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7345388 |
Brushless motor and recording disk driving apparatus having the brushless motor
A brushless motor as an example of the invention has a stationary assembly 2 having a first housing member 10 made of a ferromagnetic material and a stator 20 held in the first housing member...
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7296409 |
Electric motor assisted turbocharger
A turbocharger comprises a turbine wheel and a compressor wheel mounted to a turbocharger shaft. An electric induction motor is provided for assisting rotation of the compressor wheel in...
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7218025 |
Rotational magnetic electrical generating device
A rotational magnetic electrical generating device produces an alternating electrical current generated by a central rotational magnetic cylinder with an inner cavity having an central fixed coil...
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7218019 |
Linear reluctance motor
A linear reluctance motor including a stator with a set of spaced blades each extending in the direction of the actuation axis, each blade including a plurality of alternating low permeability and...
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7204012 |
Method for fabricating a rotor arrangement and a rotor arrangement for an electric machine
A method for fabricating a rotor arrangement for an electric machine in which a rotor body is provided and permanent magnets made from an isotropic magnetic material are embedded in the rotor body,...
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7171718 |
Direct drive windshield wiper assembly
A windshield wiper assembly including at least one motor having an output shaft and a windshield wiper operatively connected to the output shaft. The motor includes a stator adapted to provide an...
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7165608 |
Wellbore power generating system for downhole operation
A downhole tool ( 100 ) for wellbore operations comprises a substantially tubular member ( 130 ) that is operably positionable in the wellbore and a rotation member ( 110 ) that is rotatably...
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7126309 |
Motor
The electric machine of the present invention comprises a first coil group containing a plurality of coils and a magnet group. The first coil group is classified into M phase sub coil groups, with...
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7119468 |
Electric motor
An electric motor intended for driving transport vehicles without a reduction gear is described. The electric motor can have an annular magnetic conductor of the stator with permanent magnets...
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7078838 |
Passive magnetic bearing for a motor-generator
Conductive lap windings are interleaved with conventional loops in the stator of a motor-generator. The rotor provides magnetic induction lines that, when rotated, cut across the lap windings and...
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7059556 |
Thread supplying device
A thread supplying device provided with a housing containing an electric motor wherein the stator is non-rotatingly mounted and the rotor is rotatingly mounted on a motor shaft. A thread guiding...
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7049722 |
Motor core construction
An electrical machine has a core that includes stranded magnetically permeable material. The core is elongated to thereby define a lengthwise direction and a profile that is transverse to the...
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7034423 |
Electric power steering system including a permanent magnet motor
An electric power steering system for a vehicle includes a steering wheel and a steering shaft that is connected to the steering wheel. A worm gear is connected to the steering shaft. A worm is...
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7032291 |
Method of manufacturing stator winding of rotary electric machine
A method of manufacturing a stator winding includes a twisting step of U-shaped conductor segments having a pair of straight portions by moving the straight portions in the circumferential...
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7015613 |
Linear electric motor
A linear electric motor, capable of producing reciprocation of a piston within a cylinder to compress refrigerant gas. The coil of the linear electric motor is mounted to the internal wall of a...
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7009319 |
Controlling electric motor cogging
A method of determining magnet pole geometry for controlling cogging in an electric motor includes defining the magnet pole geometry in terms of at least one design parameter, predicting cogging as...
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7002276 |
Armature with coated laminate bundle
An armature of the prior art has a lamination packet which leads to a high loss of magnetic flux in the lamination, since it completely encloses the magnets that are disposed in the lamination. An...
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6998756 |
Rotor shaft
The present invention provides a rotor shaft, comprising: a rod member ( 26 ); and a plurality of separately formed component parts (such as a compressor wheel 10 , a turbine wheel 11 and a...
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6987343 |
Motor
A motor includes a rotor including a permanent magnet type rotor unit having a plurality of permanent magnets and a reluctance type rotor unit having a plurality of salient pole portions, the rotor...
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6975055 |
Dynamo-electric machine having a rotor with first and second axially or rotationally displaceable field magnets
A dynamo-electric machine has a stator with a primary winding and a rotor with a field magnet and a shaft. the field magnet includes a first field magnet having diferent polarity magnetic poles...
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6974522 |
Method and apparatus for mounting a plurality of magnet segments on a back ring
A method and apparatus for assembling permanent magnet segments and a back ring wherein a fixture holds segments in circumaxially spaced relationship, adhesive is applied to the segments,...
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6969937 |
Multiple, permanent-magnet rotor for a rotating electrical machine, and a method for producing same
In order to allow a rotating electrical machine, which uses a permanent-magnet rotor with a flux-concentration construction for a rated power of more than 100 kW, to be assembled as easily as...
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6952068 |
Fabricated components of transverse flux electric motors
Transverse flux electric motors are made using a unique process where individual components are premade and then assembled together. A stator portion is made by nesting a coil between two stator...
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6949855 |
Transverse flux electrical machine with toothed rotor
The invention concerns a transverse flux electrical machine operating with alternating current, having a first element having an alternate arrangement of excitation cores and of flux return cores...
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6944929 |
Method of joining rubber magnet to yoke
A plurality of grooves 25 are formed in an outer peripheral surface of a cylindrical rubber magnet 17. The grooves 25 extend in a direction in which the cylindrical rubber magnet 17 is...
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6941638 |
Interconnecting method for segmented stator electric machines
A method of connecting phases of a segmented stator electric machine includes providing a stator core. An end cap assembly is attached to the stator core. Winding wire is wound around the end cap...
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6940238 |
Single coil, direct current permanent magnet brushless motor with voltage boost
A single coil, direct current permanent magnet brushless motor including a stator including six alternately-wound coils connected into a single coil having first and second ends, the...
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6940199 |
Permanent magnet rotor and brushless motor
In a rotor 20 including a plurality of permanent magnet pieces 60 fixed in a plurality of magnet insertion slots 43 provided on the outer periphery of a rotor yoke 40 , respectively, and the...
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6938323 |
Method of manufacturing stator coil of rotary electric machine
A stator coil of a rotary electric machine such as an alternator for use in an automobile is composed of a plurality of U-shaped conductor segments inserted into slots formed in a stator core. Each...
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6933818 |
Torque motors
A torque motor may include a rotor having at least two magnets disposed thereon, and a stator having a core and at least one coil. The magnets are arranged and constructed so that the outer...
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6921999 |
Electric motor
An electromagnetic rotary actuator is driven by a single-phase voltage. Permanent magnets on a rotor interact over a part-cylindrical small airgap with a soft-iron stator having pole teeth that...
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6920683 |
Process for producing a rotor assembly of a stepping motor
In a stepping motor in which a cylindrical magnet which is magnetized in an axial direction is coupled with a rotary shaft and the magnet is clamped with rotor stacks formed by laminating annular...
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6919663 |
Internal rotor motor
A low-ripple multi-phase internal rotor motor has a slotted stator ( 28 ) separated by an air gap ( 39 ) from a central rotor ( 36 ). The rotor has a plurality of permanent magnets ( 214 ),...
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6911756 |
Rotor core with magnets on the outer periphery of the core having a sine or trapezoidal wave
A rotor for a motor includes a body formed by multiple silicon steel sheets securely abutting one another. Each silicon steel sheet has a series of apertures defined in an outer periphery thereof...
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6910257 |
Production method of a sequentially joined-segment stator coil of a rotary electrical machine
A production method of a polyphase sequentially joined-segment coil of a rotary electric machine and a product produced by the same are provided. A production machine includes pairs of tines...
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6894413 |
Permanent magnet dynamo electric machine, and permanent magnet synchronous generator for wind power generation
A dynamo electric machine includes a rotor having magnetic poles with permanent magnets and a stator having armature windings concentratedly wound around teeth. When the number of pole pairs of the...
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6891297 |
Electrical-steel-sheet formed body for rotor core, rotor, rotary electric machine and related method
An electrical-steel-sheet formed body is provided with an opening portion into which a permanent magnet is inserted, and an outer-peripheral hardened portion formed on the electrical-steel-sheet...
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6891296 |
Magnetizing structure of motor
The present invention provides a structure for magnetizing a rotor magnet of a motor, which includes a rotor having a magnet cylinder with a wavy curve surface and a stator having a plurality of...
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6891293 |
Flexible disk drive with a gap between a main frame and a permanent magnet of a rotor so that the rotor does not fall although the rotor is upended to a stator
In a flexible disk drive having a main frame in which a flexible disk is inserted and a direct-drive motor having a stator disposed on a main surface of the main frame and a rotor including a...
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6891288 |
Magneto-generator, method of manufacturing the same and resin molding die assembly for manufacturing the same
A magneto-generator, a method of manufacturing the same and a resin molding die for manufacturing the same. In the magneto-generator, a guard ring is omitted with the performance of the...
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6891287 |
Alternating current axially oscillating motor
An alternating current motor may include a rotor configured to rotate about a longitudinal axis, the rotor comprising a diametrically magnetized permanent magnet. Furthermore, the alternating...
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6879075 |
Trapezoidal shaped magnet flux intensifier motor pole arrangement for improved motor torque density
A permanent magnet synchronous machine with improved torque and power characteristics. A circumferential-oriented rotor assembly is provided with alternating permanent magnets and magnetic pole...
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6876114 |
Apparatus for reducing spindle motor magnetic drag
A magnetic flux shield extending substantially the entire width of a magnetic disk drive spindle motor magnet is mounted between the magnet and the disk drive's base frame and rotates with the...
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6873235 |
Shear force levitator and levitated ring energy storage device
One or more permanent magnets, or one or more permanent magnet arrays are used to produce shear force levitation. A primary application of shear force levitators is a levitated ring energy storage...
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6873077 |
Shell-shaped magnet
Cup-shaped magnet for electric motors having two face surfaces, two lateral surface, and two top surfaces, which are curving between the face surfaces along the lateral surfaces, whereby the...
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6828702 |
Brushless DC drive
In a brushless direct-current drive with a synchronous motor ( 10 ), which has a stator ( 12 ) that supports a multi-phase stator winding ( 15 ) and a rotor ( 13 ) equipped with permanent magnet...
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6812614 |
Rotor for a synchronous motor defined by a hyperbolic function
A rotor for a synchronous motor capable of increasing output torque and reduce inductance. An outer periphery of each pole of the rotor in a cross section perpendicular to an axis of the rotor is...
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6803690 |
Electric motor excited by permanent magnets
The electric motor with permanent-magnet excitation has a stator ( 1 ), a rotor ( 7 ) supported inside the stator and adjacent permanent magnets ( 8, 9, 10, 11 ) of opposite polarity arranged next...
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6794781 |
Compact electrical machine
An electrical machine comprises a combined magnetic gearbox and electrical generator. A first set of permanent magnets ( 30 ) are arranged on a rotor ( 16 ) to produce a spatially variable first...
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6784590 |
Permanent magnet motor
A permanent magnet motor comprising a permanent magnet and an armature having a plurality of winding grooves facing the permanent magnet with an air gap therebetween. The armature has a plurality...
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