A High-Voltage Pulse Power Supply for Space Charge Measurement in AC Electric Field

Abstract

The invention discloses a high-voltage pulse power supply for measuring the space charge under an alternating-current electric field, and belongs to the field of a control circuit design of the high-voltage pulse power supply. The high-voltage pulse power supply comprises a phase control circuit and a high-voltage pulse forming circuit, wherein the phase control circuit comprises a capacitive voltage divider, a second-order low-pass filtering circuit, a voltage zero-crossing comparison circuit and a signal generator; and the high-voltage pulse forming circuit comprises a high-voltage direct-current source, a charging resistor, a coaxial cable, a switch and a matching resistor. The high-voltage pulse power supply disclosed by the invention has the advantages that simulation and design of an electronic circuit, a power electronic device MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) control technology and a pulse power technology are combined, and the design scheme uses a high-voltage direct-current source module without using a pulse transformer, so that the technical difficulty that the requirement for the frequency response characteristic of the transformer is high is avoided and simultaneously the economic cost of the transformer additionally bought is reduced; and the pulse width and the frequency of output pulse of the high-voltage pulse power supply are flexibly adjusted by changing the length of the pulse forming line and setting a pulse-string output function of the signal generator.

Description

technical field [0001] The invention belongs to the field of high-voltage pulse power supply control circuit design, in particular to a high-voltage pulse power supply used for space charge measurement under an AC electric field. Background technique [0002] Most of the existing pulse power supplies are low-voltage output or low-frequency output, and there are few power supplies that realize high-voltage and high-frequency at the same time. The existing technology cannot realize the flexible control of the output pulse width of the power supply, and the existing technology is not easy to control the high-voltage high-frequency pulse through external circuits. The power supply is effectively controlled. [0003] At present, in a patented controllable high-frequency high-voltage power supply, a relay is used to control the output pulse of the high-frequency high-voltage DC-DC converter. The disadvantage is that the output of the high-voltage high-frequency power supply cannot...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the width of the output pulse cannot be accurately controlled in the existing high-frequency pulse power supply mentioned in the background technology, the present invention provides a high-voltage pulse power supply for space charge measurement under an AC electric field

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