Plural Armatures In Common Field Patents (Class 310/126)
  • Patent number: 9917489
    Abstract: An axial air-gap motor stator and a fan thereof includes a motor stator. The motor stator includes multiple metal substrates stacked together. Each metal substrate has a port and multiple pole teeth disposed around the port. The two adjacent pole teeth on each metal substrate are disposed with a magnetic pole and the number of the pole teeth of each metal substrate is a natural number twice the number of the magnetic poles of each metal substrate. The magnetic poles of the metal substrates are arranged in a staggered manner. This avoids the problems of interference of magnetic poles and prevents the magnetic field from being affected.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: March 13, 2018
    Assignee: COOLER MASTER CO., LTD.
    Inventors: Fu-Lung Lin, Shih-Wei Huang, Chu-Yi Kuo
  • Publication number: 20150061649
    Abstract: A moving magnetic field generating apparatus includes a magnet array including magnets disposed at a first pitch such that N and S poles of adjacent magnets in the magnet array are alternated, and first and second magnetic pole piece arrays extending along the magnet array to interpose the magnet array therebetween with a gap from the magnet array. The first and second magnetic pole piece arrays are disposed with a predetermined phase difference therebetween. The first magnetic pole piece array includes first magnetic pole pieces disposed at a second pitch in an array and each having a length enough to face at least two adjacent magnets in the magnet array. The second magnetic pole piece array is configured similarly to the first magnetic pole piece array. One of the first and second magnetic pole piece arrays and the magnet array is relatively moved to the other at a predetermined speed.
    Type: Application
    Filed: November 7, 2014
    Publication date: March 5, 2015
    Inventors: Satoshi Sugita, Yasushi Misawa, Yuqi Tang, Shigenori Miyairi
  • Publication number: 20140042941
    Abstract: The invention discloses a reciprocal radial field electric machine based on the soft magnetic attraction principle, characterized by a plurality of active elements organized as a bi-dimensional cylindrical machine matrix and fed sequentially by an external power converter in order to derive a motoring or generation effect. The machine is comprised of a fixed stator matrix featuring salient poles and electrical coils, and a mobile rotor matrix featuring salient poles. The machine works on the principle of time integration of the discrete actions performed by its active elements. The bi-dimensional matrix organization of the active elements and the algorithms of their activation in both motoring and generation modes are key features for the functional cohesion of the machine. The design of this machine is based on a unique digital modeling method developed by the inventors, using exclusively the matrix calculus adapted to cylindrical matrices.
    Type: Application
    Filed: August 11, 2012
    Publication date: February 13, 2014
    Inventors: John Pricop, Carlos Manuel Carvalheiro
  • Publication number: 20130328430
    Abstract: An electromagnetic coupling comprises a stator, a first rotor in which a first polar tooth and a second polar tooth are provided along a circumferential direction in an alternating manner, and a second rotor. The first rotor comprises a first polar tooth ring in which a plurality of the first polar teeth are provided along a circumferential direction with a gap therebetween, and a second polar tooth ring in which a plurality of the second polar teeth are provided along a circumferential direction with a gap therebetween, and which is placed opposing the first polar tooth ring such that the second polar teeth are placed in respective gaps between adjacent ones of the first polar teeth.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 12, 2013
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Eiji TSUCHIYA, Takao WATANABE, Wataru HIJIKATA
  • Patent number: 8575817
    Abstract: Rotor and stator segments for a generator and motor apparatus are provided. The apparatus includes: a pair of parallel, spaced apart stator segments, each stator segment comprising a stator winding set; and a rotor segment slidably coupled to the pair of stator segments, the rotor segment comprising a magnet and being dimensioned to fit between the parallel, spaced apart stator segments. The apparatus may include a support structure, the rotor segment being slidably coupled to the support structure and the stator segment being attached to the support structure. The apparatus may be a rim generator, wind turbine generator or other electrical machine. The stator winding set includes a stator winding, and may include other electrical or electronic components, including possibly a power factor capacitor, direct current filtering capacitor, supercapacitor, and one or more diodes. The stator winding set may be encapsulated within the stator segment.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: November 5, 2013
    Assignee: Clean Current Limited Partnership
    Inventors: Mihai C. Platon, Virgil F. Young
  • Patent number: 8536758
    Abstract: An electric machine including a rotor (R) with a shaft (4) having a longitudinal axis (x-x) and a stator (S1; S2) with two stator units coaxially disposed one inside and the other outside the rotor (R). The inner stator (S1) having an annular part from which a plurality of teeth (D1) emerge radially and centrifugally. The external stator (S2) having an annular part from which a plurality of teeth (D2) emerge radially and centripetally. The said rotor (R) includes a rotor ring (1) formed by a plurality of parallelepiped permanent magnets (2) having predetermined width, height and length (W2, H2, P2).
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: September 17, 2013
    Inventors: Renzo Lisi, Leonardo Lenzi
  • Patent number: 8358046
    Abstract: An apparatus is disclosed for a hybrid electric power system for use in a multi-wheeled hybrid electric vehicle, and particularly for use in hybrid electric vehicles designed for operation in hostile environments where reliability and survivability of the propulsion system of the vehicle are important. The hybrid electric power system advantageously comprises at least one segmented electrical machine having multiple pairs of parallel stator segments with a magnetic rotor segment between each pair, for generating power from a thermodynamic engine, or for providing power to a driven wheel of the hybrid electric vehicle. A hybrid electric power system is also provided which comprises at least one distributed segmented electrical machine which comprises a distributed electrical energy storage system.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: January 22, 2013
    Inventor: Mihai C. Platon
  • Patent number: 8258737
    Abstract: A rotary electric machine having plural rotary elements in a non-coaxial arrangement is disclosed. The rotary electric machine includes a housing assembly, at least one stator frame mounted in the housing assembly, at least one stator winding wound on the at least one stator frame, and at least two rotors mounted in the housing assembly having axes of rotation that are non-coaxial, wherein each of the at least two rotors is mechanically decoupled from the other rotors such that each of the at least two rotors rotates independent from one another. The rotary electric machine also includes a control unit, with the control unit including at least one electronic control electrically connected to the at least one stator winding. The control unit is configured to control an exchange of power to or from each of the at least one stator windings.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: September 4, 2012
    Inventor: John R. Casey
  • Patent number: 8222792
    Abstract: A generator or motor apparatus having a stator formed of a plurality of pairs of parallel stator segments is provided The pairs of parallel segments are connected together to form a channel in which an annular rotor moves The annular rotor also comprises a plurality of detachable segments connected together to form an annular tram operable to move through said channel Each stator segment comprises a stator winding set and each rotor segment comprises a magnet dimensioned to fit between the parallel spaced apart stator segments The apparatus may include a support structure, the rotor segments being slidably coupled to the support structure and the stator segments being attached to the support structure The apparatus may be a rim generator, wind turbine generator or other electrical machine The stator winding set includes a stator winding, and may include other electrical or electronic components, including possibly a power factor capacitor, direct current filtering capacitor, supercapacitor, and one or more di
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: July 17, 2012
    Assignee: Clean Current Limited Partnership
    Inventors: Mihai C. Platon, Virgil F. Young
  • Publication number: 20110204736
    Abstract: Electric machine comprising a rotor (R) with a shaft (4) having a longitudinal axis (x-x) and a stator (S1; S2) with two stator units coaxially disposed one inside and the other outside the rotor (R). The inner stator (S1) having an annular part (CR1) from which a plurality of teeth (D1) emerge radially and centrifugally. The external stator (S2) having an annular part (CR2) from which a plurality of teeth (D2) emerge radially and centripetally. The said rotor (R) comprises a rotor ring (1) formed by a plurality of parallelepiped permanent magnets (2) having predetermined width, height and length (W2, H2, P2). The width of the teeth of the inner stator unit (S1) is LG1=30% W2; LT1=40% W2.
    Type: Application
    Filed: August 25, 2009
    Publication date: August 25, 2011
    Inventors: Renzo Lisi, Leonardo Lenzi
  • Patent number: 8002056
    Abstract: Systems and methods are provided for an inverter system for use in a vehicle having a first energy source and a second energy source. The system comprises a motor having a first set of windings and a second set of windings. The first set of windings is electrically isolated from the second set of windings. The system further comprises a first inverter coupled to the first energy source and adapted to drive the motor, wherein the first set of windings are coupled to the first inverter. The system also comprises a second inverter coupled to the second energy source and adapted to drive the motor, wherein the second set of windings are coupled to the second inverter. A controller is coupled to the first inverter and the second inverter.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: August 23, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Sibaprasad Chakrabarti, Gregory S. Smith, James M. Nagashima, Brian A. Welchko, Milun Perisic, George John
  • Publication number: 20110148238
    Abstract: The present invention relates to cylindrical rotating electric machines which comprise armature and field source, with either the field source or the dual armature being the rotating component. The dual armature is composed of two concentric cylindrical sets of coils with the field source situated in the gap between the inner and outer armature sections. Relative rotational motion between the field source and armature coils can be achieved by having either one be the rotor. By using two armature coil sections, one inside the field source aperture and the other external to the field source, the flux linkage between the armature and field source can be approximately doubled. The increased flux linkage in the invented technology produces a substantially higher power density than can be obtained with conventional machine technology.
    Type: Application
    Filed: February 28, 2011
    Publication date: June 23, 2011
    Inventors: Carl L. Goodzeit, Millicent J. Ball
  • Patent number: 7884518
    Abstract: An electrical synchronous machine, in particular for use as a drive machine in motor vehicle applications. A stator has an electrical winding arrangement for generating a rotating field. A rotor has magnetic flux generating means for generating a rotor flux with which the rotating field interacts. The rotor has a first rotor section with first magnetic flux generating means and a second rotor section with magnetic flux influencing means. It is possible to move the two rotor sections relative to one another between at least a first and a second relative position in such a way that the rotor flux provided by the rotor has a different magnitude in the two relative positions.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: February 8, 2011
    Assignee: GETRAG Getriebe- und Zahnradfabrik Hermann Hagenmeyer GmbH & Cie KG
    Inventors: Uli Christian Blessing, Alexander Kreim, Ulrich Knoedel, Matthias Beck
  • Publication number: 20100259117
    Abstract: The present invention relates to cylindrical rotating electric machines which comprise armature and field coils, with either the field coil or the dual armature being the rotating component. The dual armature is composed of two concentric cylindrical sets of coils with the field coil situated in the gap between the inner and outer armature sections. Relative rotational motion between the field and armature coils can be achieved by having either one be the rotor. By using two armature coil sections, one inside the field coil aperture and the other external to the field coil, the flux linkage between the armature and superconducting field coil can be approximately doubled. This is a more efficient use of the superconductor. The increased flux linkage in the invented technology produces a substantially higher power density than can be obtained with current conventional superconducting machine technology.
    Type: Application
    Filed: September 17, 2009
    Publication date: October 14, 2010
    Inventors: Carl L. Goodzeit, Millicent J. Ball
  • Publication number: 20100164422
    Abstract: An electric rotary machine is disclosed which can adjust relative angles of sub-rotors continuously and regardless of torque direction without generating an attractive force between the field magnets of the sub-rotors. The electric rotary machine includes: a stator having a winding; a dual rotor which is rotatably disposed with a gap from the stator and divided axially along a shaft into a first rotor and a second rotor each having field magnets with different polarities arranged alternately in a rotation direction; a mechanism for varying the axial position of the second rotor relative to the first rotor continuously; and a non-magnetic member located between the first rotor and the second rotor.
    Type: Application
    Filed: December 23, 2009
    Publication date: July 1, 2010
    Inventors: Kohin SHU, Taizo MIYAZAKI, Houng Joong KIM, Satoru OKABE
  • Patent number: 7511395
    Abstract: A hybrid induction motor comprises a stator fixedly installed in a casing, an induction rotor rotatably inserted into a center of the stator and having a shaft at a center thereof, a first synchronous rotor slid in a longitudinal direction of the shaft between the stator and the induction rotor and free-rotatably installed in a circumferential direction of the shaft, and a second synchronous rotor facing the first synchronous rotor, slid in a longitudinal direction of the shaft between the stator and the induction rotor, and free-rotatably installed in a circumferential direction of the shaft.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: March 31, 2009
    Assignee: LG Electronics Inc.
    Inventors: Seung Do Han, Hyoun Jeong Shin, Jae Hong Ahn
  • Publication number: 20090026862
    Abstract: 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 plurality of bar magnets, are synchronously rotated about a common axis of rotation. A stationary electrically conducting wire extends through the axis of rotation, and radially outwardly therefrom, between the rotating magnetic field. In another embodiment the bar magnets are replaced by pieces of steel which interrupt a unidirectional, magnetic field created by a magnet. The magnet used to create the unidirectional, magnetic field may be an electromagnet. The resultant electrical signal generated in the conductor is unidirectional. The present invention may be used to create brushless DC electrical signals, brushless three-phase DC electrical signals, or a plurality of DC and/or inverted DC signals.
    Type: Application
    Filed: July 24, 2007
    Publication date: January 29, 2009
    Inventor: Stephen Hummel
  • Patent number: 7439644
    Abstract: A hybrid induction motor comprises a stator fixedly installed in a casing, an induction rotor rotatably inserted into a center of the stator and having a shaft at a center thereof, a first synchronous rotor installed between the stator and the induction rotor in a circumferential direction of the shaft so as to be freely rotatable, and a second synchronous rotor facing the first synchronous rotor in a longitudinal direction of the shaft and installed between the stator and the induction rotor so as to be freely rotatable.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: October 21, 2008
    Assignee: LG Electronics Inc.
    Inventors: Jeong-Chul Kim, Dong-Il Lee, Seung-Do Han, Hyoun-Jeong Shin, Jae-Hong Ahn, Seung-Suk Oh
  • Publication number: 20080238232
    Abstract: A motor includes a stator having first and second armatures to form a rotating magnetic field, an inner rotor having first and second permanent magnets, and an outer rotor arranged between the stator and the inner rotor. The outer rotor has a rotor body which supports first and second induction magnetic poles such that they are embedded therein. A phase of the first induction magnetic pole is matched with a phase of the second induction magnetic pole. The first and second induction magnetic poles are assembled to the rotor body such that they are inserted into linear slits formed in the rotor body in the axis direction. Because the first and second induction magnetic poles are aligned in the axis direction, the outer rotor has a simple structure and an increased strength, and also support and assembling of the first and second induction magnetic poles in the outer rotor are facilitated.
    Type: Application
    Filed: February 6, 2008
    Publication date: October 2, 2008
    Inventors: Masashi Bando, Noriyuki Abe, Shigemitsu Akutsu, Satoyoshi Oya
  • Patent number: 7230363
    Abstract: 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 the inner surface of the cylindrical body, the first rotor assembly defining a space to receive a first stator that is independent from the cylindrical body. A second rotor assembly is coupled to the outer surface of the cylindrical body and electrically coupled to the first rotor assembly. A second stator is arranged around the second rotor assembly, independent from the cylindrical body, and radially positioned about the axis of the cylindrical body. By arranging the generator components in such configuration, the axial length of the generator is reduced in comparison to a conventional generator.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: June 12, 2007
    Assignee: Honeywell International, Inc.
    Inventors: David E. Stout, Wayne T. Pearson, Mingzhou Xu, Michael W. Duddeck
  • Patent number: 6791290
    Abstract: The present invention relates to a device in an electronic driving dynamics control system, comprising an electromechanic transducer, especially an electric motor, a hydraulic pump, and an electric actuating unit for the transducer, said transducer including a magnetic or magnetizable stator and a rotor, as well as connections for connecting the actuating unit, and a commutation device for the actuation of electromagnetic windings of the rotor, said invention inhering the special feature that the commutation device comprises three or more commutating elements that are electrically connected to the respective connections so that the windings of the rotor can be actuated individually by the actuating unit, with at least one commutating element being connected to a change-over element that provides for an additional connection for connecting a rotational speed measurement devices.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: September 14, 2004
    Assignee: Continental Teves AG & Co., OHG
    Inventors: Tibor Toth, Holger Wahl, Josko Kurbasa, Jochen Beuss, Achim Netz, Johannes-Dieter Nederstigt
  • Patent number: 6373160
    Abstract: Electric rotary current machine that includes a casing and a stator fitted within the casing. The stator has at least one stator winding. At least two mechanically separate rotors are rotatably mountable within the casing and have a same axis of rotation. In this way, each rotor has electromagnetic interaction with the stator when the stator is electromagnetically active. The rotor speeds are the same or different. A motor control is arranged to control a supply to at least one of said at least one stator winding by superposition of at least two rotary field components, one for each rotor.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: April 16, 2002
    Inventor: Manfred Schrödl
  • Publication number: 20010008355
    Abstract: An improved self-oscillation system for a linear oscillatory actuator composed of a stator and a reciprocator. The stator carries a winding to which an electric current is periodically supplied for making a resonant oscillation of the reciprocator. The system includes a self-oscillation circuit for continuing the resonant oscillation of the actuator by a positive feedback manner based upon a back electromotive force (Vbemf) appearing across the winding. The system further includes a PWM control for increasing the electric current in response to a decreasing oscillation amplitude due to an increasing load applied to the reciprocator. A detector circuit is included to monitor the oscillation amplitude of the reciprocator and provides a corresponding detector output in response to which the self-oscillation circuit provides a drive pulse of varying pulse width for making the PWM control.
    Type: Application
    Filed: January 12, 2001
    Publication date: July 19, 2001
    Applicant: MATSUSHITA ELECTRIC WORKS, LTD.
    Inventors: Halit S. Gokturk, Satoshi Nakayama, Kozo Kawai, Hideaki Abe, Toyokatsu Okamoto
  • Patent number: 6160330
    Abstract: A three-phase stepping motor comprising: a rotation shaft rotatably supported by a pair of bearings provided in predetermined places of a housing so as to be in opposition to each other; a permanent-magnet rotor formed in a cylindrical shape so as to have south (S) and north (N) poles magnetized alternately in the direction of rotation on an outer circumferential portion of the rotor, or an induced magnetization rotor having S and N poles disposed alternately in the direction of rotation which are formed in a manner so that permanent magnets with the same polarity are fitted or formed so as to be identical in polarity at their surfaces in grooves formed parallelly to each other at a regular pitch in a surface of a magnetic body formed to be cylindrical in parallel to the rotation shaft and the cylindrical magnetic body is subjected to induced magnetization to form the S and N poles alternately in the surface of the cylindrical magnetic body; and a stator disposed so as to be in opposition to a surface of one
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: December 12, 2000
    Assignee: Japan Servo Co., LTD
    Inventor: Masafumi Sakamoto
  • Patent number: 5814913
    Abstract: A multishaft electric motor has a plurality of juxtaposed rotors having respective permanent magnets disposed therearound, and a plurality of sets of armature elements disposed fully circumferentially around the rotors, respectively, the permanent magnets of adjacent two of the rotors having a plurality of pairs of unlike magnetic poles for magnetically coupling the rotors through the armature elements between the permanent magnets. A positive-displacement vacuum pump includes a casing, a pair of pump rotors rotatably disposed in the casing in confronting relation to each other, and a two-shaft electric motor coupled to the pump rotors for rotating the pump rotors in opposite directions. The two-shaft electric motor may comprise a pair of juxtaposed rotors and a pair of sets of armature elements disposed fully circumferentially around the rotors, respectively.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: September 29, 1998
    Assignee: Ebara Corporation
    Inventors: Yoshinori Ojima, Kozo Matake, Genichi Sato, Yasushi Hisabe, Masami Nagayama, Katsuaki Usui, Hiroaki Ogamino
  • Patent number: 5672926
    Abstract: A hybrid-energized electric machine includes a laminated stator core that has a stator winding and is arranged in a magnetic yoke, where the rotor is divided axially into two rotor halves, and each rotor half has permanent-field poles and non-energized poles arranged in succession in accordance with the pole pitch, where one rotor half is fitted with permanent magnets of one polarity (N) and the other rotor half is fitted with permanent magnets of the other polarity (S), and the permanent-field poles of both rotor halves are offset with respect to each other by one pole pitch, and said electric machine is also provided with an electric field coil designed as a ring coil. Both scattering and line losses can be reduced due to the fact that rotor halves are arranged on the rotor shaft with an axial distance between them, and field coil is inserted into the space between rotor halves.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: September 30, 1997
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jurgen Brandes, Uwe Schuller
  • Patent number: 5172784
    Abstract: A hybrid electric vehicle propulsion system having an external combustion free-piston engine is provided with an integral linear electric current generator and a pulse frequency controller. The system includes a power integration processor, a frequency modulator circuit and a pulse width modulator circuit, the power integration processor controls the frequency modulator circuit and the pulse width modulator circuit to produce both a frequency modulated pulsed current and an auxiliary power current which varies in pulse width. Both the frequency modulated pulsed current and the pulse width modulated auxiliary current are combined to power an electric drive motor having an integral electronic differential. A small auxiliary power source, such as a rechargeable battery pack, is provides the auxiliary current for acceleration and hill climbing power. The external combustion engine may burn any pollution free fuel (such as natural gas, alcohol, propane, etc.
    Type: Grant
    Filed: April 19, 1991
    Date of Patent: December 22, 1992
    Inventor: Arthur A. Varela, Jr.
  • Patent number: 5068554
    Abstract: An electric motor suitable for incorporation in pipestacks for drilling and pumping applications has a drive shaft (4) carrying spaced rotor discs (6) driven by annular stator windings (7) carried by the motor housing wall. The windings (7) are organized as linear motors operating on a circular path and provision can be made for energization of the windings so as to cause axial movement of the shaft, for hammering or braking action. The shaft (4) can be tubular to provide a passage for drilling mud, or for a fluid being pumped.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: November 26, 1991
    Assignee: Framo Developments (UK) Limited
    Inventor: Frank Mohn
  • Patent number: 4866321
    Abstract: A brushless electrical machine has a stator assembly with spaced coils and a rotor assembly with spaced permanent magnets and with axial air gaps between the assemblies. The magnets define rotatable flux-producing modules and the coils are in positions adjacent to the paths of travel of the magnets. The machine can be operated as a low speed, high torque motor or as a low speed, high power output generator with output characteristics proportional to the number of axially interleaved stator and rotor assemblies.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: September 12, 1989
    Assignee: William C. Lamb
    Inventors: Hubert J. Blanchard, Cornelius J. Fruge
  • Patent number: 4745318
    Abstract: An induction motor having a stator with a stator winding, and a rotor coupled with a shaft 10 and separated from the stator by an air gap 13, wherein the rotor includes a current conducting element 5,15 and a magnetically excitable member 4, and in the air gap 13 formed between the stator and the magnetically excitable member 4, a rotary element 6 is arranged, made from a permanent magnetic material and supported freely running with respect to the rotor.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: May 17, 1988
    Assignee: Ipari Muszergyar Iklad
    Inventor: Laszlo Ivanics
  • Patent number: 4644207
    Abstract: An integral combination of two motor pumps wherein two pumps 12, 14 are operated preferably from the motor shafts 41, 43 of a centrally located, pancake-type, d.c., brushless electric motor 10, the entire combination being housed in a unitary casing. The stator 22 is located within a central peripheral cavity between a pair of rotor faces 26, 28 in which are set spaced permanent mangets 32, 34 which react with the commutated d.c. fields of the stator coils to rotate the rotors 36, 38. Each rotor, e.g. 38, is integral with a motor shaft section which is integrally coupled with a pump shaft, e.g., 44. The pump shaft 44 supports an inducer 46 and an impeller 48 which pump a fluid that is also sent through passages in the motor 10 to lubricate the sleeve bearings 54 and to cool the motor components. The speeds of the rotor 36, 38 can be individually adjusted, for example, by adjusting the number of permanent magnets 32, 34 in each rotor face 26, 28.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: February 17, 1987
    Assignee: Rockwell International Corporation
    Inventors: Fritz C. Catterfeld, Ralph E. Kroy
  • Patent number: 4613779
    Abstract: An electrical pulse generator comprising a series of electromagnets spatially positioned about the outer circumference of a disc-like base and a second series of complimentary electromagnets positioned about an inner position on said disc. One of each of said first and second series electromagnets positioned relative to each other creating a magnetic field therebetween. A second disc-like base rotatable above and parallel with said first disc. A continuous coil winding ring mounted on the underside of said second disc and positioned relative to said first and second series of electromagnets to traverse said magnetic field upon rotation of said second disc and thereby inducing a voltage/current potential in said coil winding.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: September 23, 1986
    Inventor: Stanley A. Meyer
  • Patent number: 4593218
    Abstract: Apparatus which has a permanent magnet rotor magnetically coupled to a control field permanent magnet, the magnets being rotatable about respective rotational axes of support that are perpendicular to one another. The magnetic axis of each magnet is perpendicular to the rotational axis of that magnet, so that the rotor magnet changes in attitude about its rotational axis in response to a change in the magnitude and sense of the control field component perpendicular to the rotational axis of the rotor magnet. Such a change of the perpendicular control field component is caused by turning the control field magnet about its rotational axis through motor-driven reduction gearing including a worm and gear combination which holds the rotor magnet at its adjusted attitude after the motor is deenergized.
    Type: Grant
    Filed: January 31, 1985
    Date of Patent: June 3, 1986
    Inventor: Edward C. Streeter
  • Patent number: 4387335
    Abstract: A dynamo with a stationary armature and with two rotors, with the frequency of the armature current the same as the frequency of the field excitation and independent of the speed of rotation of the rotors. The rotors have opposite instantaneous magnetic polarities, are magnetically connected and rotate in opposite directions on concentric shafts. Field excitation may be dc or single-phase ac. Disk or tubular rotor and stator structures may be used. Dynamos according to the invention may function as a d-c generator, an a-c generator, an amplifier, as a-c or d-c rotary transformers, and as a-c or d-c motors.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: June 7, 1983
    Inventors: Charles B. Fisher, Sidney T. Fisher
  • Patent number: 4334164
    Abstract: Each of the motor stator poles has a window cut out which functions to create an unbalanced flux distribution and move the magnetic neutral off the centerline of the stator pole. A plurality of permanent magnet rotors are mounted on a common shaft to permit a desired rotor to be moved into the stator field. Each rotor has a different number of poles selected so with any rotor there will always be a whole odd number of poles within the span of a stator pole. Speed is determined by the number of poles in the rotor in operative position.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: June 8, 1982
    Assignee: The Singer Company
    Inventors: Kenji Yatsushiro, George F. Kuchuris
  • Patent number: 4316109
    Abstract: In a high starting torque concentric rotor D.C. magnetic motor the back e.m.f. is greatly reduced by reducing the area of magnetic flux acting on the rotors to an arc of the respective rotor circumference spanning the number of the rotor segments spanned by the respective rotor brush contacting the commutator segments. A pair of parallel magnetic pole plates of opposite polarity are energized by a coil extending therebetween. Both rotors are supported adjacent one pole plate with their axis normal to the pole plate and in axial alignment with the coil. A plurality of equally spaced pole pieces, connected with a respective pole plate, extend in interdigitated relation parallel with the axis of the rotors in the spacing therebetween and in close spaced relation with respect to the inner peripheral portions of the outer rotor and circumferential portions of the inner rotor periphery.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: February 16, 1982
    Inventor: Elmer B. Mason
  • Patent number: 4283646
    Abstract: The invention relates to a brushless type electric motor having an axial air gap and is directed to a particular design and arrangement for the pole shoes thereto.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: August 11, 1981
    Assignee: Danfoss A/S
    Inventors: Poul E. Hansen, Jan Dyhr
  • Patent number: 4280072
    Abstract: An electric rotating machine includes a field permanent magnet which is permanently magnetized to N and S poles alternatively and an armature core which is arranged coaxially with the magnet and has a plurality of salient poles facing to the magnet. Poly-phase coils are wound on the root of the salient poles. By providing an indented portion at the major face of the salient pole facing the magnet, the cogging torque can be remarkably reduced, and further by providing auxiliary salient poles ripple torque can be also reduced.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: July 21, 1981
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Makoto Gotou, Kazutsugu Kobayashi, Kenichiro Okumura
  • Patent number: 4187441
    Abstract: A multiple disk, pancake, self-fed brushless dc motor characterized by high power density has a variable number of interleaved, axially spaced rotor and stator disks. The annular rotor disks are made of high coercive force permanent magnets such as cobalt-samarium and ferrites which do not demagnetize easily. The annular stator disks are yokeless and include a spirally wound laminated magnetic core made of steel strip or amorphous metal ribbon with opposing sets of stator slots and windings on both sides of the core. The permanent magnet machine can be operated as a generator.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: February 5, 1980
    Assignee: General Electric Company
    Inventor: Wilford R. Oney
  • Patent number: 4092569
    Abstract: This disclosure relates to electric motor/actuators and in particular to an electric motor/actuator including multiple non-magnetic armatures having commutated windings rotatable in a single air gap formed between opposing permanent magnets having their opposed polarized poles facing said armatures and wherein individual ones of said armatures are capable of different output functions from others of said armatures.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: May 30, 1978
    Assignee: The Singer Company
    Inventors: John Addison Herr, Wolfgang Jaffe
  • Patent number: 4086506
    Abstract: An apparatus for receiving electrical energy in amounts of the order of hundreds of megajoules, converting the electrical energy to mechanical energy for storage, and delivering the stored energy as electrical energy in times of the order of a second comprises a sequence of stacked electrically conducting cylindrical shells having a common axis. The conducting shells are free to rotate and are separated by stationary insulating cylindrical shells. Adjacent conducting shells are connected electrically by brushes at the edges and a radial magnetic field is caused to pass through the conductors. The apparatus permits the reversal in a plasma heating coil of electric currents of amplitudes up to 100,000 amperes in a time of the order of a second.
    Type: Grant
    Filed: August 5, 1976
    Date of Patent: April 25, 1978
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Robert L. Kustom, Robert B. Wehrle
  • Patent number: 4082971
    Abstract: A printed motor making use of rotors fitted with two sheets of disk-shaped armatures at right angle to a rotary shaft of the motor, wherein a metallic intermediate ring is inserted between said armatures to improve heat radiation performance of the armatures, thus to provide a small sized motor having large output.
    Type: Grant
    Filed: February 10, 1977
    Date of Patent: April 4, 1978
    Assignee: Nihon Radiator Co., Ltd. (Nihon Rajieeta Kabushiki Kaisha)
    Inventors: Shiuichi Miyake, Takao Saito
  • Patent number: 3999092
    Abstract: An axial gap synchronous dynamoelectric machine consists essentially of a disc-shaped rotor having axially oriented permanent magnet pole bodies with faces lying in an annular surface; a stator core spaced axially from the pole faces; and a discoidal AC winding linked with the pole bodies and the core. The winding consists of a plurality of coils laid overlapping in an annular array and bonded together with a resinous material into a unitary structure having an annular disc portion containing the coil sides and inner and outer ring portions containing the coil end-heads. It is supported by the stator with its disc portion in the space between the stator core and the pole faces, and its disc portion is spaced axially from the pole faces.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: December 21, 1976
    Assignee: Canadian General Electric Company Limited
    Inventor: Eric Whiteley
  • Patent number: 3973137
    Abstract: A multi-rotor electric motor having a wound main rotor mounted on a drive shaft which is rotatable within a cup-shaped stator, which is so wound, that when connected to a source of polyphase power, as to provide a rotating magnetic field. A second rotor equipped with permanent magnets is mounted for rotation about and exteriorly of the stator and which are effected by the rotating magnetic field so as to tend to rotate the second rotor at synchronous speeds in the same direction as the main rotor. The two rotors are normally connected for mutual rotation between starting speed and pre-determined speed less than synchronous speed by a spring-closed centrifugally-opened clutch assembly which disengages when the main rotor reaches said pre-determined speed so as to enable both rotors to rotate independently of each other and which re-engages both rotors for mutual rotation when the speed of the main rotor falls below said pre-determined speed.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: August 3, 1976
    Inventor: Dezso Donald Drobina
  • Patent number: 3944863
    Abstract: An inductor machine with an armature winding common for all the stator packs and a stationary annular field winding disposed under the armature winding intermediate the toothed rotor packs, differing from the prior art inductor machines in that the field winding is enclosed in a member made up of one or two flanges enveloping the field winding and attached to the end faces of keys equidistantly arranged along the circumference of the inner surface of the machine frame.
    Type: Grant
    Filed: April 30, 1974
    Date of Patent: March 16, 1976
    Inventors: Voldemar Voldemarovich Apsit, Lev Eduardovich Dombur, Yan Yanovich Lutsavs, Vladislav Alexandrovich Pugachev, Mikhail Ivanovich Schukin, Sauljus Antanovich Dirzhis, Iozas Ionovich Karosas, Algis Vladislavovich Pashtukas, Leonid Borisovich Khlavnovich
  • Patent number: 3939370
    Abstract: The disclosure is of a variable speed three-phase motor with a intermediate rotor and inner rotor, where the pack of laminations of the main rotor is prolonged as an annular pack of laminations in the direction of the longitudinal axis with short-circuit rods extending over the whole length of the stator, thereby forming an annular intermediate rotor inside which the inner rotor with its short-circuit rods rotates.
    Type: Grant
    Filed: June 18, 1974
    Date of Patent: February 17, 1976
    Inventor: Arnold Muller