High voltage and weak current step-down and current-increasing device

Abstract

The invention relates to a high-voltage weak-current voltage reducing and current increasing apparatus which comprises a front energy buffering unit, a self-adaptive high-frequency high-voltage switching unit and a pulse high-frequency transformer unit, wherein the signal input end of the front energy buffering unit is connected with a high voltage which needs to be reduced; the signal acquisition input end of the self-adaptive high-frequency high-voltage switching unit is connected with the signal output end of the front energy buffering unit; the signal input end of the pulse high-frequency transformer unit is connected with the signal output end of the self-adaptive high-frequency high-voltage switching unit; and the signal output end of the pulse high-frequency transformer unit outputs a final voltage, which is obtained after conversion, by an active supplementing capacitance pool unit for providing an active compensatory stable output for the high-voltage weak-current voltage reducing and current increasing apparatus. According to the high-voltage weak-current voltage reducing and current increasing apparatus, a weak current at the level of below 10mA can be converted, the problem of magnetic eddy current loss is solved, and the effect of final current conversion is ensured. The high-voltage weak-current voltage reducing and current increasing apparatus is applicable to convert a random high-voltage weak-current power supply at the level of over 10kV and below 10mA.

Description

technical field [0001] The invention belongs to the field of voltage transformation equipment in the electric power industry, in particular to a high-voltage weak current step-down and current-increasing device. Background technique [0002] At present, the high-voltage conversion in my country is driven by high current. For the low-current voltage conversion at the 10mA level, the problem of voltage reduction cannot be solved for a long time due to problems such as magnetic eddy current loss. Although some high-frequency transformers can achieve the purpose of step-down, the conversion efficiency is too low, generally lower than 50%, and cannot achieve practical purposes. At the same time, the step-down of 10kV voltage puts forward higher requirements for devices and winding wires. Except for a very small number of high-voltage power semiconductor devices that can work safely, 10kV is already close to its upper limit, and such high-voltage power semiconductor devices are ge...

AI Technical Summary

Problems solved by technology

[0002] At present, high-voltage conversion in my country is driven by high current. For low-current voltage conversion at the 10mA level, the problem of voltage reduction cannot be solved for a long time due to problems such as magnetic eddy current loss.

Although some high-frequency transformers can achieve the purpose of step-down, the conversion efficiency is too low, generally lower than 50%, and cannot achieve practical purposes.

At the same time, the step-down of 10kV voltage puts forward higher requirements for devices and winding wires. Except for a very small number of high-voltage power semiconductor devices that can work safely, 10kV is already close to its upper limit, and such high-voltage power semiconductor devices are generally for high-voltage The high-current switch design has a large power loss, and is not suitable for small current conditions, so it cannot complete the transformation work of high-voltage and weak current.

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