| Abstract |
In this paper, a novel method for reducing harmonics involved in ac line currents of a double
connected voltage source three-phase diode rectifier is proposed. This proposed method is based on
a conventional 12-step diode rectifier. By adding an auxiliary circuit composed of a single-phase
transformer and four diodes on the dc side, input voltage waveforms in the proposed circuit can output
almost 24-step voltages, which correspond to the conventional 24-step diode rectifier. In this paper,
circuit performances of the proposed method are discussed by analyzing waveforms, and optimum
parameters are derived. Then effects on harmonics reductions can be clarified by experimental
results. |
