Electromagnetic interference filter applicable to high-voltage Hall sensors

A technology of Hall voltage and electromagnetic interference, which is applied in the filter field to achieve the effects of shortening the grounding wire loop of the chassis, high inductance, and compact structure

Active Publication Date: 2015-06-10
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an electromagnetic interference filter suitable for high-voltage Hall voltage sensors, which increases its inductance, strengthens the filtering effect, and solves the problems of electrical gaps and insulation between high-voltage input cables

Method used

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  • Electromagnetic interference filter applicable to high-voltage Hall sensors
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  • Electromagnetic interference filter applicable to high-voltage Hall sensors

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Embodiment 1

[0031] Such as Figure 1-Figure 3 As shown, the invention of this example is an electromagnetic interference filter suitable for high-voltage Hall voltage sensors, which includes a common-mode filter inductor L1, a sampling signal input and output loop to the common-mode suppression capacitor C1, C2 of the casing, and the sampling signal. Differential mode suppression capacitor C3; the common mode filter inductor L1 includes a buckle magnetic ring 1 and a winding wire arranged on the printed circuit board 5, and the winding wire passes through its axis along the axial direction of the buckle magnetic ring 1 Wind the buckle magnetic ring 1 to the hollow part and in the same direction.

[0032] The whole of the filter is realized on the printed circuit board 5, and the printed circuit board 5 is an inverted concave-shaped board; the buckle magnetic ring 1 is arranged above the recess of the printed circuit board A cuboid is provided with a cylindrical hollow body in the axial d...

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PUM

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Abstract

The invention relates to an electromagnetic interference filter applicable to high-voltage Hall sensors. The electromagnetic interference filter comprises a common-mode filter inductor L1, common-mode suppression capacitors C1 and C2 of a sampled signal input and output circuit-pair housing case and a differential-mode suppression capacitor C3. The differential-mode suppression capacitor C3 is arranged between the sampled signals; the common-mode filter inductor L1 comprises a button type magnetic ring and a winding, and the winding is arranged on a printed circuit board, penetrates an axial hollow portion of the magnetic ring along the axial direction of the magnetic ring and is wound around the magnetic ring according to the identical direction. The electromagnetic interference filter has the advantages that induction of the filter can be increased, filter effects can be enhanced, and problems in the aspects of electric clearance between high-voltage input cables, insulation and the like can be solved.

Description

Technical field: [0001] The invention relates to a filter, in particular to an electromagnetic interference filter suitable for a high-voltage Hall voltage sensor. Background technique: [0002] In electronic product equipment, the Hall voltage sensor is usually used to detect the voltage. In order to suppress or attenuate the influence of the electromagnetic interference signal on the analog sampling signal, the necessary anti-interference is usually taken on the secondary side of the Hall voltage sensor and the input port of the controller. Measures, in order to cope with the harsh electromagnetic interference environment, this application adds a circuit to deal with electromagnetic interference on the primary side of the Hall voltage sensor, so that after the interference signal passes through the secondary side of the Hall voltage sensor, it can be attenuated by the filter at the input port of the controller To the minimum, thereby improving the controller's anti-electro...

Claims

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Application Information

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IPC IPC(8): H03H7/01H01F17/06H05K1/16
Inventor 赵忠玲韩天绪赵刚王柯武丹孙淼
Owner STATE GRID CORP OF CHINA
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