Tokyo University of Marine Science and Technology

Kawasaki Jukogyo Kabushiki Kaisha

Kitano Seiki Co., Ltd.

Tokyo University of Mercantile Marine

Nippon Steel & Sumitomo Metal Corporation

University of Fukui

National University Corporation Tokyo University of Marine Science and Technology

Nippon Steel Corporation

Mitsuru Izumi

Motohiro Miki

Kota Yamaguchi

Yohei Murase

Masahiro Kitano

Toshiyuki Yanamoto

Etsuya Yanase

Mitsuru Morita

Masato Arai

Naoki Maki

Katsuya Umemoto

Hidehiko Sugimoto

Takahiro Nakayama

Hidekazu Teshima

Keita Tsuzuki

Shinji Takei

Tetsuya Ida

Hitoshi Ohnuki

Osami Yanagisawa

Hidehiko Grad School Of Eng Univ Fukui Sugimoto

A radial flux synchronous machine includes a stator in a cylindrical shape provided with a plurality of magnetic poles, an inner rotor disposed radially inward of the stator and having an inner armature opposing the magnetic pole from radially inward, and an outer rotor disposed radially outward of the stator and having an outer armature opposing the magnetic pole (from radially outward.

Radial flux synchronous machine and electric motor-generator system

A radial-gap type superconducting synchronous machineis prepared which includes a rotorhaving, on its peripheral side, a convex magnetic polewhich includes, at its distal end part, bulk superconductors. When viewed in the direction of the rotational axis Cof the rotor, the magnetic pole center side of the bulk superconductorsis disposed nearer to a statorthan the magnetic pole end side of the bulk superconductors. A ferromagnetis disposed on the rotational axis Cside of the bulk superconductors. A magnetizing apparatusis disposed outside the bulk superconductorsin the radial direction of the rotor. Magnetization of the bulk superconductorsis performed by directing magnetic flux lines from the magnetizing apparatustoward the bulk superconductors

Radial-gap type superconducting synchronous machine, magnetizing apparatus, and magnetizing method

A radial-gap type superconducting synchronous machineis prepared which includes a rotorhaving, on its peripheral side, a convex magnetic polewhich includes, at its distal end part, bulk superconductorsWhen viewed in the direction of the rotational axis Cof the rotorthe magnetic pole center side of the bulk superconductorsis disposed nearer to a statorthan the magnetic pole end side of the bulk superconductorsA ferromagnetis disposed on the rotational axis Cside of the bulk superconductorsA magnetizing apparatusis disposed outside the bulk superconductorsin the radial direction of the rotorMagnetization of the bulk superconductorsis performed by directing magnetic flux lines from the magnetizing apparatustoward the bulk superconductors

Radial-gap type superconducting synchronous machine, magnetizing apparatus and magnetizing method

A rotary machine cools a cooling target inside a rotor rotatable around a rotational axis, includes a condenser section disposed outside the rotor and condenses a gas phase cooling medium into a liquid phase cooling medium; an evaporator section disposed inside the rotor, and evaporates the liquid phase cooling medium generated by condensation in the condenser section into the gas phase cooling medium, by heat exchange between the cooling target and the liquid phase cooling medium; and a coupling pipe flows the liquid phase cooling medium and the gas phase cooling medium between the evaporator section and the condenser section, wherein the coupling pipe has a pipe structure in which a liquid phase cooling medium passage flows the liquid phase cooling medium generated by the condensation in the condenser section and a gas phase cooling medium passage flows the gas phase cooling medium generated by evaporation in the evaporator section.

Rotary machine

Provided is a rotary machine capable of increasing cooling efficiency while preventing an increase in the weight and cost of a rotor even in a case where the diameter of the rotor is increased. A rotary machine including a rotor which is rotatable around a rotational axis, and a cooling device, wherein the rotor includes: a hollow cooling medium flow section provided in a center portion of the rotor in a radial direction and extending along the rotational axis; and a cooling target provided outward of the cooling medium flow section in the radial direction, and the rotary machine comprises a stationary section pipe which introduces a liquid phase cooling medium generated by cooling in the cooling device into the cooling medium flow section, and returns a gas phase cooling medium present in an inside of the cooling medium flow section from the cooling medium flow section toward the cooling device, the rotor including: a leading passage which leads the liquid phase cooling medium to a region which is in the vicinity of the cooling target through a first opening formed in a side surface of the cooling medium flow section, the side surface extending along the rotational axis; and a return passage which returns the gas phase cooling medium to the inside of the cooling medium flow section, the gas phase cooling medium being generated by evaporation of the liquid phase cooling medium in the region which is in the vicinity of the cooling target, by heat exchange between the liquid phase cooling medium and the cooling target.

A superconducting bulk magnet comprising a plurality of superconducting bulk materials combined, in which breakage of superconducting bulk materials is prevented and a strong magnetic field can be generated, that is, a superconducting bulk magnet comprising a plurality of superconducting bulk materials, each comprising a single-crystal formed REBaCuO(RE is one or more elements selected from Y or rare earth elements, where 6.8&#x2264;y&#x2264;7.1) in which REBaCuOis dispersed and each provided with a top surface, a bottom surface, and side surfaces, combined together, in which superconducting bulk magnet, bulk material units, each comprising a superconducting bulk material and a bulk material reinforcing member arranged so as to cover a side surface of the same, are arranged facing the same direction and contacting each other to form an assembly, a side surface of the assembly is covered by an assembly side surface reinforcing member, a top surface and bottom surface of the assembly are respectively covered by an assembly top reinforcing member and an assembly bottom reinforcing member, and the assembly side surface reinforcing member, the assembly top reinforcing member, and the assembly bottom reinforcing member are joined into an integral unit, is provided.

Oxide superconducting bulk magnet

Superconducting field poles each include a superconducting coil body formed by spirally winding a superconducting wire material, a ferromagnetic outer magnetic field-deflecting member arranged on an end face of the superconducting coil body at a radially outer side of a rotor, and a ferromagnetic inner magnetic field-deflecting member arranged on an end face of the superconducting coil body at a radially inner side of the rotor.

Superconducting field pole

A joint includes a housing and a refrigerant tube connected to a refrigerant source and communicated with a target part in a rotating machine. A rotating member is loosely fitted inside with the refrigerant tube and fixed to a rotary part of the rotating machine. A relatively rotating member has a fixed-side member and rotating-side member. The fixed-side member is connected to the refrigerant tube via a refrigerant tube extension section. The rotating-side member is connected to the rotating member via a rotating member extension section. A refrigerant zone is formed by spaces defined between the refrigerant tube and the rotating member, and between the refrigerant tube and rotating member extension sections. A sealing member is installed between the fixed-side and rotating-side members. A vacuum chamber and pressure chamber are defined within the housing.

Cryo-rotary joint

The present invention provides a superconductive rotating electric machine drive control system that has higher efficiency and is smaller size and lighter in weight than conventional systems, and also provides a superconductive rotating electric machine drive control method to be implemented in the superconductive rotating electric machine drive control system. By the superconductive rotating electric machine drive control system and the superconductive rotating electric machine drive control method in accordance with the present invention, a control operation is performed so that the field current Iapplied to the superconductive field winding of the synchronous rotating electric machine satisfies an equation for the field current Iin accordance with the variation of the electric power exchanged between the synchronous rotating electric machine and the power unit.

Superconductive rotating electric machine drive control system and superconductive rotating electric machine drive control method

A magnetizing device for superconductor and a superconducting synchronous machine are provided capable of constituting more compact and simple equipment that uses a superconductor as a magnet. The magnetizing device for superconductor includes a superconductor (); a coolant chamber () for cooling the superconductor () down to or below a critical temperature at which the transition to a superconducting state occurs; coils (') for generating a magnetic field equal to or higher than a critical magnetic field in which the intrusion of a magnetic flux into the superconductor () starts, around the superconductor () cooled down to or below the critical temperature at which the transition to the superconducting state occurs; and position modification means capable of arranging the superconductor () on a disk () and modifying the relative positional relationship with the coils (&#x2032;).

Superconductor magnetizing device and superconducting synchronization device

A detector of near-infrared light includes a light receiving device having a perovskite-type composite oxide expressed by a general formula of La Pr CrO (where 0<x<1) and magnetization measuring means for measuring an increase in magnetization in the composite oxide of the light receiving device when the light receiving device is irradiated with near-infrared light at room temperature.

Detector of near-infrared light

The inventive Langmuir-Blodgett film is made of an amphiphilic organic carboxylic acid, such as a long chain fatty acid, and a tetrathiafulvalene derivative having no long chain alkyl group. For example, the long chain fatty acid comprises behenic acid, and the tetrathiafulvalene derivative comprises 4,5-ethylenedioxy-4',5'-ethylenedithio-tetrathiafulvalene or bis-ethylenedioxy-tetrathiafulvalene. Such Langmuir-Blodgett film comprises uniform and well-ordered layered structure, may be readily produced and may exhibit a high electrical conductivity.

Growing community of inventors

Tokyo, Japan

Mitsuru Izumi