Class 322/51 - Rotor element

Subclass of Class 322 - Electricity: single generator systems
Definition: Subject matter wherein the generator magnetic structure
No. of patents: 24
Last issue date: 12/25/2007

Number	Title	Issue Date
7312550	Architecture for electric machine In one aspect, an alternator is described which includes a current control apparatus including a stator winding and a control winding, wherein current control in the control winding regulates the stator winding. In another aspect, a gas turbine engine includes a mul...	12/25/2007
7288923	Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another...	10/30/2007
7230363	Low profile generator configuration One embodiment of the invention relates to a low profile electric generator having a short axial length. A cylindrical rotor body defines an interior cavity and is coupled to a driveshaft along the axis of the cylindrical body. A first rotor assembly is coupled to t...	06/12/2007
7227338	Fixed frequency electrical generation system with induction coupler and use thereof in an aircraft A fixed frequency electrical generation system includes an induction coupler. The system includes an electricity generator with no rings or brushes, and an induction speed regulator, mechanically coupled, so as to transform mechanical energy input from a shaft rotat...	06/05/2007
7141901	Downhole torque-generating and generator combination apparatus A combination of a torque-generating apparatus with an alternator/generator. The torque-generating apparatus comprises a first assembly (10, 25) including a generally cylindrical member of magnetically soft material and having a longitudinal axis, and a secon...	11/28/2006
7133325	Apparatus and method for generating electrical power in a borehole An apparatus and related method generate electrical power in a tubular housing, such as a drill collar, disposed in a borehole when drilling fluid flows through the tubular housing. The apparatus includes a stator adapted for being secured within the tubular housing...	11/07/2006
7126313	Architecture for electric machine The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be us...	10/24/2006
7119461	Enhanced thermal conductivity ferrite stator A permanent magnet electric machine (i.e.: motor/generator) having a magnetic flux circuit including a stator and a permanent magnet rotor mounted for rotation about an axis relative to the stator. The stator has an electric circuit with windings electro-magneticall...	10/10/2006
6998757	Multi-rotor synchronous machine permitting relative movement between rotors A compact and reliable structure of a multi-rotor synchronous machine which may be employed as a generator/motor for automotive vehicles is provided. The machine includes an outer rotor having permanent magnets, an inner rotor having permanent magnets disposed to be...	02/14/2006
6965183	Architecture for electric machine The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be us...	11/15/2005
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 core portions. The stator core portions are made from laminations or si...	10/04/2005
6906479	Gas turbine engine starter generator with multiple windings on each exciter stator pole A rotating electrical machine, such as an aircraft starter-generator, includes an exciter that has its stator windings divided into a number of sections. A plurality of switches are electrically coupled to the exciter stator winding sections and are configured and c...	06/14/2005
6788031	Induction generator system and method An induction generator having one or more energy windings and one or more auxiliary windings where the auxiliary windings have fixed and switched capacitors which are used to control the induction generator output under variable load conditions. The auxiliary windin...	09/07/2004
6383407	Bonded magnet, magnet roll, a ferrite powder used therefor and method for producing same A ferrite powder for bonded magnets having a substantially magnetoplumbite-type crystal structure and an average diameter of 0.9-2 μm, the ferrite powder having a basic composition represented by the following general formula: (A1-x Rx	05/07/2002
6236123	Generator providing alternating current which has a selected frequency An electrical generator has at least one rotating ring of field magnets which produce a circular array of magnetic fields, and a ring of generator output coils which are in the magnetic fields. The field magnets are permanent magnets or electromagnets. Th...	05/22/2001
6191561	Variable output rotary power generator The present invention is directed to a downhole apparatus for quickly generating and regulating variable output electric power by varying the alignment of a pair of axially adjacent permanent magnets rotating within an armature having electrically conduct...	02/20/2001
5874797	Permanent magnet generator providing alternating current which has a selected frequency An electrical generator has at least one rotating ring of field magnets which produce a circular array of magnetic fields, and a ring of generator output coils which are in the magnetic fields. The field magnets are permanent magnets. The generator output...	02/23/1999
5260642	Torque driven dual PMG actuator A permanent magnet generator having a plurality of permanent magnet generator units which produce a controlled output potential for driving variable electrical load (20) by vectorially adding an output potential of the permanent magnet generator units to ...	11/09/1993
4885493	Output voltage control apparatus of a permanent magnet alternator A permanent magnet alternator including a flux diversion member resiliently and magnetically coupled to the permanent magnet rotor for rotation therewith, an auxiliary (control) permanent magnet rotor rigidly coupled to the flux diversion member for rotat...	12/05/1989
4766362	Regulatable permanent magnet alternator The present invention provides an improved alternator system in which the magnetic flux modulating sleeve is carried by the rotor and rotates with the rotor. The position of the sleeve on the rotor is adapted to be adjusted during operation of the alterna...	08/23/1988
4654577	Permanent magnet rotary electrical machines A permanent magnet rotary electric machine has two permanent magnet rotors rotatable within respective stator windings, and drivingly connected to an input shaft. The driving connection to one of the rotors is provided by an epicyclic gear train to which ...	03/31/1987
4305031	Rotary electrical machine A rotary, permanent magnet, electrical generator has a stator in which a voltage is induced by a rotor having permanent magnet pole pieces arranged in two rows. An actuator can cause relative rotation of the rows of pole pieces to maintain a substantially...	12/08/1981
4099076	Damped rotor for a multi-channel generating system An improved rotor assembly for a generator used in a multi-channel parallel electrical generating system. A plurality of laminated sections, each having N outwardly extending poles, are stacked to form a rotor. Field windings are wound around the N poles ...	07/04/1978
4093906	Permanent magnet pulse generator and method of forming and assembly A two-cycle engine in such as an outboard motor includes an engine shaft and a flywheel mounted on the shaft and having an inner cylindrical hub portion. A rubber-like magnet strip is adhesively attached about the hub portion with an outer protective shie...	06/06/1978

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Class 322/51 - Rotor element