Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Hiroshi Tomita

Tatsuya Mori

Toshinori Oda

Hirotaka Ishikawa

Toshiyuki Asahi

Nobuya Matsutani

Hidenori Uematsu

Junichi Kotani

Shunya Inoue

Hisayo Miyoshi

A reactor includes a coil body, an exterior case, and a filler. The coil body includes a core and a coil wound around the core. The exterior case includes a metal structure and a resin frame. The metal structure has a bottom surface and a side wall provided to stand upright from the bottom surface. The bottom surface and the side wall of the metal structure are unitarily formed with each other. The frame is disposed at an opposite side to the bottom surface of the metal structure. The exterior case houses the core and the coil. The filler is filled between the exterior case and the coil body.

Reactor

The present invention is intended to provide a line filter having an outstanding attenuation characteristic over a wide frequency band from low frequency band to high frequency band, with an improved elimination characteristic for common mode noises. To achieve this object, the invention incorporates a structure wherein a first coil unit ( ) for second band and a second coil unit ( ) for second band are disposed vertically to a closed-loop magnetic core ( ).

Dual band common-mode noise line filter

A line filter capable of eliminating the common mode noise and the normal mode noise altogether. It comprises both the common mode noise elimination means and the normal mode noise elimination means. A central magnetic core 32 is provided in the middle flange 34 of bobbin 23. A through-window 36 is provided at a place facing the counterpart feet 27 of closed magnetic circuit core 28 so as a part of the central magnetic core 32 is exposed, but the central magnetic core 32 and the closed magnetic circuit core 28 are not making contact with each other.

Line filter

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Hyogo, Japan

Hiroshi Tomita