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Power transformer with one-way flux compensation function

A power transformer and flux compensation technology, applied in the field of power transformers, can solve problems such as easy interference and consumption, and achieve the effects of reducing working noise radiation, small heat load, and low working temperature

Active Publication Date: 2014-07-23
西门子能源全球两合公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of actuator consumes a lot of energy during work; in addition, it is also easy to interfere and consume

Method used

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  • Power transformer with one-way flux compensation function
  • Power transformer with one-way flux compensation function
  • Power transformer with one-way flux compensation function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] in figure 1 Shown therein is a power transformer 20 with a housing 7 having a transformer core 4. The structure of the magnetic core 4 corresponds to the known structure of three magnetic core legs, which has three magnetic core legs 21, 22, 23 and a transverse yoke 32. There is usually a primary winding 1 and a secondary winding 2 on each magnetic core leg 21, 22, 23.

[0034] According to the present invention, a compensation winding 3 is also provided on the outer magnetic core legs 21 and 23. in figure 1 In the area of ​​the first magnetic core column 21, the arrow 5 is used to indicate the magnetic "unidirectional flux". For this magnetic "unidirectional flux" 5, it is considered that it is caused by the "direct current component" (DC component) flowing through the primary side or the secondary side. But this "unidirectional flux" may also be incorporated into the geomagnetic field. "Unidirectional flux" or "direct current" should be understood here as a physica...

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PUM

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Abstract

A power transformer with the one-way flux compensation function is characterized in that the transformer (20) is provided with a soft magnetic core (4), the soft magnetic core (4) is provided with a primary winding device (1), a secondary winding device (2) and a compensation winding device (3), the compensation winding device (3) is connected with current control devices (12 and 13), the current control devices feed compensation currents (16 and 17) into the compensation winding device (3) according to control signals (14 and 15), and the compensation currents (16 and 17) are used for offsetting one-way flux (5) in the magnetic core (4). The control signals are provided by a magnetic field measuring device (30) according to measurement on flux related to currents in the primary winding device or the secondary winding device.

Description

[0001] [0002] This application is a divisional application of the invention patent application with the application number 200780053317.X, the application date is June 12, 2007, and the invention title is "power transformer with unidirectional flux compensation". technical field [0003] The present invention relates to a power transformer with unidirectional flux compensation. Background technique [0004] It is known that in power transformers operating in conjunction with converters, due to inaccuracies in the control of the power semiconductor switches, a current component can arise which is superimposed on the operating current of the transformer. This current component, which can be regarded as direct current with respect to the grid, is also referred to below as "direct current component" or "DC component". Most of them are only a few thousandths of the rated current of the transformer, but a unidirectional magnetic flux is generated in the magnetic core of the tra...

Claims

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Application Information

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IPC IPC(8): H01F27/34H01F27/38
Inventor P.哈姆伯格A.莱克莫泽
Owner 西门子能源全球两合公司
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