Variable-frequency resonance high-voltage adjustable power supply

A frequency conversion resonance and frequency conversion circuit technology, which is applied in electrical components, conversion devices that convert AC power input into AC power output and output power, etc. It can solve the problems of large size, high cost of isolation phase-shifting transformer, and inability to be used as a high-voltage power supply. , to achieve the effect of smooth voltage regulation and no harmonic interference

Inactive Publication Date: 2010-09-15
WUHAN ZHONGSHI ELECTRIC EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This circuit scheme has the following two problems: first, it can only be used for motor speed regulation, and cannot be used as a high-voltage power supply above 10KV; second, the isolation phase-shifting transformer of this circuit is expensive and bulky

Method used

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  • Variable-frequency resonance high-voltage adjustable power supply
  • Variable-frequency resonance high-voltage adjustable power supply
  • Variable-frequency resonance high-voltage adjustable power supply

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Embodiment Construction

[0016] In order to better understand the present invention, the embodiments of the invention will be described in detail below in conjunction with the accompanying drawings.

[0017] The invention provides a frequency conversion resonant high voltage adjustable power supply, the block diagram of the power supply circuit is as follows figure 2 As shown in , it includes a filter circuit 10 , a rectifier circuit 20 , a PWM frequency conversion circuit 30 , an isolated excitation circuit 40 and a resonant modulation circuit 50 . After the three-phase alternating current (commercial power) is input into the above-mentioned variable frequency resonant high voltage adjustable power supply, it is filtered by the filter circuit 10 and converted into direct current by the rectifier circuit 20 in sequence. A set frequency, and finally resonate with the capacitive load test circuit 60 through the resonant modulation circuit 50 to obtain an adjustable high-voltage power supply.

[0018] ...

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Abstract

The invention provides a variable-frequency resonance high-voltage adjustable power supply for converting three-phase alternating current into variable-frequency resonance high voltage. The variable-frequency resonance high-voltage adjustable power supply comprises a filter circuit, a rectifying circuit, a PWM (Pulse-Width Modulation) variable-frequency circuit, an isolating excitation circuit and a resonance modulation circuit, wherein the filter circuit, the rectifying circuit, the PWM variable-frequency circuit, the isolating excitation circuit and the resonance modulation circuit are sequentially connected. A method of converting a circuit working mode is adopted by the variable-frequency resonance high-voltage adjustable power supply, and a circuit which originally directly works in a high-voltage large-current capacitive load environment is converted to a current resonance modulation voltage-boosting resistive load working environment, so that the power supply capacity required by working is only 1 / Qth of a resonance quality factor, the voltage regulation is smooth, and a loop has no harmonic interference.

Description

【Technical field】 [0001] The invention relates to a power supply of a power system, in particular to a variable frequency resonant high voltage adjustable power supply. 【Background technique】 [0002] In order to meet the needs of equipment or devices working in a high-voltage environment, it is necessary to process the commonly used commercial power through a high-voltage power supply device and convert it into high voltage. [0003] figure 1 Shown in the current domestic and foreign multi-level (pulse) circuit structure diagram. In order to eliminate the interference of resonant wave current, the input uses an isolation transformer with a capacity greater than that of the power supply. The secondary is a plurality of phase-shifting windings. Each power unit is a low-voltage variable frequency power unit. The insulation of the series superimposed voltage between units is undertaken by the transformer winding. [0004] This circuit scheme has the following two problems: fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/451H02M1/12
Inventor 操立军王礼卿叶成
Owner WUHAN ZHONGSHI ELECTRIC EQUIP
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