Having Electrical Synchronizing Interconnections Patents (Class 318/41)
  • Patent number: 10353846
    Abstract: A communication system with train bus architecture is described. The communication system with the train bus architecture comprises a coupling device for transmitting a first instruction packet string having instruction packets via first path; the controlled module for receiving the first instruction packet string via first path, wherein the controlled module selects one instruction packet from the instruction packets, replaces the selected instruction packet by first response packet for forming second instruction packet string, and processes the selected instruction packet to generate a second response packet; and a terminal device for receiving the second instruction packet string via the first path, and for transmitting the second instruction packet string back to the coupling device via the at least one controlled module along a second path from the terminal device to the coupling device wherein the first path is connected to the second path to form train bus architecture.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: July 16, 2019
    Assignee: VIEWMOVE TECHNOLOGIES, INC.
    Inventors: Shyh-Biau Jiang, Li-Yeh Liu, Dong-Liang Lee, Chuan-Fu Huang, Yun-Sheng Hsiao
  • Patent number: 10250170
    Abstract: A motor control device includes a master-shaft drive device to drive a master-shaft motor, and a slave-shaft drive device to drive a slave-shaft motor, the motor control device including a correction-amount calculation unit to use a detection result of a position of the master-shaft motor and a detection result of a position of the slave-shaft motor to calculate a correction amount for correcting a speed command that is to be used for controlling the master-shaft motor, a correction unit to use the correction amount to correct the speed command that is to be used for controlling the master-shaft motor, and a position control unit to execute position control on the slave-shaft motor by using the detection result of the position of the master-shaft motor as a position command.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: April 2, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Sayaka Sho, Jun Hattori, Atsuo Haishi, Masaya Harakawa
  • Patent number: 9963094
    Abstract: The present disclosure relates to a work machine, in particular in the form of a dump truck or of a truck, having a diesel electric traction drive, comprising at least one internal combustion engine, at least one alternator, at least one set of power electronics as well as at least one electric motor, wherein the power electronics are divided into two or more functional modules and at least one, each, functional module has an encapsulated housing.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: May 8, 2018
    Assignee: Liebherr-Mining Equipment Colmar SAS
    Inventors: Burkhard Richthammer, Kai Kugelstadt, Adrien Levaray, Bernd Sommer
  • Patent number: 9948228
    Abstract: The present invention provides a motor driving method, a battery pack, and a semiconductor device capable of variable-controlling a bus voltage from a battery pack. A battery pack outputting a bus voltage to a positive voltage node using a negative voltage node as a reference, an inverter unit converting the bus voltage to AC voltage by switching according to a PWM signal and driving a motor, and a motor control unit generating the PWM signal are used. The motor control unit outputs a voltage instruction signal for instructing the bus voltage toward the battery pack. The battery pack variable-controls the number of cells coupled in parallel between the positive voltage node and the negative voltage node so as to obtain the bus voltage according to the voltage instruction signal.
    Type: Grant
    Filed: August 20, 2016
    Date of Patent: April 17, 2018
    Assignee: Renesas Electronics Corporation
    Inventors: Yasuo Usuda, Yusuke Sugawara, Yoshitaro Kondo, Masaki Hogari
  • Patent number: 9899940
    Abstract: A method for controlling a first motor and a second motor to synchronize respective positions of the first motor and the second motor may comprise comparing the positions to determine a position difference, incrementally increasing a speed of one of the first motor and the second motor and incrementally decreasing a speed of the other of the first motor and the second motor according to the position difference, and repeating the incrementally increasing and incrementally decreasing until the respective positions are synchronized. Additionally, motor current limiting may be applied by reducing the target speed of the motor(s) with high applied torque(s), which may result in a position difference between the two motors subject to synchronization/correction. If current limiting is applied to one or both of the motors, speed synchronization may be applied in addition to position-based synchronization.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 20, 2018
    Assignee: Eaton Corporation
    Inventor: Souren Georges Fattal
  • Patent number: 9873407
    Abstract: Water is removed from the windshield of a ground vehicle via a wiper sweeping across the windshield, thus transporting the water thereon to a particular side. At least one remote sensor registers set of parameters in respect of other ground vehicles. A controller unit determines a point in time when a substantial amount of water is expected to hit the windshield of the own vehicle as the result of another vehicle moving proximate thereto and controls the operation of the wiper such that, before said point in time, the wiper is placed at a predetermined position. At said point in time, a stroke of the at least one wiper is initiated from the predetermined position over said surface. In one embodiment, this means moving the at least one wiper in a continuous sweep such that it passes the predetermined position at said point in time.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: January 23, 2018
    Assignee: SEMCON SWEDEN AB
    Inventors: Magnus Carlsson, Jonas Berg, Linus Helgesson, Johan Alminger, Stig Ursing, Nils Finnstedt
  • Patent number: 9859815
    Abstract: An energy storage system including a plurality of loads each converting direct current (DC) power stored in a battery thereof into alternating current (AC) power and outputting the AC power, a plurality of slave power controllers detecting zero crossing points of AC voltage signals output from one of the plurality of loads and controlling the plurality of loads in accordance with a control signal received from a master power controller, and the master power controller controlling the plurality of slave power controllers so as to control the plurality of loads in accordance with the control signal received from the master power controller after a preset time has lapsed since the detected zero crossing point.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: January 2, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Jae Seong Shim
  • Patent number: 9650831
    Abstract: A system and method of controlling light distribution in a space including an installed light source, an external light source, at least one blind(s) for a window in the space, a lighting control unit and a daylight/blind control unit, the method includes, in the lighting control unit, estimating task illuminances from the installed light source and the external light source at a plurality of measuring areas within the space, determining an intensity level of each of the installed light source based on the estimated illuminances; and determining a first positioning of the blinds according to predetermined requirements and/or measurements, in the daylight/blind control unit, receiving the plurality of measuring areas data within the space, determining a second positioning of the blinds according to predetermined requirements, selecting either the first or second positioning of the blinds to provide optimal daylight comfort, glare prevention and view.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: May 16, 2017
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Dagnachew Birru, Yao-Jung Wen
  • Patent number: 9475403
    Abstract: Provided is a method and controller for controlling a vehicle dc bus voltage. The method includes generating a parameter. The parameter is based on a reference dc bus voltage squared. The method includes controlling the vehicle dc bus voltage based on the parameter and a detected dc bus voltage. The method may also include generating another parameter based on a power demand associated with at least one of a motoring mode operation and a generating mode operation of a traction motor associated with the vehicle. The power demand is indicated in a message received via a dedicated high speed data bus. The method includes controlling the vehicle dc bus voltage based on the another parameter.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: October 25, 2016
    Assignee: DEERE & COMPANY
    Inventors: Long Wu, Chris J. Tremel, Zimin W. Vilar, Alan K. Gilman, Robert Shaw
  • Patent number: 9419549
    Abstract: An inverter electrically operatively connects to a multi-phase electric machine, and a method for controlling the inverter includes executing a six-step mode to control the inverter and monitoring an electric voltage angle of the electric machine at a preset sampling frequency. When the electric voltage angle approaches a step transition associated with control of one of a plurality of switches of the inverter in the six-step mode, an intermediate duty command for the one of the switches is determined and a carrier signal is aligned based upon a present state of the one of the switches. The one of the switches is controlled employing the intermediate duty command and the aligned carrier.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: August 16, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Jung Sik Yim, Bon Ho Bae
  • Patent number: 9403509
    Abstract: This invention concerns a method to detect the wetness state of a vehicle windshield surface (S) comprising a windshield wiper unit (1), the windshield wiper unit (1) comprising: —wiper blades (5) configured to wipe the windshield surface (S) when set in motion, —at least one motor (7) configured to set the wiper blades (5) in motion, —a controller (9), configured to control the at least one motor (7), the method comprising the steps: —measuring the power consumption of the at least one motor (7), —determining the wiping speed (W) of the wiper blades (5), —using the measured power consumption and determined wiping speed (W) to deduce a friction related coefficient of the windshield surface (S), —comparing the deduced value to at least one predetermined value in order to determine the wetness state of the vehicle windshield surface (S).
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: August 2, 2016
    Assignee: Valeo Systèmes d'Essuyage
    Inventor: Dominique Dias
  • Patent number: 9189038
    Abstract: An information handling system cooling fan has a vibration filter that tunes out predetermined fan vibration frequencies to reduce fan vibration transfer from the cooling fan to an information handling system chassis in a targeted frequency range. For example, a leaf spring and damper are biased between the cooling fan and a fan bay support so that stiffness of the spring attenuates selected vibration frequency ranges of the cooling fan bay subsystem, such as frequency ranges where the vibrations have the greatest amplitude or frequency ranges where the vibrations tend to damage other components of the information handling system.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: November 17, 2015
    Assignee: Dell Products L.P.
    Inventors: Corey D. Hartman, Jose A. Nava
  • Patent number: 9018862
    Abstract: An alternating current rotating machine control device that shares information among power conversion devices and instruments. A power conversion system has a top level control device, a master station, multiple power conversion devices, instruments (such as a temperature sensor and a pressure sensor), and the like. The top level control device is connected to two of the power conversion devices by a first communication line. These power conversion devices have two or more communication functions, and are connected to a remaining power conversion device, a temperature sensor, and a pressure sensor by a second communication line.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: April 28, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Nobuo Itoigawa
  • Patent number: 8963453
    Abstract: An inverter executing a PWM routine is configured to synchronize the switching periods of the PWM routine to an external signal. The external signal is generated, for example, by another inverter, a converter, or a high level controller. The external signal is preferably generated periodically, and the switching period is resynchronized to the external signal each time the external signal is received. Optionally, either the start time or the midpoint of the switching period may be aligned with external signal. Further, the external signal may be sent to multiple inverters. Preferably, a first portion of the inverters align the start time of their respective switching period to the external signal and a second portion of the inverters align the midpoint of their respective switching period to the external signal.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: February 24, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Bok Young Hong, Craig R. Winterhalter
  • Patent number: 8963466
    Abstract: A fan array vibration control system may include a fan array having a plurality of fans, and a control unit operatively connected to the fans. The control unit is configured to operate the plurality of fans and detect a phase relationship among the plurality of fans. The control unit is configured to reduce the phase relationship among the plurality of fans in order to reduce vibrations within the fan array.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: February 24, 2015
    Assignee: Huntair, Inc.
    Inventor: Lawrence G. Hopkins
  • Patent number: 8836270
    Abstract: In an inverter system, a phase adjusting unit configured to adjust, according to reception timing of first data, a phase of second PWM carrier to match a phase of first PWM carrier. A master inverter further includes an amplitude adjusting unit configured to adjust, when second data is received by a communication unit, according to the received second data, amplitude of a first command voltage to balance an actual output current output from a master inverter to the motor and an actual output current output from each of one or more slave inverters to the motor.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: September 16, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Goichi Kajiura, Masanori Kato
  • Patent number: 8791660
    Abstract: In some preferred embodiments, a motor control circuit 1 for controlling driving of a plurality of motors 3 and 4 includes a serial communication circuit configured to perform serial communication with an outside, a received data storage 15 configured to store data from the serial communication circuit, a motor mode setting holding circuit 16 configured to store motor mode settings which decide operations of the motors, and a detection circuit 24 configured to detect changes in driving pulse of the motor. Depending on the detected result of the detection circuit 24, the data stored in the received data storage 15 is transferred to the motor mode setting holding circuit 16.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: July 29, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Ryoichi Takahashi, Hiroshi Inoue, Masatoshi Komada
  • Publication number: 20140070734
    Abstract: This invention relates to methods and devices for motor speed control. The invention has particular application in the control of motors over packet networks. In embodiments of the invention, phase-locked loop principles are used to remotely control the speed of an electric motor over a packet network. The setpoint for the motor is supplied by arriving timestamps from a speed-mapped variable frequency source. The shaft speed of the motor is measured with a tachometer with its output proportional to the motor speed. Any deviation of the actual speed from the setpoint is amplified by the power amplifier whose output drives the motor. Speed control over packet networks allow smoother operation of a process, acceleration control, different operating speeds for each process recipe, compensation for changing process variables, slow operation for setup purposes, adjustments to the rate of production, accurate positioning, and control torque or tension of a system.
    Type: Application
    Filed: September 9, 2012
    Publication date: March 13, 2014
    Applicants: Khalifa University of Science, Technology, and Research, EMIRATES TELECOMMUNICATIONS CORPORATION, BRITISH TELECOMMUNICATIONS PLC
    Inventors: James Aweya, Nayef AlSindi
  • Patent number: 8665110
    Abstract: A system for transmitting electric power into a bore hole, the system having an electric transmission line extending through the bore hole between an electric power source and a receiving station, wherein the receiving station includes frequency increasing means for increasing the frequency of the electric current supplied through the electric transmission line, voltage converter means for changing the voltage of the electric current supplied to it via the frequency increasing means, connecting means for supplying the frequency-increased electric current to the voltage converter means, and means for connecting an electric load to the receiving station.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: March 4, 2014
    Assignee: Zeitecs B.V.
    Inventors: Josef Guillaume Christoffel Coenen, Ivan Tan Boon Kiat
  • Patent number: 8648559
    Abstract: The system comprises a first motor for applying rotational energy to a respective first wheel of the vehicle. A second motor is arranged for applying rotational energy to a respective second wheel of the vehicle. A first inverter is coupled to the first motor, where the first inverter is capable of receiving direct current electrical energy from the direct current bus. The first inverter is configured to provide a first group of alternating currents with a corresponding reference phase. A second inverter is coupled to the second motor. The second inverter is capable of receiving direct current electrical energy from the direct current bus. The second inverter is configured to provide a second group of alternating currents with a phase shift with respect to the reference phase, such that the phase shift is effective to reduce the direct current ripple on the direct current bus.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: February 11, 2014
    Assignee: Deere & Company
    Inventor: Brij N. Singh
  • Patent number: 8629634
    Abstract: A method for is disclosed for using pulse-width modulated (PWM) signals in the control of a plurality of electric motors or of at least one electric motor with multiple windings. The method comprises steps of: measuring the current being drawn by each of said electric motors; transmitting signals corresponding to the current being drawn said plurality of motors to a central controller; transmitting from said central controller signals corresponding to the amount of current to be drawn by each motor, whereby the relative phases and durations of said signals are distributed according to a predetermined protocol; and repeating steps (a) through (c) while said electric motors are in operation. The distribution of PWM signals defines the total current drawn from said source of electricity as a function of time.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: January 14, 2014
    Inventor: Yesaiahu Redler
  • Patent number: 8622002
    Abstract: A rail vehicle has a powered bogie, wherein the powered bogie has driven wheels. Each driven wheel of the powered bogie can be driven by an electric machine, with a power converter being assigned to the electric machine. As a result, a separate power converter is assigned to each driven wheel.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: January 7, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Andreas Jöckel
  • Patent number: 8599435
    Abstract: What is disclosed is a novel system and method for determining printer component velocity variations by analyzing multiple page test patterns. A test pattern, such as ladder chart targets, is produced that extends across multiple pages. Corresponding page sync signals are recorded and used to maintain phase coherence when analyzing scanned images associated with the multiple pages. An algorithm determines the ladder rung positions and the average photoreceptor velocity between each ladder rung on each scanned image for each page. Interpolation is used for proper phase alignment of the velocity data that spans multiple pages. The long assembly of phase coherent velocity data is then analyzed in one embodiment to determine its frequency content and to estimate the photoreceptor motion quality error sources. Based upon these estimated error sources, a trouble condition or pending maintenance problem with the printer is able to be indentified.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: December 3, 2013
    Assignee: Xerox Corporation
    Inventors: Peter Paul, Claude S. Fillion
  • Patent number: 8417398
    Abstract: A vehicle, including two controllable electrical drives, which are capable of being operated in mutual dependence, the rotational speed and the torque of a first drive, in particular a master drive.
    Type: Grant
    Filed: August 5, 2006
    Date of Patent: April 9, 2013
    Assignee: Sew-Eurodrive GmbH & Co. KG
    Inventor: Markus Reichensperger
  • Patent number: 8355159
    Abstract: A method of synchronizing the timing of a plurality of physically coupled print engines wherein the receiving sheet is inverted between a first and a second print engine including determining any change in the speed of the master print engine relative to the speed at original set up and adjusting the timing parameters within the slave print engines based on the speed of the master engine.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: January 15, 2013
    Assignee: Eastman Kodak Company
    Inventors: Michael T. Dobbertin, Thomas K. Sciurba
  • Patent number: 8305016
    Abstract: A control device for electric motors, capable of precisely moving one object by using two electric motors based on periodically repeated commands. The control device includes a first learning controller for calculating an amount of correction so that a positional deviation of a first electric motor is minimized, and a second learning controller for calculating an amount of correction so that a positional deviation of a second electric motor is minimized. The first and second learning controllers are independent from each other, and configured to minimize the positional deviation of the corresponding electric motor. The parameters set in the learning controllers, each defining the response of learning control of each electric motor, are equal to each other.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: November 6, 2012
    Assignee: Fanuc Ltd
    Inventors: Tadashi Okita, Yukio Toyozawa, Naoto Sonoda
  • Patent number: 8294392
    Abstract: An arrangement for supplying power to a system includes a first electric drive unit constructed to supply mechanical power to or receive mechanical power from a first coupled system of machines and a second electric drive unit constructed to supply mechanical power to or receive mechanical power from a second coupled system of machines. The first and second coupled system of machines are constructed to receive mechanical power or mechanical energy or to supply mechanical power or mechanical energy. The arrangement further includes a first kinetic energy storage device having a first electrical energy exchange machine which is electrically connected to the first electric drive unit, and a second kinetic energy storage device having a second electrical energy exchange machine which is electrically connected to the second electric drive unit. The first kinetic energy storage device is coupled to the second kinetic energy storage device.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: October 23, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jürgen Krejtschi, Elmar Schäfers
  • Patent number: 8218781
    Abstract: The present examples provide for the cancellation, or substantial reduction, of fan noise typically encountered in equipment cooling applications. Local audio nulls may be created by adjusting fan velocity and/or phase to cancel the fan noise near an operator. In a first example, phase and velocity of the fan may be controlled by feedback techniques. This technique utilizes feedback provided by a microphone located in the proximity of the operator to create an area of audio nulling of the fan noise. Local audio nulls may also be created by manipulating fan, phase and velocity by a controller that implements a process to create local audio nulls using the fixed position of equipment and the operator in the determination.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: July 10, 2012
    Assignee: Rockwell Collins, Inc.
    Inventor: Christopher J. Swanke
  • Publication number: 20120074876
    Abstract: A method for is disclosed for using pulse-width modulated (PWM) signals in the control of a plurality of electric motors or of at least one electric motor with multiple windings. The method comprises steps of: measuring the current being drawn by each of said electric motors; transmitting signals corresponding to the current being drawn said plurality of motors to a central controller; transmitting from said central controller signals corresponding to the amount of current to be drawn by each motor, whereby the relative phases and durations of said signals are distributed according to a predetermined protocol; and repeating steps (a) through (c) while said electric motors are in operation. The distribution of PWM signals defines the total current drawn from said source of electricity as a function of time.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 29, 2012
    Inventor: Yesaiahu REDLER
  • Patent number: 8130478
    Abstract: A power limiting system for multiple electric motors includes an electrical power generating component, such as an alternator, and a plurality of motor controllers connected to an electrical bus. Each motor controller compares the voltage on the bus to a specified minimum voltage and a specified maximum voltage, and reduces its electric power output if the voltage on the bus is less than the maximum voltage while continuing to operate the electric motors.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: March 6, 2012
    Assignee: Deere & Company
    Inventors: Clement Vanden Godbold, Patrick Wilson Cross
  • Patent number: 8054011
    Abstract: A variable frequency transformer including: a first parallel circuit including at least two of the rotary transformers arranged in parallel and having an isolating circuit breaker connected to a rotor winding of each of the rotary transformers, and a separate synchronizing circuit breaker connected to a stator winding in each of the rotary transformers in the first parallel circuit; a first main transformer having a first winding connectable to a first power grid and a secondary winding connectable to the isolating circuit breaker in the first parallel circuit; a second main transformer having a first winding connectable to a second power grid and a secondary winding connectable to each of the synchronizing circuit breakers in the first parallel circuit, and a control system operatively connected to each of the synchronizing circuit breakers, the isolating circuit breakers and the drive motors for each of the rotary transformers.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: November 8, 2011
    Assignee: General Electric Company
    Inventor: Paul E. Marken
  • Patent number: 8044614
    Abstract: A wiper apparatus includes: a wiper blade driven by a motor; and a wiper blade driven by a motor. The motors are drive-controlled by control microcomputers, respectively. The control microcomputers are connected to each other through a communication line. While exchanging position information of the wiper blades through the communication line, the control microcomputers synchronously drive the motors on the basis of a position relationship between both of the wiper blades. In the case where a communication abnormality occurs when the position relationship between the wiper blades is in a normal state, the wiper blade is stopped after reaching a lower turning position. In the case where the communication abnormality occurs in a state where the position relationship between the blades is inverted, the blade is stopped after reaching an upper turning position.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: October 25, 2011
    Assignees: Mitsuba Corporation, Honda Motor Co., Ltd.
    Inventors: Toshiyuki Amagasa, Taku Suzuki, Takashi Kondo, Toru Namiki
  • Patent number: 7714524
    Abstract: A system and method for controlling multiple cooling fans is presented. The circuitry for directly driving each of the motors is removed from the motor casings, thus increasing air flow and reducing replacement costs should a motor fail. The system includes a common processor for centrally controlling the speeds of the motors and monitoring the performance of each of the multiple motors.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: May 11, 2010
    Assignee: Minebea Co., Ltd.
    Inventors: Scott Frankel, Nigel Strike, Eric Hardt, Takashi Shinano
  • Publication number: 20090284189
    Abstract: A continuously variable electrical gearbox has a rotatable rotor, a stator, an interrotor with a first and a second cage conducting first and second magnetisation currents. A regulator has a decoupling network connected in series with the gearbox having as input parameters: set values for the first and second magnetisation current levels, set values for the first and second torque between the rotor and interrotor and interrotor and stator and as output parameters: rotor current and stator current, a recording device for recording first and second magnetisation currents and a feedback system for feedback of first and second magnetisation currents as input parameters from the decoupling network. Rotor current and stator current are determined from the input parameters: set values for the first and second magnetisation current levels, set values for the first and second torque, first and second magnetisation currents are recorded and fed back to the decoupling network.
    Type: Application
    Filed: May 29, 2007
    Publication date: November 19, 2009
    Inventor: Johannes Reinschke
  • Patent number: 7586284
    Abstract: A synchronization control system includes plural controlling object apparatuses connected through first and second wired OR lines. Each controlling object apparatus includes a function of switching an output to the first wired OR line from a first state to a second state in an odd numberth synchronization waiting state and switching an output to the second wired OR line from the first state to the second state in an even numberth synchronization waiting state. A control apparatus determines an odd numberth synchronization in response to changing of the first wired OR line from the first state to the second state when all the controlling object apparatuses enter the odd numberth synchronization waiting state, and determines an even numberth synchronization in response to changing of the second wired OR line from the first state to the second state when all the controlling object apparatuses enter the even numberth synchronization waiting state.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: September 8, 2009
    Assignee: Fujitsu Limited
    Inventor: Tadashi Akita
  • Patent number: 7560881
    Abstract: An electric drive fuel control system and method for controlling a total drive torque supplied to a fuel metering pump includes a first main drive motor, a second main drive motor, and a backup drive motor, all coupled to the fuel metering pump. The operability of a main motor control to control electric current supply to the first main drive motor or the second main drive motor is determined. If the main motor control is operable, the total drive torque to the fuel pump is supplied from the backup motor and either the first main drive motor or the second main drive motor. If the main motor control is inoperable, the total drive torque to the fuel pump is supplied from only the backup drive motor.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: July 14, 2009
    Assignee: Honeywell International Inc.
    Inventor: Bruce Anson
  • Patent number: 7538501
    Abstract: A power system including at least two self-controlled synchronous machines operating in parallel synchronously, a central three-phase converter to which all these machines are connected in parallel, at least two rotor position sensors. The system also includes at least one control module that receives phase currents from each synchronous machine, signals output from position sensors, and a required reference torque value and that powers the three-phase central converter so as to slave the phase currents for each machine as a function of the required reference torque.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: May 26, 2009
    Assignees: Airbus France, Centre National de la Recherche Scientifique
    Inventors: Etienne Foch, Gaetan Bisson, Pascal Maussion, Maria Pietrzak-David, Maurice Fadel
  • Patent number: 7514895
    Abstract: A method and a device for synchronously controlling multiple printing presses or multiple units in a printing press can reduce power consumption and improve durability of motors and motor bearings. A synchronous control device for multiple printing presses includes machine shafts of a main printing press and a sub printing press respectively provided with drive motors and is configured to synchronously control rotation of the sub printing press with respect to rotation of the main printing press. Here, drive motor brakes are attached to the respective drive motors, and drive control devices respectively configured to release synchronous control of the drive motor of the sub printing press by a stop instruction and to start the drive motor brakes of both of the printing presses are provided.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: April 7, 2009
    Assignee: Komori Corporation
    Inventor: Hiromitsu Numauchi
  • Patent number: 7466086
    Abstract: A motor drive unit comprises a DC power source, a plurality of inverter circuits for converting the a power of this DC power source to an AC power, current detectors for detecting an output current of at least one of those plurality of inverter circuits and a controller for performing PWM control of those plurality of inverter circuits. This controller is constructed in a way to synchronize a PWM period of the plurality of inverter circuits, so as to drive a plurality of motors at once by means of those plurality of inverter circuits respectively.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: December 16, 2008
    Assignee: Panasonic Corporation
    Inventors: Mitsuyuki Kiuchi, Sadayuki Tamae, Hisashi Hagiwara, Masahiro Suzuki, Shuichi Kojima
  • Patent number: 7456599
    Abstract: An apparatus for use with an encoder feedback device includes a comparator, a counter, and a prediction unit. The encoder feedback device is coupled to rotate with a rotating load and operable to generate at least one feedback position signal indicative of movement of the rotating load. The comparator is operable to receive the feedback position signal and generate a first position signal including a plurality of edges based on the feedback position signal. The counter is operable to receive the first position signal and count the edges to periodically generate position values at a predetermined update interval. The prediction unit is operable to receive a position data request at a first time and predict a position of the rotating load at the first time as a function of at least a subset of the position values generated prior to the first time and a misalignment between the first time and the predetermined update interval to generate an aligned position signal.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: November 25, 2008
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Richard W. Piefer, Thomas J. Rehm, Juntao Quan
  • Patent number: 7432674
    Abstract: A transmission path delay is set in a shift setting register. A slave unit generates a PRE_ITP signal in response to a timing signal (ITP signal) issued by a master unit. The phase difference between this PRE_ITP signal and the ITP signal unique to the slave unit is loaded into a period modification counter. A timer corrects a reference value, outputs position/speed control period signals (SYN signals) and counts down the period modification counter with these SYN signals until the period modification counter reaches zero. Furthermore, the ITP signal unique to the slave unit is outputted every time a predetermined number of the SYN signals are outputted.
    Type: Grant
    Filed: March 3, 2006
    Date of Patent: October 7, 2008
    Assignee: Fanuc Ltd.
    Inventors: Kazunari Aoyama, Kunitaka Komaki, Minoru Nakamura, Takaaki Komatsu
  • Patent number: 7425806
    Abstract: A variable speed drive is provided having a converter to convert an AC voltage to a DC voltage, a DC link to filter and store energy from the converter, and a plurality of inverters. Each inverter is configured to convert a DC voltage to an AC voltage and is electrically connected in parallel to the DC link. An interleaved pulse width modulation control technique is used to control the operation of the plurality of inverters and possibly the converter to lower the RMS ripple current in the DC link.
    Type: Grant
    Filed: April 12, 2004
    Date of Patent: September 16, 2008
    Assignee: York International Corporation
    Inventors: Harold Robert Schnetzka, Ivan Jadric, Scott Victor Slothower
  • Patent number: 7417386
    Abstract: A method and assembly for synchronizing machine operations, the assembly comprising a reference generator for generating a speed reference signal and a position reference signal, a plurality of slave units, each slave unit including, a mechanical device, a separate motor linked to and driving the mechanical device and a separate unit controller for controlling the unit motor, the unit controller receiving and using the reference signals to control motor operation and a synchronizer receiving the reference signals from the control signal source and simultaneously providing the reference signals to each of the slave unit controllers for use in controlling operation of the motors in a synchronized fashion.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: August 26, 2008
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Richard W. Piefer, Thomas J. Rehm, Kevin L. Baumann, Christopher W. Como, John D. Davis, David C. Stringfellow
  • Patent number: 7304444
    Abstract: A battery vehicle includes a battery configured to supply DC power, and first and second motors configured to drive first and second wheels in response to first and second motor drive powers, respectively. A first inverters generates a first control data and supplies the first motor drive power to the first motor from the DC power while limiting the first motor drive power based on the first control data and a second data. A second inverter generates the second control data and supplies the second motor drive power to the second motor from the DC power while limiting the second motor drive power based on the first and second control data.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: December 4, 2007
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Shinichi Takano, Mitsugu Nakamura, Teruo Mizuno, Kazuya Fukuda
  • Patent number: 7292002
    Abstract: In a control method for a twin synchronization in which two motors for driving two axes (moving elements 3) mechanically fastened to each other by a fastening part (a fastening jig 6) are synchronously operated, one of the two axes is operated at low speed by a position control and the other axis is allowed to freely run and follow the one axis and a return to the origin is performed. A positional deviation between the one axis and the other axis is measured at an arbitrary pitch. The positional deviation corresponding to a position where the one axis travels is stored in a data base as a function. One position command is directly distributed to the one axis as a main position command and the position command is distributed to the other axis as a position command corrected by using the function stored in the data base to perform an operation.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: November 6, 2007
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Kanji Watanabe, Kazuhiko Watariyou, Naoto Kiyota
  • Patent number: 7282873
    Abstract: A multi-fan apparatus and method incorporates mutual active cancellation of fan noise and/or vibrations. The multi-fan apparatus includes two or more fans circuits, each comprising a fan, a fan speed controller and a separate tachometer, and a fan phase controller. The phase controller is connected to at least one fan speed controller and to each tachometer. Each fan's speed is independently and dynamically maintained at the same set speed by the fan speed controllers using an independent control loops. A noise and/or vibration cancellation phase difference between fans is determined in order to achieve destructive interference of pressure waves and, thus, noise and/or vibration reduction, in pre-determined region of a system incorporating the multi-fan apparatus. The phase controller establishes and maintains this cancellation phase difference between the fans based upon feedback from the tachometers.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: October 16, 2007
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Bulent Abali, D. Scott Guthridge, Richard E. Harper, Peter A. Manson, Harry B. Marr, Jr.
  • Patent number: 7276865
    Abstract: A power output apparatus includes two motor generators, a DC power supply, a relay, three inverters and a control CPU. One of the motor generators includes three-phase coils. The DC power supply is connected via the relay between respective neutral points of the three-phase coils. When the sum of respective powers of the motor generators is zero, the control CPU generates a signal SE at L level for rendering the relay OFF to output the generated signal to the relay, and generates signals PWMC1, PWMC2 and PWMI3 for driving the other motor generator by electric power generated by the one motor generator to output the generated signals to the inverters respectively.
    Type: Grant
    Filed: January 6, 2004
    Date of Patent: October 2, 2007
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kiyoe Ochiai
  • Patent number: 7202616
    Abstract: A synchronous control device which is provided with drive motors and a central control unit generating a synchronous reference signal and with which the drive motor is controlled to rotate synchronously with the synchronous reference signal supplied from the central control unit, which is provided with: device motor brakes for braking a rotation of the drive motor; machine home position detectors for detecting a rotation phase of the drive motor; and drive controlling means for controlling a drive motor in such a manner that the drive braking means is activated depending on a stop instruction supplied from the central control unit and a required rotation phase of the drive motor is stored; a comparison between the required rotation phase of the drive motor and the rotation phase thereof is performed at the time of re-start; and a home position alignment of the drive motor is performed at a start time of a subsequent operation.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: April 10, 2007
    Assignee: Komori Corporation
    Inventor: Hiromitsu Numauchi
  • Patent number: 7196488
    Abstract: A motor driving apparatus capable of drivingly controlling a plurality of inverter units with a single motor driving command from a motor control unit, and thereby control a large-capacity motor or the like. The motor control unit sends out a single motor driving command (torque command) S. An intermediary unit obtains motor driving commands S×A1 to S×A4 for the inverter units by multiplying the motor driving command S by each of coefficients A1 to A4 set in advance. The inverter units are fed with the motor driving commands S×A1 to S×A4 individually and drive a single motor. Since the motor is driven by the total current supplied by the inverter units, the motor can generate a large torque. The motor control unit only needs to generate a single motor driving command S, and hence only needs to operate a single processing part. Hence, the motor control unit can generate and send out motor driving commands for other motors to drive them.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: March 27, 2007
    Assignee: Fanuc Ltd
    Inventors: Shunsuke Matsubara, Shinichi Horikoshi, Hiroyasu Sato
  • Patent number: RE40165
    Abstract: A synchronization control device and a synchronization control method are provided in which it includes controllers Am and As1 of a master section and a slave section for accurately synchronizing rotational frequency and rotation phases of driving electric motors Mm and Ms1. The controller As1 includes rotational frequency detectors Ss1, Fs1, a master phase counter Cm1, and a slave phase counter Cs1, and detects at all times both of a rotational frequency and a rotation phase of the electric motors Mm of the master based upon an output of the rotary encoder Pm, and further detects at all times both of a rotational frequency and a rotation phase of the electric motor Ms1 of the slave.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: March 25, 2008
    Assignee: Kabushiki Kaisya Tokyo Kikai Seisakusho
    Inventors: Noriyuki Shiba, Keiichi Fukushima, Takeshi Mitsuhashi, Ikuo Kotani