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Magnet core, production method thereof, and its use in current transformers and current-compensated inductors

A technology of choke coils and magnetic cores, applied in the manufacture of magnetic cores, inductors with magnetic cores, inductors/transformers/magnets, etc., can solve problems such as high material prices, and achieve simple structures and low temperature dependence Effect

Inactive Publication Date: 2008-04-02
VACUUMSCHMELZE GMBH & CO KG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A serious problem from the point of view of manufacturers competing in the market of energy counters is the cost of the magnetic material to be applied, since the alloys applied so far contain around 80 atomic % Co, which leads to higher material prices

Method used

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  • Magnet core, production method thereof, and its use in current transformers and current-compensated inductors
  • Magnet core, production method thereof, and its use in current transformers and current-compensated inductors
  • Magnet core, production method thereof, and its use in current transformers and current-compensated inductors

Examples

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Embodiment Construction

[0081] The field of application of the "current transformer with DC tolerance of an electronic energy counter" is examined as an example below. In related analyzes it has been shown that it is not possible to meet the requirements of the standard series IEC 62053 for the DC tolerance in the classical current transformers with a highly magnetically permeable core known for a long time. These requirements for electronic household counters with direct connection are decisive standard requirements, energy detection must also be possible in the presence of half-wave rectified (ie purely unipolar) sinusoidal currents.

[0082] Classical current transformers fail here because the highly permeable core saturates very quickly through the established unipolar flux. As the magnetic permeability of the core material decreases, the time constant of the flux sabfall also decreases with the inductance, so that a solution to the problem in the use of low magnetic permeability amorphous alloys...

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Abstract

Disclosed is a magnet core which comprises a linear B-H loop, has a high modulability with alternating current and direct current, a relative permeability of more than 500 but less than 15,000, and a saturation magnetostriction lambdas of less than 15 ppm, and is made of a ferromagnetic alloy, at least 50 percent of which consist of fine crystalline parts having an average particle size of 100 nm or less (nanocrystalline alloy) and which is characterized by formula FeaCobNicCudMeSifBgXh, wherein M represents at least one of the elements V, Nb, Ta, Ti, Mo, W, Zr, Cr, Mn, and Hf, a, b, c, d, e, f, g are indicated in atomic percent, X represents the elements P, Ge, C and commercially available impurities, and a, b, c, d, e, f, g, h satisfy the following conditions: 0 <= b <= 40; 2 < c < 20; 0.5 <= d <= 2; 1 <= e <= 6; 6.5 <= f <= 18; 5 <= g <= 14; h < 5 atomic percent; 5 <= b + c <= 45, and a + b + c + d + e + f = 100.

Description

technical field [0001] The invention relates to a magnetic core with high modulability for alternating and direct current components, a method for producing such a magnetic core, and the use of such a magnetic core in particular in current transformers and current-compensated choke coils applications, and the alloys and strips used to make such cores. Background technique [0002] In numerous applications of magnetic cores, a high modulability for the AC and DC components is required, wherein application-specific modulators are required for each of the AC and DC components. For example in current transformers and current compensated choke coils there are applications for magnetic cores with high modulability for the AC and DC components. [0003] Current-compensated interference suppression chokes are described, for example, in DE-A 35 26 047 and DE 195 48 530 A1. Current-compensated interference suppression chokes have two windings for single-phase applications and three ...

Claims

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Application Information

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IPC IPC(8): H01F1/153H01F41/02H01F17/06H01F1/00
CPCH01F1/0045H01F1/15308B82Y25/00H01F41/0206H01F1/15333H01F1/0063H01F1/147H01F1/153H01F41/02
Inventor G·赫尔策尔D·奥特
Owner VACUUMSCHMELZE GMBH & CO KG
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