Three-phase controllable rectifier circuit

A rectifier circuit and three-phase AC technology, which is applied in the direction of electrical components, climate sustainability, high-efficiency power electronic conversion, etc., can solve the problems of harmonic current and low power factor, and achieve simple circuit structure, improved power factor, DC The effect of voltage stabilization

Active Publication Date: 2017-07-28
上海儒竞电控技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a three-phase controllable rectifier circuit for solving the problems of serious harmonic current and low power factor found in the active technology in the prior art

Method used

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  • Three-phase controllable rectifier circuit
  • Three-phase controllable rectifier circuit

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Embodiment 1

[0034] This embodiment provides a three-phase controllable rectification circuit, such as figure 1 As shown, the three-phase controllable rectification circuit includes: a three-phase AC grid 1 , a filter circuit 2 , a rectification circuit 3 , and a correction circuit 4 . The three-phase AC grid 1 includes a first live wire Ua, a second live wire Ub, and a third live wire Uc. The filter circuit includes three filter inductors, namely a first filter inductor L1, a second filter inductor L2, and a third filter inductor L3. The rectifier circuit 3 includes a diode rectifier bridge B1, an electrolytic capacitor E1, and a stabilizing resistor R1, and the diode rectifier bridge B1 has three bridge arms, namely a first bridge arm, a second bridge arm, and a third bridge arm . The correction circuit 4 includes a first bidirectional controllable switch BDS1, a second bidirectional controllable switch BDS2, a third bidirectional controllable switch BDS3, a first AC capacitor C1, a se...

Embodiment 2

[0049] This embodiment provides an application circuit of a controllable rectification circuit, such as figure 2 As shown, the application circuit includes a three-phase AC grid 1 , a filter circuit 2 , a rectifier circuit 3 , and a correction circuit 4 . The three-phase AC grid 1 includes a first live wire Ua, a second live wire Ub, and a third live wire Uc. The filter circuit includes three filter inductors, namely a first filter inductor L1, a second filter inductor L2, and a third filter inductor L3. The rectifier circuit 3 includes a diode rectifier bridge B1, a first electrolytic capacitor E1, a second electrolytic capacitor E2, a first stable resistor R1, and a second stable resistor R2, and the diode rectifier bridge B1 has three bridge arms , that is, the first bridge arm, the second bridge arm, and the third bridge arm. The correction circuit 4 includes a first bidirectional controllable switch BDS1, a second bidirectional controllable switch BDS2, a third bidirec...

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Abstract

A three phase controllable rectification circuit comprises a three phase AC power grid, a filter circuit, a rectifier circuit, and a correcting circuit; the three phase AC power grid is used for providing power for the whole three phase controllable rectification circuit and comprises three live lines; the filter circuit is connected with the three phase AC power grid, used for filtering AC current outputted by the three phase AC power grid, and comprises three filter inductors; the rectifier circuit is connected with the filter circuit, used for converting the AC current inputted by the filter circuit into DC current, and comprises a diode rectifier bridge, an electrolytic capacitor and a stabilization resistor; the correcting circuit is connected with the filter circuit and the rectifier circuit, used for correcting network side power factors, and comprises three bidirectional controllable switches and three AC capacitors. The three phase controllable rectification circuit is simple in structure and control, can improve network side power factors, and limits harmonic wave current.

Description

technical field [0001] The invention belongs to the technical field of power electronics and relates to a rectifier circuit, in particular to a three-phase controllable rectifier circuit. Background technique [0002] For power electronic converters with three-phase AC power supply, 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, there will be 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, the harmonic current suppression technology of the three-phase power supply rectification system can adopt the fully active technology with good effect...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02M7/219H02M1/12H02M1/42
CPCY02B70/10
Inventor杨兴华王立军吴伦兵颜道丹张联柱田雨
Owner上海儒竞电控技术有限公司