Toroidal Fluxgate Current Transducer

A technology of current transducers and fluxgates, applied in the direction of inductors, voltage/current isolation, magnetic field measurement using the principle of magnetic flux control, etc., can solve the problems of increasing manufacturing costs, achieve reliable and stable layout, and simplify the sense of Measuring the effect of unit assembly

Active Publication Date: 2015-10-28
莱姆电子(中国)有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The sensitivity of the fluxgate transducer also results in tighter manufacturing tolerances for the relative positions of the coils and components, which also results in increased manufacturing costs

Method used

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  • Toroidal Fluxgate Current Transducer
  • Toroidal Fluxgate Current Transducer
  • Toroidal Fluxgate Current Transducer

Examples

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Embodiment Construction

[0032] Referring to the accompanying drawings, first from Figures 1a to 1d Initially, a current transducer 2 according to an embodiment of the invention comprises a housing 4, a fluxgate sensing unit 6 mounted in the housing, a signal processing circuit 8, for example comprising a printed circuit board 7, which also Mounted in the housing and having electrical terminals 18 extending through the housing for connection to an external circuit for power supply and an output for the measurement signal. The transducer may comprise a central channel 16 through which a conductor or conductors 20, 20a, 20b carrying the current to be measured extend. The current to be measured will be called the primary current and the conductor will be called the primary conductor. The transducer also comprises an inner magnetic shield 12 and an outer magnetic shield 10 positioned radially inwardly and radially around the fluxgate sensing unit 6, respectively. The magnetic shields 10, 12 may advanta...

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Abstract

Toroidal fluxgate current transducer comprising a ring shaped fluxgate sensing unit (6) comprising a ring-shaped support (40), a saturable magnetic core (38) mounted on the support (40), an excitation coil (44) wound around the support and saturable core and a magnetic shell (32) mounted around the excitation coil, ring-shaped support and saturable core. The support is ringed-shape and comprises terminals (50,48) fixed to the support, a first pair of said terminals connected to ends of the excitation coil, and a second pair of said terminals connected to ends of a secondary coil of the current transducer.

Description

[0001] This application is a divisional case of an invention application with an application date of August 19, 2011, an international application number of PCT / IB2011 / 053655, a national application number of 201180040922.X, and an invention title of "Toroidal Fluxgate Current Transducer" Apply. technical field [0002] The present invention relates to toroidal fluxgate current transducers with secondary coils for closed loop applications. Background technique [0003] A fluxgate transducer has a saturable magnetic core surrounded by an excitation coil that applies an alternating magnetic field that alternately saturates the core. In the presence of an external magnetic field, a bias voltage is applied to the saturation of the saturable core such that the symmetry of the excitation signal is achieved. This asymmetry is related to the magnitude of the external magnetic field and is therefore used to read the magnitude of the external magnetic field. In a magnetometer, the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/18G01R33/04H01F38/30
CPCG01R33/0017G01R1/04G01R15/185G01R33/04H01F27/2895H01F38/30
Inventor C·古德尔B·马科兹B·理查德G·格里
Owner 莱姆电子(中国)有限公司
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