了两种新的五相逆变器SVPWM 控制方式:最近四矢量SVPWM(NFV-SVPWM) 控制和最小开关损耗SVPWM(MSL-SVPWM)控制。推导了3 种控制方式下的目标输出电压函数及波形,通过对比分析,认为:NTV-SVPWM控制含有较大的低次谐波,不适宜用于多相控制;NFV-SVPWM 控制的输出谐波最小,MSL-SVPWM 控制的开关损耗最小,分别适用于低调制指数和高调制指数工作区。利用MATLAB 对五相同步电机调速控制系统进行了仿真研究,仿真结果验证了上述结论。The space vector PWM (SVPWM) control of multi-phase inverter has more flexibility for the additional voltage vectors. According to vectors analyzing, the advantages of multi-phase inverter SVPWM control is presented in this paper. Two new SVPWM control methods for five-phase inverter are proposed comparing to the traditional Near Two Vectors SVPWM (NTV-SVPWM) control, and here they are called Near Four Vectors SVPWM (NFV-SVPWM) control and Minimum Switch Loss SVPWM (MSL-SVPWM) control. The target voltage functions and waveforms of three kind of SVPWM are deduced and compared. The conclusions can be drawn that there are much low frequency harmonics with NTV-SVPWM control, and which is not suitable for multi-phase inverter control; NFV-SVPWM has the best harmonics performance and is fit for low modulation index operation; MSL-SVPWM has the lowest switching loss and is fit for high modulation index operation. MATLAB is adopted to simulate the five-phase variable speed system, and the simulation results validate the conclusions above.

关 键 词：空间矢量PWM控制 逆变器 五相 SVPWM控制 PWM控制方式 调速控制系统 MATLAB 三相电机 开关损耗 电压矢量 矢量空间 定子磁通 线性调制 结构特点 输出电压 对比分析 低次谐波 输出谐波 调制指数 仿真研究 同步电机 仿真结果 

分 类 号：TM301.2[电气工程—电机] TM464