Speed Or Rate-of-movement Patents (Class 318/461)
  • Patent number: 10370886
    Abstract: A swing door actuation system for moving a door about a pivot axis between open closed positions relative to a vehicle body. The system includes a power swing door actuator having a housing connectable to one of the swing door and the vehicle body, an extensible member that moves relative to the housing, and connects to the other of the swing door and the vehicle body, a motor connected to a gear train, and a normally engaged clutch. The motor is operatively connected to a clutch input end through the gear train. The output end is operatively connected to the extensible member. The clutch is disengageable to disconnect the motor from the extensible member. The clutch has a slip torque that is sufficiently high to prevent movement of the door when the door is exposed to less than a selected external torque and the motor is stopped.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: August 6, 2019
    Assignee: MAGNA CLOSURES INC.
    Inventors: Joseph Felix Scheuring, Jube Leonard, Dan Cosmin, Luciano Boin
  • Patent number: 10374528
    Abstract: A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: August 6, 2019
    Assignee: Seagate Technology LLC
    Inventors: Binh Kim Lieu, Mark Lowell Elliott, Raye A. Sosseh
  • Patent number: 10291169
    Abstract: A high-efficiency control system and method is presented. The system can feature a gate drive circuit, a floating charge pump and pump circuitry, and a bootstrap capacitor circuit having a floating ground. The floating charge pump features a ground electrically coupled to a load. The bootstrap circuit can feature a floating ground, with a floating voltage being carried across the bootstrap circuit and delivered to the gate drive circuit to produce an indefinite on-time for switching a high-side of a power supply to the load.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: May 14, 2019
    Assignee: METROPOLITAN INDUSTRIES, INC.
    Inventors: John Kochan, Jr., James Andrew Nimmer, John Brian Dempster
  • Patent number: 10156612
    Abstract: Method for detecting short-circuits in a coil in an electric machine, includes: a) arranging a coil in an air gap between the rotor and stator; c) recording signal curves generated by the coil; d) determining zero crossings of the curve and storing the times thereof; e) determining zero crossings of the curve corrected by an offset c, identifying a pair of immediately consecutive zero crossings, the time separation of which is longer than the minimum duration; f) in no pair is identified, repeating step e) until identified, wherein the offset c is varied from the zero point to a global extreme value of the curve; g) identifying at least one of the two stored times, which lies between and closest in time to the pair and; h) extracting two half-waves from the curve using times identified in step g), wherein each half-wave corresponds to half a revolution of the rotor.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: December 18, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventors: Oliver Schönfelder, Dagmar Thien
  • Patent number: 10128782
    Abstract: Various embodiments include a variable frequency drive motor control apparatus. The apparatus includes a main controller having a first interface. A motor controller is coupled to and controls an electric motor, the motor controller further coupled to the main controller. A network switch is coupled to the main controller, the motor controller, and a remote controller over respective digital connections. The remote controller has a second interface. The network switches data between the first interface, the second interface, and the motor controller. A network coupler is coupled between a variable frequency drive controller and the motor controller.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: November 13, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Warren Neil Rattan, Charles Edward Neal, III, James Douglas Funkhouser, Derek Williams, Gary Lee Cline, Derek James Abel, Troy Dale Bachman
  • Patent number: 10004162
    Abstract: A rack-based information handling system (IHS) includes a rack having a modular structure that supports insertion of different numbers and sizes of information technology (IT) gear to create one or more IT nodes. A fan bay module is attached to the rack and supports insertion of multiple different fan configurations in more than one fan receptacle. At least one fan is inserted within corresponding at least one fan receptacle of the fan bay module to conform to at least a first fan configuration. A block controller is configurable to control each of the different fan configurations and which, in response to detecting the first fan configuration of the at least one fan inserted within the fan bay module, activates a corresponding first control algorithm that enables the detected first fan configuration to be utilized to provide rack-level cooling for one or more of the IT nodes inserted within the rack.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: June 19, 2018
    Assignee: Dell Products, L.P.
    Inventors: Edmond Bailey, Austin Michael Shelnutt, John R. Stuewe, Paul W. Vancil
  • Patent number: 9780700
    Abstract: A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: October 3, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Binh Kim Lieu, Mark Lowell Elliott, Raye A. Sosseh
  • Patent number: 9065369
    Abstract: A motor driving device comprises an inverter, a first arithmetic section, a driving command generating section and a PWM signal generating section. The first arithmetic section calculates a rotational speed and a magnetic pole electrical angle of a motor rotor based on information about a motor phase voltage and information about a motor phase current. The first arithmetic section includes a counter electromotive voltage arithmetic section, a converting section, a second arithmetic section, a third arithmetic section, and a fourth arithmetic section. The first arithmetic section outputs a sum of the magnetic pole phase error and the integrated value as the magnetic pole electrical angle.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: June 23, 2015
    Assignee: Shimadzu Corporation
    Inventor: Junichiro Kozaki
  • Patent number: 9035592
    Abstract: Disclosed herein are an apparatus and a method for controlling a speed of a motor. An apparatus for controlling a spaced of a motor according to an exemplary embodiment of the present invention includes: a PWM conversion unit detecting a hall sensor signal from a motor to output a pulse width modulated signal corresponding to the detected hall sensor signal; a duty detection unit detecting a duty value of the pulse width modulated signal output by the PWM conversion unit; an error calculation unit comparing a PWM duty input from the outside with a duty detected by the duty detection unit to obtain an error; and a speed control unit controlling a speed of a motor based on an error obtained by the error calculation unit.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: May 19, 2015
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Bon Young Gu
  • Patent number: 9035582
    Abstract: A motor driving apparatus includes an automatic gain control circuit on a signal path for transmitting a rotor-position detecting signal (hall voltage signal), and the automatic gain control circuit includes: an amplifier, configured to perform differential amplification on an input signal (step-angle hall current signal) to generate an output signal (amplified hall current signal); and a feedback control portion, configured to monitor the output signal (monitored current signal) to decide a gain of the amplifier.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: May 19, 2015
    Assignee: Rohm Co., Ltd.
    Inventors: Tetsuo Yamato, Takashi Fujimura
  • Patent number: 9030143
    Abstract: A method of limiting current to a motor. The method comprising monitoring a speed of a motor, an input voltage of a controller, and a temperature of the controller. Determining a maximum current limit for the motor based on the monitored speed when the motor speed is below a speed threshold. Determining a maximum current limit for the motor based on the input voltage and the temperature when the motor speed is above the speed threshold and the input voltage is below an input voltage threshold. Determining a maximum current limit for the motor based on the temperature when the motor speed is above the speed threshold and the input voltage is above the input voltage threshold. Or determining a maximum current limit for the motor based on the monitored speed when the motor speed is above the speed threshold and the temperature is below a temperature threshold.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: May 12, 2015
    Assignee: Regal Beloit America, Inc.
    Inventor: Yilcan Guzelgunler
  • Patent number: 9024547
    Abstract: Apparatus and methods for reducing unwanted conducted noise generated by a DC load 17. Load 17 is powered by a voltage source 11. A current sense 13 senses pulse current Ifan flowing through the load 17. First converting means 14, 15, 16 converts the sensed pulse current Ifan to a correction voltage Vp. The correction voltage Vp is then converted to a correction current Ip, which offsets the deleterious effects of Ifan. The current Is flowing through the voltage source 11 equals Ifan plus the correction current Ip.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: May 5, 2015
    Assignee: Allied Telesis, Inc.
    Inventor: Randall Vogt
  • Patent number: 9018878
    Abstract: A machine propelled by an electric motor and subject to a deration scheme is described wherein deration is specified by a combination of a temperature signal indicating a degree to which a machine component is overheating. The machine includes an electronic controller that receives a temperature signal indicative of a current temperature status of the electric motor. The electronic controller receives a motor speed signal indicative of a current speed status of the electric motor. The electronic controller calculates, in accordance with a derating scheme, a deration value for the electric motor, the deration value being determined by applying a set of current operating state parameter values to the derating scheme. The set of current operating state parameters include: a motor speed parameter value; and a temperature parameter value.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: April 28, 2015
    Assignee: Caterpillar Inc.
    Inventors: Matthew Hendrickson, Bo Xie
  • Publication number: 20150108922
    Abstract: A motor driving device for a vehicle relates to a technology for preventing motor deterioration by controlling a stall current when a motor is controlled for vehicle air-conditioning. The motor driving device includes: a stall current detector that outputs a current detection signal by detecting a stall current of a motor, a controller that pre-stores a control specification of the motor, and outputs a control signal in response to the control specification when the current detection signal is activated; and an output driver that outputs a drive signal for controlling driving of the motor in response to the control signal.
    Type: Application
    Filed: December 26, 2013
    Publication date: April 23, 2015
    Applicants: Kia Motors Corporation, Hyundai Motor Company
    Inventors: Jin Kim, Young Su Kim, Yong Wook Kwon, Ji Soo Park
  • Publication number: 20150101249
    Abstract: A method for controlling movement of a window glass (12) in a vehicle using an electric motor (26) associated with a drive mechanism (1,2,3,4) through a cable (50), said method comprising the steps: determining an actual position (X2) of the window glass (12) based on the movement of the motor (26), determining a cable stiffness (S2), determining a position lag (400) of the window glass (12) based on the determined actual position (X2) of the window glass (12), a predetermined position (Z2) of the window glass (12) and the cable stiffness (S2); and continuously correcting the position of the window glass (12) based on the determined position lag (400).
    Type: Application
    Filed: February 25, 2013
    Publication date: April 16, 2015
    Inventors: Holger Pruessel, Scott Averitt, Kumar Saurabh
  • Publication number: 20150097503
    Abstract: An image forming apparatus includes an engine portion configured to perform image forming, a direct current (DC) motor configured to mechanically operate the engine portion, a driver including a resistor to measure current that flows to the DC motor according to the measured current and configured to provide a predetermined voltage to the DC motor, and a drive controller configured to measure a driving speed of the DC motor based on a voltage value of the resistor and to control the driver to provide a voltage that corresponds to the measured driving speed to the driver.
    Type: Application
    Filed: April 4, 2014
    Publication date: April 9, 2015
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hak-young KIM, Hyoung-il KIM, Yong-ho YOU
  • Patent number: 8988015
    Abstract: A power tool including a motor, an input unit such as a variable-speed trigger switch, and a controller is provided. The controller controls the speed of the motor as a function of the input level indicated by the electrical signal from the input unit. The function is a first expression within a first predetermined range of the input level and a second expression within a second predetermined range of the input level, where the second expression corresponds to a polynomial of a second degree or higher and is different from the first expression.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: March 24, 2015
    Assignee: Black & Decker Inc.
    Inventors: Michael K. Forster, Jason K. Leh, Wing W. Lin
  • Patent number: 8975849
    Abstract: There are provided a first notch filter disposed in a feedback control system, an oscillation extracting filter for outputting signal x1 containing an oscillation component, a second notch filter for inputting signal x1, a notch control portion for changing a notch center frequency based on signal x1 and second notch filter output signal x2, a notch depth control portion for changing a notch depth of the first notch filter based on signal x1, and a control determining portion for carrying out control to operate either the notch control portion or the notch depth control portion.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: March 10, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroshi Fujiwara, Toru Tazawa
  • Patent number: 8975845
    Abstract: Systems and methods of detecting a failure of a permanent magnet synchronous motor system. A current of each phase coil of the motor is monitored. A value indicative of the power of the motor is compared to a threshold value indicative of power during a low power detection period. If the value indicative of the power fails to exceed the threshold value indicative of power for the entire low-power detection period, the system indicates a first error condition. The method also monitors the speed of the motor and indicates a second error condition if the speed of the motor remains below a speed threshold for an entire speed failure detection period. A third error condition is indicated if the current of at least one phase of the motor remains below a phase current threshold for an entire loss of phase detection period.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: March 10, 2015
    Assignee: Regal Beloit America, Inc.
    Inventor: Yilcan Guzelgunler
  • Patent number: 8970153
    Abstract: An apparatus for controlling a speed of a motor, includes: a first duty change detection unit detecting a change in duty of a PWM signal supplied from the outside; a speed conversion unit converting a speed indication (command) having the PWM signal into an actual speed value (RPM value) based on the change in duty detected by the first duty change detection unit; a speed control unit generating a new speed indication value to be applied to a motor and determining the duty value of PWM signal based on the new speed indication value; a second duty change detection unit detecting the change in the duty value of PWM signal determined by the speed control unit; and a PWM generation unit generating the PWM signal actually applied to the motor based on the change in the duty value detected by the second duty change detection unit.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 3, 2015
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Bon Young Gu
  • Publication number: 20150015172
    Abstract: The present invention relates to a motor controller which includes a motor; an oscillator for generating a clock signal; a speed detection unit for detecting the rotational speed of the motor from a pulse signal generated according to the rotation of the motor and the clock signal; and a sampling period determination unit for determining a sampling period by compensating an error generated in the oscillator and provides an useful effect that can precisely control the rotational speed of the motor in spite of the error of the oscillator.
    Type: Application
    Filed: November 6, 2013
    Publication date: January 15, 2015
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventor: Bon Young GU
  • Publication number: 20140368146
    Abstract: A power circuit for different types of fans includes first through sixth terminals, a control chip, first through third loads, and a connector. If a 3-pin fan is connected to the connector, only the first load connects the first and second terminals, and a control pin of the connector is idle. If a 4-pin fan is connected to the connector, the second load connects the third and fourth terminals, the third load connects the fifth and sixth terminals, and the first load does not connect the first and second terminals. The control pin receives a divided voltage to control fan speed.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 18, 2014
    Inventors: GUO-YI CHEN, KANG WU, BO TIAN
  • Publication number: 20140354202
    Abstract: A motor control device controls a speed of a motor. The motor control device includes: a target speed generating unit that generates a target speed; a speed detecting unit that detects a current speed of the motor; a speed comparing unit that compares the target speed with the current speed to calculate a speed error; an error amplifying unit that amplifies the speed error and outputs a control value; and a motor driving unit that drives the motor in accordance with the control value. The error amplifying unit has proportional integral characteristics by which the speed error is amplified with a proportional gain and integration is performed in a lower frequency range than an integral corner frequency, increases the proportional gain as the current speed is higher, and shifts the integral corner frequency to a lower frequency as the current speed is higher.
    Type: Application
    Filed: May 22, 2014
    Publication date: December 4, 2014
    Applicant: Ricoh Company, Limited
    Inventor: Haruyuki SUZUKI
  • Patent number: 8901869
    Abstract: A method of controlling speed of an electric machine having a rotor and a stator is provided. The method may comprise the steps of monitoring a desired speed and a measured speed of the rotor, generating a torque command based on the desired speed and the measured speed, and controlling phase current to the stator based on a hybrid closed loop analysis of the torque command, the measured speed and an estimated position of the rotor. The estimated rotor position may be derived at least partially from the desired speed.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: December 2, 2014
    Assignee: Caterpillar Inc.
    Inventors: Jackson Wai, Jesse Gerdes, James Michael Thorne
  • Patent number: 8866427
    Abstract: When it is determined that the number of times that motor rotation-indicative quantity has been detected has exceeded a measurement interval, a feedback speed value is calculated from a motor rotation-indicative quantity detected immediately before, a motor rotation-indicative quantity detected immediately before the last time a measurement interval determination means determined that the number of times had exceeded the measurement interval, and time that has elapsed since the last time the measurement interval determination means determined that the number of times had exceeded the measurement interval, and the measurement interval having a length calculated from a greater one between the calculated feedback speed value and a speed command value is set for the measurement interval determination means to refer to.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: October 21, 2014
    Assignees: IHI Aerospace Co., Ltd., Sinfonia Technology Co., Ltd.
    Inventors: Hitoshi Oyori, Masaaki Monte
  • Publication number: 20140306633
    Abstract: A motor control device includes a measuring unit configured to output a measurement value corresponding to a rotation speed of a motor; and a control unit configured to control driving of the motor such that the measurement value makes closer to a target value. When the measurement value does not exceed a predetermined abnormality determination threshold, the control unit controls the driving of the motor based on a difference between the measurement value and the target value. The abnormality determination threshold is set in a positive direction or in a negative direction with reference to the target value. When the measurement value exceeds the abnormality determination threshold, the control unit controls the driving of the motor based on a difference between a corrected measurement value and the target value. The corrected measurement value is set in the same direction as the direction in which the abnormality determination threshold is set.
    Type: Application
    Filed: April 14, 2014
    Publication date: October 16, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventor: Masahiro Ashikawa
  • Patent number: 8860351
    Abstract: A fan speed control circuit is provided. The circuit includes a sensor, a control chip, a first integrated circuit, an integrated operational amplifier, a second integrated circuit, and a feedback comparator. The sensor senses a temperature of an electronic component. The control chip outputs a PWM signal corresponding to the temperature to a fan. The first integrated circuit and the second integrated circuit respectively generate a first equivalent voltage and a second equivalent voltage. The integrated operational amplifier amplifies the first equivalent voltage to generate an upper limit voltage and reduces the first equivalent voltage to generate a lower limit voltage. The feedback comparator compares the second equivalent voltage with the upper limit voltage and the lower limit voltage to generate a comparison value. The control chip adjusts the duty cycle of the PWM signal according to the comparison value, and outputs the adjusted PWM signal to the fan.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: October 14, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Hsien-Chang Chiu
  • Patent number: 8860350
    Abstract: A motor driving apparatus is applied to a fan and motor mechanism and a voltage supply unit. The motor driving apparatus includes a motor driving unit, a voltage division resistor, a first resistor, a first switch unit, a second resistor, a second switch unit, a third resistor, a third switch unit, a transistor switch, and a pulse width modulation unit. The first switch unit, the second switch unit, and the third switch unit are configured to select the rotational speed upper limitation of the fan and motor mechanism for suppressing noise.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: October 14, 2014
    Assignee: Enermax Technology Corporation
    Inventor: Yen-Wen Su
  • Patent number: 8855826
    Abstract: Vibration in a mechanical system driven by a motor connected to a load is reduced by providing an angular position and an angular velocity of the motor to a linear feedback term and to a nonlinear feedback term. Outputs of the linear feedback term and the nonlinear feed term, and an optimal feedforward term determined off-line are summed to produce a summed signal, which is fed back to control a torque of the motor.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: October 7, 2014
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Mouhacine Benosman, Vijay Shilpiekandula, Scott A. Bortoff
  • Patent number: 8823297
    Abstract: The invention relates to a method of control implemented in a variable speed drive for controlling the deceleration of an electric motor (M) in the case of electrical power outage. The method of control comprises: a step of determining the Joule-effect losses to be applied to the electric motor (M) and to the variable speed drive according to a deceleration ramp to be applied to the electric motor (M) during an electrical power outage, a step of determining the flux reference (?ref) as a function of the said Joule-effect losses to be applied to the electric motor (M) and to the variable speed drive.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: September 2, 2014
    Assignee: Schneider Toshiba Inverter Europe SAS
    Inventors: Ludovic Kermarrec, Francois Malrait
  • Patent number: 8786226
    Abstract: In a method for operating a drive unit having an electric machine, in a normal operating mode the electric machine is operated with current provided by an inverter on at least two phases, and particular phase voltages for the electric machine are set on the phases. Upon an occurrence of an error of the inverter, the inverter is operated in an emergency operating mode for the further operation of the electric machine.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: July 22, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Ulrich Vollmer, Ekkehard Hoffmann
  • Publication number: 20140184122
    Abstract: A construction machine includes: a swing structure (1d); an electric motor (16) that drives the swing structure; an operating device (4b) that outputs an operating signal according to an operating amount and an operating direction; an inverter device (13) that controls the electric motor based on a control signal generated based on the operating signal; a position sensor (24) that detects an actual speed of the electric motor; and a second controller (22) that determines whether at least one of a first condition and a second condition is satisfied. The first condition is satisfied when a sign of a value computed by subtracting the actual speed V from a target speed V* of the electric motor that defined by the control signal; and the second condition is satisfied when a difference between the target speed and the actual speed is greater than a reference value Vth, and when the acceleration is greater than a reference value ?th.
    Type: Application
    Filed: May 30, 2012
    Publication date: July 3, 2014
    Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
    Inventors: Takashi Ogawa, Kohei Sakurai, Yuichiro Morita
  • Patent number: 8766583
    Abstract: According to an aspect of the invention, an apparatus includes: a spindle motor; and circuitry configured to spin up the spindle motor by increasing a command voltage in small steps while monitoring a current flowing through the spindle motor. According to another aspect of the invention, a method includes: spinning up a spindle motor from a stationary state to a target speed using a voltage mode of operation for the spindle motor, wherein the spinning up includes supplying to the spindle motor a series of multiple discrete voltage levels ranging from a first voltage level to a second voltage level; and maintaining the spindle motor at the target speed.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: July 1, 2014
    Assignee: Marvell International Ltd.
    Inventors: Ravishanker Krishnamoorthy, Foo Leng Leong
  • Patent number: 8760101
    Abstract: An electrical actuator limits the speed of the electric motor which controls the hydraulic pump of the actuator, during the opening of a pressure relief valve. To this end, the electrical actuator applies an auxiliary set-point speed value to the electric motor to avoid damage that may be caused by overheat at the actuator.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: June 24, 2014
    Assignee: Airbus Operations (SAS)
    Inventors: Olivier Babando, Laurent Steiner
  • Publication number: 20140159633
    Abstract: There are provided a motor control apparatus and method. The motor control apparatus includes: a signal generating unit generating a first signal; a sampling unit obtaining the numbers of pulses of the first signal included in a plurality of sampling sections having different start timings, respectively; and a calculating unit calculating a speed of a motor using the numbers of pulses of the first signal obtained with respect to the plurality of sampling sections.
    Type: Application
    Filed: March 11, 2013
    Publication date: June 12, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.,
    Inventor: Bon Young GU
  • Patent number: 8749187
    Abstract: A computer-implemented fan control method includes measuring a temperature within a computer system and dynamically selecting a fan speed step in response to the temperature received, wherein the fan speed step is selected from a fan speed table defining a finite number of fan speed steps each having an associated fan speed. A fan is operated at the dynamically selected fan speed step, wherein the fan is positioned to drive air through the computer system where the temperature is being measured. The fan output variation is measured over a prescribed time interval and the fan speed table is automatically modified to change the fan speeds associated with each fan speed step, wherein the fan speeds are changed as a function of the measured fan output variation while continuing to drive the fan.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: June 10, 2014
    Assignee: International Business Machines Corporation
    Inventors: Diane S. Busch, Troy W. Glover, Whitcomb R. Scott, III
  • Patent number: 8736213
    Abstract: The motor position controller inputs a command pulse signal and a desired pulse form setting, and drives a motor based on the command pulse signal. The motor position controller includes a position command generating device configured to generate a position command signal from the command pulse signal in accordance with the inputted desired pulse form setting, a motor controlling part configured to supply power to the motor based on the position command signal, and a first conformity determination device configured to determine the conformity of the desired pulse form setting and the command pulse signal.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: May 27, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventor: Tadashi Okubo
  • Publication number: 20140139164
    Abstract: There are provided an apparatus and a method for controlling motor driving and a motor using the same. The motor driving control apparatus according to an embodiment of the present invention includes a driving signal generating unit generating a driving signal for a motor apparatus; a speed detecting unit detecting a rotational speed of the motor apparatus; and a controlling unit monitoring an instantaneous speed and an average speed using the rotational speed and comparing the instantaneous speed with the average speed to determine an occurrence of an abnormal state in the motor apparatus.
    Type: Application
    Filed: February 19, 2013
    Publication date: May 22, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Joo Yul KO
  • Publication number: 20140097777
    Abstract: Some of the embodiments of the present disclosure provide a method comprising detecting, based on a sensor and a back electromagnetic force generated in a rotating device, a speed of the rotating device; and based on (i) the speed detected using the sensor or (ii) the speed detected using the back electromagnetic force, driving the rotating device.
    Type: Application
    Filed: October 1, 2013
    Publication date: April 10, 2014
    Applicant: Marvell World Trade Ltd.
    Inventors: Foo Leng Leong, Ravishanker Krishnamoorthy
  • Publication number: 20140092195
    Abstract: A scanning system for use in an imaging apparatus includes a mirror assembly having a rotating mirror with a plurality of facets, a motor operatively coupled to the rotating mirror and closed loop control circuitry coupled to the motor. The minor assembly generates a lock signal indicative of whether or not the motor is substantially at a target speed. A controller is communicatively coupled to the minor assembly for controlling rotation of the rotating mirror, the controller generating a reference signal received by the motor assembly indicating the target speed for the rotating minor. The reference signal is varied based at least in part upon an acceleration profile that accelerates the motor so that overshoot of the target speed is substantially reduced.
    Type: Application
    Filed: October 2, 2012
    Publication date: April 3, 2014
    Applicant: LEXMARK INTERNATIONAL, INC.
    Inventors: Steven Jeffrey Harris, Simarpreet Singh Rattan, Kevin Dean Schoedinger
  • Patent number: 8680800
    Abstract: A driving system for a fan that enables an increase in motor current that may be supplied to excitation windings at the time of a maximum static pressure without increasing the rotational speed excessively when an amount of maximum air flow is provided. The fan driving system includes a drive signal generating circuit that generates drive signals, a motor driving circuit that supplies a motor current to the motor in accordance with the drive signals, a current detecting circuit (resistance) that detects the motor current, and a drive signal changing circuit. The drive signal changing circuit changes the drive signals generated by the drive signal generating circuit to restrict an increase in the motor current when the motor current becomes larger than a threshold.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: March 25, 2014
    Assignee: Sanyo Denki Co., Ltd.
    Inventors: Shigekazu Mitomo, Kevin Yen
  • Patent number: 8669734
    Abstract: A control device divides 360° corresponding to one cycle of a resolver angle into N zones, and determines whether or not a resolver angle ? in the current cycle exceeds a division border. When determined that resolver angle ? in the current cycle exceeds a division border, the control device calculates a time difference ?T[n] between a calculation time T[n] in the immediately preceding resolver cycle and a calculation time T in the current cycle. The control device also calculates a resolver angle variation ??[n] with time difference ?T[n] by adding 360° to the difference between resolver angle ? obtained in the current cycle and a resolver angle ?[n] obtained in the immediately preceding resolver cycle. The control device then calculates a rotation speed NM by multiplying, by a coefficient K, a value obtained by dividing ??[n] by ?T[n].
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: March 11, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Kenji Yamada, Yasuhiro Nakai, Satoru Katoh, Yoshihiro Shamoto, Takaya Soma
  • Publication number: 20140062370
    Abstract: Disclosed herein are an apparatus and a method for controlling a speed of a motor. An apparatus for controlling a spaced of a motor according to an exemplary embodiment of the present invention includes: a PWM conversion unit detecting a hall sensor signal from a motor to output a pulse width modulated signal corresponding to the detected hall sensor signal; a duty detection unit detecting a duty value of the pulse width modulated signal output by the PWM conversion unit; an error calculation unit comparing a PWM duty input from the outside with a duty detected by the duty detection unit to obtain an error; and a speed control unit controlling a speed of a motor based on an error obtained by the error calculation unit.
    Type: Application
    Filed: March 14, 2013
    Publication date: March 6, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: BON YOUNG GU
  • Publication number: 20140062369
    Abstract: An apparatus for controlling a speed of a motor, includes: a first duty change detection unit detecting a change in duty of a PWM signal supplied from the outside; a speed conversion unit converting a speed indication (command) having the PWM signal into an actual speed value (RPM value) based on the change in duty detected by the first duty change detection unit; a speed control unit generating a new speed indication value to be applied to a motor and determining the duty value of PWM signal based on the new speed indication value; a second duty change detection unit detecting the change in the duty value of PWM signal determined by the speed control unit; and a PWM generation unit generating the PWM signal actually applied to the motor based on the change in the duty value detected by the second duty change detection unit.
    Type: Application
    Filed: March 13, 2013
    Publication date: March 6, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO. LTD.
    Inventor: Bon Young GU
  • Publication number: 20140035505
    Abstract: A method of controlling speed of an electric machine having a rotor and a stator is provided. The method may comprise the steps of monitoring a desired speed and a measured speed of the rotor, generating a torque command based on the desired speed and the measured speed, and controlling phase current to the stator based on a hybrid closed loop analysis of the torque command, the measured speed and an estimated position of the rotor. The estimated rotor position may be derived at least partially from the desired speed.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 6, 2014
    Applicant: CATERPILLAR, INC.
    Inventors: Jackson Wai, Jesse Gerdes, James Michael Thorne
  • Publication number: 20130314018
    Abstract: The present invention relates to an apparatus and a method for controlling a motor speed. In accordance with an embodiment of the present invention, an apparatus for controlling a motor speed including: a speed difference detecting unit for calculating a difference between a motor control speed and a detected motor speed; a duty generating unit for changing a duty according to the speed difference detected by the speed difference detecting unit and duty update time adjustment; and a time adjusting unit for adjusting a duty update time according to a duty variation in the duty generating unit is provided. Further, a method for controlling a motor speed is provided.
    Type: Application
    Filed: May 22, 2013
    Publication date: November 28, 2013
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Bon Young Gu
  • Patent number: 8593099
    Abstract: Provided is an electric compressor whose manufacturing cost is reduced and in which a motor driving circuit can be positively protected. A temperature sensor is provided in the vicinity of a power semiconductor element whose temperature becomes highest among a plurality of power semiconductor elements and control of the number of revolutions of a motor is performed on the basis of temperatures detected by the temperature sensor, whereby it is possible to change the number of revolutions of the motor by using a temperature in the vicinity of a power semiconductor element in a position under the worst temperature conditions as a reference, and it becomes possible to positively protect an inverter circuit without the need for a plurality of temperature sensors.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: November 26, 2013
    Assignee: Sanden Corporation
    Inventors: Makoto Shibuya, Atsushi Saito
  • Patent number: 8593097
    Abstract: A seat adjusting device for an automobile seat (1) having an electric motor (11) for generating a drive motion, wherein the electric motor is operationally coupled to a gearbox (13) for transmitting the drive motion thereof, the gearbox having a gearbox housing (19) in which gearbox elements are disposed for a step-up or step-down transmission of the motor drive motion, by means of which electric motors of lesser technical complexity can be used than previously. To this end, the invention proposes that the gearbox (13) has detection device for detecting information about the speed of at least one of the gearbox elements or detecting a variable dependent on the speed.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: November 26, 2013
    Assignee: Keiper GmbH & Co. KG
    Inventor: Andreas Diehl
  • Patent number: 8569988
    Abstract: An actuator and a method for controlling the actuator are described. The actuator comprises: an output member rotatable around an axis of rotation; an input member rotatable around the axis and connected for rotation with the output member via a plurality of cylindrical helical springs; a motor assembly arranged to drive the input member to rotate around the axis of rotation; first and second sensors for detecting the angular position of the input member and the relative angular position between the input member and the output member; and an electronic control unit arranged to determine a desired angular velocity of the input member on the basis of a desired value for the impedance of the actuator and to control the motor assembly on the basis of the error between the desired angular velocity of the input member and the angular velocity of the input member.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: October 29, 2013
    Assignee: Fondazione Istituto Italiano di Tecnologia
    Inventors: Nikos G. Tsagarakis, Darwin G. Caldwell, Matteo Laffranchi, Bram Vanderborght
  • Patent number: 8547050
    Abstract: Systems, methods, and devices are disclosed, including an induction-motor controller having a phase path; a solid-state switch interposed on the phase path; and a controller coupled to the solid-state switch. In certain embodiments, the controller is configured to switch the solid-state switch so that the solid-state switch is conductive during a conduction angle of a cycle of an incoming AC power waveform conveyed by the phase path, calculate the conduction angle based on a generally sinusoidal reference value that has a frequency lower than a frequency of the incoming AC power waveform, and adjust the generally sinusoidal reference value based on a value indicative of flux in a load coupled to the phase path.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: October 1, 2013
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Haihui Lu, David M. Messersmith, Thomas A. Nondahl