一种基于逻辑判断的SVPWM过调制算法  

SVPWM Over-modulation Algorithm Based on Logical Judgement

作　　者：盛明磊 周杨 刘闯[1] 谢敏求 胡耀华[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016 [2]南京南车浦镇车辆有限公司,南京211899

出　　处：《微电机》2017年第11期39-44,49,共7页Micromotors

基　　金：国家自然科学基金(51377076);江苏省"六大高峰人才"项目

摘　　要：过调制能够有效地提高直流母线电压利用率,进而提高逆变器输出电压,但传统的SVPWM过调制算法需要经过复杂的三角计算或查表,实现方式困难。针对此问题,提出一种基于逻辑判断的过调制算法(LG-SVPWM),可以统一处理两个过调制区域,无需计算保持角,且易于实现。在整个调制区域,能够实现逆变器从线性调制区到六阶梯波的平滑过渡,并且输出电压谐波含量低。理论分析和实验结果表明,该算法具有实现简便以及输出电压谐波含量低的优点,适合应用于永磁同步电动机矢量控制系统中。The utilization of DC bus voltage can be effectively improved with over-modulation which can fur- ther enhance the fundamental voltage of the inverter. It needs complex trigonometric calculation or look-up table for traditional SVPWM over-modulation algorithm, which is not easy to implement. A SVPWM over- modulation algorithm based on logical judgement for SVPWM inverters was presented, which can uniformly deal with two over-modulation regions. The algorithm needs not to calculate hold angle, and was effortless to implement. The inverter can transit from the linear operation to the six-step operation smoothly in the whole over-modulation region. Theoretical analysis and experimental results indicate that the algorithm is conven- ient and with low total harmonic distortion of the output voltage , feasible for application in permanent magnet synchronous motor vector control system.

关 键 词：过调制 LG-SVPWM 电压源型逆变器 电压利用率 永磁同步电动机 

分 类 号：TM341[电气工程—电机] TM35