逆變電源的諧波分析及抑制方法

本文以400Hz 的SPWM 逆變電源為例,分析了逆變電源輸出電壓和電流諧波,提出了有效
的諧波抑制策略,該策略包括正確選擇載波頻率、注入適當?shù)闹C波和設(shè)計合適的濾波器,并用MATLAB 對電源系統(tǒng)進行了仿真，通過對輸出電壓做FFT 分析，得到了輸出電壓的THD值，驗證了所采取的消除諧波的方法的可行性。
關(guān)鍵詞：SPWM；逆變電源；諧波；濾波器
Abstract：This paper analyzed the inverter power output voltage and current harmonics in the 400 Hz SPWM inverter power. The effective harmonic suppression strategies are presented in the? paper. These strategies include a proper choice of carrier frequency, harmonic injection of appropriate design and suitable filters. The THD value of the output voltage are get by using MATLAB software for the simulation of the system and the FFT analysis of output voltag.. The results proved the feasibility of the strategies.
Keywords: SPWM; inverter power supply; harmonic; filter