Tokyo Shibaura Denki Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Susumu Mine

Takao Ishizaka

Hiroshi Hatano

Takayuki Kobayashi

Hiroki Sekiya

Akio Tanaka

Hisayasu Mitsui

Tamiko Hirumachi

Hideshige Moriyama

Sei Murai

Takahiro Tsuchihashi

A superconducting coil bas a winding wire portion which is formed by winding a superconducting wire covered with an insulating material around a winding frame composed of such a material that its modulus of longitudinal elasticity is 50 (GPa) or greater, and its thermal contraction rate between a room temperature and a temperature of 77 (K) is 0.35% or above while applying a tensile force thereto, and a bonding material impregnated between the superconducting wires and is then solidified by a heat treatment to reduce a contact surface pressure between the winding wire portion and the winding frame, preventing transition to a normal conductive state. A method for manufacturing superconducting coil having a step of forming a winding wire portion by winding a winding frame with insulation superconducting wires in a plurality of lines and in a plurality of layers while applying a tensile force thereto, the method includes a step of setting a winding tensile force of the insulation superconducting wires larger in intermediate through external layers apart from the winding frame than in an internal layer close to the winding frame or a step of forming a non-acute angled cavity between the curved surfaces to restrain the occurrences of a crack and the exfoliation of the winding wire portion and generation of quench due to the electromagnetic force when exciting the coil.

Superconducting coil and manufacturing method thereof

A superconducting magnet, applied for a train side permanent magnet for a magnetically levitated train as one embodiment of the invention, comprises a coil structure including a superconducting wire wound into a form of a race track and impregnated with epoxy resin, an annular vessel member accommodating the coil structure, and a spacing member rigidly mounted in the vessel member so as to divide the interior thereof into first and second spaces. The coil structure is securely sealed in the first space, and the second space constitutes a liquid helium path.

Superconducting magnet and method of manufacture thereof

Superconducting magnet

Disclosed is a superconductive electromagnet apparatus having a coil with a coiled conductor with a channel between adjacently disposed the paths of the coil conductor of which width is selected in accordance with amounts of heat produced at the corresponding portions of the coil section as viewed in cross section.

Superconductive electromagnet apparatus

Growing community of inventors

Zushi, Japan

Susumu Mine