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High power factor three phase rectification circuit

A high power factor, three-phase rectification technology, applied in the field of three-phase rectifier circuits and high-power factor three-phase rectifier circuits, can solve the problems that the rectifier circuit cannot suppress harmonic current and the power factor is low, so as to improve the grid-side power factor, suppression of harmonic current, high efficiency

Active Publication Date: 2014-05-21
上海儒竞自动控制系统有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a high power factor three-phase rectifier circuit, which is used to solve the problems that the rectifier circuit in the prior art cannot suppress harmonic current and low power factor

Method used

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  • High power factor three phase rectification circuit

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Embodiment Construction

[0027] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] Please refer to attached picture. It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be change...

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Abstract

The invention provides a high power factor three phase rectification circuit comprising a three phase AC power grid, a filter circuit, a rectifier circuit, and a switch circuit; the three phase AC power grid is used for providing power for a whole three phase controllable rectification circuit, and comprises three live lines; the filter circuit is used for filtering AC current outputted by the three phase AC power grid, and comprises three filter inductors; the rectifier circuit is used for converting AC voltage inputted by the filter circuit to DC voltage, and comprises a diode rectifier bridge, two electrolytic capacitors and two stabilization resistors; the switch circuit is used for compensating harmonic wave current, so the harmonic wave current waveform can approach to a sine waveform, and comprises three bidirectional controllable switches and two reverse-conducting switches. The high power factor three phase rectification circuit can limit the harmonic wave current, and improves net side power factors.

Description

technical field [0001] The invention belongs to the application field of power electronic conversion, and relates to a three-phase rectification circuit, in particular to a high power factor three-phase rectification circuit. Background technique [0002] For AC-powered power electronic converters, such as high-power household inverter air conditioners, the front stage is a three-phase rectifier, the rear stage is an inverter circuit, and the inverter is connected to a compressor. On the AC side of the entire system, very Serious harmonic current problems, including low-order harmonic current and high-order harmonic current, pollute the electromagnetic environment of the surrounding and power grid, and cause a lot of harm in severe cases. For this reason, harmonic current suppression technology is required. [0003] At present, most harmonic current suppression technologies use active technology. Through active control technology, a higher or even 1 grid-side power factor ca...

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Application Information

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IPC IPC(8): H02M1/12H02M1/42
CPCY02B70/10
Inventor 刘智翎刘极上王立军李华武王祺王立新
Owner 上海儒竞自动控制系统有限公司
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