Spark-reduction Patents (Class 310/220)
  • Patent number: 10649011
    Abstract: A shaft grounding and monitoring system may include a grounding member slidingly engageable with a rotating shaft. An electrical sensor may be configured to be coupled with the grounding member in order to detect an electrical parameter that provides an indication of electricity flowing from the rotating shaft to ground through the grounding member. A processor may be operably coupled with the electrical sensor and may receive and analyze data from the electrical sensor. The processor may be configured to periodically analyze the data representing the electrical parameter from the electrical sensor at a sampling rate and for a sampling period that is related to a rotation speed of the rotating shaft. A memory may be operably coupled with the processor and may be configured to store data processed by the processor that is representative of the data provided by the electrical sensor.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: May 12, 2020
    Assignee: CUTSFORTH, INC.
    Inventors: David A. Jahnke, Robert S. Cutsforth, Dustin L. Cutsforth
  • Patent number: 10411550
    Abstract: A motor includes a rotor, a brush card assembly arranged to supply an electric current to the rotor, a housing, a permanent magnet, and a bearing. The rotor includes a core fixed to a shaft, a coil arranged to excite the core and a commutator connected to the coil. The coil is wound around the core in a concentrated winding method. The brush card assembly includes at least one pair of brushes having different polarities, the brushes disposed along a circumferential direction and connected to each other via the commutator and the coil, a X capacitor parallel-connected to the brushes, Y capacitors parallel-connected to the brushes and a brush card arranged to hold the brushes, the X capacitor and the Y capacitors. The brush card includes a ground portion. The X capacitor is positioned between the brushes in the circumferential direction. The Y capacitors are connected to the ground portion.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: September 10, 2019
    Assignee: NIDEC CORPORATION
    Inventors: Takahiro Hiwa, Shohei Osuga
  • Patent number: 10003241
    Abstract: A vehicle inverter device is configured to convert DC power to AC power. The vehicle inverter device includes a circuit having switching elements and a noise reducer. The noise reducer is provided on an input side of the circuit and is configured to reduce common mode noise and normal mode noise contained in the DC power. The noise reducer is configured by a common mode choke coil, which includes a core, a first winding wound about a first winding portion of the core, and a second winding wound about a second winding portion of the core.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: June 19, 2018
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Atsushi Naito, Yoshiki Nagata, Fumihiro Kagawa, Shunsuke Ambo
  • Patent number: 9899983
    Abstract: One embodiment provides an electronic control unit. The electronic control unit includes a housing and a noise filter. The housing includes an accommodating portion, and the accommodating portion includes a support portion. The noise filter includes an engaging portion, and at least part of the noise filter is housed in the accommodating portion of the housing. When the at least part of the noise filter is housed in the accommodating portion of the housing, the engaging portion is in engagement with the support portion.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: February 20, 2018
    Assignee: AUTOLIV NISSIN BRAKE SYSTEMS JAPAN CO., LTD.
    Inventors: Motoyasu Nakamura, Tetsuo Kobori, Sotaro Kanai, Sekihei Shimozono, Kouji Sakai
  • Patent number: 9825502
    Abstract: An electric motor includes a rotor which is rotatably supported by a first bearing which is provided at a first end part on an output shaft side and a second bearing which is provided at a second end part opposite to the first end part, a stator which is provided with a winding and which surrounds the rotor, a front housing part which supports the first bearing and which forms a winding accommodation space which accommodates the winding, a rear housing part which supports the second bearing, an air feed port to which pressurized air is fed, and an air flow path which linearly extends from said air feed port to a space surrounding the first bearing and communicates with the winding accommodation space.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: November 21, 2017
    Assignee: FANUC CORPORATION
    Inventor: Youhei Kamiya
  • Patent number: 9467037
    Abstract: An electric power tool of an embodiment of the present invention uses a motor provided with a yoke as a drive source, and is configured such that an end portion of an electric component mounted on a drive circuit of the motor is electrically connected to the yoke of the motor through a conductive elastic body.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: October 11, 2016
    Assignee: MAKITA CORPORATION
    Inventors: Shingo Kamiya, Junichi Nishikimi, Yoshifumi Morita
  • Patent number: 9385576
    Abstract: A rotatory device (1) for energy conversion between electrical energy and mechanical energy includes an end cap (20) to which electric conduction and commutation components (30) are attached. The end cap (20) is electrically insulating and has a flange mating to an electric conductive housing (10) of the rotatory device (1). An unpackaged capacitor (40) is positioned between the housing (10) and the flange (20) without occupying other space inside the housing (10) of rotatory device (1). The unpackaged capacitor (40) is electrically coupled to the electric conduction and commutation component and grounded to the housing (10) of the rotatory device (1).
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: July 5, 2016
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Maoxiong Jiang, Tongjie Li, Qingbin Luo, Xinpeng Wei, Huiting Zhong
  • Patent number: 8664812
    Abstract: The current diverter rings and bearing isolators serve to dissipate an electrical charge from a rotating piece of equipment to ground, such as from a motor shaft to a motor housing. One embodiment of the current diverter is substantially arc shaped with a plurality of radial channels extending there through. A conductive assembly may be positioned in each radial channel such that a contact portion of the conductive assembly is positioned adjacent a shaft passing through the center of the current diverter ring. The arc-shaped body may be particularly useful during installation over certain existing shafts.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: March 4, 2014
    Inventors: Dwight A. Vicars, Robert A. Tejano, David C. Orlowski
  • Publication number: 20130342071
    Abstract: Disclosed is a motor, the motor according to an exemplary embodiment of the present disclosure including a stator arranged at an inner surface of a housing and including a magnet, a rotor core centrally arranged at the stator to pass through a rotation shaft, a rotor including an insulator covering the rotor core and a coil wound on the insulator, a commutator coupled to the rotation shaft to be electrically connected to the coil, and a brush coupled to the housing to be closely contacted to the commutator, wherein the insulator is formed with a short-circuit prevention unit formed on a drop path of conductive particles in order to prevent the short-circuit between the rotor core and the commutator from being generated by the conductive particles generated by the commutator and the brush.
    Type: Application
    Filed: June 21, 2013
    Publication date: December 26, 2013
    Inventor: Woo Seob SHIM
  • Patent number: 8604653
    Abstract: The current diverter rings and bearing isolators serve to dissipate an electrical charge from a rotating piece of equipment to ground, such as from a motor shaft to a motor housing. One embodiment of the current diverter ring includes an inner body and an outer body configured to clamp at least one conductive segment between them. In the preferred embodiments of the current diverter ring, the conductive segments are positioned in radial channels. The outer body may be affixed to a shaft, a motor housing, a bearing isolator, or other structure. The bearing isolator may incorporate a retention chamber for holding conductive segments within the stator of the bearing isolator, or the bearing isolator may be fashioned with a receptor groove into which a current diverter ring may be mounted.
    Type: Grant
    Filed: April 18, 2011
    Date of Patent: December 10, 2013
    Assignee: Inpro/Seal, LLC
    Inventors: David C. Orlowski, Neil F. Hoehle, Robert A. Tejano, Shawn Horton
  • Publication number: 20130057108
    Abstract: Systems for grounding components in a machine are disclosed. In one embodiment, a system includes: an inner component configured to be connected to a shaft; a ground component configured to be disposed substantially about the inner component, the ground component configured to complement the inner component and substantially define a cavity there between; and a conductive substance disposed within the cavity substantially between the inner component and the ground component, the conductive substance configured to electrically connect the inner component and the ground component.
    Type: Application
    Filed: September 7, 2011
    Publication date: March 7, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Purushothaman Sasidharan Nair
  • Patent number: 7928629
    Abstract: A stator has four or more magnetic poles. A commutator has a plurality of segments arranged in the circumferential direction and a short-circuit conductor for short-circuiting predetermined segments from among these segments. Each segment has an angular width WS, and there is a gap of an angular width WU between the segments. A substantial angular width WB of each of an anode brush and a cathode brush satisfies (n?1)(WS+WU)+WU<WB<n(WS+WU)+WU, where n is an integer no less than two. A plurality of coils are each connected to the corresponding one of the segments in order to form n closed loops. The closed loops each pass through the corresponding segments and are electrically independent of each other.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: April 19, 2011
    Assignee: ASMO Co., Ltd.
    Inventors: Tomohiro Aoyama, Yasuhide Ito, Toshio Yamamoto
  • Patent number: 7888838
    Abstract: In an electrical device, in particular a power tool, equipped with a commutator motor, and in an accessory for an electrical device of this kind, a carbon brush shape adapting device is an integral component of the electrical device or of the accessory.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: February 15, 2011
    Assignee: Robert Bosch GmbH
    Inventor: Florian Esenwein
  • Publication number: 20100141081
    Abstract: The mold commutator of the present invention comprises a plurality of commutator segments made of copper or copper alloy and circumferentially arranged, a plurality of spark absorbing elements, disposed between adjacent commutator segments, with paired parallel surfaces respectively having electrodes thereon, and a resin mold portion which integrates these portions into one piece. The spark absorbing element is electrically connected to the commutator segment via the electrode, and spark voltage generated at the commutator segment is absorbed by current flowing between the electrodes.
    Type: Application
    Filed: April 8, 2008
    Publication date: June 10, 2010
    Applicant: Panasonic Corporation
    Inventors: Noriteru Maeda, Hirofumi Mizukami, Akihiko Yamazaki, Seiji Kurozumi, Yoshikazu Yamagata
  • Patent number: 7642687
    Abstract: The number of conductor members in a first conductor member group and the number of conductor members in a second conductor member group are equal to each other and are odd numbers. An inner terminal of each conductor member is displaced from an outer terminal of the same conductor member by 90 degrees with respect to the circumferential direction of the corresponding conductor member group. Each outer terminal of the first conductor member group is displaced from a corresponding one of the outer terminals of the second conductor member with respect to the circumferential direction of the first conductor member group.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: January 5, 2010
    Assignee: Asmo Co., Ltd.
    Inventors: Ryohei Kageyama, Toshio Yamamoto
  • Patent number: 7626307
    Abstract: The number of conductor members in a first conductor member group and the number of conductor members in a second conductor member group are equal to each other. An inner terminal of each conductor member is displaced from an outer terminal of the same conductor member with respect to the circumferential direction of the corresponding conductor member group. Each outer terminal of the first conductor member group is displaced from a corresponding one of the outer terminals of the second conductor member with respect to the circumferential direction of the first conductor member group.
    Type: Grant
    Filed: May 9, 2008
    Date of Patent: December 1, 2009
    Assignee: Asmo Co., Ltd.
    Inventors: Ryohei Kageyama, Toshio Yamamoto
  • Patent number: 7352103
    Abstract: A motor assembly includes a commutator having a shaft extending axially therefrom, a commutator end bracket assembly, and at least two brushes carried by the commutator end bracket assembly and in contact with the commutator. A disc is carried by the commutator for rotation therewith. The commutator includes a notch and the disc is rotatable therein.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: April 1, 2008
    Assignee: Ametek, Inc.
    Inventor: James P. Shawcross
  • Patent number: 7109628
    Abstract: A motor has a plurality of excitation coils, a commutator having a plurality of segments, a plurality of supply brushes and a short-circuit line. Each coil is connected to corresponding ones of the segments. The supply brushes include a plurality of supply brushes each having one of an anode and a cathode. At least one supply brush has the other one of an anode and a cathode. The supply brushes each simultaneously contact different one of the segments. The short-circuit line short-circuits segments that simultaneously contact the supply brushes of the same pole. The supply brushes of the same pole separate from the short-circuited segments at different times.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: September 19, 2006
    Assignee: ASMO Co., Ltd.
    Inventors: Toshio Yamamoto, Shinji Santo, Kazumitsu Moriya, Masayuki Kuwano, Kaname Egawa
  • Patent number: 7102266
    Abstract: A motor assembly includes a commutator having a shaft extending axially therefrom, a commutator end bracket assembly, and at least two brushes carried by the commutator end bracket assembly and in contact with the commutator. A seal is carried by either the commutator or the commutator end bracket assembly and has engaging contact with the other. The seal may be disposed on either or both sides of the commutator.
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: September 5, 2006
    Assignee: Ametek, Inc.
    Inventor: Michael Coles
  • Patent number: 7084547
    Abstract: A commutator includes six segments disposed in the direction of rotation, and is attached to one axial end of an armature. By the commutator rotating together with the armature, each of the segments successively contacts a brush. Each of the segments is electrically connected with terminals through mid-terminals. Three of the six terminals, non-adjacent and alternatingly located in the direction of rotation, are electrically connected directly with mid-terminals facing in radial opposition. Capacitors are electrically connected directly with the terminals adjacent in the direction of rotation. Discharge does not occur between the brush and segments when the brush separates from the segments accompanying rotation of the armature, since electromagnetic energy built up in the coils of the armature is temporarily built up in the capacitors.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: August 1, 2006
    Assignee: Denso Corporation
    Inventors: Kiyonori Moroto, Motoya Ito, Kenzo Kiyos, Eiji Iwanari, Masayuki Kobayashi
  • Patent number: 7045926
    Abstract: A commutator for an electric motor includes a support ring, a plurality of metal segments arranged around a circumference of the support ring, and a plurality of capacitors arranged between the support ring and the metal segments. Each capacitor is connected between two adjacent metal segments.
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: May 16, 2006
    Assignee: ArvinMeritor Light Vehicle Systems - France
    Inventors: Francois Breynaert, Hermann Yvetot
  • Patent number: 7030582
    Abstract: Devices and methods for controlling brushless, sensorless DC motors are disclosed. In one embodiment, an electrical motor is provided with a rotor, a stator, and a semiconductor on insulator (SOI) application-specific integrated circuit (ASIC). The ASIC is configured to energize stator windings in a commutational sequence to drive the rotor. A motor controller embodiment is provided with a set of comparators and a clocked digital circuit. Each comparator determines a voltage polarity on a respective stator winding. The clocked digital circuit receives polarity signals from the comparators and detects zero crossings having an expected crossing direction, which are then used to determine a commutational sequence for energizing stator windings. A method embodiment is provided for driving DC motor windings. One method embodiment includes: receiving polarity signals, measuring intervals, and advancing a commutation state.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: April 18, 2006
    Assignee: Halliburton Energy Services, Inc.
    Inventor: James E. Masino
  • Patent number: 7019425
    Abstract: The invention is related to a device for the noise suppression of small electric motors with a Cx capacitor to be installed between two connections (A1, A2) of the small electric motor as well as Cy capacitors installed between each of the connections (A1, A2) and a ground of the small electric motor, wherein the Cx capacitor and the Cy capacitors are combined in a disk-shaped component (1) which can be mounted on a housing cover (13) for the small electric motor or is integrated in the housing cover (13).
    Type: Grant
    Filed: July 21, 2004
    Date of Patent: March 28, 2006
    Assignee: Sintertechnik GmbH
    Inventors: Jochen Langguth, Kathrin Langguth, Michael Sax, Valerij Korsuchin
  • Patent number: 6987344
    Abstract: A rotary transformer has a bus duct assembly that extends through the hollow shaft of a rotary transformer from collector or slip rings positioned above a drive motor for the rotary transformer to end windings of the rotor positioned most remote from the drive motor. By positioning the leads of the bus duct connection with the rotor end windings on the rotor end windings most remote form the drive motor, the shaft strength and integrity is not reduced due to the torque applied by the drive motor. Further, the shaft is formed from two coupled shaft sections and the bus duct assembly comprises two L shaped sections each positioned substantially within a corresponding shaft section. The bus duct sections are interconnected to complete the bus duct assembly making it simpler to remove the first or upper shaft section from the second or lower shaft section during field servicing.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: January 17, 2006
    Assignee: General Electric Canada Inc.
    Inventors: Michael Walter White, Bruce William Mills, Robert Henry Rehder
  • Patent number: 6895176
    Abstract: A permanent magnet DC brushless motor control assembly permits a user to select the permanent magnet DC brushless motor operating characteristics by selecting appropriate control circuits to interface with the motor. The assembly includes a permanent magnet DC brushless motor, a commutator electrically coupled to the motor, and at least one control module electrically coupled to the commutator, to control operating characteristics of the permanent magnet DC brushless motor.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: May 17, 2005
    Assignee: General Electric Company
    Inventors: William R. Archer, Brian L. Beifus, Roger C. Becerra, Kamron M. Wright
  • Patent number: 6867515
    Abstract: The invention concerns an interference suppression system in an engine with permanent magnets activating a functional motor vehicle element, wherein the engine (1) comprises powering brushes (8, 9), connected to an external power source (12) with wires (10, 1) and a metal field magnet frame (2). The invention is characterized in that each brush (8, 9) is connected to the engine metal field magnet frame (2) through at least an interference suppression capacitor (13, 14) and the engine (1) metal field magnet frame (2) is connected to the vehicle earth connection (15).
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: March 15, 2005
    Assignee: Meritor Light Vehicle Systems France
    Inventor: Fran├žois Breynaert
  • Patent number: 6822365
    Abstract: A small brush motor which uses a three-electrode varistor and which suppresses disconnection or short-circuits of crossover wires of coils.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: November 23, 2004
    Assignees: Sanyo Seimitsu Co., Ltd., Sanyo Electric Co., Ltd.
    Inventor: Zendi Mori
  • Patent number: 6806603
    Abstract: A flat type vibration motor includes a rotor rotatably assembled between a stator and a housing, wherein the rotor includes an insulator of eccentric mass integrally containing at least a winding coil corresponding to the magnet and a weight arranged eccentrically adjacent to the winding coils, and an upper board mounted on an underside of the insulator; a plurality of brushes; a plurality of annular slip rings arranged on an underside of the upper board to be concentric with the shaft, each of the rings contacting an upper end of each of the brushes; and an IC chip for converting the direction of electric current flowing through the winding coils by alternating the polarity of electric current which is introduced to the slip rings via the brushes and then supplied to the winding coil.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: October 19, 2004
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Joon Choi, Ki Hyung Kim
  • Patent number: 6744170
    Abstract: A brush assembly for an electric motor has a base which secures the brush assembly to a motor spider. A brush housing is associated with the base and has first and second open ends. A brush defining an axis is movably positioned in the housing between the first and second open ends. The brush extends from one of the open ends of the housing. The brush includes a surface which is at a desired angle with respect to the brush axis. A biasing member exerts a force on the brush to bias the brush into an electrical connection with a commutator. An electrical connector electrically couples the brush to provide an electrical connection between the commutator and a power supply.
    Type: Grant
    Filed: February 6, 1998
    Date of Patent: June 1, 2004
    Assignee: Black & Decker Inc.
    Inventors: Hung T. Du, Todd A. Hagan
  • Patent number: 6734594
    Abstract: A vibration motor having a rotor and a stator is provided. The vibration motor includes a commutator mounted on the rotor and a brush mounted on the stator. The brush is line contact with the commutator of rotor in order to maintain a stable contact between the commutator and the brush and to reduce spark between the commutator and the brush due to the stable line contact between the commutator and the brush.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: May 11, 2004
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Ta Kyoung Lee, Woo Seok Yang
  • Patent number: 6724121
    Abstract: An improved flat or cylindrical mechanical electric commutator with neutral segments (4) between the current carrying segments which allow the current carrying carbon brushes (11, 12, 13, 14) in a brush holder (7) to pass from a negative current carrying segment to a positive current carrying segment or the opposite charge current in the base of the commutator without allowing the face or any part of the carbon brush to touch both the negative and positive segments in the base of the commutator at the same time, resulting in the switching of the electric current to an energized coil of an electric motor, electrical generator or electric apparatus or device, at predetermined intervals and times to suit the design requirements of the energized coil, electric motor of the stepper, brushless DC and switched design, electric generator or electric apparatus or device, while the commutator can accommodate single phase electrical circuits, double phase electrical circuits, three phase electrical circuits or any numbe
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: April 20, 2004
    Inventor: John Patrick Ettridge
  • Patent number: 6700289
    Abstract: A DC commutator motor that is driven by a direct current power source obtained by rectifying an alternating current power source includes a plus-side brush made of material having a high resistivity and a minus-side brush made of material having a low resistivity. A capacitor is inserted in and connected parallel to the direct current power source. The commutator motor makes use of specials tubes having different shapes to avoid an incorrect insertion of one of the specials tubes into the insertion hole designed to receive the other of the specials tubes.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: March 2, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tsuyoshi Konishi, Shiro Tateishi, Hiroshi Nishimura
  • Patent number: 6479917
    Abstract: To present a motor brush structure capable of decreasing the current ripple and torque ripple substantially while minimizing the cost increase, and, by using the same motor, a motor-driven power steering device capable of suppressing generation of working sound, magnetostriction sound, radio noise, and cogging feel during steering operation. In a motor-driven power steering device used as a steering device for turning wheels such as front wheels of an automobile, a pair of shunt brushes for shunting are added to a pair of main brushes, these shunt brushes are disposed at positions for geometrically inverting the brush contact positions with segments, and it is composed so that the waveforms of the current flowing in the main brushes 11 from each segment of a commutator to each coil, the current into the shunt brushes, and the shunted current may be mutually inverted in phase to cancel each other.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: November 12, 2002
    Assignee: Mitsuba Corporation
    Inventor: Takeshi Yamazaki
  • Patent number: 6417595
    Abstract: In one embodiment of the present invention, an electric motor is provided. A component of the electric motor, the commutator assembly, has a commutator and a brush assembly. The brush assembly encloses conductive brushes that are in contact with the commutator. A shaft is rotatably mounted about an axis, and a bearing is disposed around the shaft. The commutator is connected to the shaft, and a first seal surrounds the commutator. The first seal substantially isolates the commutator assembly from the internal ambient atmosphere of the electric motor. Further, a second seal substantially isolates the shaft and the bearing from the commutator and the conductive brushes.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: July 9, 2002
    Assignee: McMillan Electric Company
    Inventor: Dewain L. Wasson
  • Publication number: 20020047453
    Abstract: When winding start S of a winding is entwined around a riser R1, the wire is wound via a riser R4 around a salient pole P1 adjacent to the riser R4 and an opposed salient pole P2 to the salient pole P1 in order and leads from a riser R3 through an opposed riser R6 to an adjacent salient pole P3 and an opposed salient pole P4. Next, it is passed to a riser R5 and is wound around an opposed riser R2, an adjacent salient pole P5, and a salient pole P6, then ends with the riser R4. A varistor 18 is inserted and three electrodes 19 are soldered to the corresponding risers R2, R4, and R6.
    Type: Application
    Filed: June 26, 2001
    Publication date: April 25, 2002
    Applicant: KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHO
    Inventors: Masayuki Katagiri, Hiromitsu Takei
  • Patent number: 6362555
    Abstract: When winding an armature coil, start S of a winding is entwined around a riser R1, the wire is wound via a riser R4 around a salient pole P1 adjacent to the riser R4 and an opposed salient pole P2 to the salient pole P1 in order, and leads from a riser R3 through an opposed riser R6 to an adjacent salient pole P3 and an opposed salient pole P4. Next, the wire is passed to a riser R5 and is wound around an opposed riser R2, an adjacent salient pole P5, and a salient pole P6, then ends with the riser R4. A varistor 18 is inserted and three electrodes 19 are soldered to the corresponding risers R2, R4, and R6.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: March 26, 2002
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Masayuki Katagiri, Hiromitsu Takei
  • Patent number: 6310418
    Abstract: In a large rotating electrical machine having a rotor comprising conductor bars of copper located in slots in a rotor core and connected together at their ends to form a winding, the conductor bars are electrically insulated from the rotor core by a coating on the conductors of a ceramic-based material. The coating serves to prevent sparking occurring between the conductor bars and the rotor core.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: October 30, 2001
    Assignee: Alstom UK Limited
    Inventors: Paul Eaton Clark, Roger Henry Regan
  • Patent number: 6285109
    Abstract: When winding an armature coil start S of a winding is entwined around a riser R1, the wire is wound via a riser R4 around a salient pole P1 adjacent to the riser R4 and an opposed salient pole P2 to the salient pole P1 in order and leads from a riser R3 through an opposed riser R6 to an adjacent salient pole P3 and an opposed salient pole P4. Next, it is passed to a riser R5 and is wound around an opposed riser R2, an adjacent salient pole P5, and a salient pole P6, then ends with the riser R4. A varistor 18 is inserted and three electrodes 19 are soldered to the corresponding risers R2, R4, and R6.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: September 4, 2001
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Masayuki Katagiri, Hiromitsu Takei
  • Patent number: 6285106
    Abstract: A commutator comprises a plurality of commutator segments on the outer circumferential surface and is connected at one end to an armature. At the other end, the commutator has an annular noise-preventing electric element, such as varistor, which has a plurality of connecting electrodes, each of which is electrically connected to each of the commutator segments via a short-circuit conductor, thereby avoiding soldering connection.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: September 4, 2001
    Assignee: Igarashi Electric Works Ltd.
    Inventor: Shigetaka Oki
  • Patent number: 6153960
    Abstract: When winding an armature coil start S of a winding is entwined around a riser R1, the wire is wound via a riser R4 around a salient pole P1 adjacent to the riser R4 and an opposed salient pole P2 to the salient pole P1 in order, and leads from a riser R3 through an opposed riser R6 to an adjacent salient pole P3 and an opposed salient pole P4. Next, it is passed to a riser R5 and is wound around an opposed riser R2, an adjacent salient pole P5, and a salient pole P6, then ends with the riser R4. A varistor 18 is inserted and three electrodes 19 are soldered to the corresponding risers R2, R4, and R6.
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: November 28, 2000
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Masayuki Katagiri, Hiromitsu Takei
  • Patent number: 6144133
    Abstract: A direct current electromotor, having in particular small dimensions, comprising a collector plate arranged on a shaft, a plurality of collector wires held by the collector plate plate and accumulated to a collector sleeve, and comprising a capacitor disk also arranged in the area of the collector plate, the contact pads of the capacitor disk are each in electrical connection to at least one associated collector wire in a respective coordination. A direct current motor of this kind shall have a more simple structure so that very small diameters can also be produced. This is achieved in that the capacitor disk with its contact pads is directly set onto the collector wires and is connected therewith.
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: November 7, 2000
    Assignee: Interelectric AG
    Inventors: Joachim Steffan, Hansruedi Wenger, Andre Halter
  • Patent number: 6114792
    Abstract: In order to reduce the wear on the brushes (6) and thus extend the operating lives of the brushes and of the commutator motor, brush sparking on the trailing edges (6.2) of the brushes (6) is reduced a commutation magnetic field (M), produced for example by an additional magnet (4) placed axially behind the brushes (6), such that the magnetic field (M) deflects the moving charge carriers in the brushes (6), to thereby reduce the current density at the trailing edges (6.2) of the brushes (6).
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: September 5, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventor: Peter Tiemeyer
  • Patent number: 6078117
    Abstract: An end cap assembly is configured as an electronic conducted noise filter and/or radiated field shield for incorporation as the end cap of a motor housing case as original equipment. The assembly includes a conductive panel having conductive members which interconnect discrete electrical components of a filter network array. Alternatively, various types of printed circuit boards, wireframe assemblies, wirewrap assemblies, and lead frame assemblies may be used. These assemblies include the conductive members which are held in position within an electrically insulative component member or housing of the end cap assembly by such means as insertion of tabs into captivating slots, insert overmolding, encapsulation, heat staking, mechanical., fasteners, and/or adhesives.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: June 20, 2000
    Assignee: Nartron Corporation
    Inventors: Randall L. Perrin, John M. Washeleski, Peter H. Strom
  • Patent number: 6057623
    Abstract: A dynamo-electric machine comprises an armature having a winding composed of a wire or wires wound by a lap winding method through slots extending in the axial direction formed on the outer circumferential surface of a core secured to a shaft, a commutator having commutator segments secured to the shaft, and an equalize disposed adjacent to the commutator in the direction of the axis of the commutator having terminals stacked in the axial direction which electrically connect commutator segments which should have the same electric potential.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: May 2, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshinori Tanaka, Ryuichi Ikeda, Kyouhei Yamamoto, Akihiro Daikoku
  • Patent number: 6037693
    Abstract: A commutator motor has at least two supply terminals; a metallic pole tube, and an interference suppressing device, the pole tube being formed as a part of the interference suppressing device.
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: March 14, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Detlef Marth, Johann Rothkopf, Luciano Zorzin, Wolfgang Pfaff, Dirk Arnold
  • Patent number: 5994815
    Abstract: An electric rotating machine has an armature coil comprising outer and inner coil trunks disposed in slots of an armature core as well as outer and inner coil arms disposed along an axial side surface of the armature core. The outer coil arms are arranged to operate as a commutator and in slidable contact with brushes. The diameters of the radially outermost parts of the outer coil arms and the brushes are larger than that of the radially outermost surface of the outer conductor. This arrangement assures a larger commutator-brush contact area that reduces current density as well as heat generation in the commutator-brush contact area. As the radially outwardly extending parts of the outer coil arms are exposed to the surrounding air, the outer coil trunk, the outer coil arm and the brushes as well as the radially outwardly extending part are cooled effectively during rotation of the armature core.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: November 30, 1999
    Assignee: Denso Corporation
    Inventors: Yoshito Takagi, Masami Niimi
  • Patent number: 5979087
    Abstract: An electromechanical machine includes a stator fixed with respect to a housing structure and a rotor fixed with respect to a driven shaft. The stator includes a magnetically permeable core having a plurality of parallel winding slots containing conductive windings. Coilheads are located at opposite axial ends of the magnetically permeable core where the windings turn to extend down a parallel winding slot. The motor is equipped with electrostatic shield arrangements in the winding slots and coilheads to reduce capacitive coupling between the stator and rotor during operation.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: November 9, 1999
    Assignee: Reliance Electric Industrial Company
    Inventors: Sidney Bell, Michael J. Melfi, Stanley E. Wallace
  • Patent number: 5949173
    Abstract: Disclosed is an improvement to the stability of D.C. motor brushes mounted in brush boxes with wings is improved by angling the wings toward the commutator such that the brush spring contacts the brush at one or more points intermediate the ends of the brush. Improved cooling is provided by utilizing an end plate with apertures and a brush plate which in combination with the commutator, provides a brush plate aperture for cooling air flow. In a preferred embodiment, speed variations of the motor can be achieved by selectively disconnecting one or more brushes in a four brush embodiment reducing the torque and rotating speed of the motor. In a preferred embodiment, the use of a diode to interconnect same polarity brushes permits a speed change to be accomplished by selectively connecting one or the other end of the diode.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: September 7, 1999
    Assignee: General Electric Company
    Inventors: Guillermo Wille, Donald B. Pedigo, Harald E. Blaettner, Bernd A. Wieland, Eldon R. Cunningham
  • Patent number: 5942827
    Abstract: The present invention refers to an electric motor comprising a stator with an internal permanent magnet and a tubular magnetic return sleeve surrounding said permanent magnet whereby an annular air gap is formed therebetween, said magnetic return sleeve being held at its axial and radial positions relative to said permanent magnet by a frame of plastic material injected around these two components and being connected to said permanent magnet by said plastic frame. The present invention aims at improving the manner in which the two structural components are attached to and positioned on one another.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: August 24, 1999
    Assignee: Interelectric AG
    Inventors: Frank Neumann, Joachim Steffan, Jurgen Mayer
  • Patent number: 5929579
    Abstract: A method and circuit is disclosed for soft-commutation of a direct current (DC) motor. An attenuation circuit is connected through auxiliary brushes A, A', B and B' to the commutator (16) to drain circuit from successive armature coils (15) before the main brushes (27, 28) disconnects from each of the coils (15). This prevents the spark generation that normally occurs in conventional DC motors. The attenuation circuit may also be connected before energization of the coil (15) for a soft turning on operation.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: July 27, 1999
    Assignee: Lockheed Martin Energy Research
    Inventor: John S. Hsu