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Common mode noise filter

A common mode noise and filter technology, applied in the direction of inductors, fixed inductors, transformer/inductor components, etc., can solve the problems of common mode noise attenuation, etc., to improve attenuation characteristics, increase attenuation characteristics, increase Effects of Parasitic Capacitance

Pending Publication Date: 2020-11-03
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the metal layer 5 is connected to the ground, and the high-frequency common mode noise is bypassed to the ground by the parasitic capacitance generated between the first coil 2, the second coil 3, and the metal layer 5, so that the high-frequency Common Mode Noise Attenuation in the Frequency Region

Method used

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  • Common mode noise filter
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Embodiment Construction

[0020] A common mode noise filter in one embodiment of the present disclosure will be described below with reference to the drawings.

[0021] figure 1 is a cross-sectional view of a common mode noise filter in one embodiment of the present disclosure, figure 2 is a perspective view of the common mode noise filter, image 3 is an exploded perspective view of the common mode noise filter. in addition, figure 1 Yes figure 2 I-I line sectional view.

[0022] The common mode noise filter in one embodiment of the present disclosure is in Figure 1 ~ Figure 3 Shows. This common mode noise filter includes: a first magnetic body part 11 including a magnetic body; a second magnetic body part 12 including a magnetic body; The non-magnetic body portion 13 of the magnetic body. Furthermore, it is equipped with: a first coil 14 and a second coil 15 which are built into the non-magnetic body part 13 and face each other; ) connected metal layer 16. Hereinafter, when viewed from...

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Abstract

Provided is a common mode noise filter with which it is possible to improve an attenuation characteristic with respect to common mode noise in a wide frequency region. The common mode noise filter ofthe present disclosure is provided with: a magnetic material portion (11) and a magnetic material portion (12) which are configured from a magnetic material; and a non-magnetic material portion (13) which is sandwiched between the magnetic material portion (11) and the magnetic material portion (12) in a stacking direction and is configured from a non-magnetic material. The common mode noise filter is further provided with: a coil (14) and a coil (15) which are disposed in the non-magnetic material portion (13) and are opposed to each other; and a metal layer (16) which is formed in at least one of the magnetic material portion (11) and the magnetic material portion (12), and is connected to ground. The metal layer (16) is positioned closer to a lower surface rather than an upper surface of the magnetic material portion (11), and closer to an upper surface rather than a lower surface of the magnetic material portion (12).

Description

technical field [0001] The present disclosure relates to common mode noise filters used in various electronic devices such as digital equipment, AV equipment, and information communication terminals. Background technique [0002] Existing such common mode noise filters such as Figure 5 As shown, it includes: a non-magnetic body part 1; a helical first coil 2 and a second coil 3 provided inside the non-magnetic body part 1; a magnetic body part 4 formed by sandwiching an insulating part; Metallic layer 5 of body 4 . [0003] Furthermore, the metal layer 5 is made to face the first coil 2 and the second coil 3 . Furthermore, the metal layer 5 is connected to the ground, and the high-frequency common mode noise is bypassed to the ground by the parasitic capacitance generated between the first coil 2, the second coil 3, and the metal layer 5, so that the high-frequency common-mode noise attenuation in the frequency region. [0004] In addition, Patent Document 1 is known, fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H7/09H01F17/00H01F27/00
CPCH01F17/0013H01F2017/0093H01F17/045H01F2017/0066H01F27/292H03H7/427H03H2001/0092H03H2001/0085H03H2001/0057H01F2017/0073H03H1/0007H03H2001/0035
Inventor 川岛讬司石田成白田中秀树
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD