Koyo Giken Inc.

Kazuki Houzan

Akira Nagai

Kazuhiro Suzuki

Kouji Kai

Koji Kai

Mitoshi Kai

Tuyosi Shinozaki

A flat, electrically and thermally conductive flat surface group is formed in the common connection regionof the secondary coil. The flat conductive surface group is directly and mechanically joined to the connecting surfaces of the first conductor plate, the second conductor plate, and the third conductor plate, respectively. The first conductor plate, the second conductor plate, and the third conductor platecover the entire common connection region. The annular first conductor plateoccupies the maximum area. The refrigerant can be circulated in the annular cavity provided inside the first conductor plateto efficiently cool the whole.

Welding transformer

It is possible to control a welding in a high speed and a high precision large electric current, and consumption electric power is also reduced. In the welding transformer, a loop magnetic core, a wound primary coil, plural positive side coilsand plural negative side coilsthat are alternately sandwiched between respective gapsof the primary coil, are comprised. A coil is fixed on the other surface of a contact base member. On the other surface of the contact base member, a first connection polar boardis electrically connected to a positive side electric conductorthrough the first connection polar board. A negative side coilis electrically connected to a negative side electric conductor. The connecting part of the positive side coiland the negative side coilis electrically connected to the third connection polar board. By sandwiching a thin insulation layer, a positive side electric conductor, a rectifying deviceand a first polar boardare arranged on one side; A negative side electric conductor, a rectifying deviceand a second polar boardare arranged on the other side; and the first polar boardand the second polar boardare electrically connected to a third polar board. It is possible to use by combining plural units and by connecting an output side in parallel in a small size and a large capacity.

Welding transformer and welding transformer assembly and welding apparatus

Growing community of inventors

Sagamihara, Japan

Kazuki Houzan