A digital high voltage DC power

Abstract

The utility model relates to a digitized high voltage direct current power supply, and comprises a main power circuit, a digitized control circuit based on DSP and a control program of host computer based on PC, wherein the main power circuit comprises a three phase rectifying element [1], a soft start element [2], a filter element [3], a resonance inverting element [4], a high frequency and high voltage transformer [5], a doubling circuit [6] and a two-stage voltage divider [7]; the digitized control circuit based on DSP comprises an interface circuit of IPM drive signal, a high voltage feedback element, a resonance overcurrent protection element, a soft start circuit and a serial communication interface circuit. The voltage of power frequency electrical network is converted into DC voltage which is used as busbar voltage by three phase rectification, soft start and filter, and the busbar voltage is converted into 20KHz quasi-sine-wave by the resonance inverting element which is driven by a phase difference computed by the DSP according to feedback signal, and then 0-100Kv AC high voltage is output by the high frequency and high voltage transformer [5] and the doubling circuit [6]. The utility model adopts a host computer as a control device, and outputs the voltage via the control instructions of the DSP, therefore meets the requirements of voltage withstand test of insulation material.

Description

technical field [0001] The invention relates to a high-voltage direct current power supply, in particular to a fully digital high-voltage direct current power supply used for the withstand voltage test of insulating materials. Background technique [0002] Insulation materials have always been a key factor limiting the voltage level, volume and life of the equipment in high-voltage equipment, and the withstand voltage test is the most intuitive method to test the insulation properties of materials. The withstand voltage experiment requires accurate control of the output voltage amplitude, rise rate, holding time, etc., and involves insulation and interference issues. The traditional high-voltage DC power supply for experiments is obtained by directly boosting, rectifying and filtering through a power frequency transformer, which has disadvantages such as large size, low efficiency, large ripple coefficient, and troublesome operation. Since the 1970s, with the development of...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of inflexible voltage regulation methods and insufficient voltage levels in the prior art, and propose a fully digitally controlled high-voltage DC power supply to meet the requirements of insulation material withstand voltage experiments

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