Tdk Corporation

Hideaki Harata

Masatoshi Yasuda

Katsuhiro Ishigaki

Shoichi Tani

Toshio Tomonari

Koki Sato

Katsumi Kobayashi

Nobuo Takagi

Setu Tsuchida

Keisuke Kawahara

Coil component

A coil device includes a coil portion and a bobbin. The coil portion includes wires connectable to terminals. The bobbin includes a first terminal block and a second terminal block formed on both sides in a winding axis direction of a cylindrical portion for forming the coil portion around the cylindrical portion. A length of the first terminal block in a width direction perpendicular to the winding axis direction is larger than that of the second terminal block in the width direction.

Coil device

A coil device includes a bobbin, a core body, a wire, and a plurality of terminals. The bobbin includes a pair of connection side portions and a pair of terminal tables. The pair of connection side portions is arranged near both sides of a winding core of the core body and wound by the wire along with the winding core. The pair of terminal tables is arranged on both ends of the connection side portions and respectively includes the terminal protruding outward in a winding axis of the winding core. The core body includes a pair of flanges arranged on both ends of the core body in the winding axis. Each of the terminal tables includes a flange storage recess configured to contain the flange.

A transformer that improves the DC superposition characteristic without incurring eddy-current losses. In the transformer, a part of a plate-like core opposing a top face of a flange of a drum core is formed with a first opposing portion opposing none of input and output terminals and a second opposing portion opposing the input and output terminals. A first gap is formed between the top face and the first opposing portion by a spacer. A second gap greater than the first gap is formed by a recess of the plate-like core provided so as to correspond to the second opposing portion. This allows magnetic fluxes to pass between the top face and the first opposing portion where the gap is formed and inhibits them from passing between the plate-like core and the input and output terminals where the second gap greater than the first gap is formed.

Transformer

Noise filter case

Growing community of inventors

Tokyo, Japan

Hideaki Harata