Aisin Seiki Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Takanori Hamajima

Yoshihiro Naruse

Yukio Inaguma

Nobuo Okumura

Yoshihiro Naito

A cryogenic refrigerating device comprising includes an adiabatic vacuum tank, a refrigerator having at least a low temperature generating portion of the refrigerator accommodated in the adiabatic vacuum tank, an adsorption panel attached to the low temperature generating portion of the refrigerator at a location for adsorbing molecules floating in a vacuum in the adiabatic vacuum tank, and a selective sorbing device provided in the adiabatic vacuum tank at a location for sorbing selected molecules floating in the adiabatic vacuum tank. The molecules in the adiabatic vacuum tank are adsorbed by either the panel or by the adsorbing device for keeping the vacuum pressure level in the tank constant for a long period of time.

Cryogenic refrigerating device

A linear actuator comprises a shaft made of non-magnetic material for being reciprocatingly moved in an axial direction of the shaft, a plurality of ring-shaped moving cores which are located on the shaft and arranged in the axial direction thereof, and each of which is made of magnetic material, a first spacer made of non-magnetic material and interposed between two adjacent moving cores, a plurality of ring-shaped permanent magnets each of which is disposed on one of the respective ring-shaped moving cores and each of which includes a plurality of magnets arranged in the circumferential direction in such a manner that adjacent magnets are different in polarity, and a stationary core located around each of the permanent magnets with a clearance. The stationary core is formed with an outer ring portion formed, magnetic poles which face the permanent magnets, and legs which connect the outer ring portion and the magnetic poles. Coils are wound around the legs. The moving cores and the stationary core are formed of a plurality of thin plates laminated to one another and made of magnetic material. The number of stationary cores in the axial direction of the shaft is smaller than the number of permanent magnets by one, and the polarity of the permanent magnets are formed in the radial direction of the shaft.

Linear actuator

A free piston Stirling engine includes a displacer fitted in a cylinder so as to be able to reciprocate and defining an expansion chamber and a compression chamber in the cylinder, an operational sealing area leading from the expansion chamber to the compression chamber and interposed a heater, a regenerator and a cooler in order, a free piston disposed so as to be able to reciprocate toward a direction which crosses a direction of the reciprocation of the displacer and defining an operational chamber which is communicated with the compression chamber and a buffer chamber at its both ends and a linear generator disposed around the free piston and connected with a storage battery at its output terminal via an AC/DC converter having one or more transformation ratios. According to this constitution, even though the load is larger than the output of the linear generator transitionary, it is possible to supply stable electric power by use of the storage battery. In the opposite direction, it is possible to store the surplus energy in the storage battery when the load is smaller than the output of the linear generator. Accordingly, even though the output of the free piston Stirling engine is under the unbalance condition with regard to the load quantity, especially when the load quantity is larger than the output of the free piston Stirling engine, the free piston Stirling engine can be stably operated.

Free piston Stirling engine

A linear generator according to the present invention is adapted to generate a voltage proportional to the speed of a movable member or rotor and enable the movable member to be smoothly moved. The linear generator includes a first part having permanent magnets fixed to a yoke which are magnetized to the direction perpendicular to the longitudinal direction of a shaft, and a second part having a coil wound around the bobbins and a housing enclosing the coil. A plurality of magnetic poles are provided between the magnets and coils.

Growing community of inventors

Aichi, Japan

Takanori Hamajima