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Three-phase four wire power filter

A power filter, three-phase four-wire technology, applied in the direction of inductors, fixed inductors, circuits, etc., can solve the problems of high insertion loss and achieve high insertion loss and electromagnetic interference suppression

Pending Publication Date: 2019-10-18
SHENZHEN ZHENHUA FU ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a three-phase four-wire power filter to solve the technical problem in the prior art that high insertion loss in a wide frequency range cannot be achieved

Method used

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Embodiment Construction

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is said to be "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" The orientation or positional relationship indicated by "bottom", "inn...

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Abstract

The invention provides a three-phase four wire power filter. The filter includes a phase line, a three-phase power input end and a three-phase current output end and further includes a housing, a lowfrequency common mode inductor, a high frequency common mode inductor, a first differential mode capacitor assembly, a second differential mode capacitor assembly, a first common mode capacitor assembly and a second common mode capacitor assembly, wherein the low frequency common mode inductor and the high frequency common mode inductor are respectively connected in series between the three-phasepower input end and the three-phase current output end, the first differential mode capacitor assembly is disposed between the three-phase power input end and the low frequency common mode inductor, the second differential mode capacitor assembly is disposed between the low frequency common mode inductor and the high frequency common mode inductor, the first common mode capacitor assembly is disposed between the low frequency common mode inductor and the high frequency common mode inductor, and the second common mode capacitor assembly is disposed between the high frequency common mode inductor and the three-phase current output end. The three-phase four wire power filter is advantaged in that high insertion loss in a wide wideband scope can be realized, and electromagnetic interference onthe line can be fully inhibited.

Description

Technical field [0001] The invention belongs to the technical field of filters, and more specifically, relates to a three-phase four-wire power supply filter. Background technique [0002] With the rapid development of electronic technology and microelectronic circuits, various electronic devices have formed a complex electromagnetic environment, which has caused users to pay more and more attention to the electromagnetic compatibility of products, and then they are widely used in the whole machine and system. Power EMI (Electromagnetic Interference, electromagnetic interference) filters, and power EMI filter signals have a very wide spectrum. [0003] The current power supply EMI filter usually uses a single-stage filter circuit. Because the inductor material has many specifications, the filtering frequency bands for different magnetic materials are different, so the current power supply EMI filter cannot achieve high insertion in a wide frequency range. Attrition, unable to meet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H01F17/06H01F27/28
CPCH02J3/01H01F17/062H01F27/2823H01F2017/0093H01F2017/065Y02E40/40
Inventor 李凯文肖倩黎燕林朱建华李金辉唐钦林赵海霞
Owner SHENZHEN ZHENHUA FU ELECTRONICS