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Method and apparatus for detecting a magnetic characteristic variable in a core

一种特征参量、磁芯的技术，应用在测量装置、应用磁通控制原理的磁场测量、磁芯/磁轭等方向，能够解决复杂信号处理算法、未公知磁芯中直流分量、传感器信号高成本硬件部件等问题，达到抑制运行噪声的效果

Active Publication Date: 2013-03-20
SIEMENS ENERGY AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The measuring coil is reliable, but the processing of the measuring signal requires, on the one hand, very expensive hardware components for signal conditioning due to the signal weakness of the sensor signal and, moreover, very complex signal processing algorithms
[0011] But hitherto no satisfactory detection of DC components in magnetic cores is known in all respects

Method used

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  • Method and apparatus for detecting a magnetic characteristic variable in a core
  • Method and apparatus for detecting a magnetic characteristic variable in a core
  • Method and apparatus for detecting a magnetic characteristic variable in a core

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Embodiment Construction

[0034] figure 1A transformer 1 is shown in a schematic perspective view, equipped with a device according to the invention for detecting a magnetic direct current component. The detection of the direct current component is a prerequisite for very effective countermeasures against the direct current flux component (DC component) and the asymmetric modulation of the magnetic material that accompanies it. Noise and localized heating occurring during operation can thus be reduced.

[0035] The transformer 1 has a magnetic core 2 with three legs 6 . Each of these stems 6 carries a winding arrangement 3 . The three stems 6 are connected at the top to the upper yoke 4 and at the bottom to the lower yoke 5 in a conventional construction. According to the invention, so-called bypass portions 7 are arranged at exposed sections of the surface 14 of the upper yoke portion 4 in a directly abutting manner or at intervals. This bypass portion 7 is used for the purpose of detecting the di...

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Abstract

Method for detecting a magnetic characteristic variable, in particular the magnetic field strength (H1), in a section (L1) of a core (2) through which a magnetic flux flows, wherein part (18) of the magnetic flux is branched off from the core (2) and is guided, at least in sections, in a magnetic shunt part (7), wherein the magnetic material of the shunt part (7) is not saturated, and wherein the magnetic characteristic variable (H1) is determined from this part (18) of the magnetic flux that has been branched off or from a variable derived therefrom using a sensor and evaluation device (8, 10).

Description

technical field [0001] The invention relates to a method and a device for detecting a magnetic characteristic variable, in particular a magnetic field strength, in a section of a magnetic core passed through by a magnetic flux. Background technique [0002] In the case of electrical transformers, e.g. used in distribution networks, it may be the case that due to the intensive use of power electronic components, e.g. Considered as the current component of a direct current. Although this direct current or "DC component" is mostly only a few thousandths of the transformer's nominal current, it results in a direct current flux superimposed on the alternating current in the transformer's magnetic core. [0003] Also due to so-called "Geomagnetically Induced Currents" (GIC) a DC flux component may result in the transformer core. [0004] Modern core materials have a very high magnetic permeability and the cores are produced using the Step-Lap-Schichtverfahren method. As a resul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/07G01R33/00H01F27/38H01F27/40
CPCH01F27/38H01F27/40G01R33/0023H01F27/402G01R33/072H01F3/12G01R33/02G01R33/04
Inventor P.哈姆贝格尔A.莱克莫泽尔
Owner SIEMENS ENERGY AG
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