Having Electronic Power Conversion Circuit Patents (Class 318/722)
  • Patent number: 10386104
    Abstract: A domestic refrigeration device and a method for operating a domestic refrigeration device. The domestic refrigeration device has a heat-insulated body with a coolable inner container which delimits a coolable interior provided for storing food. A coolant circuit is provided for cooling the coolable interior and includes a compressor and a field-oriented electric drive. The field-oriented electric drive has a field-oriented controller, a converter, and a permanently excited synchronous motor which is connected downstream of the converter and which is part of the compressor or is provided for driving the compressor.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 20, 2019
    Assignee: BSH Hausgeraete GmbH
    Inventors: Achim Paulduro, Tommy Beckmann, Axel Walter, Moritz Klein
  • Patent number: 10389292
    Abstract: Power converters, controllers, methods and non-transitory computer readable mediums are presented, in which a processor operates a switching rectifier in a first mode to regulate a DC bus voltage signal using rectifier switching control for motoring rectifier operation when the measured DC bus voltage value is less than or equal to a first threshold value, operates the switching rectifier in a second mode to regulate the DC bus voltage signal using rectifier switching control for regenerative rectifier operation when the measured DC bus voltage value is greater than the first threshold value and less than or equal to a higher second threshold value, and operates an inverter in a third mode to regulate the DC bus voltage signal using inverter acceleration/deceleration control when the measured DC bus voltage value is greater than the second threshold value.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: August 20, 2019
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Jacob M. Lamb, Ahmed S. Mohamed Sayed Ahmed, Brian J. Seibel, Timothy M. Rowan
  • Patent number: 10361648
    Abstract: To avoid control failure resulting from startup of a PMSM that is windmilling, initial speed and position are determined before startup. A controller uses a FOC routine having a speed PI control loop, field-weaken control, a current PI control loop, and a speed observer. When the controller receives an instruction to start the PMSM, it delays startup and executes an “estimation” stage, in which the controller executes the FOC routine but with the speed PI control loop and the field-weaken control disabled. The estimation stage is repeated multiple times, with estimates converging to actual speed and position through successive iterations. When estimated speed and position values have stabilized, the motor is started using the estimates as initial speed and position for driving the PMSM. The FOC routine, with the speed PI control loop and the field-weaken control enabled, is used to drive the PMSM.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: July 23, 2019
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventor: Weizi Wang
  • Patent number: 10177695
    Abstract: A position estimation unit of a motor control apparatus includes a counter electromotive voltage estimation unit configured to estimate a counter electromotive voltage generated in a motor based on generated voltage and current of the motor, and an arc tangent calculation unit configured to perform an arc tangent calculation using coordinate data on a two-dimensional plane based on the estimated counter electromotive voltage to calculate an angle of deviation. The arc tangent calculation unit includes a rotation calculation unit configured to repeatedly perform a rotation calculation of coordinate data on a fundamental wave and a harmonic; a rotation direction judgment unit configured to judge a rotation direction of a subsequent rotation calculation based on a result of the rotation calculation of the rotation calculation unit; and a deviation angle calculation unit configured to calculate a total of rotation angles obtained as a result of the rotation calculation.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: January 8, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toru Miyazawa, Masahiko Mizoguchi, Kota Kiyama
  • Patent number: 10132535
    Abstract: An inverter-integrated electric compressor includes an inverter housing portion, an inverter device including a substrate having an inverter circuit mounted thereon, the inverter device being integrally incorporated in the inverter housing portion, and a busbar assembly formed by a UVW busbar covered by a resin case, the UVW busbar conducting AC power converted by the inverter circuit from the substrate side to a motor terminal. In such a compressor, the busbar assembly includes an adhering partition adhered to an end surface of the substrate using an adhesive, the adhering partition being provided in an upright manner on a lower surface of the resin case of the busbar assembly; a height (H) and a gap (S) of the adhering partition relative to the end surface of the substrate are set as appropriate; and the adhering partition and the end surface of the substrate are adhered to each other using the adhesive.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: November 20, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
    Inventors: Makoto Hattori, Takeo Hayashi
  • Patent number: 10090738
    Abstract: A motor assembly broadly includes a motor, a motor controller, and an interface controller having an integrated power supply. The integrated power supply includes an AC to DC power conversion and voltage reduction component. The motor controller and the interface controller receive line voltage electrical power without the need for an external transformer.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: October 2, 2018
    Assignee: Nidec Motor Corporation
    Inventors: Christopher D. Schock, Randy L. Bomkamp
  • Patent number: 10003285
    Abstract: A method of controlling an electric motor that generates an output current from an input voltage command that includes a sum of a first voltage command and a second voltage command is provided. The method receives the output current from the motor as a feedback. The method determines a first set of gain factors to generate the first voltage command based on the feedback such that the input voltage command causes the motor to generate the output current with reduced influence of variations of a set of operating parameters of the motor. The method determines a difference between the feedback and a desired current. The method determines a second set of gain factors to generate the second voltage command based on the difference such that the input voltage command causes the motor to generate the output current as a first, second or higher order response.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: June 19, 2018
    Assignee: STEERING SOLUTIONS IP HOLDING CORPORATION
    Inventors: Prerit Pramod, Shrenik P. Shah, Julie A. Kleinau, Michael K. Hales
  • Patent number: 9973136
    Abstract: A method for controlling a motor based on a variable current controller gain may include a temperature function current applying mode in which when a torque command for the motor is detected by an inverter, 3-phase current to be applied to the motor is output to the motor in consideration of a motor temperature of the motor as a function.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: May 15, 2018
    Assignee: Hyundai Motor Company
    Inventors: Jae-Sang Lim, Kil-Young Youn, Jin-Ho Kim, Jeong-Bin Yin
  • Patent number: 9954476
    Abstract: A TH terminal receives an analog control voltage VTH which indicates a rotational speed. With a first platform, a capacitor and a discharging resistor are connected in parallel between an OSC terminal and the ground. A charging resistor and a first switch are arranged in series between the OSC terminal and a reference voltage line via which a stabilized voltage is supplied. When an oscillator voltage VOSC that occurs at the OSC terminal reaches an upper-side threshold VH, a switching circuit turns off the first switch. When the oscillator voltage VOSC falls to a lower-side threshold value VL, the switching circuit turns on the first switch. The oscillator voltage VOSC is compared with the voltage at the TH terminal, so as to generate a pulse-modulated control pulse S3.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: April 24, 2018
    Assignee: ROHM CO., LTD.
    Inventors: Tomofumi Mishima, Masahiro Nakamura, Joji Noie
  • Patent number: 9929684
    Abstract: In various embodiments, a method of controlling a motor and motor control system may be provided. The method may include applying exciting pulse-width-modification (PWM) or continuous sinusoidal voltages to a motor. The method may further include measuring one or more the applied exciting voltages to the motor. The method may further include measuring one or more currents from the motor. The method may also include calculating one or more back electromotive force (BEMF) voltages based on the one or more currents. The method may include adjusting the exciting voltages based on the one or more back electromotive force (BEMF) voltages and the phase angle difference between the calculated back EMF voltages and the measured currents. The motor control system may include the various detecting circuits of the exciting voltages and the motor currents from the motor with low pass filters.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: March 27, 2018
    Assignee: Marvell International Ltd.
    Inventor: Quan Jiang
  • Patent number: 9853544
    Abstract: A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a power supply system to avoid an over-voltage event across one or more switching devices of the power supply system, the controlling step based on switching overlap information that includes instructions for either advancing or retarding a switching signal associated with at least one of the switching devices.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: December 26, 2017
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Arvind Govindaraj, Jun Kikuchi
  • Patent number: 9853587
    Abstract: A variable frequency motor drive comprises a converter including a rectifier having an input for connection to an AC power source and converting the AC power to DC power. A DC bus is connected to the rectifier circuit. At least one bus capacitor is across the DC bus. An inverter receives DC power from the DC bus and converts the DC power to AC power to drive a motor. A controller is operatively connected to the converter. The controller comprises a speed control controlling the inverter responsive to a speed command to maintain a desired motor speed. A speed foldback control measures DC bus ripple voltage and regulates the speed command responsive to the measured DC bus ripple voltage.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: December 26, 2017
    Assignee: Yaskawa America, Inc.
    Inventors: Mahesh M. Swamy, Anupama Balakrishnan, Joshua David Collins
  • Patent number: 9853588
    Abstract: A control circuit for a motor of a compressor includes an inverter control module configured to control power switching devices of an inverter to generate output voltages from a DC power supply. The output voltages are applied to windings of the motor. A current control module is configured to generate voltage signals based on a torque demand. The inverter control module controls the power switching devices according to the voltage signals. A selector is configured to output one of an open loop torque value and a closed loop torque value as the torque demand. An open loop torque module is configured to generate the open loop torque value. The open loop torque module is configured to apply an upper limit to the open loop torque value. The upper limit is based on a voltage of the DC power supply.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: December 26, 2017
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Charles E. Green, Joseph G. Marcinkiewicz
  • Patent number: 9853512
    Abstract: Described is an electrical machine, including: a rotor having a magnetic flux source mounted thereto; a stator winding arrangement having a first set of electrical connections to provide a first output channel, and a second set of electrical connections to provide a second output channel, the first and second channels being electrically out of phase, wherein the stator winding arrangement is constructed from a plurality of winding portions which are connected in electrical series.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: December 26, 2017
    Assignee: ROLLS-ROYCE plc
    Inventors: David Reginald Trainer, Konstantinos Kampisios, Omar Fadhel Jasim, Ellis Fui Hen Chong, John James Anthony Cullen
  • Patent number: 9774275
    Abstract: Platforms and techniques are provided for controlling a power inverter using space vector pulse width modulation (PWM) operation. The inverter converts a direct voltage (DC) power source to an alternating voltage (AC) output by controlling a set of three phase switches. A bootstrap capacitor is coupled to each switch. When each switch in the set of three phase switches is in a zero state, the coupled bootstrap capacitor can charge from the current delivered in a corresponding pulse width modulation (PWM) signal. The bootstrap capacitor can deliver stored power when a one (high) switch state is entered. Each switch can be maintained at a zero state, and thus charge the bootstrap capacitor, for at least two consecutive segments of the PWM cycle. Pre-charging of the bootstrap capacitor is ensured before power delivery is required.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: September 26, 2017
    Assignee: CARRIER CORPORATION
    Inventors: William Perdikakis, Da Zhang, Thomas Gietzold
  • Patent number: 9608555
    Abstract: A method is described for activating a multiphase machine that has a link circuit equipped with a link circuit capacitor, phase windings, and one high-side switch and one low-side switch per phase. The switches associated with the individual phases have control signals applied to them by a control unit. The control unit provides, in successive activation cycles, pulse-shaped control signals for the switches, the pulse widths and pulse onsets of which are respectively varied within an activation cycle in such a way that the link circuit current is reduced.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: March 28, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: Fabio Magini, Paul Mehringer
  • Patent number: 9583986
    Abstract: A power generator for a hydro turbine is axially coupled to the hydro turbine. The generator comprises a rotor arranged to rotate about an axis in response to fluid flow through said turbine. A first stator structure incorporates at least a first winding disposed circumferentially around the axis and axially displaced in a first inboard direction from the rotor. A second stator structure incorporates a least a second winding disposed circumferentially around the axis and axially displaced in a second outboard direction from the rotor, the rotor being arranged to electrically couple with the windings.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: February 28, 2017
    Assignee: Openhydro IP Limited
    Inventors: Simon Cawthorne, Edward Spooner
  • Patent number: 9431326
    Abstract: In a semiconductor device, semiconductor chips and lead frames are soldered at the same time on an insulating circuit board by one reflow soldering, and the positions of the externally led out lead frames undergo no change. In manufacturing the semiconductor device, after power semiconductor chips and control ICs are mounted on an insulating circuit board, and lead frames are disposed thereon, the semiconductor chips and lead frames are soldered at the same time on the insulating circuit board by one reflow soldering. Furthermore, after a primary bending work is carried out on the lead frames, and a terminal case is mounted over the insulating circuit board, a secondary bending work is carried out on the lead frames.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: August 30, 2016
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Toshio Denta, Tadanori Yamada, Eiji Mochizuki
  • Patent number: 9397554
    Abstract: A motor drive device includes an inverter for generating an AC voltage from a DC voltage by switching power elements, a current detection unit for detecting a current to be inputted to a motor, a current controller for generating a voltage command from a current command and a current detection value, a gate drive command generator for generating drive commands for the power elements such that a dead time in an output stage, that is a period of time in which both of the power elements for upper and lower arms that compose the output stage of the inverter are turned off, becomes a predetermined value, a gate drive circuit unit for outputting gate drive signals for the power elements, and a dead time estimator for estimating the dead time in the output stage that is produced by the gate drive signals for the power elements.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: July 19, 2016
    Assignee: Fanuc Corporation
    Inventors: Kunio Tsuchida, Taku Sasaki
  • Patent number: 9246420
    Abstract: Proposed is a motor control device that executes rotational control that follows load fluctuations in a startup mode. The proposed motor control device is provided with: detection means 4 that detects a current peak value Ip and a current electrical angle ?i based on phase currents Iu to Iw; detection means 5 that detects an induced voltage peak value Ep and an induced voltage electrical angle ?e based on phase currents Iu to Iw and applied voltages Vu to Vw; rotor position detection means 6 that detects a rotor position ?m using ?m=?i???90° or ?m=?e???90°; velocity fluctuation detection means 15 that detects a rotational velocity ? based on this ?m; and startup means 10 that outputs a startup voltage instruction value Vp and a startup voltage phase instruction value ?v, increases the rotational velocity of the synchronous motor M with predetermined acceleration, and makes the rotational velocity ? detected by the velocity fluctuation detection means 15 be reflected in ?v.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: January 26, 2016
    Assignee: SANDEN CORPORATION
    Inventor: Daisuke Hirono
  • Patent number: 9172295
    Abstract: A magnetic gear arrangement is provided having a first gear member that generates a first magnetic field and a second gear member that generates a second magnetic field. A plurality of interpoles are disposed between the two gear members for coupling the first and second magnetic fields to control a gear ratio between the gear members. At least one interpole has wiring associated with it that can be activated to alter the magnetic flux at the interpole, so as to vary the coupling between the first and second magnetic fields. The wiring is electrically connected to an electronic filter, which modifies the current passing through the wiring, so as to modify the influence of the wiring on the magnetic flux at the interpole.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: October 27, 2015
    Assignee: ROLLS-ROYCE plc
    Inventor: Huw L Edwards
  • Patent number: 9099945
    Abstract: In a system supplying power from an AC power supply to a three-phase motor via a converter and an inverter, a leakage current reducing apparatus is connected to a connection line between the AC power supply and the converter. A common mode transformer detects, as common mode voltage, common mode current flowing from the AC power supply to the connection line. The common mode voltage is inputted to a voltage amplifier via a filter apparatus. Output voltage obtained by voltage amplification passes through a capacitor and then is applied as an AC component to a neutral point of capacitors connected in a Y-connection fashion, so as to have the same phase as that of the common mode voltage. Thus, current having the same phase as that of the common mode current is supplied via the capacitors to the converter through the connection line, thereby reducing the common mode current.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: August 4, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Sakai, Satoshi Azuma
  • Patent number: 9083267
    Abstract: An electric motor vehicle includes an inverter, an electric motor, a power supply circuit, and a controller. The power supply circuit converts alternating current that the electric motor serving as a generator generates into direct current. The controller is supplied with electric power from the power supply circuit and controls switching elements of an inverter. The power supply circuit includes a transformer and a voltage regulator. The transformer includes a primary coil and a secondary coil, and the primary coil is connected to the electric motor. The voltage regulator adjusts the output of the secondary coil of the transformer to a predetermined direct-current voltage.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: July 14, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Takao Kanzaki
  • Patent number: 9059620
    Abstract: In an inverter in which noise reducing coils and a smoothing capacitor are provided on a power line to an inverter module to achieve a no-busbar configuration, simplification of the manufacturing process, reduction of the influence on the size of the inverter, enhanced noise reducing function, reduction in cost and so on, the smoothing capacitor is electrically connected, on the inverter module, to the power line in parallel with a power system board, and the noise reducing coils are connected to the power line by directly connecting output lead wires thereof to P-N terminals of the inverter module.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: June 16, 2015
    Assignee: MITSUBISHI INDUSTRIES LTD.
    Inventors: Hidetaka Sato, Koji Nakano, Kazunori Teshima, Takashi Nakagami, Koji Toyama, Takeshi Hirano, Takayuki Watanabe, Naoto Kunieda
  • Patent number: 9048767
    Abstract: A pulse-width modulation (PWM) inverter controller compensates for harmonics in the output current provided by a PWM inverter to permanent magnet (PM) motor. The PWM inverter controller includes a field-oriented controller (FOC) that monitors output currents provided by the PWM inverter to the PM motor and employs the monitored output currents in a current loop feedback that generates control signals. A harmonic compensator transforms monitored phase currents into rectangular waveforms having magnitudes modified based on detected harmonics within the monitored phase currents to generate compensation signals. The compensation signals generated by the harmonic compensator are summed with the control signals generated by the FOC to generate compensated control signals. A PWM signal generator generates PWM signals for controlling the PWM inverter based on the compensated control signals.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: June 2, 2015
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Gregory I. Rozman, Thomas A. Duclos, Duane A. James
  • Publication number: 20150130391
    Abstract: A motor drive controller may include: a current detecting unit detecting current values corresponding to a plurality of phases of a motor using a plurality of resistor elements; a correcting unit correcting an error in the detected current values caused by an error in the plurality of resistor elements; and a controlling unit controlling driving of the motor using an output of the correcting unit.
    Type: Application
    Filed: May 31, 2014
    Publication date: May 14, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Joo Yul Ko
  • Publication number: 20150130392
    Abstract: A power source control apparatus for a rotating electrical machine includes a TRC optimum voltage output portion (21) and a GEN optimum voltage output portion (22) that acquire a TRC optimum voltage and a GEN optimum voltage; a normal target voltage output portion (23) that sets a normal target voltage commonly applied to a traveling motor system and a power generating motor system using a DC/DC converter, based on a highest optimum voltage out of the TRC optimum voltage and the GEN optimum voltage; and a temperature protecting target voltage output portion (24) and a target voltage output portion (25) that limit the voltage commonly applied to the traveling motor system and the power generating motor system to a value lower than the normal target voltage.
    Type: Application
    Filed: April 18, 2013
    Publication date: May 14, 2015
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Kenji Kikuchi, Yoshihiro Ito
  • Patent number: 9030136
    Abstract: A motor controlling apparatus including an inverter, a voltage detector, a rotational speed detector, a command value calculating component, an inverter controller, a state detector and an offsetting component. The inverter converts direct-current power to alternating-current power supplied to a motor. The voltage detector detects a direct-current voltage, and the rotational speed detector detects a rotational speed of the motor. The calculating component calculates current and torque command values, and motor rotational speed. The controller provides a control signal to control the inverter based on the current command value. The state detector detects a control state of the inverter, and the offsetting component offsets the detected voltage or rotational speed by an offset amount. The calculating component modifies the current command value based on the offset detected voltage or rotational speed to increase on a negative side a d-axis current command value included in the current command value.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: May 12, 2015
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hidehiko Sugita, Ken Ito
  • Publication number: 20150123592
    Abstract: A motor controller is configured to control a driving of an AC motor. The motor controller includes a voltage calculation part, a voltage limit value generation part, and a d-axis current adjustment part. The voltage calculation part is configured to calculate a voltage instruction value. The voltage limit value generation part is configured to generate a first voltage limit value at which a power conversion efficiency becomes substantially the maximum corresponding to a drive characteristic of the motor. The d-axis current adjustment part is configured to adjust a d-axis current on the basis of a deviation between the first voltage limit value and the voltage instruction value.
    Type: Application
    Filed: October 29, 2014
    Publication date: May 7, 2015
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Sohei OGA, Tsuyoshi NONAKA, Takaaki ISHII
  • Patent number: 9018872
    Abstract: To provide a motor control circuit that variably controls the speed of a motor, in which an appropriate advance angle value corresponding to the speed of the motor that is set can be automatically set. The motor control circuit according to the present invention includes an advance angle setting means that adds a reference advance angle value to an advance angle correction value obtained by multiplying a proportional coefficient by a correction amount and outputs an advance angle setting signal, and an advance angle setting correction means that uses a ratio of a correction reference period relative to a period of a reference signal input from the outside as a correction amount and corrects the reference advance angle value by an advance angle correction value obtained by multiplying the correction amount by a predetermined proportional coefficient of the advance angle setting means.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: April 28, 2015
    Assignees: Minebea Co., Ltd., Panasonic Corporation
    Inventors: Tomohiro Inoue, Yuji Hamada
  • Publication number: 20150108938
    Abstract: The invention relates to an engine control for a synchronous motor having a number of N stator coils set off in regard to each other, which are arranged around a rotor of the synchronous motor, wherein there may be impressed upon the stator coils by the engine control a coil voltage and wherein there is formed a coil current having a direct current component in a co-ordinate system rotating proportionally with the number of revolutions performed by the synchronous motor as well as a cross current component, wherein the cross current component effects a tangential force activating the rotor in the direction of rotation and wherein the direct current component effects a force acting perpendicularly to the rotor surface on the rotor, wherein the engine control has a direct current generator for generating a direct current component periodically alternating in the rotating co-ordinate system, in order to neutralise oscillations of the synchronous motor activated by the engine control by means of the force generat
    Type: Application
    Filed: September 13, 2012
    Publication date: April 23, 2015
    Applicant: XYLEM IP HOLDINGS LLC
    Inventors: Karsten Laing, Herbert Grabner, Siegfried Silber
  • Patent number: 9013125
    Abstract: An electric power converter of an electric rolling stock includes: a converter unit (a first electric-power converting unit) that receives a direct-current voltage and outputs a direct-current voltage controlled to a predetermined value; and an inverter unit (a second electric-power converting unit) that is connected to the output side of the converter unit and drives an electric motor. The converter unit includes a converter control unit (a first control unit) that, based on the input voltage thereof, generates an output voltage command that is a control command for controlling the condition of the output voltage of the converter unit.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: April 21, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventor: Hidetoshi Kitanaka
  • Patent number: 9013129
    Abstract: An inverter device may include a converter unit configured to receive single phase AC power to output DC power; a capacitor unit configured to absorb the DC power; an inverter unit configured to synthesize the absorbed DC power to output the drive power of a load; and a converter controller configured to control the converter unit based on the AC power and the output DC power of the converter unit, wherein the converter controller includes a converter gate signal generator configured to control a plurality of gates contained in the converter unit; and an input line harmonic voltage generator configured to output converter additional power having a predetermined multiple of the frequency of the fundamental frequency component of the AC power with the same size as that of the fundamental frequency component of the AC power to an adder connected to the input side of the converter gate signal generator.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: April 21, 2015
    Assignee: LSIS Co., Ltd.
    Inventors: Seung Cheol Choi, Anno Yoo
  • Patent number: 8994318
    Abstract: An electrical on-board network of a vehicle, having at least two power circuits and an electrical machine allocated to a drive of the vehicle. The electrical machine has at least two phase systems, connected to a respective inverter, and that at least one of the phase systems is capable of being electrically connected to at least one of the power circuits via the associated inverter. A method for operating an electrical on-board network of a vehicle is also described.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: March 31, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Jochen Kurfiss, Sven Finke
  • Patent number: 8988030
    Abstract: This disclosure is drawn to methods, systems, devices and/or apparatus related to power control in applications over long cables. Specifically, the disclosed methods, systems, devices and/or apparatus relate to power control that considers the maximum power available at the end of a long cable (or from a battery) to a load over a broad range of load conditions. Some example systems may include a power supply located at the Earth's surface and a power converter coupled to the power supply via a cable having a first end coupled to the power supply and a second end coupled to the power converter. Some example power converters may be configured to measure the power being consumed by the electrical load in the well, and adjust operating parameter(s) of the electrical load based, at least in part, on the maximum power available at the second end of the cable.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: March 24, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Ramon Hernandez Marti, John Parry, Dudi Rendusara
  • Patent number: 8988021
    Abstract: A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage having a ripple of at least 50%, exciting a winding of the motor with the rectified voltage, and performing a first process or a second process in response to current in the winding exceeding a threshold that is proportional to the rectified voltage. The first process includes freewheeling the winding, while the second process includes continuing to excite the winding for an overrun period and freewheeling the winding at the end of the overrun period. Additionally, a control system that implements the method, and a motor system that incorporates the control system.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: March 24, 2015
    Assignee: Dyson Technology Limited
    Inventors: Andrew Charlton Clothier, Stephen Greetham, Nicholas Dalibor Tuftnell
  • Publication number: 20150077034
    Abstract: A rotor core includes magnet insertion holes embedding permanent magnets and arranged in a substantially U-shape, facing an outer circumferential surface of a rotor, and includes hollow portions formed at both side surface portions in a direction orthogonal to a magnetization direction of the permanent magnets embedded in the magnet insertion holes. A permanent magnet group for each pole having the plurality of permanent magnets includes vent holes passing through the rotor core in a direction of a rotating shaft, between one of the magnet insertion holes in which the permanent magnets are embedded and adjacent one of the magnet insertion holes or between the one of the magnet insertion holes and outer circumferential portions of the rotor core. The vent holes are arranged at positions to form the substantially U-shape together with the magnet insertion holes.
    Type: Application
    Filed: April 23, 2012
    Publication date: March 19, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kenta Kaneko, Moriyuki Hazeyama
  • Patent number: 8981689
    Abstract: In a driver, a discharging module discharges, at a discharging rate, the on-off control terminal of a switching element in response to a drive signal being shifted from an on state to an off state. A changing module determines whether a condition including a level of a sense signal being higher than a threshold level during the on state of the drive signal is met, and changes the discharging rate of the on-off control terminal in response to the drive signal being shifted from the off state to the on state upon determination that the condition is met. A loosening module loosens the condition after a lapse of a period since the shift of the drive signal from the off state to the on state in comparison to the condition immediately after the shift of the drive signal from the off state to the on state.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: March 17, 2015
    Assignee: Denso Corporation
    Inventors: Tomotaka Suzuki, Ryotaro Miura, Takeyasu Komatsu
  • Patent number: 8975856
    Abstract: An electric motor (40) has a permanent-magnet rotor (46) and an apparatus for generating a three-phase sinusoidal current (i202, i204, i206) for supplying current to said motor (40), also a microprocessor (95) for executing the following steps: while the motor (40) is running at a substantially constant load, the motor is operated firstly at a predetermined operating voltage (U), and an amplitude of a current flowing to the motor is iteratively sampled, stored, and compared as applied voltage is decreased. If it is found, in this context, that the current flowing to the motor has not decreased as a result of reduction in the voltage amplitude, the motor (40) is operated at that current. If, however, it is found that the current flowing to the motor has decreased as a result of the reduction in the voltage delivered to the motor (40), the measurements and the comparison are repeated, optionally multiple times, in order to identify values for optimized efficiency.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: March 10, 2015
    Assignee: EBM-PAPST St. Georgen GmbH & Co. KG
    Inventor: Markus Hirt
  • Patent number: 8970154
    Abstract: A resonance suppression control block includes a high-pass filter for extracting an AC component of DC link voltage, and a gain section for outputting a correction signal obtained by multiplying the AC component by a gain. A control unit controls an inverter based on a signal obtained by adding the correction signal to the voltage instruction. Thus, a power conversion apparatus with a simple configuration can be obtained that can suppress resonance of a DC link section and omit extra work for performing adjustment again in accordance with a power supply frequency.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: March 3, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shuta Ishikawa, Shinichi Furutani, Masanori Kato, Yoichi Egashira, Yuki Kawauchi
  • Patent number: 8970158
    Abstract: In one embodiment, a cryocooler drive circuit for a cryocooler motor is provided that includes: a first switching power converter configured to track a first sinusoidal input voltage signal to provide a first sinusoidal output voltage signal at a first output node; and a second switching power converter configured to track a second sinusoidal input voltage signal to provide a second sinusoidal output voltage signal at a second output node, wherein the second sinusoidal input voltage signal is an inverted version of the first sinusoidal input voltage signal such that the cryocooler motor is driven by an alternating current flowing between the first and second output nodes.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: March 3, 2015
    Assignee: FLIR Systems, Inc.
    Inventor: Louis David Chowning
  • Patent number: 8947031
    Abstract: A method for operating a direct current (DC) motor is shown and described. The method includes using pulse width modulated (PWM) DC output to control the speed of the DC motor. The method further includes sensing current output to the motor. When the sensed current exceeds a threshold, the method holds the PWM DC output off.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: February 3, 2015
    Assignee: Johnson Controls Technology Company
    Inventors: Russell W. Diamond, Gary A. Romanowich, David R. Fuhr
  • Patent number: 8941347
    Abstract: A converter control device comprises: a voltage-zero-cross detection unit detecting zero cross of the alternate-current voltage and outputting a voltage zero-cross signal; a power-source-current detection unit detecting a power source current of the alternate-current power source; a bus-line-voltage detection unit detecting a bus-line voltage between terminals of the smoothing capacitor; a PWM-signal generation unit generating a PWM-signal for on/off-controlling the switching unit, based on the power-source current, the bus-line voltage and a bus-line-voltage command value as a target voltage of the bus-line voltage; a power-source voltage-state detection unit detecting a signal state of the alternate-current voltage based on the voltage zero-cross signal; and a fundamental-switching-frequency selection unit selecting a fundamental switching frequency of the PWM-signal based on the signal state of the alternate-current voltage.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: January 27, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yu Otorii, Katsuhiko Saito, Masahiro Fukuda
  • Patent number: 8933654
    Abstract: A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage, exciting a winding of the motor with the rectified voltage and freewheeling the winding when current in the winding exceeds a threshold. The winding is freewheeled for a freewheel period, which is updated in response to a zero-crossing in the alternating voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: January 13, 2015
    Assignee: Dyson Technology Limited
    Inventors: Yu Chen, Tuncay Celik, Stephen Greetham
  • Patent number: 8917042
    Abstract: A drive circuit is provided for reducing conducted electromagnetic interference provided by a power line to a motor controller. The power line includes a first alternating current (AC) line output and a second AC line output. The drive circuit includes an EMI filter having a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input terminal is configured to be coupled to the first AC line output and the second input terminal is configured to be coupled to the second AC line output. The drive circuit further includes at least two series-coupled filter capacitors positioned after the EMI filter and a power factor correction (PFC) choke. The PFC choke is coupled at a first end to the second output terminal and at a second end between the series-coupled filter capacitors.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: December 23, 2014
    Assignee: Regal Beloit America, Inc.
    Inventors: Roger Carlos Becerra, Yao Da
  • Patent number: 8907612
    Abstract: A driving inverter for a multi-phase electric motor includes an alternating current (AC) generator, at least one AC sensor, a power supply line, a current sensor, an input, and a controller. The AC delivers current to a terminal block that is connectable to the phases of the electric motor. The at least one AC sensor is arranged on a certain phase or certain phases powering the electric motor. The current sensor is arranged on the power supply line and senses a current thereon. The input receives information that includes a torque demand setpoint and at least one limit current value of a power source. The controller drives phase currents of the electric motor according to the torque demand setpoint and by keeping the current of the power supply line at an acceptable value according to the at least one limit current value of the power source. With the arrangement of the driving inverter, a maximum current can always be imposed on the power source with no risk of degrading it.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: December 9, 2014
    Assignees: Compagnie Generale des Etablissements Michelin, Michelin Recherche et Technique S.A.
    Inventors: Jean-Louis Linda, Pierre Alain Magne, Cédric Savio
  • Patent number: 8907613
    Abstract: Disclosed are a system and a method for controlling a motor of an electric vehicle. In particular, an output voltage from a battery used to provide power to a motor of an electric vehicle, a speed and a torque of the motor are used to generate a magnetic flux based current control map. A current control command is then generated using the magnetic flux based current control map.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: December 9, 2014
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sung Kyu Kim, Wonkyoung Choi, Mu Shin Kwak, Suhyun Bae
  • Patent number: 8896260
    Abstract: A power supply unit for a press machine having a converter (converter circuit) connected to a commercial AC power supply, and an inverter (inverter circuit) connected to a press motor, includes an electrical energy bank, an inrush prevention circuit, an inrush prevention instruction signal generation section, and a contactor switch section, wherein contactors of the inrush prevention circuit are switched from on ON state to an OFF state and inrush prevention resistors of the inrush prevention circuit are connected to AC phase current paths on condition that the inrush prevention instruction signal generation section has generated and output an inrush prevention instruction signal (Sres) during press operation.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: November 25, 2014
    Assignee: Aida Engineering, Ltd.
    Inventor: Kazuhiro Kuboe
  • Patent number: 8896252
    Abstract: An electric motor driving device that drives an electric motor including a field winding, a rotor and a stator, wherein the rotor and the stator each form a field pole by passing a field current through the field winding, includes: a power supply device; a converter including a reactor that at least partially serves as the field winding shared with the electric motor, and configured to receive a voltage from the power supply device to carry out voltage conversion between first and second power lines and to pass the field current through the field winding during voltage conversion operation; an inverter configured to convert a direct-current power received from the converter to an alternating-current power for driving the electric motor; and a controller controlling the converter so that a current flows through the field winding in the same direction both during power running and regeneration of the electric motor.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: November 25, 2014
    Assignees: Toyota Jidosha Kabushiki Kaisha, National University Corporation Nagoya Institute of Technology
    Inventors: Eiji Yamada, Ryoji Mizutani, Nobuyuki Matsui, Takashi Kosaka
  • Patent number: RE45388
    Abstract: A compact field programmable gate array (FPGA)-based digital motor controller (102), a method, and a design structure are provided. The compact FPGA-based digital motor controller (102) includes a sensor interface (206) configured to receive sensor data from one or more sensors (104) and generate conditioned sensor data. The one or more sensors (104) provide position information for a DC brushless motor (108). The compact FPGA-based digital motor controller (102) also includes a commutation control (210) configured to create switching commands to control commutation for the DC brushless motor (108). The commutation control (210) generates commutation pulses from the conditioned sensor data of the sensor interface (206). The compact FPGA-based digital motor controller (102) also includes a time inverter (208) configured to receive the commutation pulses.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: February 24, 2015
    Assignee: Hamilton Sundstrand Space Systems International, Inc.
    Inventors: Robert Wichowski, Harold J. Hansen, Kevin G. Hawes