Braking Patents (Class 318/362)
  • Patent number: 10377363
    Abstract: A parking brake for a vehicle includes an electric brake motor, a transmission, and a brake piston. The transmission transfers a drive movement of the motor to the brake piston. The transmission has a transmission efficiency that steadily increases as a temperature in the transmission rises.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: August 13, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Helmut Wolff, Simon Hauber
  • Patent number: 10345347
    Abstract: The invention relates to a method and a device for detecting fault currents in a regulated DC intermediate circuit having an active power factor correction.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: July 9, 2019
    Assignee: ebm-papst Mulfingen GmbH & Co. KG
    Inventors: Guenther Haas, Helmut Lipp
  • Patent number: 10256740
    Abstract: A power conversion apparatus includes a power converter, a voltage detector, a determiner, and a drive controller. The power converter is configured to convert DC power input from an electric generation apparatus into AC power. The voltage detector is configured to detect a DC voltage input into the power converter. The determiner is configured to determine an output power command or an output current command based on whether the output power command or the output current command has a first level that is correlated in advance with a second level of the DC voltage detected by the voltage detector. The drive controller is configured to control the power converter based on the output power command or the output current command determined by the determiner.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: April 9, 2019
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Hirotaka Toujinbara, Yukari Takagi, Masaya Yoshitomi
  • Patent number: 10081340
    Abstract: A steering brake locking system for a vehicle, such as an agricultural tractor, has at least first and second adjacent steering brake pedals, and a locking pin arranged to selectively lock the pedals together. The locking pin and at least a portion of the first and second pedals are formed from a conductive material, such that an electrically conductive path is formed between the first and second pedals through the locking pin when the pin is used to lock the pedals together. The locking status of the pedals can be determined by measuring the electrical conductivity between the first and second pedals.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: September 25, 2018
    Assignee: AGCO International GmbH
    Inventor: Dominique Szymczak
  • Patent number: 10070734
    Abstract: The invention provides an anti-pinch device for an electric product. The electric product comprises a fixing seat, a moving part which is movable to or away from the fixing seat, and a driving mechanism for driving the movement of the moving part relative to the fixing seat. The anti-pinch device comprises a safety strip and a controller electrically connected to the safety strip for controlling the operating state of the driving mechanism. An anomaly monitoring circuit is disposed in the safety strip, and the anomaly monitoring circuit comprises a power supply, a resistance and a normally open switch connected in series, the normally open switch is closable when the safety strip is pressed. The controller is connected to the anomaly monitoring circuit by electrical signals. the safety strip is fixedly disposed on the moving part or fixing seat and located between them.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: September 11, 2018
    Assignee: Taicang Shiyuan Globle Source Co., Ltd
    Inventor: Chun-Sheng Lin
  • Patent number: 10027259
    Abstract: A braking apparatus according to one embodiment of the present invention is a braking apparatus for use in an electrical motor, and comprises a braking unit which locks the electrical motor in position, a voltage detection unit which detects a voltage applied to the braking unit, and an observing unit which recognizes a voltage variation pattern and, based on the voltage variation pattern, observes the released and actuated states of the braking unit.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: July 17, 2018
    Assignee: FANUC CORPORATION
    Inventors: Katsuya Ono, Takeshi Tamaki
  • Patent number: 9938759
    Abstract: One embodiment of the present invention provides a control device of a vehicle opening-closing member that includes a vehicle state determination unit that determines a traveling state of the vehicle based on a signal indicating a traveling state of a vehicle; an open/close state determination unit that determines an opening/opened state of the opening-closing member based on a signal indicating an opening/opened state of an opening-closing member provided to the vehicle; and a control unit that outputs a control signal for stopping an opening motion of the opening-closing member when it is determined by the vehicle state determination unit that the vehicle is in a state of traveling and when it is determined by the open/close state determination unit that the vehicle opening-closing member is in an opening/opened state.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: April 10, 2018
    Assignees: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Urase, Takeshi Nishikibe, Toshiro Maeda, Eiji Itami, Takeshi Katsuda, Masahiko Itoh, Yoshinori Hitomi
  • Patent number: 9908433
    Abstract: A method for controlling a braking torque of a drive system and for braking a vehicle includes in a first state connecting phase connections of a synchronous machine to one another by a changeover apparatus and short circuiting the phase connections such that a first braking torque develops at the synchronous machine. In a second state the phase connections are connected to one another by the changeover apparatus and to a resistance, such that a second braking torque develops at the synchronous machine. The changeover apparatus periodically switches between the first and second states at a switching frequency of 10 Hz or higher to produce a pre-settable braking torque at the synchronous machine, with the changeover between the first state and the second state being controlled by a timing element in an unregulated manner.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: March 6, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Gerald Amler, Hans Bergner
  • Patent number: 9878696
    Abstract: In a method for actuating a parking brake in a vehicle, a clamping force is generated by an electromechanical braking device comprising a brake motor. The motor voltage of the brake motor is determined on the basis of the control-unit input voltage of a closed-loop or open-loop control unit.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: January 30, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Frank Baehrle-Miller, Lars Roters, Tobias Putzer, Matthieu Weinum
  • Patent number: 9749486
    Abstract: A sheet feeder is provided. The sheet feeder includes a roller to feed a sheet, a motor to rotate the roller, and a motor controller to control rotation of the motor by a feedback control. The motor controller detects a condition of the sheet based on a value acquired in the feedback control at the time a load is applied from the sheet to the roller, while performing a stop control to stop the roller at a designated stop position. The stop control is performed after the motor is rotated in a direction opposite to a direction of feed of the sheet.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: August 29, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventor: Eiki Yoshimizu
  • Patent number: 9654050
    Abstract: A power tool includes a housing, an electric motor mounted in the housing, and a switching device for reversing rotation direction of the motor. The switching device includes an actuator slidably secured to the housing and movable between first and second positions. The actuator includes a magnet. A first ferromagnetic member is attached to a first housing section so as to be within range of attraction force of the magnet when the actuator is in the first position and a second ferromagnetic member is attached to a second housing section so as to be within range of attraction force of the magnet when the actuator is in the second position. A hall sensor is attached to the housing so as to be proximate the magnet as the actuator is moved between first and second positions. Proximity of the magnet and hall sensor reverses the direction of rotation of the motor.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: May 16, 2017
    Assignee: Ingersoll-Rand Company
    Inventors: Christopher Anthony Kokinelis, Randolph Robert Ruetsch, Daniel Jay Becker
  • Patent number: 9444373
    Abstract: A motor control device includes a rectifier, a smoothing capacitor provided to a DC link, an inverter that power-converts DC power of the DC link and AC power of a motor side, an initial charging unit that charges the smoothing capacitor before motor driving start, a current detection unit that detects an AC current detection value of an input side of the rectifier, a current conversion unit that converts the detection value into a value corresponding to a DC link current, a current integration unit that outputs an integration value obtained by integrating the conversion value, an alarm output unit that outputs an alarm when the integration value is equal to or more than a first threshold value, a disconnecting unit that disconnects the AC power to the rectifier in response, and a protective unit that commands the disconnecting unit to disconnect the AC power when the alarm is output.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: September 13, 2016
    Assignee: Fanuc Corporation
    Inventor: Kenta Yamamoto
  • Patent number: 9409302
    Abstract: Razor handles are provided for razors having a battery-powered functionality. Methods of manufacturing such handles are also provided. In one implementation, the handle includes a unitary grip portion constructed to receive a razor head at one end thereof, and a battery cover, mounted on the grip portion. The razor handle allowing for varying vibration settings.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: August 9, 2016
    Assignee: The Gillette Company
    Inventors: Fred Schnak, Luis Burrel, Stefan Rehbein, Gerrit Roenneberg, Uwe Schaaf
  • Patent number: 9139292
    Abstract: Systems and methods for dynamically stable braking are disclosed. A first electromechanical brake actuator controller may be placed in communication with a second electromechanical brake actuator controller, wherein each of the first electromechanical brake actuator controller and second electromechanical brake actuator controller are in communication with electromechanical brake actuators that are associated with the same wheel. The first electromechanical brake actuator controller and second electromechanical brake actuator controllers may then communicate electromechanical brake actuator status information and take corrective measures in accordance with the status information.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: September 22, 2015
    Assignee: Goodrich Corporation
    Inventor: Eric D. Cahill
  • Patent number: 9035591
    Abstract: Disclosed is a control method of an electronic parking brake system, which variably controls the duty of voltage applied to a motor upon release of the electronic parking brake system. The control method includes controlling voltage applied to a motor to a first duty ratio upon release of the electronic parking brake system, controlling the voltage applied to the motor to a second duty ratio greater than the first duty ratio if locking of the motor occurs and the motor is not operated, and controlling the voltage applied to the motor to the first duty ratio if locking of the motor is released and the motor begins to operate, after the control of voltage to the second duty ratio.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: May 19, 2015
    Assignee: Mando Corporation
    Inventor: Gyung Hun Sim
  • 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
  • Patent number: 9018792
    Abstract: An arrangement for operating a rail vehicle includes a DC voltage intermediate circuit which is connected to an energy supply network, at least one traction inverter which is connected at its DC voltage side to the DC voltage intermediate circuit and at its AC voltage side which is connected one or more traction motors of the rail vehicle. An auxiliary system inverter is connected at its DC voltage side to the DC voltage intermediate circuit and is connected at its AC voltage side to a primary side of an auxiliary system transformer. Auxiliary systems are connected to a secondary side of the auxiliary system transformer via an auxiliary line. Electrical energy generated by an electrical energy supply unit is transferred via the auxiliary line, the auxiliary system transformer and the auxiliary system inverter into the DC voltage intermediate circuit for operation of the at least one traction motor.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: April 28, 2015
    Assignee: Bombardier Transportation GmbH
    Inventor: Ludwig Still
  • Patent number: 9010454
    Abstract: The invention relates to a portable, handheld work apparatus such as a trimmer, a cut-off machine, a chain saw or the like, having a motor (5, 33) to drive a rotating, exchangeable work tool (13). A control unit (15) serves to control the operation of the motor (5, 33). The control unit (15) determines the rotational speed (n) and/or the power (P) of the motor (5, 33). According to the invention, the motor (5, 33) can be operated in a first operating mode (I) with reduced rotational speed (n0) and/or power (P0) and in at least a second operating mode (II) with an increased rotational speed (n1) and/or power (P1). In dependence on a release signal, the control uses exclusively the first operating mode (I) for a limited operation and the second operating mode (II) for an expanded operation.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: April 21, 2015
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Andreas Neubauer, Tim Gegg
  • Publication number: 20150077024
    Abstract: A drive system includes a line assembly configured to connect a power converter to an electric motor which has a brake and an encoder. The line assembly has at least two power lines and only two brake lines exclusively to provide a data transfer between the power converter and the electric motor and to transfer energy to the encoder. The power converter applies a first supply voltage of a first polarity and a second supply voltage of a second polarity opposite to the first polarity to the brake lines for supplying the brake and the encoder. The electric motor supplies the encoder with the respective supply voltage independently of its polarity and the brake with the respective supply voltage depending on its polarity.
    Type: Application
    Filed: September 17, 2014
    Publication date: March 19, 2015
    Inventor: Andreas Kuhn
  • 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
  • Publication number: 20150054430
    Abstract: A method for limiting peak currents, particularly depending on a charge quantity provided by a voltage source, and the maximum pitch of the current flanks of an electric motor for an electrohydraulic motor vehicle brake system, particularly a pump motor, controlled by pulse width modulation, wherein a change to an actual duty cycle of the PWM is made by a first duty cycle of the PWM on a second duty cycle at runtime, wherein the change takes place according to a positive or negative pitch value calculated and/or changeable at runtime. The invention further describes an electronic circuit arrangement for the implementation of a method for limiting peak currents and the maximum pitch of current flanks.
    Type: Application
    Filed: March 5, 2013
    Publication date: February 26, 2015
    Inventors: Micha Heinz, Frank Michel
  • 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: 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: 8907599
    Abstract: An electric brake device is provided for electronically controlled synchronous motors which are supplied with voltage by way of a converter. The synchronous motor contains a winding center point and that the winding center point is connected by way of an electric resistor and a switch to a ground point of the converter and that the phases of the converter that are connected to the ground point contain in each case a free-wheeling diode.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: December 9, 2014
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Kubilay Koral, Michael Krueger
  • Patent number: 8890466
    Abstract: A circuit arrangement, especially for supplying an electromagnetic holding brake with a clocked supply voltage, includes a module for controlled provision of a clocked supply voltage for free-wheeling operation of the holding brake. The module has a switching unit for switching off the supply voltage for braking operation. A free-wheeling diode and a suppressor diode are connected in parallel to an inductance of the holding brake, with the free-wheeling diode being effective in free-wheeling operation only and the suppressor diode being effective in braking operation only.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: November 18, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernhard Hild, Christian Maul, Günter Schwesig, Hanno Walders
  • 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
  • Patent number: 8886433
    Abstract: An electric braking control apparatus for controlling an electric braking apparatus which includes a brake pad, a motor which generates a rotational torque, and a rotation/linear motion conversion mechanism which causes the brake pad to generate a pressing force based on the torque. The braking control apparatus includes an inverter which converts and outputs an electric current supplied from a power supply to the motor, and a microcomputer that receives power from the power supply, detects the value of a voltage applied from the power supply to the inverter, and controls the electric current output from the inverter depending on a result of the detection.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: November 11, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Yasufumi Konishi, Toshiyuki Innami, Satoru Kuragaki, Takafumi Suzuki
  • Patent number: 8872458
    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 put into an on state, the switch element cutting off the current from the battery to the drive circuit when being put into an off state, a voltage detector that detects a voltage at the drive circuit, and a controller that operates the drive circuit to control the electric motor. The controller turns on the switch element when the voltage at the drive circuit, which is detected by the voltage 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: October 28, 2014
    Assignee: Omron Automotive Electronics Co., Ltd.
    Inventors: Takayuki Fukuoka, Yoshiki Yamagishi, Satoshi Kido, Yasutaka Shirota
  • Publication number: 20140300987
    Abstract: A motor drive device has a spindle motor driver adapted to drive a spindle motor. the spindle motor driver includes lower side NMOSFETs, one for each phase, which connect and disconnect terminals, one for each phase, of the spindle motor to and from a ground terminal; a controller adapted to generate a switch control signal and a brake control signal; lower side pre-drivers, one for each phase, connected between an application terminal of an internal power supply voltage and the ground terminal and adapted to generate lower side gate signals, one for each phase, in accordance with the switch control signal to output the lower side gate signals to the lower side NMOSFETs, one for each phase; and a brake unit adapted to pull up to the internal power supply voltage all the lower side gate signals, one for each phase, in accordance with the brake control signal.
    Type: Application
    Filed: April 5, 2013
    Publication date: October 9, 2014
    Applicant: ROHM CO., LTD.
    Inventor: ROHM CO., LTD.
  • Patent number: 8847524
    Abstract: Braking current generated by an electrical motor on mining equipment during a retard interval is switched through one or more grid resistors that are liquid cooled. Under low ambient temperatures, a heating current can be switched through the grid resistors when the electrical motor is not operating in a retard interval. An integrated cooling system can be used to cool grid resistors and power modules. Heat dissipated by the grid resistors and the power modules can be circulated through auxiliary heating loops to heat portions of the mining equipment under low ambient temperatures. Multiple liquid-cooled power modules, liquid-cooled grid resistors, auxiliary heating loops, control modules, radiators, and pumps can be coupled by a liquid distribution system with various combinations of parallel and serial branches. Temperature, pressure, and flow rate in each branch can be independently controlled. Operation of the integrated cooling system can be controlled by a computational system.
    Type: Grant
    Filed: September 29, 2011
    Date of Patent: September 30, 2014
    Assignee: Siemens Industry, Inc.
    Inventor: Joy Mazumdar
  • Patent number: 8847523
    Abstract: An electronic drive includes an electro-mechanical brake associated with a direct-current motor. A first valve or diode connects one of the terminals of the direct-current motor with the first electrical terminal of the brake in a forward direction. A second valve or diode connects the other terminal of the direct-current motor with the first electrical terminal of the brake. A second electrical terminal of the brake is at least indirectly connected with a reference voltage.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: September 30, 2014
    Assignee: Aktiebolaget SLF
    Inventors: Remy Bringold, Klaus Pfeffer
  • Patent number: 8823298
    Abstract: A method of operating a laundry treating appliance to control a rotational speed of a drum to move the laundry within the drum according to a predetermined category of movement.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: September 2, 2014
    Assignee: Whirlpool Corporation
    Inventors: Biao He, Qiang Mei, Fabio E. Rosa
  • Patent number: 8818669
    Abstract: A regenerative braking method for a motor vehicle, in which the regenerative braking action is applied progressively, a rate of application of the braking action being dependent on a speed of the motor vehicle.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: August 26, 2014
    Assignee: Renault S.A.S.
    Inventor: Gilles Enjolras
  • Publication number: 20140152201
    Abstract: An electric motor system having a power supply, an electric motor connected to the power supply, an object driven by the motor having a range of motion and a substantially neutral position within the range of motion, a power sensor configured to sense power from the power supply, a position sensor configured to sense position of the object in at least a portion of the range of motion, an energy storage, a controller connected to the power supply and the energy storage, wherein the controller is configured to brake the motor as a function of the position sensor, the neutral position and the power sensor.
    Type: Application
    Filed: July 26, 2011
    Publication date: June 5, 2014
    Applicant: Moog Inc.
    Inventors: Michael H. Shriver, John W. Stevens
  • Patent number: 8742703
    Abstract: The invention relates to a blower apparatus (1) having a blower wheel (4) for generating a blower air flow (50). The blower wheel (4) is arranged in a housing (2), wherein the blower wheel is driven by an electric drive motor (8). A blower tube (6) via which the generated blower air flow (50) is guided connects at an outlet (5). A control unit (17) is provided for controlling the rotational speed of the electric drive motor. For a quick reduction of the blower air flow (50), it is provided that the control unit (17) supports the deceleration of the drive motor (8) through a braking current (I).
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: June 3, 2014
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Andreas Binder, Arne Untermann, René Wichert
  • Patent number: 8736204
    Abstract: Apparatus for transferring power between an electricity network (UP) operating on alternating-current electricity and a multiphase electric machine (M2, M3), which apparatus comprises low-voltage power cells (CS, C11 . . . CN6) operating on a cascade principle, which power cells comprise a single-phase output connector (OUT), and at least one transformer (TA, T1 . . . TN), comprising for each power cell connected to it a single-phase or multiphase winding dedicated to the specific power cell, which transformer comprises at least one additional winding (WA, WB1 . . . WBN) connected to the same magnetic circuit as the other windings for the purpose of at least one auxiliary circuit, which can be connected to the aforementioned additional winding.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: May 27, 2014
    Assignee: Vacon Oyj
    Inventors: Nicklas Södö, Risto Komulainen
  • Patent number: 8736202
    Abstract: In a drive control circuit of a linear vibration motor, the drive signal generating unit generates a drive signal whose phase is opposite to that of the drive signal generated during the motor running, after the running of the linear vibration motor has terminated; this drive signal of opposite phase includes a high impedance period during which the driver unit is controlled to a high impedance state. An induced voltage detector detects an induced voltage occurring in the coil. A comparator has a function as a hysteresis comparator in which the output level does not vary in a predetermined dead band, and the comparator outputs a high-level signal or a low-level signal during the high impedance period. When an in-phase signal is consecutively outputted from the comparator during the consecutive high-impedance periods, the drive signal generating unit determines that the linear vibration motor has come to a stop.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: May 27, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Tsutomu Murata
  • Patent number: 8736208
    Abstract: When one of six FETs has short-circuit faulted, a controllable region identification unit stops driving of an electric motor, and then performs processes for determining whether a short-circuit fault has occurred, and when a short-circuit fault has occurred, for identifying the position of the FET that has short-circuit faulted based on phase voltages (induced voltages) VU, VV, and VW of phases. When the position of the FET that has short-circuit faulted is identified, the controllable region identification unit performs a controllable region identification process. In detail, the controllable region identification unit identifies a “possible region,” an “indeterminate region,” and a “impossible region” based on phase voltages VU, VV, and VW of the phases.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: May 27, 2014
    Assignee: Jtekt Corporation
    Inventors: Shigekazu Okumura, Fumihiko Satou, Hiroshi Sumasu
  • Patent number: 8736205
    Abstract: A switching device and method are disclosed for terminating a braking process of a three-phase AC motor. The braking process of the AC motor is performed by way of a first and second thyristor. During the braking process of the AC motor, in a first step the first thyristor is actuated in such a way that a braking current is fed to the AC motor, and therefore a torque which brakes the AC motor is produced. In a second step the second thyristor is actuated in such a way that, when the first thyristor is quenched, the braking current is taken on by the second thyristor and the braking torque is maintained. The two steps are repeated during the braking process; wherein the second step is suppressed during the braking process after a last actuation of the first thyristor.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: May 27, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dirk Hertz, Johann Seitz, Stefan Zitzler
  • Patent number: 8704466
    Abstract: The method is capable of equalizing time lengths of stopping a motor at load-holding stop positions of respective phases so as to average amounts of heat generation of phase coils. The method for drive-controlling electric machinery, in which a multiphase motor is used as a driving source of an assist mechanism, is performed by a control unit including a driving circuit for driving the multiphase motor. The method is characterized in that the control unit controls to stop a rotor at a load-holding stop position, at which rotation of the rotor is stopped in a state where a motor coil is energized and the rotor is in a load-holding state, and that the load-holding stop position is angularly shifted an electric angle of 180/n (n is number of phases and an integer two or more) degrees, in a prescribed rotational direction, with respect to a previous load-holding stop position of the rotor.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: April 22, 2014
    Assignee: Shinano Kenshi Kabushiki Kaisha
    Inventor: Nobuchika Maruyama
  • Patent number: 8704468
    Abstract: An electrodynamic braking device for a universal motor is proposed, wherein during a braking operation a field winding is supplied from a network, and an armature is directly short-circuited, and a braking operation is carried out using a program of a controller of a control electronics system, whereby good braking is achieved with relatively low brush wear. Such an electrodynamic braking device is advantageously applied in a power tool equipped with a dangerous tool.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: April 22, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Hans Hermann Rottmerhusen
  • Patent number: 8692489
    Abstract: A control system for controlling an electrical device of a nacelle, the device having at least one element that is movable to a closed position and an open position. The control system includes at least one electromechanical member for actuating the movable element, a unit for electrically driving the electromechanical actuation member, and a controlling and monitoring unit for controlling the electrical drive unit so as to move the movable element to the closed and/or open position. The control system further includes a system for recovering braking power from the electrical drive unit during the movement of the movable element to the closed and/or open position.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: April 8, 2014
    Assignee: Aircelle
    Inventor: Hakim Maalioune
  • Patent number: 8664897
    Abstract: A motor drive apparatus includes a rectifier which converts AC power to DC power and DC power to AC power, an inverter which converts the DC power output by the rectifier to AC power and supplies the AC power to a motor, and which converts regenerative power from the motor to DC power and returns the DC power to the rectifier, a DC voltage detection unit which detects a DC output voltage of the rectifier, an AC voltage detection unit which detects an AC output voltage of the rectifier, a frequency calculation unit which calculates the frequency of the AC voltage; a storage unit which stores as a reference value the DC voltage at the start of the regenerative operation, and a power failure detection unit which determines the presence or absence of a power failure by using the DC voltage, the reference value, and the AC voltage frequency.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: March 4, 2014
    Assignee: Fanuc Corporation
    Inventors: Yasusuke Iwashita, Tadashi Okita, Masakazu Niwa
  • Patent number: 8604728
    Abstract: A system and method are provided for controlling a locomotive such that the braking effort is maintained at its optimal maximum level throughout the extended range. The method comprises detecting a first reduction in speed of the locomotive; energizing at least one solid state device connected across one or more grid resistors for a first predetermined amount of time to divert current away from the one or more grid resistors for the first predetermined amount of time; and de-energizing the solid state device after the first predetermined amount of time. The solid state device may be an Isolated Gate Bipolar Transistor (IGBT) and a plurality of solid state devices are energized, each solid state device being connected across a corresponding resistor grid.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: December 10, 2013
    Assignee: Trac Rail Inc.
    Inventors: Aldo Liberatore, Viktor Gvelesiani
  • Publication number: 20130307446
    Abstract: A braking apparatus for a three-phase brushless motor is provided in a motor-driven appliance, and includes a switching circuit having six switching elements and a brake control device. The brake control device executes two-phase short-circuit control in braking control in which a braking force is generated in the motor. In the two-phase short-circuit control, an on/off state of each of the switching elements is set in such a manner that two out of three conduction paths constituting one of a positive electrode side conduction path that connects three terminals of the motor and a positive electrode side of a direct current power source and a negative electrode side conduction path that connects the three terminals and a negative electrode side of the power source are in a conducting state and other of the three conduction paths is in a non-conducting state.
    Type: Application
    Filed: May 16, 2013
    Publication date: November 21, 2013
    Inventor: Yoshitaka ICHIKAWA
  • Patent number: 8587231
    Abstract: A power tool includes a housing, a brushless DC motor housed inside the housing, a power supply, a control unit, and an input unit such as a trigger switch actuated by a user. The control unit controls the commutation of the motor through a series of power switches coupled to the power supply. The control unit initiates electronic braking of the motor after occurrence of a condition in the input unit, such as trigger release or reduced speed, indicative of the power tool shut-down. A mechanism is provided to power the control unit for a predetermined amount of time after the detection of the condition from the input unit in order to complete the electronic braking of the motor.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: November 19, 2013
    Assignee: Black & Decker Inc.
    Inventor: Pradeep M. Pant
  • Patent number: 8587230
    Abstract: A power tool includes a brushless DC motor housed inside a tool housing, an input unit, and a control unit. The motor includes a rotor, a stator, and at least one sensor positioned to sense a state of the rotational position of the rotor inside the stator. A control unit controls commutation of the motor through a series of power switches coupled to the power supply. The control unit receives a current sensor state from the sensor and a user-selected speed from the input unit and determines whether the motor has reversed direction using the user-selected speed and the current sensor state. The control unit disables commutation of the motor if the motor has reversed direction until a proper current sensor state is received from the sensor.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: November 19, 2013
    Assignee: Black & Decker Inc.
    Inventors: Pradeep M. Pant, James Goble
  • Patent number: 8531718
    Abstract: An image forming device includes a power source unit, motors supplied with and driven by electric power from the power source unit, and a control device for controlling the motors' operations. A CPU in the control device monitors presence/absence of power supply from the power source unit. When power is cut off during image forming, the CPU causes regenerative braking of the motors. The regenerated power is voltage-converted by a second DC-DC converter in the power source unit and supplied to the control device for continuously driving the CPU, which in turn backs up operating information. This eliminates inconsistency between the actual life status and the backed-up information when power is off, with no need of frequent backup during image forming. It is thus possible to provide the image forming device which can reliably manage operating information even if power supply to the motors is stopped during printing.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: September 10, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kunio Furukawa, Mikiyuki Aoki
  • Patent number: 8508170
    Abstract: A driving device for a hatch in a vehicle, with a housing tube connected to a base part or to a movable structural component part, a protective tube connected to the movable structural component part or to the base part, a spindle drive having a threaded spindle and a spindle nut arranged on the threaded spindle by which the housing tube and the protective tube are movable axially relative to one another. A rotary drive drives the spindle drive in rotation includes at least one electric motor. The driving device has a safety circuit that causes a braking effect on the rotary drive when the rotary drive is deactivated and when extraneous forces are introduced into the driving device from the outside.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: August 13, 2013
    Assignee: Stabilus GmbH
    Inventor: Marian Bochen