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Magnetic core having effective magnetic polarization and magnetic device using same

A magnetic core and permanent magnet technology, applied in the direction of inductors with magnetic cores, magnetic cores/yokes, transformers/inductor cores, etc., can solve problems such as the reduction of saturation magnetic flux density

Inactive Publication Date: 2002-04-10
TOKIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the above method is not enough to prevent the reduction of the saturation magnetic flux density due to the size reduction of the magnetic core.

Method used

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  • Magnetic core having effective magnetic polarization and magnetic device using same
  • Magnetic core having effective magnetic polarization and magnetic device using same
  • Magnetic core having effective magnetic polarization and magnetic device using same

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Experimental program
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Embodiment Construction

[0018] refer to image 3 , to introduce the magnetic device of the first embodiment of the present invention.

[0019] image 3 The illustrated magnetic device includes a magnetic core 10 . The magnetic core includes a drum-shaped core block of circular cross-section. The magnetic core 10 has a "winding core part" of a cylindrical outer circular surface and a pair of flange parts 12 and 13. The flange parts are integrally connected to the axially opposite ends of the winding core part 11 and extend along the radial direction of the winding core part 11. Protruding outwardly.A flange portion 12 is provided with permanent magnets 14 attached to the outer surface.

[0020] The permanent magnet 14 extends along the circumferential direction to form a ring whose center is located on the center line of the winding core 11 , and the ring is located in the radial area outside the outer circular surface of the winding core 11 . The permanent magnet 14 of the above-mentioned shape i...

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PUM

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Abstract

A magnetic core (10) is provided with a flange portion (12) protruding outward in a radial direction perpendicular to a center axis (19) of the winding core portion (11). The winding core portion has an outer peripheral surface (11a) which surrounds the center axis to have a first distance (d1) therebetween. The flange portion is provided with a permanent magnet (15) apart from the center axis by a second distance greater than the first distance.

Description

technical field [0001] The present invention relates to a magnetic core for electronic equipment and a magnetic device including a magnetic core and a winding wound around the magnetic core. Background technique [0002] A typical magnetic device such as a choke coil or a transformer has a magnetic core, such as a drum-shaped core made of magnetic material, and a winding wound around the core. In order to reduce the weight and size of the magnetic device, an effective method is to reduce the volume of the magnetic core, as adopted in the prior art. However reducing the size of the core tends to saturate the magnetization. The result is an unavoidable reduction in acceptable current levels. [0003] In order to solve the above-mentioned problems, a generally used method is to form a gap in a part of the magnetic core to increase the reluctance and prevent the acceptable current level from decreasing. However, this method has a disadvantage in that the magnetic induction, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F37/00H01F17/04H01F27/25H01F29/14
CPCH01F29/146H01F27/25
Inventor 佐藤邦长
Owner TOKIN CORP