三相电压源逆变器三种方波调制算法的仿真分析(上)

Analysis of Three Square-wave Modulation Algorithms for Three-phase Voltage Source Inverter by Means of Simulation

根据桥臂中点目标电压波形的不同,三相电压源逆变器具有多种调制方式,如方波调制、梯形波调制、SPWM调制和SVPWM调制等。本文从学习的角度,采用仿真方法分析了三相电压源逆变器采用方波调制时120°、150°和180°导电方式的工作原理,并进行了简单的比较分析。

With different target waveforms of the midpoint of the bridge legs, three-phase voltage source inverter （VSI） has various types of modulation algorithms, such as square- wave modulation, trapezoidal-wave modulation, SPWM modulation and SVPWM modula- tion. From the point of view for study, the paper presents the operation principle analysis of three-phase voltage source inverter when square-wave modulation with 120℃ conduction, 150℃ conduction and 180℃ conduction by means of simulation, respectively. Then a brief comparative analysis is also provided.