Dynamic Braking Patents (Class 318/375)
  • Patent number: 11290034
    Abstract: There are provided at least two disconnection contactors each of which switches between connection and disconnection of each of at least two of three second power lines for supplying a three-phase alternating-current voltage generated by an inverter to a second PM motor, at least two short-circuit contactors each of which switches between connection and disconnection between the two second power lines of each of at least two of the pairs of the three second power lines, and a calculator to control the disconnection contactors and short-circuit contactors.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: March 29, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keisuke Uemura, Kazunori Hatakeyama, Yuichi Shimizu
  • Patent number: 11199039
    Abstract: A drive device for a vehicle flap includes an electric motor (2) for driving the vehicle flap, and a supply switching circuit (3). The supply switching circuit (3) includes a first voltage source (9) for supplying current to the electric motor (2), a first electrical supply line (4) and a second electrical supply line (5). The first voltage source (9) is arranged between the first electrical supply line (4) and the second electrical supply line (5). The drive device also includes a control switching circuit (12) including a second voltage source (14) and a switching control device (13). The drive device includes a switching element (10) and a diode (11) connected between the first electrical supply line (4) and the second electrical supply line (5).
    Type: Grant
    Filed: August 15, 2018
    Date of Patent: December 14, 2021
    Assignee: EDSCHA ENGINEERING GMBH
    Inventors: Marc Zander, Jochen Bals
  • Patent number: 11167644
    Abstract: A system for active short circuit notification in an electric motor of a hybrid electric vehicle including a traction battery, an internal combustion engine in mechanical communication with the motor, and a propulsion system driven by the motor or engine. The system includes an inverter and inverter controller to generate signals to operate inverter switches to produce AC for the motor or DC for battery charging. In response to motor speed exceeding a threshold, the inverter controller is configured to generate signals to operate the switches to produce an active short circuit in the motor to prevent battery overcharging. In response to an active short circuit, the inverter controller is configured to transmit a notification signal to a vehicle controller configured to generate an engine stop control signal operative to stop the engine to reduce current circulation between the inverter and motor caused by the active short circuit.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: November 9, 2021
    Assignee: LEAR CORPORATION
    Inventor: Xiaoyan Wang
  • Patent number: 10876346
    Abstract: A braking device for a moveable door leaf includes an electrical brake motor operated as a generator. The motor shaft of which is rotatable by a movement of the door leaf and which can be controlled for regulating the closing speed of the door leaf by an electronic evaluation and control unit, which is at least partially provided with electrical energy by an electric motor operated as a generator and/or by an additional generator unit. The electronic evaluation and control unit is operable in a sleep mode and is cyclically displaceable into a waking state depending on the closing speed of the door leaf. A door closer with a mechanical energy storage and a braking device is also disclosed.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: December 29, 2020
    Assignee: Geze GmbH
    Inventors: Matthias Hucker, Erhard Hahn
  • Patent number: 10870355
    Abstract: This motor driving control apparatus has (A) an inverter unit configured to drive a motor; (B) a separation switch configured to separate a power source from the inverter unit; and (C) a controller configured to instruct the separation switch to separate the power source from the inverter unit and control the inverter unit to perform switching according to a speed and a braking target torque, upon detecting an event that braking should be performed without passing a regenerative current to the power source from the inverter unit. By introducing the separation switch that operates as described above, it becomes possible to perform control so as to consume the power by the motor itself without passing the regenerative current to the power source such as a battery.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: December 22, 2020
    Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.
    Inventors: Masato Tanaka, Yasuo Hosaka, Hiromi Hagiwara, Teruaki Kawahigashi, Yuto Kajiya, Taichi Yanaoka
  • Patent number: 10851574
    Abstract: A braking device for a movable door wing comprises an electric motor operated as a generator with a motor shaft which is rotatable by a movement of the door wing and which expends motion-dependent motor voltage at a contact pair, as well as a braking circuit upon which the motor voltage is applied or applicable and via which, the contact pair is short-circuitable in order to dampen a movement of the door wing. It is provided that the braking circuit comprises two anti-serially arranged field-effect transistors wherein their drain terminals are connected each to another contact of the contact pair and wherein their source terminals are connected to each other and preferably also connected to earth or a zero line, so that the contact pair is short-circuited depending on the switching state of the field effect transistors.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: December 1, 2020
    Assignee: GEZE GMBH
    Inventors: Matthias Hucker, André Sebastiaan Maria Jansen
  • Patent number: 10829146
    Abstract: The present disclosure relates to an apparatus and method for controlling a motor in which a failure has occurred in a vehicle steering system. A vehicle motor control apparatus according to an embodiment may include a motor failure sensor configured to determine whether a failure has occurred in a motor based on information of a current flowing in each phase of the motor provided in a vehicle steering system, and a motor controller configured to apply a demagnetization current to the motor for permanently demagnetizing the magnet in the motor when the failure has occurred in the motor. Accordingly, a driver is capable of performing stable steering even when the motor has failed.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: November 10, 2020
    Assignee: MANDO CORPORATION
    Inventor: Tae Sik Kim
  • Patent number: 10612797
    Abstract: The present invention provides an outdoor unit for an air conditioner that can be constructed at low cost while reducing risk of malfunction. The outdoor unit has a compressor; a fan motor; a compressor driver board having a compressor inverter circuit and a compressor driver circuit; and a fan driver board having a fan inverter circuit and fan driver circuit. The compressor driver board has at least either: a shared control circuit that feeds a first switching signal for a compressor to the compressor driver circuit and feeds a second switching signal for a fan to the fan driver circuit; or a shared power source circuit that steps down a first DC voltage to a second DC voltage and supplies the second DC voltage to the compressor driver circuit and to the fan driver circuit.
    Type: Grant
    Filed: December 26, 2016
    Date of Patent: April 7, 2020
    Assignee: Hitachi-Johnson Controls Air Conditioning, Inc.
    Inventors: Takayuki Hashimoto, Takashi Ooishi, Shin Miura, Rei Kasahara
  • Patent number: 10518599
    Abstract: Provided is a damper with which the energy efficiency for attenuating input vibration corresponding to the unsprung resonance frequency and the sprung resonance frequency can be improved. Also provided is a method for manufacturing this damper. In this damper the electrical resonance frequency, as specified by the inductance of an electromagnetic motor and the capacitance of a capacitor, is set within ±20% of the unsprung resonance frequency, thereby enabling the input vibration corresponding to the sprung resonance frequency as well as the input vibration corresponding to the unsprung resonance frequency to be reduced.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 31, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventor: Nobuharu Kuriki
  • Patent number: 10450797
    Abstract: A rolling shutter driving device includes a motor, a locking assembly and a gearbox. The motor includes a stator and a rotor. The rotor includes a rotary shaft connected to the gearbox. The rotary shaft drives through the gearbox a rolling shutter to extend or retract. The locking assembly includes a brake pad slidingly fitted on the rotary shaft and a rotary member fixedly mounted to the rotary shaft. The brake pad is circumferentially fixed relative to the stator. The brake pad is slidable relative to the rotary shaft so as to be selectively engaged with the rotary member to lock the rotary shaft and hence hold the load in position, or disengaged from the rotary member to unlock the rotary shaft.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: October 22, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Yue Li, Chui You Zhou, Wei Zhang, Yong Gang Zhang, Ming Chen, Yong Wang
  • Patent number: 10391869
    Abstract: An energy conversion device for a vehicle is particularly suited for a rail vehicle. The energy conversion device has, in at least one mode, a unit which operates as a generator unit and has at least one synchronous machine, and which has at least one energy discharge unit which is provided for discharging at least a portion of an electrical energy generated by the generator unit, and has at least one resistor unit. The novel energy discharge unit has at least one control unit which is provided to set operating modes from a set of operating modes in which the resistor unit makes available a different resistance value in each case.
    Type: Grant
    Filed: October 28, 2016
    Date of Patent: August 27, 2019
    Assignee: Siemens Mobility GmbH
    Inventors: Christian Foerth, Stefan Hassler, Stefan Koch, Sabine Methner, Gerhild Schinagl, Thorsten Stuetzle
  • Patent number: 10337781
    Abstract: A chiller system includes a compressor, a condenser and an evaporator in fluid communication. A motor drives the compressor. A variable speed drive powers the motor. An oil heater and pump system circulate heated lubricating oil in the compressor. A control panel is arranged to determine whether an input parameter is greater than or equal to a threshold parameter; deactivate the VSD in response to sensing that the input parameter is less than the threshold parameter; determine at least one chiller capacity control parameter at a point when the VSD is deactivated, and maintain the at least one chiller capacity control parameter while the VSD is deactivated; determine that the input parameter has been restored; determine a motor rotation and motor rotational speed; and in response to determining that the input parameter is restored and the motor is rotating in a forward direction, reactivate the VSD.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: July 2, 2019
    Assignee: Johnson Controls Technology Company
    Inventors: Curtis Christian Crane, Mark Bodell, II, Curtis G. Rager, John C. Hansen, Dean K. Norbeck
  • Patent number: 10333436
    Abstract: Drive circuits for parallel electric motors are provided. A drive circuit includes an inverter, at least one current sensor, and a DSP. The inverter is coupled to and configured to provide three phase power to a plurality of parallel electric motors. The at least one current sensor is coupled to the inverter and is configured to measure stator phase currents output by the inverter for driving the plurality of parallel electric motors. The DSP is coupled to the inverter and the at least one current sensor and is configured to receive the stator phase currents from the at least one current sensor, and generate at least one PWM signal for controlling the inverter based on the stator phase currents.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: June 25, 2019
    Assignee: REGAL BELOIT AMERICA, INC.
    Inventor: Ludovic Andre Chretien
  • Patent number: 10333382
    Abstract: In an electric power converter, a driver unit includes an output unit, an auxiliary power source, a switch circuit unit, and a diode. The output unit includes first and second MISFETs and selectively outputs an on signal or an off signal to a gate electrode of a first HEMT. The auxiliary power source outputs a predetermined positive voltage. The switch circuit unit selectively connects a source electrode of the first MISFET to the auxiliary power source or a drain electrode of the first HEMT. The diode is connected to a source electrode of the second MISFET and is oriented such that forward current flows to a source electrode of the first HEMT. In the event of a short circuit in a certain HEMT, a microcomputer connects the source electrode of the first MISFET to the auxiliary power source and outputs an off command to the driver unit.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: June 25, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Hiroshi Kitamoto
  • Patent number: 10298159
    Abstract: A method includes selectively communicating each of a plurality of motor winding signals to a first node at an integrated circuit based on whether the corresponding motor winding is energized. A zero-crossing event at an unenergized motor winding signal is determined based the unenergized motor winding signal and based on a signal at the first node.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: May 21, 2019
    Assignee: NXP USA, Inc.
    Inventors: Chongli Wu, Jie Jin, Yizhong Zhang
  • Patent number: 10224838
    Abstract: A method and device for electrodynamic braking of a universal motor. The method comprises the steps of continuously ascertaining a rotational speed of the universal motor, temporarily, periodically short-circuiting an armature of the universal motor with a semiconductor switch, and regulating firing angles of the semiconductor switch with a regulating device. The regulating device regulates firing angles of the semiconductor switch such that the rotational speed of the universal motor is adapted with minimal deviation to a rotational speed of a target rotational speed profile.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: March 5, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Jacek Wiszniewski, Kamil Pogorzelski
  • Patent number: 10186996
    Abstract: A method for operating an electrical power system includes disabling bridge switching of one of the rotor-side converter or line-side converter. The method further includes gating on the dynamic brake after the disabling occurs, comparing a power converter input variable to a primary predetermined variable threshold, and forcing the gated-on dynamic brake to a 100 percent duty cycle when the power converter input variable exceeds the primary predetermined variable threshold.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: January 22, 2019
    Assignee: GENERAL ELECTRINC COMPANY
    Inventors: Cornelius Edward Holliday, David Smith
  • Patent number: 10073322
    Abstract: An image capturing apparatus, comprises an image sensor having a focus detection pixel; a focus detection unit configured to perform focus detection, by using a signal from the focus detection pixel; a focus adjustment unit configured to control focus adjustment of an imaging lens; a lock unit configured to lock the focus adjustment of the imaging lens; and a control unit configured to control so as to, if the focus adjustment of the imaging lens is caused to transition from a locked state to a state where the focus adjustment lock is cancelled in continuous shooting, temporarily cause the continuous shooting to stop, and, after performing the focus adjustment of the imaging lens and confirming that the imaging lens has focused on the subject, restart the continuous shooting.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: September 11, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasutaka Naka
  • Patent number: 9966887
    Abstract: A back electromotive force (BEMF) zero cross may be detected in a brushless direct current (BLDC) motor that is controlled by pulse width modulation (PWM). A phase input of the BLDC motor is tri-stated during PWM periods in which the phase input conducts motor drive current, and the tri-stating of the phase input is used to determine whether a BEMF zero cross has occurred in the BLDC motor.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: May 8, 2018
    Assignee: Texas Instruments Incorporated
    Inventor: Yisong Lu
  • Patent number: 9909943
    Abstract: A device can prevent a failure in the actuation of a braking mechanism, which is caused by adhesion of adhesive substances. The device includes a heating part for heating the braking mechanism, a heat controller for controlling a heating operation of the heating part, a brake controller for actuating the braking mechanism when the heat controller stops the heating operation, and the temperature of the braking mechanism decreases, an actuation delay measuring part for measuring an actuation delay of the braking mechanism when the brake controller actuates the braking mechanism, and a comparison part for comparing the actuation delay measured by the actuation delay measuring part with a reference value of the actuation delay of the braking mechanism.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: March 6, 2018
    Assignee: FANUC CORPORATION
    Inventors: Katsuya Ono, Takeshi Tamaki, Kaname Matsumoto
  • Patent number: 9889753
    Abstract: A driving apparatus for an electric vehicle is provided. The driving apparatus for the electric vehicle can charge the other batteries using a charging voltage of any one battery in a state in which an engine is not driven, control a voltage generated by an integrated starter generator (ISG), selectively charge a plurality of batteries having different charging voltages without using a separate converter, and reduce a weight and volume thereof.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: February 13, 2018
    Assignee: LG Electronics Inc.
    Inventors: Junbo Yun, Heeseok Jeong, Suyoung Yun
  • Patent number: 9884568
    Abstract: A control apparatus for a vehicle including a three-phase AC motor and a power converter, the control apparatus includes an ECU. The ECU is configured to determine whether a rotation speed of the three-phase AC motor is equal to or less than a predetermined threshold and whether a stopping operation of the vehicle is performed, to determine that the vehicle stops when the rotation speed is equal to or less than the predetermined threshold and the stopping operation is performed, to determine whether the vehicle skids, and to switch a state of the power converter to a state where all on one side of the first and second switching elements are turned off and at least one on the other side of the first and second switching elements is turned on when the ECU determines that the vehicle stops and that the vehicle does not skid.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: February 6, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshitaka Niimi, Wanleng Ang, Masaki Okamura, Shintaro Tsujii, Keisuke Morisaki, Hideaki Yaguchi
  • Patent number: 9866107
    Abstract: A control system includes an electronic control unit. The electronic control unit is configured to execute three-phase ON control such that two transistors connected in parallel to the first transistor are switched ON when a condition i) is satisfied, The first transistor is one of the transistor of the six transistors and in which the short-circuit fault has occurred. The condition i) is that a recovery loss of a first diode in which a reverse recovery current is generated is estimated to be smaller than a recovery tolerance.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: January 9, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Etsushi Taguchi
  • Patent number: 9787243
    Abstract: A controller for a brushless direct-current motor having an upstream converter, which has a half-bridge having a pair of switching means for each phase winding of the motor, includes a measuring device or has a signal connection to a measuring device. The measuring device is associated with a half-bridge and by means of the measuring device, the induced voltage, the counterelectromotive force of a phase winding, can be detected for rotor position detection in the current-free state, for which purpose the controller, in an operating mode that causes the braking and in which the switching means cause a short circuit of the phase windings, briefly opens the switching means associated with the measuring device in order to determine a rotor motion.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: October 10, 2017
    Assignee: MAGNA POWERTRAIN BAD HOMBURG GMBH
    Inventor: Markus Schüssler
  • Patent number: 9647598
    Abstract: A method for electrically connecting a converter to an electrical machine supplied with current by the converter by closing a separate electrical connection between the converter and the machine. The connection includes multiple phases. In order to close the electrical connection without causing undue wear to the material, at least two phases of the connection are closed at different times.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: May 9, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventor: Thorsten Stuetzle
  • Patent number: 9517671
    Abstract: A vibroisolating device (1) comprises a substantially elastomeric core (2) configured to be connected with a first displaceable object (3) and provide with an opening (21) configured to be connected with a second displaceable object (4). In order to obtain a nonlinear force vs. displacement characteristic of the device, substantially symmetrical around a certain and adjustable nonzero displacement value, the device (1) comprises at least one Belleville spring (5) disposed on the vibration transmitting path between said first displaceable object (3) and said second displaceable object (4), which is at least partially embedded in the volume of said substantially elastomeric core (2) and surrounds said opening (21). In particular the spring (5) is preloaded while said vibroisolating device (1) is in vibrations equilibrium position. The invention also relates to a motor vehicle suspension, in particular an adjustable active suspension system, comprising such a vibroisolating device.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: December 13, 2016
    Assignee: Beijing West Industries Co, Ltd.
    Inventors: Witold Palka, Tomasz Szostek, Tomasz Lukasik
  • Patent number: 9440540
    Abstract: An electric vehicle includes an electric motor outputting regenerative torque to a drive shaft connected to an axle shaft, a hydraulic brake providing braking force for the vehicle, and an electronic control unit. The electronic control unit is configured to execute a regeneration coordination switch in which at least part of the regenerative torque from the electric motor is gradually switched to the braking force from the hydraulic brake. The electronic control unit is configured to execute a vibration suppression control that restrains vibration of the vehicle. The electronic control unit is configured to increase frequency of execution of the vibration suppression control when the regeneration coordination switch is performed, as compared to frequency of execution of the vibration suppression control when the regeneration coordination switch is not being performed.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: September 13, 2016
    Assignees: Toyota Jidosha Kabushiki Kaisha, Fuji Jukogyo Kabushiki Kaisha
    Inventors: Masaya Yamamoto, Itaru Seta
  • Patent number: 9435864
    Abstract: The present invention relates to the technical field of motor control, and discloses an apparatus for measuring excitation parameters of an induction motor and a method thereof. The method comprises: maintaining the induction motor static, and inputting a test current to a test phase of the induction motor; and calculating, based on a voltage of the test phase of the induction motor, a stator flux linkage of the test phase of the induction motor corresponding to a magnitude of the test current. The disclosure can conveniently and accurately measure excitation parameters of the induction motor.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: September 6, 2016
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Zhiguang Gao, Cheng Lu, Jianping Ying
  • Patent number: 9401673
    Abstract: In a synchronous rotary machine such as a synchronous motor, respective values of the number of pole pairs of the rotor and the number of stator slots are predetermined such as to enable drive currents to be passed through the stator windings which suppress specific varying electromagnetic forces that act on the rotor and produce vibration. The drive current of each phase of the motor consists of a fundamental-frequency sinusoidal waveform current having specific harmonic-frequency currents superimposed thereon, the harmonic-frequency currents having angular velocities which are appropriate, with respect to the angular variation velocities of the specific varying electromagnetic forces, for suppressing these forces.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: July 26, 2016
    Assignee: DENSO CORPORATION
    Inventor: Junichi Semura
  • Patent number: 9397594
    Abstract: A back electromotive force (BEMF) zero cross may be detected in a brushless direct current (BLDC) motor that is controlled by pulse width modulation (PWM). A phase input of the BLDC motor is tri-stated during PWM periods in which the phase input conducts motor drive current, and the tri-stating of the phase input is used to determine whether a BEMF zero cross has occurred in the BLDC motor.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: July 19, 2016
    Assignee: Texas Instruments Incorporated
    Inventor: Yisong Lu
  • Patent number: 9209737
    Abstract: A power converter includes an inverter, a contactor for connecting a battery to the inverter in order to supply DC power from the battery to the inverter and for disconnecting the battery from the inverter in order to stop an operation to supply the DC power from the battery to the inverter, a smoothing capacitor connected in parallel to the battery through the contactor, a discharge circuit that is provided with a discharge resistor and a switching device connected in series to the discharge resistor and is connected in parallel to the smoothing capacitor to discharge electric charge from the smoothing capacitor, a voltage measurement circuit, a voltage-dividing circuit for dividing the voltage across the terminals of the smoothing capacitor to generate a partial voltage to be input to the voltage measurement circuit and a control circuit of the switching device.
    Type: Grant
    Filed: July 4, 2012
    Date of Patent: December 8, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Seiji Funaba, Yasuo Noto, Masashige Tsuji
  • Patent number: 9120390
    Abstract: An apparatus for transferring energy using onboard power electronics comprises a first energy storage device configured to output a DC voltage and a DC bus coupled to the first energy storage device, the DC bus coupleable to a high-impedance voltage source. The apparatus also comprises a braking resistor coupled to the DC bus and to a control circuit, and a controller. The controller is configured to control the control circuit to cause energy on the DC bus to be dissipated through the braking resistor during a regenerative braking event, cause the first energy storage device to receive a charging energy from the high-impedance voltage source through the braking resistor during a charging event, and after a threshold value has been crossed, cause the first energy storage device to receive the charging energy from the high-impedance voltage source bypassing the braking resistor during the charging event.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: September 1, 2015
    Assignee: General Electric Company
    Inventors: Robert Dean King, Robert Louis Steigerwald
  • Patent number: 9024551
    Abstract: An integrated power converter includes first and second auxiliary switch modules, and one or more braking switch modules. The first auxiliary switch module is mounted at a first location of a laminated bus bar, and connects a first auxiliary lead with a first power layer and a second power layer of the bus bar. The second auxiliary switch module is mounted at a second location of the bus bar, and connects a second auxiliary lead with the first and second power layers. The braking switch modules are mounted at additional locations of the bus bar, adjacent to the first and second locations. Each braking switch module connects a braking lead with one of the power layers of the bus bar, and with a dual diode module or with the other power layer of the bus bar.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: May 5, 2015
    Assignee: General Electric Company
    Inventors: Alvaro Jorge Mari Curbelo, Henry Todd Young, Jason Daniel Kuttenkuler
  • Patent number: 9024550
    Abstract: For an electric motor used as a generator in an electric vehicle for dynamic braking, employing a dynamic reconfiguration-switching of motor windings upon the generator exceeding one of a maximum usable constraint of a first rechargeable battery in order to reduce a voltage constant of the electric motor thereby limiting one of a produced voltage and a produced power.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: May 5, 2015
    Assignee: International Business Machines Corporation
    Inventors: Tara Astigarraga, Allen K. Bates, Nhan X. Bui, Louie A. Dickens, Reed A. Hancock, Stephen L. Schwartz, Michael E. Starling, Daniel J. Winarski
  • Publication number: 20150108928
    Abstract: A motor controller for an electric motor having a stator and a rotor. The motor controller includes a power input for receiving AC power from a power source; a control input for receiving a control signal from a control; and circuitry for switching power from the power source to the electric motor in response to the control signal. The circuitry is operable to: apply a braking waveform to the stator while the rotor is rotating; monitor a reactive power of the stator; detect an increase in the reactive power of the stator to determine the rotor has substantially stopped rotating; and remove the braking waveform from the stator in response to detecting the increase in the reactive power.
    Type: Application
    Filed: December 29, 2014
    Publication date: April 23, 2015
    Inventors: Darko Marcetic, Thomas J. Sheahan
  • Patent number: 9013124
    Abstract: A method is provided. A command to correspond to a target speed of a motor is received. A rotational speed of the motor is measured, and a brake-to-off ratio for a braking interval is calculated based at least in part on the rotation speed, the target speed, a braking parameter. An off state for an inverter that is coupled to motor is induced during an off portion of the braking interval, and a brake signal is applied to the inverter during a braking portion of the braking interval.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: April 21, 2015
    Assignee: Texas Instruments Incorporated
    Inventors: Kazunori Itoh, Yasushi Kitamura
  • Publication number: 20150097499
    Abstract: A control system for a thrust reverser with a movable cowl includes an electromechanical actuator to actuate the movable cowl, an electric drive unit (M) driving the actuator, and a power control unit capable of controlling the electric drive unit (M). The power control unit moves the movable cowl to a closed position and/or to a deployed position. In particular, the control system includes an electronic circuit for electric braking capable of braking the electric drive unit (M), in case of overspeed of the drive unit when the movable cowl is moved to the closed position and/or to the deployed position.
    Type: Application
    Filed: October 29, 2014
    Publication date: April 9, 2015
    Inventors: Hakim MAALIOUNE, Alain Nourrisson
  • Patent number: 8988016
    Abstract: A control method comprises determining wheel creep of a wheel operably coupled to a traction motor and limiting a rate of change of an excitation frequency applied to the traction motor to drive the wheel, based on the determined wheel creep. According to one aspect, the rate of change of the excitation frequency is limited if the wheel creep exceeds a wheel creep threshold.
    Type: Grant
    Filed: October 1, 2012
    Date of Patent: March 24, 2015
    Assignee: General Electric Company
    Inventors: Jeffrey Louis Daigle, Jeremy McGarry
  • Patent number: 8981685
    Abstract: The disclosure describes, in one aspect, a system for a machine having an electric drive configuration. The system includes an electric motor associated with at least one wheel and adapted to provide retarding torque to the wheel, and a controller configured to determine a power measurement of a retarding grid and control the retarding torque to the at least one wheel during retarding as a function of the power measurement.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: March 17, 2015
    Assignee: Caterpillar Inc.
    Inventors: Brett M. Nee, Joshua M. Williams, Benjamin P. Gottemoller, Srikar Thaduvayi
  • Patent number: 8965630
    Abstract: Electronic control systems and related control methods for controlling electric auxiliary motors for performing work, such as electric deck motors for mower blades. The apparatus is shown in use with a vehicle that includes a mowing deck. Features of the control systems allow for safe and efficient use of the vehicle.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: February 24, 2015
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Christopher K. Wyatt, Ivan E. Fox
  • Patent number: 8952648
    Abstract: A method of braking a washing machine from an operational speed to a zero speed is provided (as well as a washing machine incorporating the method) for a washing machine driven by one of a synchronous or asynchronous motor. Upon receipt of a stop signal, collapsing the motor rotating magnetic fields are collapsed for a predefined time period. After the predefined time period, DC braking voltage is applied to the motor stator windings at a controlled ramp-up rate to a fixed amplitude to generate a controlled ramped braking torque on the motor. The braking torque is applied until the motor is stopped.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: February 10, 2015
    Assignee: General Electric Company
    Inventors: Richard Dean Suel, II, John Steven Holmes, Meher Prasadu Kollipara, Mariano Pablo Filippa, Shyam Sunder Ramamurthy
  • Patent number: 8947028
    Abstract: Disclosed are a method and system for detecting a fault of a parallel coil type permanent magnet motor. This method includes driving a parallel coil type motor on the basis of a pre-defined current reference value, detecting a phase current vector of the motor, and calculating a current compensation value for removing a negative sequence component of the motor on the basis of the phase current vector.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: February 3, 2015
    Assignee: Korea Electronics Technology Institute
    Inventors: Bon Gwan Gu, In Soung Jung, Jun Hyuk Choi, Joon Sung Park, Jin Hong Kim
  • Patent number: 8946652
    Abstract: Provided is a sample positioning technology wherein micro-vibrations of a top table on which a sample is placed are suppressed such that the quality of an image to be observed or the precision of a measured dimension value can be improved. A sample positioning apparatus according to the present invention is provided with an active brake for stopping the top table, an inner frame which surrounds the active brake, an outer frame which surrounds the inner frame, and actuators for driving the active brake. The actuators, after driving the active brake to stop the top table with respect to a stage, press the outer frame to adjust the position of the top table.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: February 3, 2015
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Motohiro Takahashi, Hironori Ogawa, Nobuo Shibata, Masaki Mizuochi, Shuichi Nakagawa, Hiroshi Tsuji
  • Patent number: 8941338
    Abstract: An electric braking device for printing material processing machines includes at least one electric drive to be braked that is supplied by a power converter in motor operation and is braked by the power converter in generator operation. A control unit switches on a redundant electric braking device in the case of a failure of the power converter by using a switch. The braking device has at least two braking stages, an additional switch for actuation in at least two stages, and at least one brake resistor. In the circuit of the redundant electric braking device, a braking current is measured and the measured value is fed to a comparator for comparing the actual braking current to a desired braking current. A printing press having the braking device is also provided.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: January 27, 2015
    Assignee: Heidlelberger Druckmaschinen AG
    Inventors: Reiner Villhauer, Klaus-Dieter Kleibaumhueter, Josef Reiter, Andreas Schulz
  • Patent number: 8928260
    Abstract: A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: January 6, 2015
    Assignee: Caterpillar Inc.
    Inventors: Alexander Cameron Crosman, III, Joshua M. Williams
  • Patent number: 8922142
    Abstract: A motor controller for an electric motor having a stator and a rotor. The motor controller includes a power input for receiving AC power from a power source; a control input for receiving a control signal from a control; and circuitry for switching power from the power source to the electric motor in response to the control signal. The circuitry is operable to: apply a braking waveform to the stator while the rotor is rotating; monitor a reactive power of the stator; detect an increase in the reactive power of the stator to determine the rotor has substantially stopped rotating; and remove the braking waveform from the stator in response to detecting the increase in the reactive power.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: December 30, 2014
    Assignee: Nidec Motor Corporation
    Inventors: Darko Marcetic, Thomas J. Sheahan
  • Patent number: 8917038
    Abstract: A motor control device has a drive circuit that drives an electric motor with a battery as a power supply, a switch element that is provided between the battery and the drive circuit, the switch element supplying a current from the battery to the drive circuit when being turned on, the switch element cutting off the current from the battery to the drive circuit when being turned off, a rotation speed detector that detects a rotation speed of the electric motor, and a controller that operates the drive circuit to control the electric motor. The controller turns on the switch element when the rotation speed of the electric motor, which is detected by the rotation speed detector, is greater than or equal to a first predetermined value during stopping of the control of the electric motor.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: December 23, 2014
    Assignee: Omron Automotive Electronics Co., Ltd.
    Inventors: Takayuki Fukuoka, Yoshiki Yamagishi, Satoshi Kido, Yasutaka Shirota
  • Patent number: 8907601
    Abstract: A braking apparatus for a vehicle includes a permanent magnet synchronous motor including a rotor having a permanent magnet, and a stator capable of driving the rotor to rotate and configured to couple the rotor to each of at least a pair of wheels of the vehicle; a power accumulating portion that accumulates power to be supplied to the permanent magnet synchronous motor; a conversion control portion that converts the power of the power accumulating portion to excite the stator and control the rotation of the rotor; and an in-phase excitation control portion that applies exciting brake to the wheel by exciting the stator by supplying power in the same phase as the excitation with respect to the stator in the direction of rotation of the rotor according to the control performed by the conversion control portion, wherein the wheel is stopped by the exciting brake.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: December 9, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Akemi Okawa, Masanori Mori
  • Patent number: 8890448
    Abstract: The invention relates to a braking apparatus, an electric drive and an elevator system. The braking apparatus comprises an apparatus for dynamic braking, for braking an electric machine with dynamic braking, an input for the control signal of the braking apparatus, and also a controller, for controlling the apparatus for dynamic braking as a response to the aforementioned control signal of the braking apparatus.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: November 18, 2014
    Assignee: Kone Corporation
    Inventors: Esa Putkinen, Antti Kallioniemi, Juha-Matti Nikander, Paavo Merilinna, Risto Komulainen
  • Patent number: 8884557
    Abstract: A method for operating a mains-operated electric motor for a power tool includes connecting a first side of an electric motor to a first mains and connecting a second side of the electric motor to a second mains using first and second switches, respectively, in particular semiconductor switches, and monitoring the operational reliability of the switches using an electronic controller for operating safety.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: November 11, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Hans Hermann Rottmerhusen