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7582998 |
Brushless DC electrical generator
The present invention is a direct current generating machine that eliminates the need for brushes or other mechanical commutators. A pair of opposed, spaced apart rotatable rotors, each carrying a...
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7466044 |
Electro-magnetic circular engine
An electro-magnetic circular engine in which the motive force is electro-magnetism. The electro-magnetic circular engine comprises a hub assembly, first and second electro-magnetic wheels,...
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7411328 |
Dynamo electric machines
A dynamo electric machine for an aircraft gas turbine engine includes a housing supporting a stator of the dynamo electric machine, a rotor assembly rotatably mounted in the housing and including...
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7285889 |
Pulsed-inertial electric motor
The invention relates to electric motors, particularly to low-voltage gearless commutator motors, and can be used as motor-wheels in transportation vehicles and in other technologies. The aim of...
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6975054 |
Electric motor
An electric motor includes a stator which carries permanent magnets, and a rotor which carries electromagnets. A particular arrangement of connecting up the windings of the electromagnets to the...
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6888280 |
High performance brushless motor and drive for an electrical vehicle motorization
The system includes a permanent magnet three-phase motor and an electronic current controlled inverter by pulse width modulation. The motor has twenty-two poles and twenty-four slots, three phases...
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6876122 |
Circular rail linear induction motor
The present invention is directed to an electric motor for rotating an object around a central axis. The electric motor includes a motor casing. A circular segmented rail element is disposed within...
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6703745 |
Rotor structure for a motor having built-in type permanent magnet
A rotor structure for a motor having built-in type permanent magnets includes a multiplicity of axial slots for containing the permanent magnet, and a shaft hole for installing a shaft. The...
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6665102 |
Galvanometer-type scanner
A DC motor of a galvanometer-type scanner has four poles, and compared to a conventional DC motor with a bipolar construction, the armature inductance L can be reduced to half or less for a case...
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6630764 |
High performance brushless motor and drive for an electrical vehicle motorization
The system includes a permanent magnet three-phase motor and an electronic current controlled inverter by pulse width modulation. The motor has twenty-two poles and twenty-four slots, three phases...
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6013961 |
Electric motor having rotation detection sensor
In an electric motor having a rotation detection sensor, a pair of engagement recesses are provided on an axial end surface of a resin cylindrical body of a commutator. A permanent magnet is held...
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5909076 |
Magnetic commutation alternator, method of manufacture thereof and wireless infrastructure employing the same
Alternators employing magnetic commutation, methods of manufacturing the alternators and wireless communications infrastructures employing the alternators. In one embodiment, an alternator...
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5659210 |
Easily constructible instructional electric motor
A simple motor device for use as a learning tool includes a battery, a permanent magnet, an electrically conductive wire coil, a housing having an open bottom and parallel sidewalls to accommodate...
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5617241 |
Optical beam scanner
A rotating polygon mirror for optical beam scanning. The polygon mirror is fixed to a rotating shaft and is rotated at a high speed by a drive force of a rotating drive with brushes. Additionally,...
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5545936 |
C-stator type segmented zoned field dc-motor
An electrical machine of the reluctance or permanent magnet type includes one or more pawns of high permeance material which are relatively moveable along a plurality of C-shaped stators which are...
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5519276 |
DC compound motor having an auxiliary generator which supplies power for shunt field winding excitation
A DC compound motor of the type having a series winding and a shunt field winding includes an auxiliary generator driven by the motor for supplying power to the shunt field winding. The generator...
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5256924 |
Superconducting commutator for DC machines
A commutator employs superconducting switches to commutate currents in the field stator of a dc machine. The switches couple the machine's stator windings to a DC link. The switches are exposed to...
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5220227 |
Rotor magnet of motor and having improved magnetizing pattern and method of magnetizing the same
A rotor magnet of the type including a plurality of circumferentially arranged magnets of alternately opposite polarities, wherein each of the magnets has a magnetizing pattern such that the...
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5184038 |
Method of coupling magnetic position detecting device with brushless dc motor and the coupling structure thereof
A magnetic pole position detecting device is coupled with a brushless dc motor by determining the angular positional relationship between an input shaft of a rotor, a detecting device body, and a...
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5041749 |
High speed, high power, single phase brushless DC motor
A DC brushless motor comprising a rotor shaft, and rotor assembly mounted on the rotor shaft. The rotor assembly includes a permanent magnet rotor and a plurality of sequentially stacked rotor...
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5006745 |
Polyphase direct current motor
A three-phase direct-current motor has a field magnet having P field poles positioned as a circular array at angularly equally spaced intervals, and an armature having cores providing N slots with...
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4947071 |
High speed DC motor
The stator electromagnets (80', 82', 84', 86', 88', 90') face inward about the rotor cavity (12) of the motor. Spaced horseshoe magnets (70) with spaced apart, opposite poles face outward about the...
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4873463 |
D.C. electric motor
In a d.c. motor, the stator may form the armature and has its windings inserted in slots in its cylindrical surface and the rotor may comprise a permanent magnet or be provided with d.c. windings....
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4774426 |
Commutator machine having a permanent magnet stator
A commutator machine, in particular a small direct-current motor, has at least one pair of permanent magnets (11) retained on a magnetic short-circuit element (10), the permanent magnets being of a...
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4733118 |
Low damping torque brushless D.C. motor
A brushless D.C. motor, suitable for use as a hand-held surgical tool, includes a field of self-supporting coils arranged between a pair of impregnated fiberglass epoxy sheets situated in an air...
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4719382 |
Direct-current motor
The invention generally concerns a DC motor with an armature, several poles and with field coils surrounding said poles. According to the instant invention, each pole includes two pole halves which...
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4698538 |
dc brushless electromagnetic rotary machine
A dc brushless electromagnetic rotary machine, such as a dc electric motor or a dc electrical generator, includes a rotor having a permanent magnet which has the entirety of its cylindrical outer...
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4665331 |
Brushless DC micromotor
A brushless DC micromotor made up of a stator coil and a rotor housed inside thereof with magnet poles formed therein, which micromotor is characterized in that the stator coil is formed by...
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4565939 |
Everted knitted tube insulation for windings of dynamoelectric machines
A knitted glass fiber tube is everted, or turned inside out to convert the usual outward flare which develops at the cut end thereof into a purse mouth which tends to urge the cut end inward...
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4508988 |
Permanent magnet motor stator for d.c. motors
In a permanent magnet commutator type D.C. servomotor having a wound iron core armature and a permanent magnet stator, the stator includes a uniquely formed annular yoke. The unique yoke includes a...
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4503349 |
Self-excited high current DC electrical pulse generator
Homopolar generators are provided with a helical field coil disposed around a rotor, wound coaxially with the rotor, and connected in series with sliding electrical contacts on the rotor. The coil...
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4465949 |
Electromechanical frequency generator-modulator kinetic storage device
An electromechanical device comprised of a battery energized motor having widely separated poles and requiring momentum for operation applied by inertia from a lost motion fly-weight accelerated by...
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4355249 |
Direct current motor having outer rotor and inner stator
The stator of the motor comprises a series of stator rings arranged in cylindrical fashion. Each stator ring is made up of a circular row of electromagnetic components, each component comprising a...
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4307310 |
Segmented magnet dynamoelectric machine with series connected rotor conductors
A dynamoelectric machine, of the direct current type, with a circumferentially segmented stationary magnetic field structure providing magnetic poles including diametrically opposed pairs of north...
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4060746 |
Electric direct current rotating machine
The rotor of an electric direct current rotating machine has at least one winding which cooperates with a stationary magnetic circuit. The winding is formed of several sections connected in series....
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3663851 |
D.C. MOTOR
A d.c. motor having large, semicylindrical, chamfered pole pieces of soft magnetic material for focusing the magnetic flux of two permanent magnets onto the armature of the motor to provide an...
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3624441 |
FIELD FRAME ASSEMBLY FOR DIRECT CURRENT DYNAMOELECTRIC MACHINES
A field frame assembly for a DC motor which includes two end frames joined with a field member. The field member cross section has a serpentine configuration providing integral salient poles and an...
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3604961 |
DIRECT CURRENT MOTOR HAVING POLES ARRANGED TO MINIMIZE COGGING TORQUE
A direct current motor has a rotatable axially slotted cylindrical armature and an even number of permanent magnet poles. The poles are spaced apart 360°/N where N is the number of poles. The...
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3555328 |
DC MOTOR WITH ROTATING BRUSH HOLDER
A DC motor having a ring stator slotted on the inside and outside surfaces to receive insulated square iron wire windings to form a stationary armature, the windings being connected at a plurality...
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3553509 |
DIRECT-CURRENT MOTOR ENERGIZED BY PERMANENT MAGNETS
DC motor including a tubular stator housing having a pair of curved permanent magnets mounted on the inner surface thereof. A pair of magnetic pole pieces each comprising a segment of a cylinder...
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3535573 |
DIRECT CURRENT HETEROPOLAR ELECTRICAL MACHINES
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3480811 |
MAGNETIC ACCELERATOR
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3471730 |
D.C. SERIES MOTOR WITH LAMINATED FIELD STRUCTURE OF DIVERSE MATERIALS
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3471728 |
DYNAMOELECTRIC APPARATUS
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3466482 |
REVERSIBLE DIRECT CURRENT MOTOR
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3427483 |
DIRECT CURRENT MOTOR WITH HOLLOW,LOW INERTIA ARMATURE AND SPRING-BIASED BEARINGS
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3419740 |
Self-commutated direct current motor with permanent magnet rotor
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3335305 |
Dc dynamoelectric machine with resistive means in series with each brush
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3259768 |
Dynamoelectric machine and method of making armature
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3225286 |
Voltage and frequency regulator for a motor-generator inverter
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