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7598647 |
Inductor-type synchronous machine
An inductor-type synchronous machine includes field stators having field elements by which an N-pole and an S-pole are concentrically formed, rotors to which a rotating shaft is fixed and has...
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7595576 |
Brush-less type rotation detector shielding structure
It is possible to provide a brush-less type rotation detector shielding structure capable of reducing the interference of magnetic flux leaking from a rotation transformer to a stator iron core and...
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7270203 |
Electric machine for hybrid motor vehicle
A power system for a motor vehicle having an internal combustion engine and an electric machine is disclosed. The electric machine has a stator, a permanent magnet rotor, an uncluttered rotor...
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7134180 |
Method for providing slip energy control in permanent magnet electrical machines
An electric machine ( 40 ) has a stator ( 43 ), a permanent magnet rotor ( 38 ) with permanent magnets ( 39 ) and a magnetic coupling uncluttered rotor ( 46 ) for inducing a slip energy current in...
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7071657 |
Method and apparatus for the production of power frequency alternating current directly from the output of a single-pole type generator
A single-pole type generator with low loss magnetic core is excited by a field coil that is part of a low loss series resonant circuit tuned to a desired AC power frequency, which may be...
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6977454 |
Hybrid-secondary uncluttered permanent magnet machine and method
An electric machine ( 40 ) has a stator ( 43 ), a permanent magnet rotor ( 38 ) with permanent magnets ( 39 ) and a magnetic coupling uncluttered rotor ( 46 ) for inducing a slip energy current in...
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6903477 |
Induction machine with motor and generator operation modes
An electric machine selectively operates as a generator mode or a motor mode. The electric machine includes a stator core, a multi-phase armature winding, a field coil, a moving core having a...
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6891301 |
Simplified hybrid-secondary uncluttered machine and method
An electric machine ( 40, 40 ′) has a stator ( 43 ) and a rotor ( 46 ) and a primary air gap ( 48 ) has secondary coils ( 47 c , 47 d ) separated from the rotor ( 46 ) by a secondary air gap ( 49...
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6876120 |
Inner core structure of a rotary transformer-type resolver
An inner core 62 and a resolver rotor 63 are secured to a rotary shaft 68 so that they are coaxial. A spacer 2 , is provided between the inner core 62 and the resolver rotor 63 . The...
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6867522 |
Asynchronous machine
A synchronous machine ( 10 ), in particular, for a starter-generator of an internal combustion engine, includes a stator, a rotor ( 22 ) having a rotor shaft ( 24 ), a stack of sheets ( 28 ), and...
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6720698 |
Electrical pulse generator using pseudo-random pole distribution
A multi-pole electric pulse generator contains poles having a pseudo-random distribution. Preferably, poles are equally sized and spaced, and polarity corresponds to a pseudo-noise binary sequence,...
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6657351 |
Contactless energy transfer apparatus
A flux generator base unit electromagnetically coupled with a receiving unit to transfer energy into the receiving unit. The base unit includes one or more permanent magnets that produce a magnetic...
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6376959 |
Mangle magnetic structure
A mangle magnetic structure is composed of a plurality of transversely magnetized parallel cylindrical rods forming a cylindrical shell defining an interior cavity filled with insulated wires in...
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6359360 |
Electronically switched two phases reluctance machine
This switched reluctance machine has at least six magnet yokes ( 11 ) on the stator side. The yokes are placed circularly and they carry windings ( 112 ). These yokes ( 11 ) can be placed at the...
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6281611 |
Use of moving element to produce heat
A method and apparatus for heating substances such as beverages, soups, chemicals, etc., with heat produced by circulating electrical eddy currents. In one form of the device, a magnetic flux...
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6242834 |
Brushless polyphase machine, in particular motor vehicle alternator
A flux concerning electrical machine has a stator and a rotor, the stator including on its face a series of notches housing a series of stator coils, and further including a series of housings for...
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6144129 |
Spring mounting for an electric generator
A support system for an electric generator having a tapered spring bar connected between the stator core and stator frame, where the spring bar has a continuously tapered cross-sectional area along...
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6118201 |
Resolver with leakage flux absorber
A brushless resolver comprising a housing, a rotor rotatably mounted in the housing, a rotary transformer comprising a primary winding carried by the housing and secondary winding on the rotor and...
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6092531 |
Movable magnet transmitter for inducing electrical current in an implanted coil
An external power head is energized by a motor causing movement of an element that produces a varying magnetic field, thereby inducing power in an implanted receiver coil within a patient's body....
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6051904 |
Rotary electric machine, especially an alternator for a motor vehicle
An electrical machine includes a stator and a rotor. The stator includes on its internal face at least one induction winding housed in a pair of recesses and a series of housings for excitation...
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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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5866962 |
Rotor position detecting apparatus in switched reluctance motor
A switched reluctance motor is provided with a rotor position detecting apparatus for detecting a rotor position wherein the apparatus comprises a rotor position-sensing mechanism removably mounted...
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5841208 |
Motor capable of generating an electric signal having a particular and precise frequency and a rotary magnetic head apparatus using the same
A motor capable of generating an electric signal having a particular and precise frequency may be used in a rotary magnetic head apparatus for a video tape recorder. A wiring pattern for generating...
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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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5705872 |
Brushless resolver
A brushless resolver having a stator and a rotor, and a resolver part axially displaced to one another and a transformer part and having associated windings is provided. An additional...
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5696419 |
High-efficiency electric power generator
An electrical generator has a plurality of C-shaped stator members which are made of magnetically permeable material. Each C-shaped stator member includes a respective stator winding, and the...
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5668426 |
Rotational frequency sensing device with pulse generating wheel having two-axial position supporting sleeve
A pulse generating wheel, combined with a radial shaft sealing ring, for a machine element that can rotate about an axis. The pulse generating wheel has a cylindrical sleeve that can be slid onto...
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5625239 |
Method and apparatus for sensing relative position between two relatively rotatable members using concentric rings
An apparatus for sensing the relative rotational position between a stator (28) and a rotor (32) in a variable reluctance motor (26) includes a transmitting ring (40) mounted to the rotor (32) and...
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5361010 |
Tachogenerator for speed control of electric motors
A tachogenerator for speed control of an electric motor including a stator and a rotor. A multipole permanent magnet is connected to the rotor and has at least a pair of magnetic poles, with the...
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5177389 |
Tacho generator
A servo controlled motor has an annular coil arrangement with meander-shaped windings and an annular arrangement of magnetic pole pairs, positioned for concentric relative rotation. A first coil is...
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5070269 |
Miniature motor having a frequency generator
A miniature motor having a frequency generator comprising a miniature motor consisting of a stator equipped with a permanent magnet for forming a magnetic field, and a rotor having windings wound...
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5013946 |
Miniature motor with a frequency generator
A miniature motor with a frequency generator comprising a motor portion having a stator with a permanent magnet for forming a magnetic field and a rotor with rotor windings wound on a rotor core;...
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4980594 |
Compact servomator having an integrally wound resolver
The invention relates to an electric motor comprising a rotor (1), a stator (2) and at least two pole pairs. One particularly preferred application of the electric motor according to the invention...
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4928046 |
Multiple rotational position sensor
A multiple rotational position sensor includes a stator winding provided to a stator mounted to a casing and a rotor having a rotor winding provided to a rotor shaft mounted for rotation to the...
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4884000 |
Brushless DC motor inner tachometer
A collectorless DC motor with a horizontal air gap, particularly a low-speed motor for a direct drive of recording and/or reproducing devices has its rotor axle supported within an axial bore of...
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4864176 |
Stator support structure with stamped end plates
A spool-like stator support structure for an inductor type dynamoelectric machine incorporates stamped, annular end plates. Each end plate has a plurality of spaced-apart recessed landings along...
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4860176 |
Lighting device for vehicle
Lighting device for a vehicle moving without an engine and on wheels, such as bicycle and tricycle, comprising two lights supplied from a generator (1) comprising a stator and a rotor drivable by a...
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4853575 |
Tachometer generator
A tachometer generator of the inductive pickup variety is disclosed, particularly adapted to be mounted in close proximity with a rotating multipole permanent magnet structure. The coil produces a...
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4841187 |
Electric motor with attached tachogenerator
An electric motor with attached tachogenerator wherein the tachogenerator may be attached to electric motors of varying types without significantly changing the housing or motor shaft bearing plate...
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4818908 |
Brushless motor having phase advance
A Brushless motor with phase advance has a rotor having magnetic poll teeth, a stator having plural coils and facing the rotor across a gap, and a bearing for rotatably supporting the rotor. A...
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4791332 |
Rotor for motor tacho-generator
A rotor for a techo-generator having an integral, massive disk that is toothed at the outer circumference. The width of the grooves between the teeth is larger than the width of the teeth so that...
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4786834 |
Stator assembly for dynamoelectric machine
An adjustable speed inductor type rotating dynamoelectric machine, capable of high speed operation, employs a stator assembly incorporating a spool-like support structure. A central, generally...
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4780633 |
Alternator having a low output-voltage harmonic content
An alternator of the single-phase type in particular is composed of an armature (1) provided with at least one winding (2) and an inductor (3) comprising on the one hand a magnetic circuit (4)...
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4772815 |
Variable refluctance position transducer
A rotational position transducer comprising a rotor having annularly spaced teeth and a stator with a pole face configuration comprising annularly spaced teeth opposing the rotor teeth. One or more...
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4757225 |
Dual stack tachometer/generator
A low cost, linear, low impedance tachometer/generator includes a stator and a rotor. The rotor includes a plurality of magnetic poles which alternate between first and second polarities, and the...
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4743786 |
Rotational position detection device
This rotational position detection device comprises a stator section including primary and secondary windings and a rotor section disposed in such a manner that it is capable of performing relative...
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4733116 |
Angle sensor with reduction gear
In a flat housing (10) a stator (12) is concentrically arranged relative to an input shaft (16) supported in the housing (10). A rotor (14) is seated on the input shaft (16). A reducing gear (18)...
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4701650 |
Brushless motor with phase cancelling leads for rotational speed detector pattern
In a brushless motor, a rotor magnet is rotatably supported and comprises a main magnetizing member for rotation driving with N-poles and S-poles alternately arranged, and a subsidiary magnetizing...
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4701649 |
Brushless motor with symmetrical leads for preventing signal distortion
In a brushless motor, a magnetizing member for rotation driving with N-poles and S-poles arranged alternately is formed on a flat plane portion of a rotor magnet, and a member for detecting the...
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4678616 |
Method of producing permanent magnet
A method of producing a permanent magnet in which a material containing ferromagnetic powder is molded into a columnar or cylindrical molded body through injection molding, compression molding, or...
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