Class 323/348 - Including rotary motion

Subclass of Class 323 - Electricity: power supply or regulation systems
Definition: Subject matter wherein the structure or winding is movable
No. of patents: 20
Last issue date: 12/04/2007

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Number	Title	Issue Date
7304446	Sensorless and brushless DC motor A sensorless and brushless motor is disclosed including a stator, a rotor, a control circuit and an induction coil (50). The stator includes a stator core (30) and a stator coil (34) wound around the stator core. The rotor includes a rotor magne...	12/04/2007
7190143	Pulse width modulation (PWM) rectifier with variable switching frequency A method for controlling a device including a plurality of switching devices operated in accordance with a pulse width modulation technique includes receiving a reference voltage signal associated with a first pair of the switching devices. A switching signal is gen...	03/13/2007
7148599	Iron core winding, method of winding an iron core, and variable reluctance angle detector An iron core winding is such that a winding of a given polarity is coiled in series so that the beginning of each coiling and the ending of each coiling cross on a magnetic pole that is positioned in the direction of a circumference of the iron core. When the windin...	12/12/2006
7119536	Two-resolver deviation angle detector having serially connected output windings A deviation angle detector enlarges the application range by enlarging the detectable deviation angle range. The deviation angle detector has two resolvers, which have rotors, stators, and single excitation windings and multiple output windings that are coiled aroun...	10/10/2006
7088025	Variable-reluctance resolver and rotational angle sensor using same A variable-reluctance resolver includes a rotor and a stator. The rotor includes axially connected first and second rotor portions. The first rotor portion has n salient poles provided about a center axis at uniform angular intervals, where n is an arbitrary integer...	08/08/2006
7071658	Protection of a generator without measuring temperature A method and an apparatus for providing protection to a generator are disclosed. A reference is determined out of rated capability of the generator. Based on the reference, and field current and output conditions of the generator, there is determined a drop in gener...	07/04/2006
7009385	Flux compensated rotational position detector and operating methods therefor A flux compensated rotational position detector includes a rotating element having a plurality of magnetic poles extending over its entire periphery, and a fixed element having a plurality of protruding fixed-element magnetic poles with fixed-element magnetic pole t...	03/07/2006
7005771	Variable reluctance resolver A variable reluctance resolver is provided with an output winding having a reduced effect from externally introduced leakage magnetic flux. A variable reluctance resolver is provided with a resolver excitation winding and a resolver output winding wrapped around mul...	02/28/2006
6934672	Control loop status maintainer for temporarily opened control loops A system provides primary and alternate control circuits to a controlled system through an output port. A monitoring circuit that monitors a parameter of the controlled system selects the control methodology. The primary control circuit, consisting of a primary acti...	08/23/2005
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 spacer 2 and the inner core 62	04/05/2005
6741485	Interconnection system for transmitting power between electrical systems An electrical interconnection system (100) comprises a variable frequency rotary transformer (102) and a control system (104). The control system (104) adjusts an angular position of the rotary transformer (102) so that measured po...	05/25/2004
6608473	Electrical machine, especially a three-phase generator The electrical machine, especially a three-phase generator, has a stationary stator (21); a rotatable rotor having an excitation coil (28), a rotary transformer (29) having a primary winding (30) and a secondary winding (31) on respective soft ferrite cor...	08/19/2003
6356472	Interconnection system for transmitting power between electrical systems An electrical interconnection system (100) comprises a variable frequency rotary transformer (201) and a control system (104). The control system (104) adjusts an angular position of the rotary transformer (102) so that measured power (P1) tran...	03/12/2002
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 operatively associated with the primary winding, a resolve...	09/12/2000
4517471	Rotary converter machine for direct transfer of electric energy by flux linkage between windings on a stator pack A rotary converter machine which includes a stator with three-phase primary, and secondary windings, and a rotor mounted within the stator which includes a damping winding. The primary and secondary stator windings are arranged on a common stator pack and...	05/14/1985
4499392	Homopolar alternator electromechanical power conversion machine An electromechanical conversion machine includes a 1-turn transformer primary winding comprising a rotating conductive member electrically connected to a stator conducting member. The rotating member moves within an alternating magnetic field. A nonrotati...	02/12/1985
4465966	Controlled ferroresonant voltage regulator providing immunity from sustained oscillations The invention is a controlled ferroresonant power supply with an improved feedback circuit resulting in improved output stability. The feedback circuit is responsive to the low voltage secondary output of the power supply to provide a variable output sign...	08/14/1984
4445103	Rotary differential transformer with constant amplitude and variable phase output A rotary differential transformer is provided which has a constant amplitude output the phase angle of which varies with the angular displacement of a rotor. The rotor contains a pair of core segments of magnetic material which serve to couple portions of...	04/24/1984
4255682	Multipolar resolver A multipolar resolver is so constructed that the need of the conventionally indispensable coil on the resolver rotor is eliminated by providing a center coil on a stator, and 5n or 3n rotor poles and 4n stator poles are provided where n is a positive inte...	03/10/1981
4227144	Error compensation of synchro control transmitters In order to correct errors in a synchro control transmitter, the error in the transmitter is measured at equal angular increments, the magnitude and phase of the maximum error of the second harmonic determined and resistors placed across two pairs of the ...	10/07/1980

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Class 323/348 - Including rotary motion