Flywheel power supply having axial magnetic bearing for frictionless rotation
First Claim
1. A power supply device for providing uninterrupted power for a period of time,the power supply device comprising a controller and a flywheel device, the flywheel device comprising a housing containing a flywheel rotor and a motor/generator comprising a motor/generator rotor, the flywheel rotor and the motor/generator rotor being mounted on a common shaft, an active axial magnetic bearing comprising a coil surrounding the shaft and being located adjacent to the motor/generator rotor for frictionless rotation, the bearing providing support for the shaft, the flywheel rotor and motor/generator rotor, the axial magnetic bearing being attached to the housing and providing, in combination with the motor/generator rotor, a flux path and magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted, wherein a single flux path extends through the motor/generator rotor and axial magnetic bearing providing the magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted.
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0 Petitions
Accused Products
Abstract
A power supply device for providing uninterrupted power for a period of time is disclosed. The power supply device has a controller and a flywheel device. The flywheel device has a housing that contains a flywheel rotor and a motor/generator rotor. The flywheel rotor and the motor/generator rotor are mounted on a common shaft. An active axial magnetic bearing is located to support the shaft for frictionless rotation. The bearing provides support for the shaft, the flywheel rotor and motor/generator rotor. The axial magnetic bearing is attached to the housing and provides, in combination with the motor/generator rotor, a flux path and magnetic field to exert a magnetic force to lift the motor/generator rotor and the shaft on which it is mounted.
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Citations
40 Claims
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1. A power supply device for providing uninterrupted power for a period of time,
the power supply device comprising a controller and a flywheel device, the flywheel device comprising a housing containing a flywheel rotor and a motor/generator comprising a motor/generator rotor, the flywheel rotor and the motor/generator rotor being mounted on a common shaft, an active axial magnetic bearing comprising a coil surrounding the shaft and being located adjacent to the motor/generator rotor for frictionless rotation, the bearing providing support for the shaft, the flywheel rotor and motor/generator rotor, the axial magnetic bearing being attached to the housing and providing, in combination with the motor/generator rotor, a flux path and magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted, wherein a single flux path extends through the motor/generator rotor and axial magnetic bearing providing the magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted.
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20. A flywheel device comprising:
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a housing containing a flywheel rotor and a motor/generator comprising a motor/generator rotor, the flywheel rotor and the motor/generator rotor being mounted on a common shaft, an active axial magnetic bearing comprising a coil surrounding the shaft and being located adjacent to the motor/generator rotor for frictionless rotation, the bearing providing support for the shaft, the flywheel rotor and motor/generator rotor, the axial magnetic bearing being connected to the housing and providing, in combination with the motor/generator rotor, a flux path and magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted, wherein a single flux path extends through the motor/generator rotor and axial magnetic bearing providing the magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A power supply device for providing uninterrupted power for a period of time, the power supply device comprising a controller and a flywheel device, the flywheel device comprising:
- a housing containing a flywheel rotor and a motor/generator comprising a motor/generator rotor, the flywheel rotor and the motor/generator rotor being mounted on a common shaft, an active axial magnetic bearing being located to support the shaft for frictionless rotation, the bearing providing support for the shaft, the flywheel rotor and motor/generator rotor, the axial magnetic bearing being attached to the housing and providing, in combination with the motor/generator rotor, a flux path and magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted, wherein a single flux path extends through the motor/generator rotor and axial magnetic bearing providing the magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted,
the flywheel device further comprising a damping device positioned at one end of the shaft, the damping device comprising a plate member having a center bore and a sleeve positioned in the center bore and fitting around the shaft, the plate member having a chamber for containing a fluid, the chamber communicating with the center bore by means of a bore hole for fluid passage therebetween, the chamber containing a spring and a plug, the plug being located between the spring and the fluid to transfer a force from the spring to the fluid or the fluid to the spring.
- a housing containing a flywheel rotor and a motor/generator comprising a motor/generator rotor, the flywheel rotor and the motor/generator rotor being mounted on a common shaft, an active axial magnetic bearing being located to support the shaft for frictionless rotation, the bearing providing support for the shaft, the flywheel rotor and motor/generator rotor, the axial magnetic bearing being attached to the housing and providing, in combination with the motor/generator rotor, a flux path and magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted, wherein a single flux path extends through the motor/generator rotor and axial magnetic bearing providing the magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted,
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40. A flywheel device comprising:
- a housing containing a flywheel rotor and a motor/generator comprising a motor/generator rotor, the flywheel rotor and the motor/generator rotor being mounted on a common shaft, an active axial magnetic bearing being located to support the shaft for frictionless rotation, the bearing providing support for the shaft, the flywheel rotor and motor/generator rotor, the axial magnetic bearing being connected to the housing and providing, in combination with the motor/generator rotor, a flux path and magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted,
wherein the motor/generator is located between the axial magnetic bearing and the flywheel rotor, wherein a single flux path extends through the motor/generator rotor and axial magnetic bearing providing the magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted, the flywheel device further comprising a damping device positioned at one end of the shaft, the damping device comprising a plate member having a center bore and a sleeve positioned in the center bore and fitting around the shaft, the plate member having a chamber for containing a fluid, the chamber communicating with the center bore by means of a bore hole for fluid passage therebetween, the chamber containing a spring and a plug, the plug being located between the spring and the fluid to transfer a force from the spring to the fluid or the fluid to the spring.
- a housing containing a flywheel rotor and a motor/generator comprising a motor/generator rotor, the flywheel rotor and the motor/generator rotor being mounted on a common shaft, an active axial magnetic bearing being located to support the shaft for frictionless rotation, the bearing providing support for the shaft, the flywheel rotor and motor/generator rotor, the axial magnetic bearing being connected to the housing and providing, in combination with the motor/generator rotor, a flux path and magnetic field tending to lift the motor/generator rotor and the shaft on which it is mounted,
Specification