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RE41035 |
Magnetic bearing device with vibration restraining function, magnetic bearing device with vibration estimating function, and pump device with the magnetic bearing devices mounted thereto
Disclosed are a magnetic bearing device with a vibration restraining function, a magnetic bearing device with a vibration estimating function, and a pump device with the magnetic bearing devices...
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7633202 |
Damping in high-temperature superconducting levitation systems
Methods and apparatuses for improved damping in high-temperature superconducting levitation systems are disclosed. A superconducting element (e.g., a stator) generating a magnetic field and a...
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7633201 |
Magnetic bearing device and vacuum pump
A magnetic bearing device ( 1 ) for rotatably supporting a shaft ( 20 ) for rotation about a rotation axis ( 101 ) is disclosed. The device ( 1 ) comprises a first active radial bearing ( 5 ), one...
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7633203 |
Damping and support in high-temperature superconducting levitation systems
Methods and apparatuses to provide improved auxiliary damping for superconducting bearings in superconducting levitation systems are disclosed. In a superconducting bearing, a cryostat housing the...
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7608951 |
Fully redundant spacecraft power and attitude control system
An energy storage flywheel system for a spacecraft is implemented with a fully redundant rotating group and gimbal actuator. In particular, the gimbal actuator, motor/generator, primary bearings,...
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7605509 |
Rotor shaft of a spinning rotor
A rotor shaft of a spinning rotor has an annular magnet bearing component which is secured from the centrifugal force effective during the spinning process by means of a ring liner, for radially...
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7602091 |
Positioning apparatus and exposure apparatus
A positioning apparatus includes a beam which is driven in a first direction that is perpendicular to the longitudinal direction of the beam, a movable member which surrounds at least a part of the...
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7598644 |
Buffer structure for heat dissipating fan
A heat dissipating fan includes a housing ( 201 ), a stator ( 21 ), a rotor ( 27 ) and a buffer structure. The housing defines an accommodating space ( 202 ) and includes a hollow tube ( 201 b )....
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7598643 |
Motor with electrodynamically and hydrodynamically supported rotor
An apparatus includes a rotor, a stator, and a plurality of magnets forming bearing poles coupled to a selected one of the stator or the rotor. The apparatus further includes a plurality of shorted...
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7576463 |
Magnetic bearing device and magnetic bearing spindle device
A control device includes a differential amplifying circuit for obtaining a difference between values of exciting currents (exciting voltage values) supplied to a pair of axial electromagnets and a...
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7568409 |
Hybrid orbiting spindle for shaping non-circular holes
A machine tool assembly includes a high speed rotating spindle for forming extremely precise surface contours on a work piece. The spindle is supported on a spherical air bearing about its center...
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7557480 |
Communicating magnetic flux across a gap with a rotating body
An electromagnetic actuator includes a body having a rotational axis, a first pole adjacent an end facing surface of the body, and a second pole adjacent a lateral facing surface of the body. The...
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7548004 |
Passive levitation in alternating magnetic fields
Stable levitation of an object in an alternating magnetic field can be achieved by eliminating coupling between the rotational and translational forces acting on the object. Stable levitation can...
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7547998 |
Aligning apparatus including an attraction preventing plate provided between permanent magnet and magnetic member
An aligning apparatus includes a moving member, a magnetic member arranged vertically above the moving member, a stator unit which is arranged vertically below the moving member and has a plurality...
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7545065 |
Spin-stabilized magnetic levitation without vertical axis of rotation
The symmetry properties of a magnetic levitation arrangement are exploited to produce spin-stabilized magnetic levitation without aligning the rotational axis of the rotor with the direction of the...
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7545066 |
Jacketed active magnetic bearing
The jacketed active magnetic bearing is applied to a rotary machine having a rotor in contact with a process gas and placed in a leaktight enclosure. The magnetic stator is protected by a first...
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7531929 |
Magnetic floating paper towel holder
A magnetic floating paper towel holder consists of a magnetic stand that has magnetic blocks installed at four corners and four sides and a magnetic paper towel holder which has two magnetic wheels...
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7525227 |
Spindle motor and disk drive unit
A simple configuration allows a rotor of a spindle motor to be eccentric in the pickup moving direction, and improves axial run-out caused by clearance between a rotating shaft and bearing. An arc...
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7501782 |
Method and apparatus for controlling a magnetic bearing device
A method and a controller for controlling a magnetic bearing device, in which a rotor is suspended for rotation around a shaft, are disclosed. Sensor signals are transformed to yield tilt...
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7498704 |
Motor
A motor includes a rotor and a stator. A shaft of the rotor is received in a sleeve. A face of the sleeve and a face of the shaft, that are opposed to each other, form a bearing supporting the...
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7485994 |
Magnetic bearings
A magnetic bearing has two bearing members each of which carries a set of bearing elements. The bearing elements carried by one member are interleaved with the bearing elements carried by the other...
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7474026 |
Electromagnetic drive device
A moving core includes a magnetic body having a rough face-shaped wall portion at a side facing a stationary core, a plated layer portion provided on the magnetic body and including a micro concave...
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7471022 |
Magnetic bearing
Certain exemplary embodiments comprise a system, which can comprise a radial magnetic bearing static portion. The radial magnetic bearing static portion can comprise a plurality of electromagnets....
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7466051 |
Superconducting magnetic bearing
A superconductive magnetic bearing 22 comprises a stationary bearing portion 23 having an annular superconductor unit 26 provided on a fixed portion 20 , and a rotatable bearing portion 24 ...
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7466052 |
Bearing assembly having a mechanical component and using attractive magnetic forces
A magnetic bearing assembly, either radial or linear, utilizes attractive magnetic forces between inner and outer components of the assembly. The assembly includes a mechanical device for...
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7459416 |
Fluid bearing unit and spindle motor using the same
The present invention provides a fluid bearing unit capable of achieving lower torque and lower current consumption in comparison with a conventional bearing unit, and a spindle motor using the...
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7456537 |
Control system for bearingless motor-generator
A control system for an electromagnetic rotary drive for bearingless motor-generators comprises a winding configuration comprising a plurality of individual pole pairs through which phase current...
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7453342 |
Method of controlling and stabilizing laser output
This invention describes a means by which lasers and laser beam controllers mounted on moving vehicles or other unstable platforms can be isolated from vibrations. By magnetically levitating the...
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7448327 |
Suspending, guiding and propelling vehicles using magnetic forces
Magnetic levitation methods and apparatus use arrays of vehicle magnets to provide three forces: suspension, guidance and propulsion. The magnets, which can be permanent magnets or superconducting...
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7436093 |
Turbomolecular vacuum pump
The turbomolecular vacuum pump with active magnetic bearings comprises an enclosure ( 110 ) defining a primary vacuum chamber ( 116 ), a rotor ( 120 ), an electric motor ( 107 ), an axial magnetic...
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7429811 |
Fault tolerant homopolar magnetic bearings
A magnetic bearing for supporting a spinning shaft in the radial direction and/or the axial direction includes a rotor formed on the shaft and a stator positioned around the rotor. Poles in the...
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7428087 |
Mirror structure for laser printer
The present invention relates to a weight-balancing structure for rotary polygon mirror of color laser printer, 1 which includes a stator set, a rotor set having a loading disc fixed on a spindle,...
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7420304 |
Bearing unit and electric motor furnished therewith
Bearing unit furnished with a bearing retaining part, the bearing retaining part formed from a single, seamless component and furnished with a cylindrical section disposed on the outer periphery of...
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7417345 |
Fan assembly with magnetic thrust bearings
A motor. The motor includes a stator, a rotor, a top magnetic structure, and a bottom magnetic structure. The stator is disposed in a frame. The rotor is also disposed in the frame, corresponding...
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7391140 |
Magnetically coupled heat dissipating fan
A heat-dissipating fan includes a casing, a stator, and an impeller. The casing includes a base supported by a plurality of ribs. The base includes an axial tube for receiving a bearing through...
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7391128 |
Wind generator system using attractive magnetic forces to reduce the load on the bearings
A wind generator system includes a stationary frame, a shaft, mechanical bearings and a stator and a rotor, along with magnetic components configured to reduce or substantially eliminate various...
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7383929 |
Anti-vibration technique
An anti-vibration apparatus includes a first magnet unit arranged on a support target and including a first permanent magnet, and a second magnet unit including a pair of second permanent magnets....
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7356922 |
Method of fabricating a rate gyroscope and accelerometer multisensor
Three magnetic substrates are provided, the first substrate forms the rotor and the other two form the outer stator. A series of spaced concentric grooves and spaced spiral grooves are formed in...
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7352553 |
Magnetic bearing control device
A magnetic bearing control device includes a rotation speed sensor for detecting a rotational speed of a rotating member supported on an axial magnetic bearing and a radial magnetic bearing without...
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7315101 |
Magnetic bearing apparatus
In order to obtain a magnetic bearing apparatus in which a large cooling effect is exerted by a simple configuration, fins 15 which form an air flow in a rearward direction are disposed in a rear...
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7315100 |
Motor and magnetic bearing assembly thereof
A motor comprising a stator, a rotor, and a plurality of blades. The stator comprises a stator base with an opening, a first magnetic structure disposed at a bottom of the opening, a magnetic pole...
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7307365 |
Magnetic guiding device
The invention concerns a magnetic guiding device ( 1 ) having at least one element ( 2 ) to be guided magnetically in the axial direction, e.g. a shaft or an actuation member that is movable in the...
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7292425 |
Magnetic bearing device and turbo molecular pump with the magnetic bearing device mounted thereto
To provide a magnetic bearing device capable of reducing vibration by preventing a deterioration in the control of a rotor shaft due to a variation in the axial position of the rotor shaft, while...
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7285887 |
Axial magnetic bearing apparatus
Axial magnetic bearing apparatus in which a rotary disc made of a magnetic material is fixedly attached to a rotating shaft, while a pair of electromagnetic stators in each of which a ring-like...
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7276828 |
Magnetic bearing system
A magnetic bearing system for a rotating machine is disclosed. The magnetic bearing system provides a non-contacting radial rigid support for the rotating machine by employing two magnetic...
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7276826 |
Spindle motor and disk drive device
A simple construction causes a spindle motor rotor to be eccentric in a pickup moving direction and improves axial run-out caused by clearance between a rotating shaft and a bearing. A magnetic cap...
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7271370 |
Yarn guiding godet with magnetic bearings
A godet for guiding at least one advancing yarn in a yarn processing operation. The godet comprises a tubular casing which is mounted for free rotation on a support by means of a plurality of...
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7264430 |
Magnetically levitated high-speed spindle for shaping irregular surfaces
A magnetically levitated high-speed spindle assembly ( 20 ) is provided for forming non-circular holes ( 22 ) in workpieces ( 24 ) or non-circular surfaces on pins. The non-circular holes ( 22 )...
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7262531 |
Magnetic suspension bearing
The present invention relates to a magnetic suspension bearing supported by magnetic force, which comprises one or more magnets fixed on a shaft directly or indirectly which can rotate with said...
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7262524 |
Bearing assembly, stage device using same, and exposure apparatus using same
A stage apparatus includes a guide provided with a surface including a magnetic body, a moving body movable along the surface, a gas bearing for supporting the moving body with respect to the...
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