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Coupling inductor and power converter

A technology of power converter and coupled inductance, applied in the direction of inductor, transformer/inductor core, output power conversion device, etc. Satisfy the problems of system stability, total harmonic current distortion rate, etc., to achieve the effect of improving performance and increasing leakage inductance

Active Publication Date: 2014-09-03
HUAWEI DIGITAL POWER TECH CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the small inductance of the leakage inductance of the coupled inductor, which is equivalent to the small inductance of the filter inductor, it cannot meet the requirements of system stability, ripple current, and input line when the coupled inductor is connected to the power converter. Performance requirements such as Total Harmonic Distortion of current on input (THDi)

Method used

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  • Coupling inductor and power converter
  • Coupling inductor and power converter
  • Coupling inductor and power converter

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] The embodiments of the present invention are applied to multilevel power converters using interleaved parallel technology. The embodiments of the present invention do not limit the level levels of the multilevel power converters. For example, the multilevel power converters can be two-level Power converter, three-level power converter or five-level power converter, etc. The embodiment of the present invention does not limit the type of the multileve...

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Abstract

The invention provides a coupling inductor and a power converter. The coupling inductor comprises a magnetic core and at least two windings. The magnetic core comprises at least two first magnetic columns, at least one second magnetic column and two opposite magnet yokes. The at least two first magnetic columns and the at least one second magnetic column are arranged between the two opposite magnet yokes. The at least two windings are wound on the at least two first magnetic columns respectively. The at least two windings and the at least two first magnetic columns correspond in a one-to-one mode. According to the coupling inductor, by adding the second magnetic column between the two opposite magnet yokes, the leakage inductance of the coupling inductor is increased, and accordingly the requirement for system stability is met when the coupling inductor is connected into the power converter.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a coupling inductor and a power converter. Background technique [0002] At present, multilevel power converters using interleaved correlation technology are widely used. This multilevel power converter includes multiple power bridge arms connected in parallel, and the multiple power bridge arms are coupled through multiple windings or coils in the coupled inductor, and operate in an interleaved manner. This interleaved parallel technology can reduce the output ripple current and increase the output switching frequency, so it can reduce the inductance of the output filter inductor, thereby reducing the volume and cost of the inductor. [0003] In order to meet the system stability requirements of the multilevel power converter, it is usually necessary to set a filter inductor to provide sufficient inductance of the filter inductor. Since the coupled inductor can generate leakage inducta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F1/12H01F17/04H02M1/00
CPCH02M1/00H01F3/12H01F38/08H01F2003/106G05F3/02H01F27/255
Inventor 刘云峰叶飞胡炎申
Owner HUAWEI DIGITAL POWER TECH CO LTD
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