A flywheel energy storage system having magnetic bearings that are preferably homopolar, that is, the magnetic fields do not alternate polarity around a given circumferential location. This significantly increases efficiency, reduces heating in the evacuated flywheel environment and reduces power re
A flywheel energy storage system having magnetic bearings that are preferably homopolar, that is, the magnetic fields do not alternate polarity around a given circumferential location. This significantly increases efficiency, reduces heating in the evacuated flywheel environment and reduces power requirements of the electronics. The magnetic bearings are also preferably permanent magnet biased. Permanent magnets provide bias flux in the magnetic bearings which produces several benefits. The bias flux linearizes and amplifies the response of the magnetic bearings for much easier and simpler control. Compared with designs using electromagnetic bias, permanent magnet bias results in lower power consumption and increased linearity in force to displacement response due to the large reluctance offered by the permanent magnets. Permanent magnet bias also allows use of only one amplifier per axes instead of two. This greatly reduces the costs and increases reliability.
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A flywheel energy storage system having magnetic bearings that are preferably homopolar, that is, the magnetic fields do not alternate polarity around a given circumferential location. This significantly increases efficiency, reduces heating in the evacuated flywheel environment and reduces power re
A flywheel energy storage system having magnetic bearings that are preferably homopolar, that is, the magnetic fields do not alternate polarity around a given circumferential location. This significantly increases efficiency, reduces heating in the evacuated flywheel environment and reduces power requirements of the electronics. The magnetic bearings are also preferably permanent magnet biased. Permanent magnets provide bias flux in the magnetic bearings which produces several benefits. The bias flux linearizes and amplifies the response of the magnetic bearings for much easier and simpler control. Compared with designs using electromagnetic bias, permanent magnet bias results in lower power consumption and increased linearity in force to displacement response due to the large reluctance offered by the permanent magnets. Permanent magnet bias also allows use of only one amplifier per axes instead of two. This greatly reduces the costs and increases reliability. re retaining portion and a tip-side motor-side connecting portion; a motor wire insertion hole, into which the motor-side coil wire is inserted and crimped, is formed in said coil wire retaining portion, directed in the axial direction; a connection screw hole in which is screwed the connection bolt of said motor-side connecting portion is formed, directed in the axial direction; and, a whirl-stop portion, embedded in molding, is formed in said motor-side connecting portion. 5. The wiring connection device according to claim 4, wherein a plating liquid hole is formed in one side in the radial direction of the coil wire retaining portion of said motor-side connection terminal, enabling the inflow of plating liquid into the coil wire insertion hole; and, after plating, the motor-side coil wire is inserted into the coil wire insertion hole, said coil wire retaining portion is crimped from the side in the radial direction opposing the plating liquid hole, so that the motor-side coil wire is attached in the coil wire retaining portion while being pressed against thereto. 6. The wiring connection device according to claim 1, wherein said cable-side connection terminal is constituted by a base-side cable retaining portion and tip-side cable-side connecting portion; a motor wire insertion hole, in which the core of a power supply cable is inserted and crimped, is formed in said cable retaining portion, directed in the axial direction; and, a connection through hole, through which is passed said connection bolt, is formed in said cable-side connecting portion, directed in a direction intersecting the axis. 7. A wiring connection device, wherein a substantially cylindrical-shape motor case is mounted on a cylinder block of an engine; a motor stator of an electric motor having an electricity generation function is mounted in the motor case; on the crankshaft of the engine is mounted a rotor mounting member; the motor rotor of the electric motor is mounted on the rotor mounting member; a terminal box, having vertical walls standing integrally and extending outwardly from an outer periphery of said motor case, the vertical walls having an aperture portion directed in an outward radial direction defined by the vertical walls; a motor-side through hole, directed in the outward radial direction and which communicates inside and outside of said motor case is formed in a case periphery wall of said motor case and is enclosed by said vertical walls; a plurality of motor-side connection terminals mounted on respective ones of a plurality of motor-side coil wires drawn out from said motor stator, the motor-side connection terminals being embedded and retained within said motor-side through hole and directed in the outward radial direction and arrayed in the circumferential direction by molding, the molding sealing said motor-side through hole; respective cable-side connection terminals attached to a plurality of power supply cables, and respective connectors attached for fastening to said terminal box; a plurality of connector mating holes, and a plurality of connector fastening screw holes paired with the plurality of connector mating holes, are formed in a vertical wall of said terminal box parallel to the arrayed direction of said motor-side connection terminals, directed in directions substantially perpendicular to the axial directions of said respective motor-side connection terminals, and arrayed in the circumferential direction; and, said plurality of connector mating holes and connector fastening screw holes are arranged such that angles made by planes containing each of the axes of the connector fastening screw holes and paired connector mating holes formed in said vertical wall, with each of motor-side connection surfaces formed at tips of motor-side connecting portions of said motor-side connection terminals respectively connected to said plurality of cable-side connection terminals, are each different. 8. A wiring connection device, wh
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이 특허에 인용된 특허 (9)
Habermann Helmut (Vernon FRX), Axial electromagnetic bearing for smooth shafts of large diameter.
Meeks Crawford R. (Woodland Hills CA) McMullen Patrick T. (Los Angeles CA), Electromagnetic thrust bearing using passive and active magnets, for coupling a rotatable member to a stationary member.
Benedetti Alain (Meulan FRX) Laury Luc (Orsay FRX) Legrand Francis (Rocquencourt FRX) Poubeau Pierre (Le Pecq FRX) Weisser Bernard (Verneuil-sur-Seine FRX), Equipment for storage of energy under kinetic form and recovery thereof in electric form and method of using such equipm.
Rosen Harold A. ; Khalizadeh Claude ; Pano Scott B. ; Kubicky Joseph J. ; Rubin Seymour N., Magnetic bearing system including a control system for a flywheel and method for operating same.
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