Research and Implementation of a Novel DC High Voltage Power Supply

Abstract:- The high voltage power supply is widely used in various fields. The paper presents detailedly the topology, the operation and the key techniques of a high precise direct current (DC) negative high voltage power supply. To enhance the power factor of input side and the voltage precision of output side, the power supply uses BOOST converter for power factor correction and voltage regulation. It converts DC to high frequency (HF) alternating current (AC) square wave with phase-shifted full bridge. The voltage of the AC square wave is boosted by HF transformer, then the HF high voltage AC square wave is double rectified to DC high voltage output. The HF high voltage transformer, which is designed and manufactured with special material—polytetrafluoro ethylene (F4) and special technique, solves several technical difficulties including influence of distributing parameters and insulation, and meets demands of high frequency, high voltage and high power. The supply’s output voltage is 25kV and its maximal output current is 100mA.The experimental result shows the power supply has high input power factor, stable output voltage and small ripple. Key-Words:- Power supply high voltage Boost Transformer ZVS phase-shifted control