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5838086 |
Synchronous motor with permanent magnets included in a rotor
A synchronous motor including permanent magnets inserted in a rotor, said permanent magnets having azimuth positions within said rotor and having radial magnetization, said rotor co-operating with...
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5831368 |
Rotor shaft retention for an electrical machine
In one embodiment of the present invention a rotor for an electrical machine comprises a shaft having a radially-reduced portion, the shaft defining an axis of rotation of the rotor. The rotor...
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5831358 |
Rotor end cap
A rotor end cap for use with a rotor of a dynamoelectric machine to induce cooling air circulation, facilitate rotor balancing and enable rotor rotational position and speed sensing. The rotor end...
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5828154 |
Reluctance motor
A magnetic rotor (5) is provided inside a stator armature (1) of a reluctance motor with an air gap between them. Two salient poles (5a, 5b), each having a width that is 2.5 times each of angular...
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5828153 |
Rotor for a reluctance machine
A rotor for a switched reluctance or synchronous reluctance machine includes a central member from each end of which extends a rotor pole. The rotor is made up of continuous laminations which each...
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5828152 |
Rotor with permanent magnet of generator and method of manufacturing the same
A rotor with permanent magnet capable of fixing permanent magnets on the rotor iron core by a simple method. This rotor with permanent magnet comprises; a rotor iron core in which rotor iron plates...
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5821647 |
Spindle motor
A spindle motor comprises a rotational member supported by bearings for rotation about a rotational axis, a rotational body and a motor rotor mounted on the rotational member for rotation...
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5818138 |
Permanent magnet electric machine with hard-magnetic and soft-magnetic segments
In known permanent magnet electric machines with a radial air gap, intersecting phase conductors are deflected only into the space arranged axially in front of the slotted soft magnetic body. By...
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5818139 |
Brushless DC motor
Permanent magnet housing spaces 3b and spaces 3c for flux barrier are formed within a rotor 3. A minimum value of a distance from a portion on a boundary face of the permanent magnet housing space...
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5818140 |
Synchronous reluctance electrical motor having a low torque-ripple design
A synchronous reluctance electrical motor, including a stator having an even number of slots per pair of poles equal to n s , a rotor of the transverse lamination type having an even number n r of...
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5811908 |
Magneto electric generator rotor and an implement for removing this rotor
By inserting a male screw for fixing a ratchet claw into a nut placed on an insert core and the like to prevent rotation, it is possible to eliminate additional screw processing on the insert core,...
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5811907 |
Small generator
A small generator comprising a stator having slots on the inner circumferential surface thereof and generating windings wound on the slots, and a salient-pole type rotor freely rotating inside the...
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5808392 |
Permanent magnet type rotating machine
A permanent magnet type rotating machine includes a stator core provided on an inner periphery thereof with armature windings, a rotor core, a plurality of permanent magnets arranged on an outer...
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5804905 |
Electric disk armature machine
An electric disk armature machine is disclosed which comprises a drive shaft for the transmission of power from and to the rotor of an electric disk armature machine and which has at least one...
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5804904 |
Brushless DC motor and a method of generation power therewith
An improved 10-pole 9-slot brushless DC motor used as a spindle motor used in devices, such as a computer hard disk driver or a laser scanner, is provided which reduces cogging torque and improves...
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5801470 |
Rotors with retaining cylinders and reduced harmonic field effect losses
A rotor includes a shaft; a permanent magnet layer; and a retainer comprising a conductive, low magnetic permeability material bound to the rotor shaft. The permanent magnet layer is...
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5798596 |
Permanent magnet motor with enhanced inductance
A permanent magnet motor with enhanced inductance which comprises a motor frame having annular inner walls defining a void therein and a stator mounted on and extending around the periphery of the...
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5798590 |
Multi-degree-freedom electric motor
The present invention provides a multi-degree-of-freedom electric motor having a spherical rotor which is able to obtain a uniform torque and which achieves a fine and smooth rotational control. A...
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5796195 |
Electric motor
An electric motor comprises a rotor rotational position indicator formed internally with a pole field portion of a rotor thereof, and a notch disposed between the pole field portion and the rotor...
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5793145 |
End cap to rotor attachment
An induction motor includes a stator defining stator inner and outer diameters extending about a longitudinal axis, the stator includes a plurality of windings extending longitudinally and...
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5789839 |
Aerostatic and aerodynamic bearing for a motor
The invention relates to a high precision axial and radial aerostatic and aerodynamic bearing for a motor. The bearing surfaces of the stator and the rotor are of a toroidal shape.
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5786652 |
Magnetoelectric rotor with claws and non-magnetic spacers interposed therebetween
The invention relates to a 2N pole claw rotor comprising a first magnetic material part, comprising an axial hub having a free end, and an end provided with N axially-extending claws that are...
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5783894 |
Method and apparatus for generating electrical energy
An apparatus for generating electrical energy includes at least one fixedly mounted stator having a generally cylindrical cross-section and further including an inner periphery and an outer...
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5783882 |
Conductive contact for an air bearing spindle
A spindle motor assembly which utilizes a reservoir of electrically conductive fluid to provide a conductive path through the assembly. The spindle motor assembly includes a spindle shaft that is...
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5783888 |
Rotary electric machine
A cylindrical bearing box 2 is integrally provided at the axial center of an annular disk 1 on which a flange 1a is formed. A shaft 3 is attached to a pair of bearings 2a, 2b engaged with the...
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5783890 |
Imprinted geometric magnetic anticog permanent magnet motor
A brushless, direct current, permanent magnet motor is disclosed, which comprises a stator and a rotor mounted for rotation about an axis in the stator. The stator has a plurality of stator teeth...
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5777420 |
Superconducting synchronous motor construction
A rotor assembly for use within a superconducting electric motor includes a superconducting winding formed of high temperature superconductor and during operation, generates a flux path within the...
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5773909 |
X-ray tube target drive rotor
An induction motor rotor particularly for x-ray tube applications comprises a series of hollow cylinders fitting concentrically on each other and on a motor shaft. The first cylinder is a highly...
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5774032 |
Cooling arrangement for a superconducting coil
A superconducting device, such as a superconducting rotor for a generator or motor. A vacuum enclosure has an interior wall surrounding a cavity containing a vacuum. A superconductive coil is...
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5770904 |
Electric motor
An electric motor with an internal rotor (10), which comprises a free intal chamber (12), and a stator (14) disposed at a radial spacing from the rotor (10) has a more compact construction and can...
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5770908 |
Motor having variable air gap
An air gap varying motor includes a base, a rotation body, a motor rotor, a motor stator which is fixed in the base, and has an inner surface for contacting and supporting the motor rotor to enable...
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5767598 |
Motor and electronic parts-mounting apparatus incorporating the motor
There is provided a motor and an electronic parts-mounting apparatus incorporating the motor. The motor includes a rotor and a stator. The stator is comprised of a stator core formed of laminate of...
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5760520 |
Motor
A motor has a stator and a rotor that is formed of two rotor parts fitted on a rotor shaft in a fashion preventing the rotor from rotating relative to the rotor shaft. The rotor parts carry...
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5757101 |
Laminated back iron structrue for increased motor efficiency
A rigid disk drive spindle motor includes a bobbin carried by the motor hub which has a permanent magnet attached to the inner cylindrical surface and a laminated back iron mounted at the outer...
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5753990 |
Means for producing rotary motion
A device for converting magnetic force to mechanical force including a member having an axis about which it is rotatable, the member having a peripheral edge portion formed of a material that is...
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5753991 |
Multiphase brushless AC electric machine
The multiphase brushless AC electric machine comprises a stator frame having a surface provided with parallel slots and projections disposed alternately, each of the openings being substantially as...
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5747913 |
Rotor for hybrid generator having improved magnet retention
A hybrid alternator has a rotor with a plurality of permanent magnets disposed between opposing claw-pole segment pole fingers. The magnets are radially retained by the pole fingers during...
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5744894 |
Brushless motor having a field magnet, a portion of which is used for detecting the rotor's position
A brushless motor is provided. The brushless motor of the present invention includes a shaft, a rotor, having a plurality of field magnets attached thereto, fixed to the shaft, a stator for forming...
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5736800 |
Light weight, high performance radial actuator for magnetic bearing systems
A magnetic bearing and positioning system provides a radial actuator for positioning a shaft without mechanical contact between the actuator and the shaft. As disclosed, the actuators use a...
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5736803 |
Synchronous machine rotor
A synchronous machine rotor has a progressive magnetic airgap and a constant aerodynamic airgap.
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5731648 |
Laminated rotor core for mounting permanent ring magnets
One aspect of the invention is a rotor core for use with a permanent ring magnet in an electric motor which serves to minimize and evenly distribute thermal stresses in the rotor without...
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5731645 |
Integrated motor/generator/flywheel utilizing a solid steel rotor
A flywheel energy conversion device provides highly efficient conversion between kinetic and electrical energy. The flywheel produces increased output by providing armature coils in an air gap...
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5731647 |
Hybrid-energized synchronous electric machine
A hybrid-energized synchronous machine includes a laminated stator core that is arranged in a magnetic yoke and is divided axially into at least two core halves between which there is a field coil,...
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5731651 |
Rotor for an electromotive tool motor
A motor rotor for use in a grinder or other electromotive tool in which a motor winding is prevented from being damaged by collisions with particles. The motor rotor is composed of a core having...
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5729065 |
Magnetic bearing cell with rotor and stator
The invention relates to a rotationally symmetrical 1 magnetic bearing cell (1) with a rotor (2) arranged to rotate about the central axis (10) of the cell (1) and having a shaft (4) and at least...
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5726516 |
Rotor for high speed switched reluctance machine
A rotor assembly for a reluctance machine is disclosed in which the rotor assembly comprises a stack of rotor laminations having a plurality of rotor poles defining interpole regions. The rotor...
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5726517 |
Magnetoelectric claw rotor, and a method of manufacturing such a rotor
The invention relates to a magnetoelectric claw rotor of the type comprising parts made of magnetic material forming the poles of the rotor, and parts made of non-magnetic material for separating...
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5723928 |
Induction motor and method of adjusting power factor of the same
An induction motor capable of producing an increased torque has a stator for generating a rotating magnetic field, a stator fixed to a shaft, a cylindrical member disposed within an inner space...
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5721459 |
Output voltage regulation using rotor growth
The present invention is an energy storage apparatus. The energy storage apparatus includes a stator that is stationary. The stator includes a winding encircling the stator for generating an output...
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5719456 |
Variable reluctance electric motor
A variable reluctance electric motor includes a stator having a plurality of radially inwardly extending poles which are divided into a plurality of longitudinal sections. The cross sectional...
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