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The High Voltage Rectifier Based on Star-Point Regulation

The star-point structure of three-phase transformer can be applied in the high voltage rectifier, and it will bring great conveniences to the control and design of rectifiers for its lower voltage rating requirement to thyristors and the lower insulation requirement to inductors, which lead to the smaller size and more economic cost. Moreover, the operation of the inductor in the lower voltage side of the transformer will hardly affect the output DC voltage while the load is switched in and out from the power, which then can realize the high steep edge of output voltage and high repetitive pulsed power supplies. The theoretical analysis is presented in this paper. A high voltage DC power supply prototype based on star-point structure is built. The simulations and experiments validate the analysis and show that the star-point structure is simple and takes great advantages to the high voltage rectifiers