Different Voltages Patents (Class 318/108)
  • Patent number: 10807473
    Abstract: An on-board network for a motor vehicle, having at least one energy storage system for the intermediate storage of electrical energy and an electrical power network, which has at least one energy-consuming device that can be operated with electrical energy from the energy storage system and at least one charging device for charging the energy storage system, wherein the energy storage system is electrically connected to the electrical power network by way of at least one contactor. In this case, it is provided that the energy-consuming device is present in a first electrical power sub-network of the electrical power network and the charging device is present in a second electrical power sub-network of the electrical power network.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: October 20, 2020
    Assignee: AUDI AG
    Inventor: Roman Strasser
  • Patent number: 10787088
    Abstract: The vehicle electrical system described includes an inverter, an electrical energy store, an electrical machine and a DC transmission terminal. The inverter is connected to the energy store via input current terminals. At least two phase current terminals of the inverter are connected to the electrical machine. The inverter has at least two H-bridges. The DC transmission terminal has a positive rail connected to at least one of the phase current terminals.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: September 29, 2020
    Assignee: VITESCO TECHNOLOGIES GMBH
    Inventors: Martin Brüll, Martin Ehrmann, Hans-Peter Feustel, Franz Pfeilschifter, Matthias Töns
  • Patent number: 10637251
    Abstract: invention describes a modular energy storage direct converter system (10) which comprises the following: a control device (20) and at least one bridge branch (12) which comprises The a plurality of modules (14) which are connected in series, wherein each of said modules (14) comprises a storage element for electrical energy, in particular a battery, or an energy conversion element. Said modules (14) are designed and can be actuated such that the storage element or energy conversion element of a module can be selectively deactivated, and that the storage elements or energy conversion elements of two modules, which are separated by at least one intermediate module with a deactivated storage element/energy conversion element, can be connected selectively in parallel and in series.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: April 28, 2020
    Assignee: Universitaet der Bundeswehr Muenchen
    Inventors: Florian Helling, Thomas Weyh
  • Patent number: 10396681
    Abstract: A device, method, and non-transitory computer readable medium that determines a multilevel inverter circuitry comprising Nsource DC voltage sources and at least 2Nsource+5 controlled switching devices. The number of output voltage levels and the maximum output voltage of the multilevel inverter circuitry can be variable and depend on a trade-off among voltage rating of switches, variety of DC sources, and control strategy. A hybrid modulation scheme is employed to reduce the total harmonic distortions.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: August 27, 2019
    Assignee: King Abdulaziz University
    Inventors: Hussain M. Bassi, Muhyaddin J. Rawa
  • Patent number: 10158316
    Abstract: A motor control apparatus includes an AC-DC converter, an auxiliary power source, and an inverter. The AC-DC converter converts AC power into DC power and feeds the DC power to a DC bus bar. DC power is fed from the auxiliary power source to the DC bus bar and from the DC bus bar to the auxiliary power source. The inverter converts the DC power of the DC bus bar into the AC power and feeds the AC power to a motor. The auxiliary power source includes a capacitor, a DC-DC converter, and circuitry. The DC-DC converter performs conversion between a first DC voltage of the DC bus bar and a second DC voltage applied between both terminals of the capacitor or inside of the capacitor. The circuitry is configured to control the DC-DC converter to maintain positive correlation between the second DC voltage and the first DC voltage.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: December 18, 2018
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Mitsujiro Sawamura, Yasuhiko Kaku
  • Patent number: 10141866
    Abstract: Various examples are directed to systems and methods for a multi-level inverter to convert direct current (DC) to alternating current (AC). The inverter may comprise first, second and third capacitors electrically coupled in series between a positive DC rail and a negative DC rail. A first pole switch bank of the inverter may comprise a plurality of first pole switches. A first pole may be electrically coupled to the first pole switch bank.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: November 27, 2018
    Assignee: THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE
    Inventor: Madhav Manjrekar
  • Patent number: 10110155
    Abstract: A motor control apparatus includes an AC-DC converter, an auxiliary power source, and an inverter. The AC-DC converter converts AC power into DC power and feeds the DC power to a DC bus bar. DC power is fed from the auxiliary power source to the DC bus bar and from the DC bus bar to the auxiliary power source. The inverter converts the DC power of the DC bus bar into the AC power and feeds the AC power to a motor. The auxiliary power source includes a capacitor, a DC-DC converter, and circuitry. The DC-DC converter performs conversion between a first DC voltage of the DC bus bar and a second DC voltage applied between both terminals of the capacitor or inside of the capacitor. The circuitry is configured to control the DC-DC converter to maintain positive correlation between the second DC voltage and the first DC voltage.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: October 23, 2018
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Mitsujiro Sawamura, Yasuhiko Kaku
  • Patent number: 9973108
    Abstract: Hybrid modulation strategies are provided for single phase and three phase inverter topologies. According to hybrid modulation strategy embodiments, one line frequency period is divided into two operation modes based on the polarities of output voltage and output current. When polarities of the output voltage and output current are the same, a nominal voltage level modulation is used to generate the output voltage. When polarities of the output voltage and output current are opposite, a lower voltage level modulation is used to generate the output voltage. In one embodiment, a nominal voltage level modulation is five voltage level modulation, and a lower voltage level modulation is three or two voltage level modulation. Embodiments allow inverters to be constructed with fewer switches, and improve performance of multilevel inverters. The hybrid modulation strategies may be implemented in multilevel inverters such as active neutral point clamped (ANPC) and neutral point clamped (NPC) inverters.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: May 15, 2018
    Inventors: Hongliang Wang, Yan-Fei Liu
  • Patent number: 9866138
    Abstract: A voltage source converter of the controlled transition bridge type, having three phase limbs, each phase limb having a high &de director switch (Sw1 Sw3, Sw5) and a low side director switch (Sw4, Sw6, Sw2) connecting a respective DC terminal (DC+, DC?) to an AC node for that phase limb. Chain-link circuits for each phase limb comprise a plurality of series connect cells, each cell having an energy storage element that can be selectively connected in series or bypassed. The chain-link circuits are operated in a voltage mode to provide a defined voltage transition at the AC node during a transition between one director switch being turned off and the other director switch being turned on. Chain-link circuits are connected to a common node such that, in use, a current can flow from one phase limb to another via the respective chain-link circuits.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: January 9, 2018
    Assignee: GENERAL ELECTRIC COMPANY GMBH
    Inventors: Colin Donald Murray Oates, Kevin Dyke, David Reginald Trainer
  • Patent number: 9327604
    Abstract: According to one embodiment, an electric vehicle control apparatus is provided with a converter having a diode and a switching device which convert an AC voltage or a DC voltage supplied from an input side into a DC voltage, whose output side is connected to a main motor through an inverter, a battery connected to the converter through a reactor, to provide a power source for the main motor, and a boosting chopper circuit composed the diode and the switching device which the converter has, so as to boost a voltage of the battery.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: May 3, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinichi Toda, Ikuo Yasuoka, Kazuaki Yuuki, Yasufumi Mochizuki
  • Patent number: 8427083
    Abstract: A four-stage power distribution system (100) includes (i) a first stage (110) having an inverter (112) that provides power to a frequency drive (114) and an electric motor (116) controlled by the frequency drive; (ii) a second stage (120) having a flywheel (122) driven by the motor; (iii) a third stage (130) having an alternator (132) driven by the motor (116) and connected to the flywheel, and a rectifier (134) that receives current from the alternator and generates a direct current; and (iv) a fourth stage (140) having a charge control switch (142) that receives power from the rectifier, and a plurality of power storage devices such as batteries (144A-144C). A master control switch (150) controls the charge control switch to transition the plurality of batteries individually between a charging configuration and a load configuration. One or more of the battery(ies) in the load configuration provides power to the inverter.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: April 23, 2013
    Assignee: Momentum Power, Inc.
    Inventor: David E. Warmenhoven
  • Patent number: 8342812
    Abstract: A variable speed air compressing system includes a compressor, a motor configured to actuate the compressor, and a rectifier configured to receive alternating current from a first power source and to provide rectified direct current having a first voltage. The system also includes an inverter configured to receive the rectified direct current and to receive direct current from a second power source having a second voltage. The inverter is configured to provide alternating current to the motor. The alternating current provided to the motor is based on the rectified direct current if the first voltage is greater than the second voltage and the alternating current is based on the direct current from the second power source if the second voltage is greater than the first voltage.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: January 1, 2013
    Assignee: Crosspoint Solutions, LLC
    Inventor: Gerald Allen Alston
  • Patent number: 8220572
    Abstract: Various control options are applied for selecting the number of operating power sources for a multi-power source vehicle having a number of prime power sources and, optionally including energy storage systems. This system and method are applicable to large vehicles such as locomotives, mining trucks, tugboats and large cranes. Selectable operating modes are provided for different locomotive speed ranges and work loads. The system and method are based on a common DC bus electrical architecture so that prime power sources need not be synchronized. Multiple-engine locomotives are included in which the engine systems may be electrically connected in parallel or in series or in combinations of parallel and series to a DC bus.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: July 17, 2012
    Assignee: Railpower, LLC
    Inventor: Frank Wegner Donnelly
  • Patent number: 8076873
    Abstract: Hybrid power equipment comprising a user-selectable power selection switch for switching between DC or AC power, a boost and conserve feature for increasing speed of the working elements as necessary, and a motor or a plurality of motors for moving working elements. Running the OPE at the conserve setting prolongs battery pack duration per charge. The motor may comprise a dual coil commutator configuration. Power supply and control systems allow the user to select operation of the plurality motors or dual coil commutators in either series or parallel configuration depending on the power source.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: December 13, 2011
    Assignee: MTD Products Inc
    Inventors: Delbert E. Lucas, Justin Lucas, Ryan J. Lucas
  • Patent number: 7986114
    Abstract: A motor driver comprises a first power supply, a second power supply, a multiplexer, and an output power module. The first power supply provides a first power signal after a first period. The second power supply provides a second power signal after a second period, where the second period is longer than the first period. The multiplexer initially selects the first power signal and then selects the second power signal. An output power module controls a motor and receives power from an output of the multiplexer.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 26, 2011
    Assignee: Marvell International Ltd.
    Inventors: Ying Tian Li, Vishnu Kumar
  • Patent number: 7982426
    Abstract: An electric power system comprises an AC motor, a first DC voltage unit, an inverter as a power converter, being connected between the AC motor and first DC voltage unit, for exchanging power between these two components; and a controlled DC power supply which is connected between an arbitrary spot of a coil of the AC motor and a positive or negative electrode of the first DC voltage unit and which connects at least one semiconductor switching element and a battery as a second DC voltage unit in series.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: July 19, 2011
    Assignees: National University Corporation, Nagaoka University of Technology, Fuji Electric Holdings Co., Ltd.
    Inventors: Junichi Itoh, Akio Toba, Kouetsu Fujita
  • Patent number: 7952306
    Abstract: A method of operating a power system is provided. The method may include running one or more of a plurality of generator units that each include a power source, a first electric generator, and a second electric generator. Additionally, the method may include supplying electricity from one or more of the first electric generators of the one or more running generator units to a first set of one or more electric power loads. The method may also include supplying electricity from one or more of the second electric generators of the one or more running generator units to a second set of one or more electric power loads.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: May 31, 2011
    Assignee: Progress Rail Services Corp
    Inventors: Jeffrey Holt Wright, Roy Christopher Fonseca
  • Patent number: 7750584
    Abstract: A motor driver comprises a first power supply, a second power supply, a multiplexer, and an output power module. The first power supply provides a first power signal after a first period. The second power supply provides a second power signal after a second period, where the second period is longer than the first period. The multiplexer initially selects the first power signal and then selects the second power signal. An output power module controls a motor and receives power from an output of the multiplexer.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: July 6, 2010
    Assignee: Marvell International Ltd.
    Inventors: Ying Tian Li, Vishnu Kumar
  • Patent number: 7737590
    Abstract: Problem of the present invention is to enable elimination or reduction of a signal wire in a dedicated cable for a magnetic bearing device for supplied an electric power from a control device to a magnetic bearing main unit via the dedicated cable. A magnetic bearing device 100 according to the present invention has a magnetic bearing main unit 10 having an electromagnet 12M for magnetically levitating and rotatably supporting a magnetic rotating body 11 and functioning as a magnetic bearing, a control device 20 having a compensating circuit 25 for generating a control signal for controlling a levitation position of the magnetic rotating body 11, and an electricity supply line 30L for supplying an electric power from the control device 20 to the magnetic bearing main unit 10.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: June 15, 2010
    Assignee: Ebara Corporation
    Inventor: Atsushi Oyama
  • Patent number: 7692414
    Abstract: The present invention provides for a static excitation system for a superconducting rotor that comprises multiple brushes (12) in contact with the superconducting rotor winding (6), normally via collector rings and field leads. A power conditioning device (16) is connected to the brushes (12), and an energy storage device (18) is linked to the power conditioning device (16). The power conditioning device provides power from the energy storage device to the superconducting rotor when required, and when power to the superconducting rotor is not required, the power conditioning device takes excess power from the superconducting rotor and stores it in the energy storage device.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: April 6, 2010
    Assignee: Siemens Energy, Inc.
    Inventor: Robert J. Nelson
  • Patent number: 7525264
    Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may include receiving shunt current in one or more conductors according to a sensed component of power distributed by the conductors through one or more transformers coupled to the conductors and determined by an inductance associated with the transformers and a capacitance associated with the conductors.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: April 28, 2009
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Carl Dodge
  • Patent number: 7436148
    Abstract: A method of determining voltage conditions of a fuel cell vehicle which includes a motor as a driving force source of the vehicle, a motor control device for controlling operation of the motor, a fuel cell, to which a reaction gas is supplied, for generating electric power by an electrochemical reaction, and a battery device which is charged by the electric power generated by the fuel cell and sends and receives electrical energy to and from the motor by control of the motor control device. The method includes setting a voltage value, typically an average value, of an output voltage of the fuel cell within a range from a minimum value to a maximum value of an open circuit voltage of the battery device. Even when the fuel cell and the battery device are directly connected, overcharge or overdischarge can be prevented, thereby reducing frequency of voltage conversion.
    Type: Grant
    Filed: June 1, 2005
    Date of Patent: October 14, 2008
    Inventors: Hibiki Saeki, Satoshi Aoyagi
  • Patent number: 7411362
    Abstract: A control device of a motor-driven 4WD vehicle includes: a 42V alternator 2 driven by an engine 1 to generate 3-phase AC electricity of 42 volts; a rectifying circuit 14 which rectifies the 3-phase AC electricity generated by the 42V alternator 2 and which supplies DC electricity after rectification to a motor M1 which drives rear wheels; an inverter 3 which lowers the electricity generated by the 42V alternator 2 into 14 volts and which converts the lowered AC electricity into DC electricity; and a 14V battery E1 which is supplied with the electricity obtained by the inverter 3 and which is charged. With this configuration, a generator can function as both a motor generator for charging the 14V battery E1 and a motor generator for generating driving electricity of the motor M1, and the configuration of the device can be simplified.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: August 12, 2008
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Yasuki Ishikawa
  • Publication number: 20080054827
    Abstract: A system comprising at least one flywheel, a first motor, a dynamo, and a second motor. The first motor may consuming electrical power and urging rotation of the flywheel. The dynamo may use rotational energy received from the flywheel to generate electrical power. The second motor may consuming at least a portion of the electrical power generated by the dynamo. Also, the second motor may have a rating corresponding to a maximum consumption of electrical power that is more than double the maximum consumption of electrical power of the first motor.
    Type: Application
    Filed: August 27, 2007
    Publication date: March 6, 2008
    Inventors: Derek States, David States
  • Patent number: 7304445
    Abstract: The present invention is directed to a power control architecture for a vehicle, particularly a locomotive, in which a number of energy sources are connected to a common electrical bus and selectively provide energy to the bus based on the relationship between their respective output voltages and the bus voltage.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: December 4, 2007
    Assignee: Railpower Technologies Corp.
    Inventor: Frank Wegner Donnelly
  • Patent number: 7183728
    Abstract: A motor drive system includes a multi-output dc power source providing three or more output potentials, and a switching circuit including switching devices connected, respectively, with the output potentials of the multi-output power source. A controller determines a command apply voltage representing a desired voltage to be applied to the motor, and further determines a plurality of command share voltages corresponding to supply voltages of the multi-output dc power source, from the command apply voltage. The controller produces a pulsed voltage by driving the switching devices in accordance with the command share voltages.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: February 27, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yasuhiko Kitajima, Kantaro Yoshimoto
  • Patent number: 7119504
    Abstract: A protective circuit, for reducing electrical disturbances or interference during operation of a DC motor, features a series transistor (62) arranged in a supply lead from a DC voltage source (12) to a DC motor; an auxiliary voltage source (52), associated with that series transistor, having a substantially constant auxiliary voltage which is configured to make the series transistor (62) fully conductive when a supply voltage furnished by the DC voltage source is substantially free of electrical interference; and an analyzer circuit (32, 34, 36) for analyzing the supply voltage, which analyzer circuit is configured, upon the occurrence of electrical interference in the supply voltage, to increase the resistance of the series transistor (62) correspondingly, in order to reduce the influence of that electrical interference on the operation of the DC motor.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: October 10, 2006
    Inventor: Konstantin Dornhof
  • Patent number: 7116066
    Abstract: A power control system (12) for an electric motor having at least one magnetic bearing includes a DC/DC converter (18) supplied from a DC link bus (179) connected to a main power supply (14), the bus (17) supplying power for the electric motor and for a bearing actuator the converter (18) provides low voltage DC power supplies for a motor controller (23), a bearing controller (24) and a supervisory controller (26), the later monitoring the main power supply and communicating with the motor controller (23) and bearing controller (24) so as to cause the motor to operate as a generator in the event of a failure of the main power supply (14) to thereby supply power to the DC link bus (17) to maintain operation of the magnetic bearing. Circuit switching components are connected to the motor winding and selectively switched in a manner causing current generated in the motor winding to flow in one direction into the DC link bus (17) only while the winding voltage is greater than that of the DC link bus (17).
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: October 3, 2006
    Assignee: Turbocor, Inc.
    Inventor: Huai Yu Lin
  • Patent number: 7102304
    Abstract: The invention relates to a control device for a reversible, multi-phased rotating electrical machine which can operate in alternator or motor mode. The inventive device comprises a main battery (4), an electric network (5) and a unit (3) for controlling and commanding an inverter and a rectifier bridge (P) for selection in alternator mode or starter mode. According to the invention, the machine is powered by the inverter which is connected to a start-up control unit which can provide a voltage greater than that provided by the main battery (4) over the network (5). The inverter is connected to the positive terminal of the secondary voltage source via a first switch (K1) in motor mode, while the rectifier bridge (P) is connected to the positive terminal of the main battery via a second switch (K2) in alternator mode.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: September 5, 2006
    Assignee: Valeo Equipements Electriques Moteur
    Inventors: Dominique Sebille, Eckart Westerholt
  • Patent number: 7045979
    Abstract: An electric machine assembly having an electric machine. The electric machine can include a first speed circuit and a second speed circuit. In some constructions, both speed circuits can be of a permanent split capacitor design. At least one of the speed circuits can include a switch that is controlled by the controller to limit current through an auxiliary circuit of the unused speed circuit when certain conditions exist.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: May 16, 2006
    Assignee: A.O. Smith Corporation
    Inventors: William Louis Mehlhorn, William James Watkins, Jevon Darvell Reynolds
  • Patent number: 6930460
    Abstract: In a load driving arrangement, electric power is supplied from an auxiliary battery to a main power supply when the power stored by charging in the main power supply is scarce at the startup of the system. The power is supplied to the main power supply by closing relays to connect the auxiliary battery to the neutral point of an auxiliary motor, operating a switching transistor of a bottom arm of an auxiliary-related inverter based on a command from a control circuit, stepping up the voltage from the auxiliary battery by using a coil of the auxiliary motor as a reactor, and supplying the step-up voltage to the main power supply thereby charging the main power supply. At this time, a drive-related inverter and a DC/DC converter are stopped. When the main power supply is charged to a sufficient degree, the relays are opened to drive each load.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: August 16, 2005
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuhiro Ishikawa, Hiroshi Sugiura
  • Patent number: 6806671
    Abstract: Power from a high voltage battery (10) (for example 36V) is supplied through an inverter (12) to a motor generator (14). A low voltage battery (20) (for example 12V) is connected through a reactor (18) to the neutral point of the motor generator (14). A voltage ratio of the low voltage battery (20) to the high voltage battery (10) is preferably from 1:2 to 1:4. In order to set the neutral point voltage to a desired charging voltage into the low voltage battery (20), the inverter (12) is controlled so as to follow a current distortion phenomenon. In this way, in a dual-power source system with a voltage ratio of a low voltage battery (20) to a high voltage battery (10) between 1:2 and 1:4, voltage switching means for use in charging a charge voltage of a high voltage side into a low voltage source can be implemented at low cost.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: October 19, 2004
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yasushi Kusaka, Kimitoshi Tsuji
  • Publication number: 20040189219
    Abstract: A starter/alternator system for an engine and a battery of an automobile are provided. The system includes a starter/alternator machine; a three phase MOSgate control inverter/bridge electrically coupled to the starter/alternator machine, the three phase MOSgate control inverter/bridge including bridge connected MOSgated devices; a control ASIC electrically coupled to the bridge connected MOSgated devices of the three phase MOSgate control inverter/bridge, the control ASIC including all control circuitry required to control the starter/alternator machine; and a motor drive circuit electrically coupled to the control ASIC.
    Type: Application
    Filed: December 15, 2003
    Publication date: September 30, 2004
    Applicant: International Rectifier Corporation
    Inventor: Bertrand Vaysse
  • Patent number: 6798162
    Abstract: A system 10 provides a variable output voltage to a DC brush motor. The system includes a DC brush motor 14, a DC voltage source 12, a step-up, step-down DC/DC converter 16 including a switch 18. The DC/DC converter is constructed and arranged to step-up and step-down voltage from the source to provide an output voltage to the motor between 0 and 42 volts. A control unit 22 is constructed and arranged to receive an input signal 20 and to control the switch based on the input signal to control the motor.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: September 28, 2004
    Assignee: Siemens VDO Automotive Inc.
    Inventors: John Makaran, Ke Liu
  • Patent number: 6571163
    Abstract: An electrically controlled, decentralized control system in a vehicle includes at least two energy sources which are independent of one another and at least two control units. In addition, at least one high-current load is allocated to each control unit. The high-current load is permanently allocated to one of the energy sources, while the control units are selectively switchable to the one or the other energy source.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: May 27, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Hans Heckmann, Reinhard Weiberle, Bernd Kesch
  • Patent number: 6404151
    Abstract: An electric vehicle drive has an electric machine which can be alternatively driven as a motor or as a generator and has a d.c. connection to which a supply voltage can be applied, from a first energy source and/or a second energy source. The first energy source is designed for base load supply of the electric machine, while the second energy source comprises an energy accumulator designed for a short-term peak load supply of the electric machine. Also, vehicle braking energy can be stored by way of the electric machine in its generator operating mode. According to the invention, the second energy source in the form of an energy accumulator is coupled via a bidirectional DC/DC converter to a supply connection of the first energy source connected with the direct-voltage connection of the electric machine.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: June 11, 2002
    Assignee: DaimlerChrysler AG
    Inventor: Christian Bader
  • Patent number: 5962997
    Abstract: The wheel brakes of each vehicle axle or side or diagonal are supplied with current by a separate voltage source. To reduce the load on the vehicle's electrical system, the wheel brakes of a front axle are supplied with current first, and then the wheel brakes of a rear axle are supplied with current.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: October 5, 1999
    Assignee: Robert Bosch GmbH
    Inventor: Wolfgang Maisch
  • Patent number: 5818194
    Abstract: A blower motor unit having a variable speed motor and that is suitable for direct, drop-in replacement in a residential HVAC (heating, ventilation, and air conditioning) system that employs a PSC motor. The blower motor unit is provided with a neutral input and two hot AC line connections, one for connection to the heating power source and the other to the cooling power source. The blower motor unit senses which of the inputs is energized by sensing either voltage or current on at least one of the inputs, selects one of at least two reference signals in accordance with which input is energized, and presents the control input of the replacement variable speed motor with the selected reference signal, thereby controlling the speed of the variable speed motor. This motor control unit, and the method by which it selects one of two signals for application to a control input of a motor, are also independently useful to control any type of motor having at least two modes of operation.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: October 6, 1998
    Assignee: Emerson Electric Co.
    Inventor: Craig J. Nordby
  • Patent number: 5566219
    Abstract: The invention relates to an X-ray apparatus, comprising a circuit arrangement for accelerating and decelerating the rotary anode of a rotary-anode X-ray tube in which phase-shifted alternating voltages can be applied to the stator windings of the drive motor for the rotary anode in an acceleration mode and a direct voltage acts on at least one of the windings in a deceleration mode, and also comprising a control device for the acceleration mode and the deceleration mode.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: October 15, 1996
    Assignee: U.S. Philips Corporation
    Inventor: Gerd Vogler
  • Patent number: 4341982
    Abstract: A system for simultaneously and independently controlling a plurality of electric motors from a number of dispersed stations. The system operates by transmission of duty cycle modulated selected frequencies superimposed on a DC track voltage on a common power line servicing the motors. The modulation is variable and determines the speed of the motors. Transmitters are portable and designed removably to plug into a common signal transmission cable anywhere along its length without interaction. Receivers, each tuned to a specific frequency and associated with and controlling a motor, are coupled to the common power line.
    Type: Grant
    Filed: July 3, 1980
    Date of Patent: July 27, 1982
    Assignee: Power Systems, Inc.
    Inventors: Abbott W. Lahti, Stephen R. Russell