Abstract
This paper proposes the L-filter design method of Vienna rectifier with the DPWM(Discontinuous Pulse Width Modulation) method for satisfying the desired input current THD(Total Harmonic Distortion) specification. The input voltage waveform of Vienna rectifier with DPWM method is analyzed in this paper. The input current ripple is decided by the voltage applied to both end-points of the L-filter, which is voltage difference between the gird voltage and the input voltage of Vienna rectifier. In addition, the RMS(Root Mean Square) value of the input current ripple is derived by using on the waveform of input current ripple. In this paper, the RMS value of the input current ripple is used to design the L-filter satisfying the current THD specification of Vienna rectifier with DPWM method. The effectiveness of the proposed L-filter design method for Vienna rectifier with the DPWM method is verified through simulations and experiments.
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