Design of Output LC Filter and Low Order Harmonics Suppression in High Power 400Hz Inverter
Liu Chunxi1, 4, Ma Weiming2, Sun Chi2, Hu Wenhua3, Nie Ziling2
1. Zhejiang University Hangzhou 310027 China 2. Naval University of Engineering Wuhan 430033 China 3. Huazhong University of Science and Technology Wuhan 430074 China 4. Liaoning Technical University Huludao 125105 China
Abstract：In order to suppress harmonics content in high power medium frequency 400Hz/115V inverters, the mathematical expression for carrier phase-shifted sinusoidal pulse width modulation (SPWM) waveform based on the cascaded topology with two H-Bridge units is derived. Then fundamental and each order harmonic’s content can be obtained accurately, so the LC filter design has a theoretical base. The output LC filter is designed to eliminate high-order modulation harmonics simultaneously considering the fundamental voltage drop across the filter inductor, the inductor current ripple and reactive capacity. Fundamental resonant control and the 3rd, 5th and 7th resonant control is adopted in inner loop and outer loop, respectively, which can eliminate steady-state error and compensate the 3rd, 5th and 7th harmonics. The simulations and experiments verify the effectiveness of the proposed scheme.
刘春喜, 马伟明, 孙驰, 胡文华, 聂子玲. 大容量400Hz逆变器输出LC滤波器设计和低次谐波抑制[J]. 电工技术学报, 2011, 26(6): 129-136.
Liu Chunxi, Ma Weiming, Sun Chi, Hu Wenhua, Nie Ziling. Design of Output LC Filter and Low Order Harmonics Suppression in High Power 400Hz Inverter. Transactions of China Electrotechnical Society, 2011, 26(6): 129-136.
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2011, Vol. 26 
