正弦波逆变器SPWM调制教学研究  

Teaching Research of Sine Wave Inverter SPWM Modulation

作　　者：刘芳[1] 李研 徐韫钰 LIU Fang;LI Yan;XU Yunyu(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《电气电子教学学报》2022年第6期92-96,共5页Journal of Electrical and Electronic Education

基　　金：国家自然科学青年基金项目(51907044)。

摘　　要：针对教学中各种SPWM调制方式难以厘清,将SPWM信号(弱电)转化为电压(强电)并统一分析存在困难等问题,先从其工程来源引出几种调制方式,对载波比为奇数及3的倍数的波形对称性进行了数学推导进而分析了各自优缺点。接着给出基本桥式变换单元并分析了在SPWM弱/强电转换中的桥梁作用,延伸出单/三相桥式逆变器并给出电压利用率计算方法,最后对倍频单极性及混合调制问题进行了扩展分析。In view of the difficulty in clarifying various SPWM modulation methods in teaching,converting SPWM signals(weak)into voltage(strong)and analyzing them in a unified manner,several modulation methods are introduced from the actual engineering applications in this paper,and waveform symmetry is mathematically derived when the carrier ratio is odd and multiples of 3,and the advantages and disadvantages of each are analyzed accordingly.Then,the basic bridge converter unit is given and its role as a bridge in the weak/strong conversion of SPWM is analyzed,the single/three-phase bridge inverter is extended,and the voltage utilization calculation is given.Finally,the difficult problems of double frequency unipolarity modulation and mixed modulation is extended and analyzed.

关 键 词：SPWM调制 对称性 基本变换单元 倍频调制 

分 类 号：G642.0[文化科学—高等教育学]