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

A high-voltage pulse power supply and high-voltage pulse technology, which is applied to the components of electrical measuring instruments, measuring electricity, and measuring electrical variables, etc., can solve the problem that the output pulse width cannot be accurately controlled

CN103529255BActive Publication Date: 2016-01-13NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-01-13

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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.
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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...

Examples

Embodiment Construction

[0020] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0021] figure 1 It is a structural diagram of a high-voltage pulse power supply used for space charge measurement under an alternating electric field provided by the present invention. figure 1 Including phase control circuit 1, high voltage pulse forming circuit 2 and space charge measurement circuit PEA. Wherein, the high-voltage pulse power supply provided by the present invention includes a phase control circuit 1 and a high-voltage pulse forming circuit 2; the phase control circuit 1 includes a capacitor voltage divider, a second-order low-pass filter circuit, a voltage zero-crossing comparison circuit and a signal generator ; The high-voltage pulse forming circuit includes a high-voltage direct current source 4...