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7615905 |
Hybrid electric reluctance motor
Hybrid electric reluctance motor, characterized by the fact of its having an arrangement with coils ( 8 ) in opposition and permanent magnets ( 9 ) in opposition and in parallel with the coils ( 8...
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7573164 |
Driving apparatus
A driving apparatus includes a first magnet, second magnet, stator, first coil, second coil, first bearing, second bearing and rotor. The first and second magnets respectively have a magnetized...
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7538524 |
Generators and transformers with toroidally wound stator winding
Electrical generators are provided with toroidally wound stator windings electrically connected in series; a high permeability stator core, preferably an amorphous magnetic alloy material, glassy...
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7479715 |
Omnidirectional electrical generators
Electrical generators are provided by causing permanent magnets to travel through hollow passageways having electrical conductors flanking or surrounding the space within the passageways. The...
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7476998 |
Magnetic drive device
A magnetic drive apparatus including a rotor with a rotor magnetic flux generator, a stator with a stator magnetic flux generator and stator magnetic paths, and a magnetic flux controller provided...
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7453341 |
System and method for utilizing magnetic energy
The present invention is a system and method for utilizing magnetic energy. The basic principles of the present invention may be implemented in a variety of systems and methods. A magnet may be...
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7443069 |
Stator structures
Stator structures are provided. A stator structure includes at least a magnetic conductive layer and at least a first auxiliary magnetic polar layer. The magnetic conductive layer comprises a...
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7443058 |
Actuator capable of reciprocal linear driving and rolling driving and power toothbrush using the same
A reciprocal linear driving unit and a rolling driving unit are adjacently provided on a common single shaft in axial direction thereof, so that the reciprocal linear driving in the axial direction...
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7414343 |
Hybrid-excited rotating machine, and vehicle with the hybrid-excited rotating machine
A hybrid-excited rotating machine comprising: a stator winding of a multi-phase Y-connection; a plurality of rotor magnetic poles fixed on a rotor shaft 3 at a predetermined spacing in the...
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7385321 |
Motor having shifted teeth of pressed powder construction
A multi-polar rotary machine comprises a cylindrical outer rotor arranged concentrically with the stator and with an air gap therebetween. The stator has two spaced stator elements and a ring...
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7378749 |
Electrical generator system
An electrical generator system includes a source for producing heated gases, a conduit connected to the source for receiving a flow of the heated gases, and a generator assembly positioned in close...
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7323844 |
Circuit and method for control of a stepper motor
A circuit for the control of a stepper motor having a rotor configured as a permanent magnet and a stator configured of at least first and second energized excitation coils enclosing the rotor....
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7317273 |
Electromagnetic actuator and portable device having the same
An electromagnetic actuator includes a cylindrical stator made of a permanent magnet and having annular end faces magnetized to plural magnetic poles, a coil securely disposed in a hollow portion...
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7265471 |
Apparatus and process for generating energy
Energy is generated by an apparatus and process which utilize magnetic forces to move a rotor in a circular direction to turn a rotor shaft. This apparatus and process convert magnetic energy into...
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7224091 |
Motor
A stepping motor includes a hollow cylindrical fixed yoke; a magnet disposed coaxially with the fixed yoke and divided into sections in the circumferential direction, the sections being alternately...
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7129611 |
Method and radial gap machine for high strength undiffused brushless operation
A radial gap brushless electric machine ( 30 ) having a stator ( 31 ) and a rotor ( 32 ) and a main air gap ( 34 ) also has at least one stationary excitation coil ( 35 a, 36 a ) separated from...
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7112907 |
Flux modifier for a permanent magnet brush-type motor using wound field coils combined with permanent magnets
A stator and armature assembly 12 is provided for a permanent magnet DC motor. The assembly includes an armature 13 having a lamination core 14 and windings 15 , and a stator structure 16 ...
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7075200 |
Direct-driven magnetic rotating apparatus
Rotating-force transmission means is omitted by mounting permanent magnet plates directly to a rotational body which is rotated by magnetic repulsive force, thereby achieving a high-efficiency...
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7023122 |
Tumbling magnet electricity generating system
The first magnet ( 9 ) is set free to tumble within a tumbling chamber ( 10 ). A coil ( 11 ) wound around the out surface of the tumbling chamber ( 10 ). The two ends of the coil ( 11 ) are...
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6989619 |
Rotor apparatus for high strength undiffused brushless electric machine
A radial gap brushless electric machine ( 30 ) having a stator ( 31 ) and a rotor ( 32 ) and a main air gap ( 34 ) also has at least one stationary excitation coil ( 35 a, 36 a ) separated from...
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6975050 |
Brushless DC motor
A system and method for reducing the cost of producing a brushless DC motor is presented. The brushless DC motor provides higher power density and efficiency with an increased tool run time. The...
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6972504 |
Permanent magnet machine and method with reluctance poles for high strength undiffused brushless operation
A method and apparatus in which a rotor ( 11 ) and a stator ( 17 ) define a radial air gap ( 20 ) for receiving AC flux and at least one, and preferably two, DC excitation assemblies ( 23, 24 ) are...
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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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6906490 |
Starting of switched reluctance generators
A switched reluctance drive is operated as a generator on a high voltage supply which has no long-term energy storage capability. A low voltage supply is used to start the generator through the use...
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6885121 |
Controlled radial magnetic bearing
The flux densities formed by plural electromagnet poles M 1 to M 12 which are arranged at a predetermined interval in a circumferential direction of a rotary body 1 at the same position in an...
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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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6864608 |
Brushless generator with permanent magnets
Disclosed is a brushless generator with permanent magnets, which provides high-speed operation, simple maintenance, lightweight, and stable power. The brushless generator with permanent magnets...
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6844656 |
Electric multipole motor/generator with axial magnetic flux
This invention relates to an electric multiple motor/generator with axial magnetic flux. Thus a generator/motor or electrical machine in which a magnetic flux path through one or more pole legs or...
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6806610 |
Magnetic motor with movable rotor and drive magnets
The invention provides a magnetic motor wherein a plurality of rotor magnets are positioned along a rotor which is mounted to a shaft. A plurality of drive magnets are movably positioned generally...
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6806609 |
Single phase induction motor and hermetic reciprocal compressor having a single phase induction motor
A single phase induction motor and a compressor utilizing the single phase induction motor wherein the motor has a stator having a plurality of slots; a rotor being rotated by a magnetic field...
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6806599 |
Rotary actuating drive and rotary switch
To simplify the design of a rotary actuator, in particular for an “R”-type waveguide switch, having a permanently magnetized rotor and a plurality of stator windings surrounding the rotor in a...
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6792335 |
Robotic apparatuses, systems and methods
A mobile device for traversing a ferromagnetic surface. The device includes a frame and at least one surface contacting device attached to the frame. The device also includes a Halbach magnet array...
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6791225 |
Flywheel magneto generator
The invention relates to a flywheel magneto generator having a rotor assembly and a stator assembly. The rotor assembly includes a non-ferromagnetic flywheel and a plurality of magnetic poles that...
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6787958 |
Electrical machines
An electrical motor or generator comprises a rotor 79 without windings, a stator 78 having armature windings comprising at least two coils A 1 , A 2 having active portions positioned within...
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6784586 |
Hybrid alternator with an axial end retainer for permanent magnets
The invention relates to a rotating electric machine, especially an alternator or alternator/starter for motor vehicles, including a stator surrounding a rotor ( 10 ) equipped with a pack of metal...
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6784585 |
Hybrid salient pole machines
A hybrid synchronous machine includes a cylindrical element having slots; excitation windings situated in at least some of the slots; and permanent magnets situated in at least some of the slots....
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6777842 |
Doubly salient machine with permanent magnets in stator teeth
Permanent magnet machines including doubly salient machines having one or more permanent magnets located at least partly and preferably entirely within the stator teeth, thereby avoiding weakening...
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6777838 |
Methods and apparatus for increasing power of permanent magnet motors
A method of increasing the power output of existing permanent magnet motors along with apparatus is disclosed. Increased power output is achieved by more completely utilizing the magnetic field of...
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6756870 |
Composite magnet of electromagnet and permanent magnet, and eddy current retarder
A composite magnet has an iron core, a coil around the iron core, and a permanent magnet in the iron core. A first eddy current retarder includes a brake drum with a rotatable shaft, and a...
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6750629 |
Inverter control apparatus and motor driving system
A motor driving system for driving an induction motor with a rotation frequency detector. The induction motor drives a load, and the rotation frequency detector detects a rotation frequency of the...
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6727632 |
Flat rotary electric machine
A flat rotary electric machine to be mounted in a vehicle engine includes an annular stator core with a plurality of teeth and an armature winding and a field unit including a gutter-like field...
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6707226 |
Rotor of revolving field type AC generator
A rotor of an AC generator includes a field coil, a pole core having a plurality of claw poles disposed in the circumferential direction to enclose the field coil to provide a plurality of magnetic...
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6707213 |
Hybrid magnet type DC motor
A DC motor has a stator that is constituted as a hybrid magnet. The stator has a plurality of electromagnets and permanent magnets that are alternately arranged in the circumferential direction of...
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6707212 |
Electrical machine
The present invention relates to an electrical machine which has one or several stators ( 2 ) edified by one or several statorpackages ( 21 ) that consists of one or several statorsections ( 22 )....
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6703746 |
Interior permanent magnet rotor
An electric traction motor for a vehicle including a housing, a wound stator field located in the housing, a rotor magnetically interacting with the wound stator field, high energy magnets...
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6703735 |
Active magnetic thrust bearing
An active magnetic thrust bearing, acting on only a single axial side of a rotor, while also having an efficient permanent magnet bias for linearized and highly amplified control, uses two...
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6700297 |
Superconducting PM undiffused machines with stationary superconducting coils
A superconducting PM machine has a stator, a rotor and a stationary excitation source without the need of a ferromagnetic frame which is cryogenically cooled for operation in the superconducting...
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6700272 |
Reluctance motor with gearless step-down without electronic control of rotating field
A reluctance motor with a stator ( 1 ) which has a three-phase current stator winding for generating a rotary magnetic field and a rotor ( 3 ) which is located on the shaft ( 2 ) and which is made...
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6674205 |
Auxiliary magnetizing winding for interior permanent magnet rotor magnetization
A method and apparatus for fabricating a rotor for an electric traction motor including forming cavities in the rotor, injecting magnetic material in a portion of the cavities, configuring an...
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6573634 |
Method and machine for high strength undiffused brushless operation
A brushless electric machine ( 30 ) having a stator ( 31 ) and a rotor ( 32 ) and a main air gap ( 34 ), the rotor ( 32 ) having pairs of rotor pole portions ( 22 b, 22 c, 32 f, 32 l ) disposed...
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