基于PWM整流器的SVPWM谐波分析新算法

根据SVPWM的工作机理并结合数字实现的特点，给出了一种基于PWM整流器的SVPWM新型谐波分析算法。该算法通过傅里叶分析给出输出相电压各次谐波的解析表达式，为设计PWM整流器的网侧滤波电感提供依据和指导。由于PWM整流器交流侧相电压的谐波频谱不仅与脉冲调制方式有关，还受到闭环调节器参数的影响，因此该文搭建了以TMS320F2812为控制核心的三相电压型逆变器系统以得到单纯由SVPWM产生的谐波频谱，并对该算法进行验证。相电压谐波频谱由功率分析仪PZ4000测量得到，分析结果与计算结果吻合得很好，证明了该算法的准确性。

A Novel Algorithm of SVPWM Harmonic Analysis Based on PWM Rectifier

According to the operational principle of SVPWM and considering the characteristics of digital implement, a novel algorithm of SVPWM harmonic analysis based on PWM rectifier is proposed. This algorithm gives the expression of phase voltage harmonics through Fourier analysis, which provides the guidance for the design of grid side inductance. Since the harmonic spectrum of ac-side phase voltage of PWM rectifier is influenced not only by pulse modulation style, but also by the parameters of close-loop adjustors, a three-phase voltage source inverter controlled by TMS320F2812 has been built to obtain the harmonics purely generated by SVPWM and verify the algorithm. Power analyzer PZ4000 has been adopted to acquire experimental results. The good agreements between experimental results and those obtained in calculation demonstrate the accuracy of this algorithm.