Analyzing and Restraining on Harmonic of the SPWM Inverter
With the increasing of switch frequency, the carrier wave frequency become higher and higher. High switch frequency can enhance the performance and decrease the output filter of power supply system. However, higher switch frequency may also bring about heavy harmonics interference. By analyzing the harmonics of the conventional SPWM inverter, a harmonics suppression method adopted frequency-hopping modulation is proposed in this paper. The carrier wave frequency of the inverter is modulated by using frequency hopping to spread the frequency spectrum and to decentralize the harmonics energy in order to decrease the amplitude of the harmonics obviously. Theoretical analysis and simulation are performed and a 1KW experimental prototype is designed. Comparative test shows that by using frequency hopping modulation, the harmonic amplitude of the SPWM inverter is about 10dB lower than the conventional one.
Shungang Xu
School of Electrical Engineering, Southwest Jiaotong University, Sichuan, China College of Physics and Information Technology, Chongqing Normal University, Chongqing, China
国际会议
2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)
成都
英文
724-727
2009-07-23（万方平台首次上网日期，不代表论文的发表时间）