Frequency Domain Calculation Of Rectifier Current Distribution

In communications, electrolysis, electroplating, iron and steel smelting, urban rail transport, the DC power supply systems are playing an important role. And its DC power supply made by a large number of rectifiers in parallel in order to obtain a large enough current to meet the industrial, scientific research needs.The internal structure of high-power rectifiers is arranged in parallel and a number of slips would inevitably produce eddy-current, so that the current distribution among them is non-uniform. Thus uniform current problems are more and more important. This paper is simulated the circuit of rectifier without considering eddy current draw in the three-phase, and then the harmonics is decomposed by Fourier transform. The model in ANSYS is to analyze the harmonic currents distributed unevenly in the different phases between in-phase and between the different slip situations. This paper demonstrates a research method of a frequency-domain calculation usd to analyze the current distribution imbalance and provides a more simple and effective way for uniform current method.