High-accuracy series resonance high voltage power supply for electric power test

Abstract

The invention relates to a high-voltage direct current (DC) power supply. The topology of the high-voltage DC power supply (100) comprises an input side voltage stabilization capacitor (C1), a high-frequency inverter (10), an adjustable series resonance circuit (20), a high-frequency transformer (Th), a high-frequency uncontrollable rectifier (30) and an output side voltage stabilization capacitor (C2) which are sequentially connected, wherein the high-frequency inverter (10) only has three discrete control ways including positive resonance, reverse resonance and free resonance, and is simple in control strategy and rapid in output side DC voltage response; the adjustable series resonance circuit (20) additionally has the function of finely adjusting a resonant capacitor and is combined with a discrete resonance soft switch control technology, so that the DC voltage at the output side is smaller in fluctuation and higher in accuracy. The high-voltage DC power supply can be used for the DC voltage resistance and DC leakage tests of electrical equipment, a power supply of a high precision instrument and the like.

Description

technical field [0001] The invention relates to a high-voltage direct-current power supply, in particular to a high-voltage direct-current power supply with high precision and high frequency based on a resonant soft switch. Background technique [0002] In the routine test of power equipment, the test DC voltage is a unipolar continuous voltage, and the ripple factor is required to be less than 3%, while having sufficient power supply capacity. At present, most of the switching tubes of the high-voltage DC generators used in the DC test work in the hard switching state, and the electromagnetic interference is relatively large. The high voltage pulsation of the output DC test is relatively large, and the test effect is affected: It will easily damage the tested equipment when the high-voltage DC withstand voltage is high; on the other hand, the test needs to measure parameters such as DC leakage current, and its value is very small, which will cause large test errors. Conte...

AI Technical Summary

Problems solved by technology

At present, most of the switching tubes of the high-voltage DC generators used in the DC test work in the hard switching state, and the electromagnetic interference is relatively large. The high voltage pulsation of the output DC test is relatively large, and the test effect is affected: It will easily damage the tested equipment when the high-voltage DC withstand voltage is high; on the other hand, the test needs to measure parameters such as DC leakage current, and its value is very small, which will cause large test errors

Images