Conversion Elements, (e.g., Transformers, Rectifiers, Etc.) Patents (Class 310/68D)
  • Patent number: 6166464
    Abstract: A power module for a motor in which the module is arranged to house both the high power devices needed to drive the phase windings of the motor and the control electronics needed to control the operation of the high power devices. The components are arranged such that the thermal energy generated by the high power devices is directed away from the control electronics for subsequent dissipation. An insulated metal substrate is used as the base of the module for directing the thermal energy. Further, the module components can be easily assembled through the use of solderless resilient connections from the control electronics to the other components in the module. The module employs a base, a power shell coupled to the base, and a circuit board positioned within the internal chamber of the power shell. The power shell has a plurality of walls forming an internal chamber and at least one conductive region. At least one electronic device is mounted to the conductive region.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: December 26, 2000
    Assignee: International Rectifier Corp.
    Inventor: William Grant
  • Patent number: 6160335
    Abstract: A vehicle AC generator includes a rectifier unit having plus cooling fin carrying a plurality of plus diodes, a minus cooling fin carrying a plurality of minus diodes, and a connection member disposed between the plus and minus cooling fins for insulating the two fins and connecting the plus and minus diodes. A plurality of U-shaped terminal members axially extend from the connection member which respectively guide the leads of the armature winding. Each of the terminal members has three longitudinal side walls forming generally rectangular cross-section, one end connected to the rectifier unit, the other end connected to one of the leads, and a heat-block portion having at least two of the side walls.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: December 12, 2000
    Assignee: Denso Corporation
    Inventors: Hiroshi Ishida, Akiya Shichijyo
  • Patent number: 6160333
    Abstract: The present invention relates to a replacement alternator constructed to replace an existing CS-130 alternator in a vehicle where the CS-130 alternator was disposed in a predetermined alternator space within the vehicle. The alternator space has a predetermined length, width and height. The alternator comprises a housing defining an alternator interior space. The housing is sized to fit within the predetermined alternator space. A rotor coil having a plurality of wire windings wound thereabout is disposed in the alternator interior space of the housing and rotatably supported by the housing. The wire windings of the rotor coil have an electrical current flowing therethrough for generating a rotating magnetic field as the rotor coil rotates. Means are provided for selectively rotating the rotor coil at a speed of at least 1600 revolutions per minute. The alternator includes a stator positioned in the rotating magnetic field generated by the rotor coil and supported by the housing.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: December 12, 2000
    Assignee: Unit Parts Company
    Inventors: Jianing Chen, Michael D. Ballard
  • Patent number: 6150741
    Abstract: In an alternating current generator for vehicles, an output terminal of a rectifier circuit is tightly fixed to a positive-polarity side heat radiation fin by tightening a nut. A resin bushing is fitted around the nut to insulate electrically the output terminal. The bushing has a flange on its outer peripheral surface. A rear cover made of resin is attached to cover the flange, so that the rear cover restrains the bushing from moving along and turning around the output terminal.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: November 21, 2000
    Assignee: Denso Corporation
    Inventors: Yoshinori Hayashi, Hitoshi Irie
  • Patent number: 6150196
    Abstract: First, a rectifier assembly is assembled from a negative heat sink assembly, a positive heat sink assembly, a circuit board assembly, and a guide. Subsequently, stator coil connecting terminals of the rectifier assembly are chucked by using a grounded chucking jig. Then, under this condition, powder coating charged with a plus polarity is sprayed to this rectifier assembly, and thus the sprayed powder coating is absorbed onto a surface of an exposed metal of the rectifier assembly by the electrostatic force. Thereafter, a heating process operation is carried out to heat/harden this powder coating, so that the insulating film is formed on the surface of the exposed metal of the rectifier assembly.
    Type: Grant
    Filed: August 20, 1998
    Date of Patent: November 21, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazunori Tanaka, Kyoko Higashino, Katsumi Adachi
  • Patent number: 6140722
    Abstract: An improved alternator system for replacing an OEM Ford IAR alternator system. The improved alternator system includes a rectifier with increased heat dissipation qualities and decreased heat generation qualities and configured to maintain secure electrical connections. The alternator system is further configured to provide optimum electrical output by providing the rotor and the stator with additional turns or windings of heavier gauge wire whereby the alternator is capable of inducing a stabilized output current of at least about 52 amperes of current at about 1600 revolutions per minute of the rotor.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: October 31, 2000
    Assignee: Unit Parts Company
    Inventors: Michael D. Ballard, Larry Joe Maddox
  • Patent number: 6121699
    Abstract: A motor vehicle AC generator including a rectifier in which a direct-fitting surface of a negative-polarity side cooling plate is brought closely into contact with a casing direct-fitting surface of a rear bracket and is fixedly tightened with a fitting screw with respect thereto. In addition, a silicone sheet is interposed between the cooling plate and the rear bracket in a state of being located within an intervening member accommodating groove made in the direct-fitting surface of the cooling plate so as to cover an area lying light under a diode except the peripheral bearing surface of the fitting screw.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: September 19, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshiaki Kashihara, Yoshihito Asao
  • Patent number: 6118203
    Abstract: An x-ray generating device having an improved high efficiency motor is disclosed. The x-ray generating device comprises a cathode assembly and an anode assembly arranged opposite each other in a vacuum vessel. According to the invention, the anode assembly is coupled and rotated by the rotor of a high efficiency motor which has near traditional gaps by positioning the motor stator assembly in close proximity to the rotor of the motor and applying a same potential to both the stator core and the rotor. The stator assembly further includes poly-phase stator winding coils arranged on the stator core. The coils are electrically insulated from the stator core, and they are supplied with poly-phase AC signals from a motor controller to induce magnetic interactions and rotate the rotor and the anode assembly.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: September 12, 2000
    Assignee: General Electric Company
    Inventor: Steven D. Hansen
  • Patent number: 6114783
    Abstract: A rectifier accommodating portion, a condenser accommodating portion, a regulator accommodating portion and a connector accommodating portion are recessed on the inner surface of a rear bracket, and baniers which constitute a cooling air passageway are integrally made to protrude axially from the surface of the inner wall of the rear bracket so as to separate between each accommodating portion. Further, intake openings and a connector receiving hole are provided through the rear bracket so as to communicate the rectifier accommodating portion, the regulator accommodating portion and the connector accommodating portion from the exterior while a plurality of exhaust openings are provided through the outer circumference in the circumferential direction.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: September 5, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Yoshihito Asao
  • Patent number: 6111390
    Abstract: A power device including a magneto and a rectification circuit for rectifying an output of the magneto is provided which is capable of adjusting an output of the magneto without any specific control circuit. A field adjusting excitation coil is arranged on a side of a stator of the magneto so as to generate a field adjusting magnetic flux when it is excited, resulting in a magnet field of the magneto being varied by means of the magnetic flux. The field adjusting excitation coil is connected to an intermediate portion of a current flow circuit for a load current, to thereby be excited by the load current, so that a magnet field of a rotor of the magneto is varied depending on the load current, leading to adjustment of an output of the magneto.
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: August 29, 2000
    Assignee: Kokusan Kenki Co., Ltd.
    Inventors: Yutaka Inaba, Tetsuya Kondo
  • Patent number: 6111330
    Abstract: An arrangement for the determination of the temperature of a direct-current motor. The temperature is determined in an indirect manner from the temperature-dependent armature resistance, with the armature resistance being determined as the quotient of the voltage being applied to and measured at the motor terminals and of the blocking current of the armature, and being set in relation to the respective temperature. The current signal determined from the current flowing within the armature is averaged with adjustable, calculated integration times with the aid of an integrator that can be controlled by a microcontroller. The arrangement, can be used for the indirect determination of the rpm rate (N) and/or variations that are critical or of interest in the rpm rate of the motor. The rpm rate is proportional to the voltage (U.sub.ind) induced within the armature, taking into consideration a motor-typical proportionality constant (.kappa.) according to equation N=.kappa. U.sub.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: August 29, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Gunnar Lochmahr, Volker Aab, Gerhard Knecht
  • Patent number: 6107710
    Abstract: Means are disclosed which allow certain automobile alternators to be converted so that their electrical hook ups are reverted to an older more efficacious terminal connection style thereby enabling the use of older alternator frames when rebuilding or remanufacturing these alternators. Essentially a bayonett style male/female connector assembly is replaced with a bolt and nut and eyelet style of connection means.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: August 22, 2000
    Inventor: Jose Gamboa
  • Patent number: 6107711
    Abstract: A rectifier assembly for use in a rotating electromagnetic machine includes an outer heat sink and an inner heat sink. The outer heat sink is configured to be connected with a diode wheel rim such that an air space is defined therebetween for cooling during rotation of the diode wheel rim. At least one rectifier element is disposed between and electrically connected with the outer heat sink and the inner heat sink. A block is disposed adjacent to the outer heat sink generally opposite the at least one rectifier element. A clamping bolt extending through the inner heat sink and the outer heat sink is threadingly engaged with the block. An electrically insulating tube is disposed around the clamping bolt. An elastomeric spacer is positioned around the clamping bolt on an end of the tube. The spacer is configured to accommodate axial stack-up tolerances of the rectifier assembly in an axial direction of the clamping bolt.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: August 22, 2000
    Assignee: Emerson Electric Co.
    Inventor: David T. Borchert
  • Patent number: 6100613
    Abstract: In this compact rectifier, a arcuate bodies of a positive heat sink and a arcuate body of a negative heat sink are arranged in a coaxial manner while positioning major surfaces thereof at the same plane position. A plurality of positive diodes are mounted on the major surface of the arcuate body of the positive heat sink along the circumferential direction in such a manner that leads are directed toward an outer circumferential side. On the other hand, while a plurality of negative diodes offset by a preselected amount along the circumferential direction with respect to the positive diodes with directing the lead to an inner circumferential side, these plural negative diodes are mounted on the major surface of the arcuate body of the negative heat sink.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: August 8, 2000
    Assignee: Mistubishi Denki Kabushiki Kaisha
    Inventors: Kazunori Tanaka, Katsumi Adachi
  • Patent number: 6094011
    Abstract: A discharge lamp lighting device driven by an internal combustion engine is disclosed which is capable of lighting a discharge lamp without using a ballast constituted by a leakage transformer. The device includes a generator which is driven by the internal combustion engine and of which output characteristics exhibit drooping characteristics, so that an output voltage of the generator may be applied to a discharge lamp without using any ballast. Output characteristics of the generator are so set that an output voltage of the generator at a non-load state thereof may be higher than a break-down voltage of the discharge lamp, a short-circuit current of the generator may have a level sufficient to restrict a discharge current of the discharge lamp just after starting of discharge thereof to an allowable level or below, and a voltage across the discharge lamp and a discharge current thereof at a steady state thereof each are kept within a rated range.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: July 25, 2000
    Assignee: Kokusan Denki Co., Ltd
    Inventor: Tooru Notsu
  • Patent number: 6084327
    Abstract: An internal vibrator for compacting concrete and having a vibrator housing in which is disposed an eccentric mass and an electric motor for driving the eccentric mass. The electric motor is supplied via a power supply cord with electric current having a frequency that is greater than line frequency. The vibrator comprises a switch for controlling the electric motor, and also includes a transformer for supplying to the electric motor the electric current having the frequency that is greater than line frequency. The switch and the transformer are combined in a common housing to form a miniaturized built-in unit on the power supply cord.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: July 4, 2000
    Assignee: Wacker Werke GmbH & Co. KG
    Inventor: Michael Steffen
  • Patent number: 6081054
    Abstract: An automotive alternator comprises a voltage regulator case molded from insulating resin in which a connector portion, a circuit housing portion for housing a circuit portion of a voltage regulator and a condenser housing portion are integrally formed, in which conductors are insert-molded to form connecting terminals for electric connection to the outside and internal wiring paths, and on which a heat sink for cooling the circuit portion of the voltage regulator is disposed so as to cover an opening of the circuit housing portion, the voltage regulator case being disposed on same plane as a rectifier which intersects the axial center of the shaft at a right angle so as to surround the shaft at one end of the shaft, wherein the connector portion, the circuit housing portion and the condenser housing portion of the voltage regulator case are arranged circumferentially such that the axial direction of the connector portion, the longitudinal direction of cooling fins of the heat sink and the longitudinal directi
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: June 27, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshiaki Kashihara, Yoshihito Asao
  • Patent number: 6060802
    Abstract: A cooling fin is fixed to a frame and mounts a plurality of rectifying elements. The cooling fin is configured into a circular ring shape separated at a cutout section. A brush holder, a connector casing and an IC regulator are disposed in this cutout section. A circumferential gap of the cutout section is smaller than three times a circumferential width of the brush container.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: May 9, 2000
    Assignee: Denso Corporation
    Inventors: Makoto Masegi, Tsutomu Shiga, Koichi Ihata
  • Patent number: 6057614
    Abstract: A device (1) for switching electromagnetic equipment. It is especially intended for switching a direct-current brake for a three-phase motor (3) with a switching contact (6) with a rectifier (7) with integrated protective circuitry downstream of the switching contact. There is current transformer (5) upstream of the switching contact. The transformer's primary winding is part of a conductor in the line that provides a voltage.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: May 2, 2000
    Assignee: Flender-Himmelwerk GmbH
    Inventors: Klaus Mayer, Ottmar Ziepel, Bernd Strauss
  • Patent number: 6034452
    Abstract: A rectifier arrangement of an alternator for a vehicle includes a frame and a cover for a rectifier. The rectifier arrangement is composed of a plus-potential cooling-fin disposed in a space between the cover and the frame at a portion close to the cover in parallel therewith, a minus-potential cooling-fin disposed in the space in parallel with the plus-potential cooling-fin, a fastening member fixed to the frame and extending through mounting holes of the plus-potential and minus-potential cooling fins, a cylindrical bushing made of thermosetting resin disposed in a space formed by the cover, plus-potential cooling-fin and fastening member.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: March 7, 2000
    Assignee: Denso Corporation
    Inventors: Shigenobu Nakamura, Tsutomu Shiga, Koichi Ihata
  • Patent number: 6031306
    Abstract: In an electric motor which includes an electronic control device and an armature within a closed motor casing, the electronic control device is arranged within the casing, in a position offset axially from but close to the armature. The motor includes a thermal screen which is interposed axially between the armature and the control device, and the screen includes means for dissipating heat outside the casing.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: February 29, 2000
    Assignee: Valeo Electronique
    Inventor: Alfred Permuy
  • Patent number: 6020660
    Abstract: A dynamoelectric machine includes a stator having a stator core. A winding is provided on the stator core and the stator core has a stator bore. A rotor including a rotor core is received in the stator bore. A permanent magnet is mounted on the rotor core periphery and a rotor shaft is mounted on the rotor core. Bearing means are provided for supporting the rotor shaft for rotation relative to the stator. A first circuit board having electrical components thereon is used in operating the dynamoelectric machine, and a second circuit board having an electrical component in the form of a sensing device thereon is used in determining the position of the rotor. The first circuit board is constructed for mounting the second circuit board thereon so that the second circuit board projects axially inwardly from the first circuit board and the sensing device is disposed in an axial position overlapping the axial position of the permanent magnet.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: February 1, 2000
    Assignee: General Electric Company
    Inventor: Kamron M. Wright
  • Patent number: 5998893
    Abstract: An integral heat sink and fan rectifier assembly comprises a disk fastened to a rotor of a synchronous motor or generator, the disk having a central bore, a plurality of fan blades disposed on the outer periphery and a circular array of recesses that receive insulation encapsulated rectifier units that are fastened to the disk and a have a heat transfer plates that engage the bottom of the recesses to transfer heat to the disk which conducts the transferred heat to the fan blades, which transfer the heat to the cooling air as rotor rotates and blows cooling air through a portion of the motor or generator.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: December 7, 1999
    Inventors: John T. Fowler, Darrell R. Morrison
  • Patent number: 5998891
    Abstract: The present invention relates to a replacement alternator constructed to replace an existing CS-130 alternator in a vehicle where the CS-130 alternator was disposed in a predetermined alternator space within the vehicle. The alternator space has a predetermined length, width and height. The alternator comprises a housing defining an alternator interior space. The housing is sized to fit within the predetermined alternator space. A rotor coil having a plurality of wire windings wound thereabout is disposed in the alternator interior space of the housing and rotatably supported by the housing. The wire windings of the rotor coil have an electrical current flowing therethrough for generating a rotating magnetic field as the rotor coil rotates. Means are provided for selectively rotating the rotor coil at a speed of at least 1600 revolutions per minute. The alternator includes a stator positioned in the rotating magnetic field generated by the rotor coil and supported by the housing.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: December 7, 1999
    Assignee: Unit Parts Company
    Inventors: Jianing Chen, Michael D. Ballard
  • Patent number: 5982062
    Abstract: The invention provides an alternator for motor vehicles, in particular having a dissipator with one or more orifices designed to receive one or more press-fit diodes. An adaptor generally in the form of a disk has an outline enabling it to be engaged as a press-fit in a respective orifice of the dissipator. The adaptor has at least one plane face enabling a solder-mounting diode to be soldered thereto. The invention also includes the adaptor itself.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: November 9, 1999
    Assignee: Valeo Equipements Electriques Moteur
    Inventor: Jean Gautier
  • Patent number: 5977669
    Abstract: A three-wave rectifying unit of an AC generator has a plus-side cooling fin, a minus-side cooling fin and a DC-output terminal. The DC-output terminal is made of a metal plate which is harder than the plus-side cooling fin to provide tight mechanical connection. The DC-output terminal, the plus-side cooling fin, a plus-side brush terminal and a plus-side terminal of a voltage regulator are fastened together and electrically connected by a screw which is screwed into a portion of the DC-output terminal.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: November 2, 1999
    Assignee: Denso Corporation
    Inventors: Ko Yoshida, Tamaki Suzuki, Yusuke Kawano
  • Patent number: 5955805
    Abstract: A liquid cooled alternator comprising a casing, one end of which is closed by a rear bearing which carries a rectifier bridge for rectifying the alternating current produced by the alternator, the bearing having an internal cavity in which a coolant liquid flows. The bearing is formed with at least one chimney element which is open axially at both axial ends of the bearing. These chimney elements extend through the internal cavity of the bearing, so that an outer face of a side wall of the chimney element is in contact with the coolant liquid flowing in the cavity. At least one component of the rectifier bridge is mounted within at least one corresponding chimney element.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: September 21, 1999
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Alain Chaudoreille, Michel Le Douarin
  • Patent number: 5949166
    Abstract: A larger-diameter fin is provided adjacent to a frame, while a smaller-diameter fin is provided adjacent to a protecting cover. The larger-diameter fin and the smaller-diameter fin are arranged parallel to each other in an axial direction with an intervening clearance so that their rectifying elements are disposed at opposite directions each other. The larger-diameter fin is offset outward in a radial direction. The smaller-diameter fin is offset inward in the radial direction. The protecting cover has an axial opening which introduces external air directly to the positive rectifying element. Furthermore, a radial ventilation passage is formed between the larger-diameter fin and the frame so as to pass the central position of the negative rectifying element. An opening, introducing external air directly, is formed at a radial-outer end of the radial ventilation passage.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: September 7, 1999
    Assignee: Denso Corporation
    Inventors: Tooru Ooiwa, Tsutomu Shiga, Koichi Ihata
  • Patent number: 5932942
    Abstract: An integral brushless DC motor and drive package is disclosed that includes the brushless DC motor and drive circuitry supported by one of the motor end caps. The drive circuitry includes power electronic devices for converting input power to pulsed power for the motor. The power switching components extend from a circuit board and are received within recesses of the end cap. The switching components are electrically insulated from the end cap, but are thermally conductive to the end cap within the recesses to dissipate heat during operation. The switching components are preferably disposed in radially equally spaced positions on the circuit board to provide even heat loading to the end cap.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: August 3, 1999
    Assignee: Reliance Electric Industrial Company
    Inventors: Guy J. Patyk, Curtis O. Olsen
  • Patent number: 5892308
    Abstract: An alternator for a motor vehicle has a rectifier bridge with positive diodes which are received in holes formed in a thermally conductive sector, which is fixed to an end plate of the alternator casing and which constitutes a thermal dissipator for the rectifier bridge. The rectifier bridge further includes a second sector of thermally conductive material, which is fixed to the first sector over the holes in the latter in which the positive diodes are received.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: April 6, 1999
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Roger Abadia, Jean-Marc Dubus, Jean Gautier, Daniel Richard, Georges Tranchon
  • Patent number: 5883450
    Abstract: An alternator, in particular for a motor vehicle, comprises half-shells to which stator windings are fixed and which rotatably receive a rotor shaft, and a rectifier circuit made up of power diodes each comprising body and a lead extending axially from said body. The bodies of some of the diodes are connected to ground while the bodies of the other diodes are connected to an output terminal of the alternator. The diode bodies are fixed on or in the back half-shell of the alternator on or in a dissipating support which is generally in the form of a plate that is insulated from the half-shell and that is outside it. According to the invention, the distance between the dissipating support and the back half-shell, and the positions of the said other diodes on the dissipating support are such that the leads of said other diodes project into openings formed in the back half-shell.
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: March 16, 1999
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Roger Abadia, Jean-Luc Tarrago
  • Patent number: 5866963
    Abstract: A bridge rectifier for an alternator comprises a first heat sink for being secured to a frame of an alternator; a second heat sink disposed on top of the first heat sink; an electrical insulator disposed between the first and second heat sinks; a first group of diodes operably secured to the first heat sink; a second group of diodes operably secured to the second heat sink; an insulating support operably secured to the second heat sink, the support including a plurality of legs adapted to be received in respective holes in the second heat sink; a plurality of screws adapted to be received axially by respective legs, the screws being adapted to expand the legs radially, thereby to lock the legs in respective holes; and a plurality of electrical connectors each being operably connected to a respective pair of diodes, each pair comprising a diode from the first group and a diode from the second group, each of the plurality of electrical connectors for being operably connected to the alternator, each of the plura
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: February 2, 1999
    Assignees: Renard Manufacturing Co., Inc., Kalem Technologies Corp.
    Inventors: Al Weiner, Jimmy Shih
  • Patent number: 5844339
    Abstract: An active magnetic bearing with auto position-detection includes first and second opposing electromagnets disposed on opposite sides of a ferromagnetic body (1) suspended without contract with the electromagnets. The bearing includes inductive type position detectors which are constituted directly by coils (11, 21) of the first and second electromagnets. A mechanism (14; 24) is provided for injecting a sinusoidal current I.sub.0 sin.omega.t of constant amplitude I.sub.0, of angular frequency .omega., and of identical phase, simultaneously to the inputs of power amplifiers (13, 23) powering the coils (11, 21) of the first and second opposing electromagnets in superposition with the main currents from the servo-control circuits (31, 32). Circuits (41 to 44) serve to extract the position information which determines the magnitude of the main current to be applied by the servo-control circuits (31, 32) to the power amplifiers (13, 23) directly from the voltages u.sub.1, u.sub.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: December 1, 1998
    Assignee: Societe de Mecanique Magnetique
    Inventors: Ulrich Schroeder, Maurice Brunet
  • Patent number: 5838544
    Abstract: A heat dissipating structure for rectifiers of car alternators includes an upper cover, a rectifier assembly disposed under the upper cover, and a heat dissipating plate disposed below the rectifier assembly. The rectifier assembly is comprised of a plurality of rectifying elements and terminals, and a heat conductive assembly for receiving the rectifying elements. One side of the respective rectifying elements are connected to the terminals to constitute a rectifier circuit. The other side of the respective rectifying elements are connected to the heat conductive assembly, which is in turn connected to the heat dissipating plate. The heat conductive assembly is comprised of a heat conductive plate to which the rectifying elements may adhere, and a ceramic heat dissipating substrate disposed between the heat conductive plate and the heat dissipating plate.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: November 17, 1998
    Assignee: Mobiletron Electronics Co., Ltd.
    Inventor: Chen-Ku Wei
  • Patent number: 5828146
    Abstract: Apparatus for the bidirectional transfer of information comprises in each case: at least one rotating component (1); a further component (2); receivers (4, 5) on the respective components (1, 2), said receivers facing one another in groups on the axis of rotation (6) of the rotating component (1); and transmitters (7, 8) fitted on the components (1, 2) eccentrically with regard to the axis of rotation and directed towards the corresponding receivers (4, 5).
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: October 27, 1998
    Assignee: BFI Betriebstechnik GmbH
    Inventors: Gerhard Lorenz, Ernst Luhn, Lothar Zell
  • Patent number: 5828564
    Abstract: A rectifier excellent in terms of heat sink performance, product quality, and cost including a one-way conducting device for rectifying an alternating current, wherein the one-way conducting device includes a metal base serving as one electrode and having a side surface portion and a seating surface portion; and a metal heat dissipation member, including a socket section for receiving the metal base, for dissipating heat generated at the one-way conductive device, wherein the socket section of the metal heat dissipation member has a side wall portion firmly engaged with the side surface portion of the metal base and a bottom portion in contact with the seating surface portion of the metal base.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: October 27, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masakazu Mori, Shiro Iwatani, Shinji Iwamoto
  • Patent number: 5825108
    Abstract: The motor comprises a rotor (30) fixed for rotation with a shaft (36) of a member to be driven and a crown-like stator (10) obtained by blanking a lamination stack (12) provided with coil supporting teeth (11). Within the stator crown (10) there are obtained by blanking the lamination stack (12) a plurality of receptacles (13, 15, 17) for seating electric and electronic components associated with the stator. The components comprise a transformer (24), an inductance coil (25), and a plurality of MOSs (23). The stator crown (10) is co-molded with a covering of electrically insulating plastic material to cover the receptacles (13, 15, 17) and the teeth (11) and form a tank (22) for receiving a printed circuit (21). The permanent magnet rotor is fitted with stacks of small pieces (19) obtained by blanking lamination portions within the stator crown (10). The stacks of small pieces face the magnets (31) so as to close the respective magnetic circuits.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: October 20, 1998
    Assignee: Bitron S.p.A.
    Inventor: Pietro De Filippis
  • Patent number: 5821674
    Abstract: A rectifier device comprises a heat conductive housing including a plurality of cooling fins; a plurality of diodes disposed within the housing and thermally connected thereto such that heat generated by the diodes during operation is transferred to the housing; input connector operably connected to the diodes; and output connector one end of which is operably connected to the diodes and the other end of which is adapted for hard-wire connection to a load.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: October 13, 1998
    Inventor: Al Weiner
  • Patent number: 5812388
    Abstract: An improved bridge rectifier for an alternating current generator includes a first heat sink having a first diode, and an insulating layer disposed on the first heat sink. In addition, the improved bridge rectifier includes a second heat sink disposed on the insulating layer. The second heat sink includes a base section including first and second areas, a second diode, and a diode receiving holes in the base section and receiving the second diode therein. The second heat sink also includes a plateau section disposed on the first area of the base section, and air passages disposed in and extending through the base and plateau sections. The improved bridge rectifier further includes connectors, connecting the first heat sink and the second heat sink together with the insulating layer disposed therebetween, a cover connected to the base section and covering the second area of the base section, and a capacitor connected to the cover and to the second heat sink.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: September 22, 1998
    Assignee: Integral Automotive S.A.
    Inventors: Zvi Keidar, Eugen Popa
  • Patent number: 5798586
    Abstract: A liquid cooled a.c. generator whose cooling-fluid passage is formed with a thermoconductive tube in order to offer not only excellent watertight reliability but also greater cooling efficiency. In other words, a cooling-fluid passage for use in cooling any part to be liquid-cooled is formed with a good thermoconductive tube.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: August 25, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Katsumi Adachi
  • Patent number: 5796196
    Abstract: An adaptable rotating rectifier and suppression resistor assembly is designed to fit and mate with state-of-the-art, two-pole generators with maximum flexibility to accept a variety of known possible diode configurations and a relatively large suppression resistor in a cost effective manner. A tubular housing of the assembly has an axially extending internal cavity with a plurality of bus bars arranged in fixed, spaced relation in a radially outer portion of the internal cavity so as to extend axially along the internal cavity. A plurality of diodes of any one of at least three significantly different configuration diodes and a suppression resistor are arranged in line along the axis of the internal cavity with radially outwardly extending spring contact plates electrically connecting the diodes and suppression resistor with the bus bars. A desired preload force is provided on these components between an end cap at one end of the housing and a retainer at the other.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: August 18, 1998
    Assignee: Sundstrand Corporation
    Inventors: Tyrone Arthur Johnsen, Todd Alan Spierling, Harry Raymond Carter, Jr.
  • Patent number: 5780953
    Abstract: In an on-vehicle alternator, both the magnetic flux variation frequency and maximum flux density are decreased sufficiently to thereby decrease the internal iron loss and thereby realize an increase in the current generation efficiency. The on-vehicle alternator comprises a rotor wherein magnetic pole cores that are polarized by a rotor coil to alternately different polarities are circumferentially disposed on the outer periphery thereof at prescribed equi-angular intervals. A permanent magnet which is embedded within a resin-made retainer body is provided between the magnetic pole cores and has side faces, as viewed circumferentially, which are polarized respectively to the same polarities as those of adjacent respective magnetic pole cores to thereby vary the magnetic flux quantity directed toward stator coils so as to exhibit a circumferential gentle curve.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: July 14, 1998
    Assignee: Nippondenso Co., Ltd.
    Inventors: Atsushi Umeda, Norihito Tokura, Hirohide Sato, Makoto Taniguchi, Shin Kusase
  • Patent number: 5777407
    Abstract: A rectifying unit is disposed axially adjacent to a rear cooling fan. The rectifying unit has a plus-pole heat dissipating fin and a minus-pole heat dissipating fin integrally connected by a terminal plate. The plus-pole heat dissipating fin has an elongation extending axially around the rear cooling fan to have direct cooling air from the fan. The minus-pole heat dissipating fin is fixed to the housing directly or via a heat conductive material to be electrically grounded. Slits are formed on the elongations of the plus-pole heat dissipating fin to have discharging cooling air therethrough. Further, elongations are formed on the both dissipating fins at their inner periphery proximate to an intake window of the housing. Thus, cooling capacity of the rectifying unit is enhanced.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: July 7, 1998
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroshi Ishida, Tooru Ooiwa
  • Patent number: 5773903
    Abstract: The invention is a rectifier assembly (10) having reduced mass and high rigidity permitting operation at high rotational speeds. The rotating rectifier includes a rotator shaft assembly (12), a first conductive diode carrier (18), a second conductive diode carrier (20), first and second electrical conductors (40 and 44) connected to the first and second diode carriers and to one end of the rectifier assembly to provide a first DC output and a second DC output and first, second and third diode groups (37, 37', 37"). Each conductive diode carrier has an inner annulus (24) including first, second and third diode receiving surfaces (26, 28 and 30) disposed at spaced apart locations on the inner annulus of the diode carrier and an outer periphery which engages an inner annulus of the rotor shaft assembly. Each diode group comprises at least two diodes (38).
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 30, 1998
    Assignee: Sundstrand Corporation
    Inventors: Jack L. McCabria, Richard J. Nisonger
  • Patent number: 5770902
    Abstract: A motor termination board is disclosed for facilitating interconnection of control components and power components in a Brushless DC motor. The motor termination board includes a first stamping having a plurality of conductive paths, where the first stamping includes a plurality of connection points for receiving leads from control components and a plurality of control terminals for connecting the motor termination board to an electronic control of the motor. A second stamping is positioned adjacent the first conductive stamping and also has a plurality of conductive paths, where the second stamping includes a plurality of connection points for receiving leads from windings of the motor and a plurality of power terminals for connecting the motor termination board to a power supply for the motor. A termination board housing is provided for encapsulating the conductive paths of the first and second stampings and includes a first socket around the control terminals and a second socket around the power terminals.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: June 23, 1998
    Assignee: Globe Motors
    Inventors: L. Jay Batten, Dennis L. Queary
  • Patent number: 5757096
    Abstract: A device having a plurality of heat dissipation fins providing improved cooling to an alternator rectifier. The device may be removably attached to the alternator rear housing proximate the location of the rectifier. The device may also be incorporated as an integral part of the alternator rear housing. The device provides improved cooling to the alternator by increasing the surface area of the alternator rear housing at the area of the housing heated by the rectifier.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: May 26, 1998
    Inventors: Randy P. DuBois, David M. DuBois
  • Patent number: 5737210
    Abstract: A rectifier module assembly for a conventional three phase AC generator is formed into two crescent shaped rectifier modules so that the rectifier assembly can be mounted directly to the housing of the exciter rotor. The positive and negative rectifier modules are thermally conductive so that the exciter rotor itself can act as a heat sink for the rectifier module assembly. The rectifier module assembly occupies the space between and around the generator shaft and the exciter rotor windings.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: April 7, 1998
    Assignee: MagneTek, Inc.
    Inventor: Manoj M. Barahia
  • Patent number: 5729063
    Abstract: A vehicle AC generator having a rotor located with in a main unit of the generator and journaled at a rotary shaft includes a rectifier unit 21, including a plurality of diodes, a circuit board, and positive-electrode and negative-electrode side cooling plates, for rectifying an AC current. A rear bracket covers at least one of the cooling plates. Preferably, the diodes are soldered to the cooling plates, which are formed in an arcuate-belt shape. Diode leads oppose each other diametrically; connection terminals of the circuit board are collectively spot-welded. The cooling plate is provided with radial cooling fins, allowing air to flow smoothly and, thus, cooling at a relatively high efficiency. The rectifier unit is mounted in the rear bracket, the cooling plate is directly connected to the bracket, and its heat is radiated therefrom. The diodes are arranged such that they overlap diametrically in the generator, allowing its axial length to be reduced.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: March 17, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsumi Adachi, Kazunori Tanaka, Kyoko Kurusu
  • Patent number: 5723936
    Abstract: A battery isolator alternator bracket incorporating one or more heat sinks comprising at least one heat sink, the bracket formed of two segments, an upper closure segment, and lower base segment, the heat sinks formed preferably of extruded aluminum are shaped to conform to the interior of the bracket, each heat sink including a finned heat exchanger, having a terminal connecting at its front, being in electrical contact with a button diode, adhered thereto, with the terminals of each heat sink connecting either directly or by cable to the battery post of the alternator, for transmission of charge to the various batteries during alternator electrical generation.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: March 3, 1998
    Assignee: Wagner Product Co.
    Inventor: Thomas E. Wagner
  • Patent number: 5712517
    Abstract: A resinous coating applied to the heat sink portion of an alternator housing provides a low cost method for insulating a portion of the rectifier assembly from the housing and for insulating the stator winding lead wires that are routed through coated heat sink ventilation windows.
    Type: Grant
    Filed: September 15, 1992
    Date of Patent: January 27, 1998
    Assignee: Ford Motor Company
    Inventors: Eric Alexander Schmidt, Jeffrey Wayne Riedel