Voltage Control Patents (Class 318/504)
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Patent number: 11936310Abstract: The present disclosure provides a three-phase AC system and a control method thereof. The method includes: receiving an output signal of the three-phase AC system and obtaining a characteristic value of the output signal according to the output signal; performing virtual synchronous generator control on the inverter to obtain a fundamental electric potential; extracting a harmonic component from the output signal and obtaining an error signal according to the harmonic component and a reference value of the harmonic component; controlling the error signal to obtain a harmonic compensation electric potential; obtaining a control electric potential by superimposing the harmonic compensation electric potential with the fundamental electric potential; obtaining a pulse signal by modulating the control electric potential, and obtaining a switching signal of the inverter according to the pulse signal.Type: GrantFiled: April 22, 2021Date of Patent: March 19, 2024Assignee: Delta Electronics (Shanghai) CO., LTDInventors: Li Chen, Changyong Wang, Aibin Qiu
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Patent number: 11870375Abstract: A motor apparatus is provided. The motor apparatus includes a motor having a rotor and a stator, an inverter used to covert an input voltage into a three-phase alternating current (AC) voltage and provide the three-phase AC voltage to the motor, an inverter controller used to control the inverter, and a rotation angle sensor. The rotation angle sensor is fixed to the motor and is used to detect a rotation angle of the motor. The inverter controller includes a calculator. The calculator calculates an offset angle of an installation position of the rotation angle sensor according to a difference between a measured value and a theoretical value of a voltage phase of the motor.Type: GrantFiled: April 6, 2022Date of Patent: January 9, 2024Assignee: NIDEC ELESYS CORPORATIONInventors: Takashi Koikegami, Satoshi Shimazu, Yuhi Nakada
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Patent number: 11855553Abstract: Provided is a novel multi-level inverter with mixed device types and methods of controlling same. This novel multi-level inverter topology and control method allows the use of high frequency switching devices for controlled PWM switching, while also using lower frequency switching devices for directional switches. This combination of high frequency PWM switching devices with low frequency directional switching devices allows a cost reduction without a significant performance degradation.Type: GrantFiled: January 13, 2023Date of Patent: December 26, 2023Assignee: Imagen Energy, LLCInventors: Ezana T Mekonnen, Adel Nasiri, Jerry D. Thunes
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Patent number: 11695410Abstract: Herein disclosed is a voltage isolation circuit coupled to power supplies. The voltage isolation circuit comprises a series switch group controlled by a first control signal, a parallel switch group controlled by a second control signal, and a first high impedance element. The series switch group comprises a transistor arranged in a first current loop and having two channels connected to one of the power supplies respectively. The first high impedance element, coupled to the transistor in parallel, has a measurement terminal and two ends, connected to one of the power supplies respectively. When the series switch group is conducted, the power supplies are coupled in series in the first current loop. When the parallel switch group is conducted, the power supplies are coupled in parallel in a second current loop. Impedance values measured from the measurement terminal to each end of the first high impedance element are identical.Type: GrantFiled: September 19, 2021Date of Patent: July 4, 2023Assignee: Chroma ATE Inc.Inventors: Yung-Lin Chen, Szu-Chieh Su, Lien-Sheng Hung, Chun-Tai Cheng, Hsi-Ping Tsai, Szu-Hsin Yeh
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Patent number: 11682964Abstract: A driving circuit and a driving method are provided. The driving circuit includes an energy-storage capacitor, a first power converter and a bidirectional converter. An output port of the first power converter is coupled to a load and the energy-storage capacitor. The energy-storage capacitor is connected in parallel with the load. The bidirectional converter is coupled between the load and the energy-storage capacitor. The first power converter supplies power to the load during a light load interval. During at least a part of the light load interval, the first power converter charges the energy-storage capacitor via the bidirectional converter. During a heavy load interval, the first power converter supplies power to the load and the energy-storage capacitor supplies power to the load via the bidirectional converter. The driving circuit is applicable to drive a load requiring low average power and high peak power.Type: GrantFiled: August 12, 2021Date of Patent: June 20, 2023Assignee: SILERGY SEMICONDUCTOR TECHNOLOGY (HANGZHOU) LTDInventor: Kaiwei Yao
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Patent number: 11671043Abstract: A torque monitoring device is provided for a brushless AC motor. The device comprises an observer having inputs for voltages (Va, Vb, Vc) across windings of the brushless AC motor, having an input for an angular velocity (?s) of a rotor of the brushless AC motor, and an input for a pole wheel angle (?s) of the brushless AC motor.Type: GrantFiled: June 2, 2021Date of Patent: June 6, 2023Assignee: Hella GmbH & Co. KGaAInventor: Jean Doucement
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Patent number: 11658600Abstract: A motor controller 100-1 includes an inverter 23, a current detection unit 24, and a current detector 27. The motor controller includes a duty-cycle setting unit 31 that sets a duty cycle of each of a first PWM signal, a second PWM signal, and a third PWM signal, based on a corresponding detected value for a given phase. The motor controller includes a PWM signal generator 32. The PWM signal generator 32 adjusts, upon occurrence of a condition in which a given setting value changes, a time sequence order of timings at which the first PWM signal, the second PWM signal, and the third PWM signal respectively change after a change in the given setting value, to be the same as a time sequence order of timings at which the first PWM signal, the second PWM signal, and the third PWM signal respectively change prior to the change in the given setting value, so that a first energization time period and a second energization time period are ensured within half of one period of the carrier.Type: GrantFiled: March 23, 2020Date of Patent: May 23, 2023Assignee: MINEBEA MITSUMI Inc.Inventor: Reiji Yamasaki
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Patent number: 11552585Abstract: A method is for operating a three-phase cage motor on a multiphase electrical grid via a soft starter, with which one or more grid phases of the grid being respectively switchable by firing thyristors. Apart from a grid-related firing criterion, a rotor-flux-related firing criterion is taken into account.Type: GrantFiled: November 5, 2021Date of Patent: January 10, 2023Assignee: SIEMENS AKTIENGESELLSCHAFTInventors: Heiko Zatocil, Hauke Nannen
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Patent number: 11489458Abstract: This multi-phase converter control device performs PWM control on driving of a multi-phase converter. The multi-phase converter is configured such that a plurality of converters connected to each other in parallel have reactors, and the reactors are magnetically coupled with each other and step up an input voltage to generate a step-up voltage. This multi-phase converter control device includes a feedback control unit configured to perform feedback control such that the step-up voltage is a target voltage, a PWM control unit configured to generate a PWM signal on the basis of a voltage command value output from the feedback control unit, and a drive unit configured to drive the multi-phase converter on the basis of the PWM signal. The feedback control unit calculates a step-up ratio of the multi-phase converter and changes a control gain in the feedback control on the basis of the step-up ratio.Type: GrantFiled: December 15, 2020Date of Patent: November 1, 2022Assignee: HITACHI ASTEMO, LTD.Inventor: Takami Suzuki
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Patent number: 11341349Abstract: A fingerprint recognition device having a login circuit is provided in a terminal apparatus. A power button is configured to interwork with a contact, wherein a contact closing stroke of the power button is less than a maximum stroke of the power button. A fingerprint collection circuit is disposed on the power button and a power control circuit is coupled to the power button and configured to control power output to supply power to the fingerprint collection circuit when detecting that the power button is pressed. The power control circuit also controls power output to supply power to the fingerprint collection circuit when detecting that the contact is closed. The fingerprint collection circuit is configured to collect fingerprint data and send the fingerprint data to a fingerprint recognition circuit configured to receive the fingerprint data from the fingerprint collection circuit and match the fingerprint data with preset fingerprint data.Type: GrantFiled: April 28, 2017Date of Patent: May 24, 2022Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Chenglin Wu, Juntao Chen, Feipeng Shang
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Patent number: 10965207Abstract: A vehicle powertrain includes a direct-current (DC)-DC power converter and a controller. The DC-DC power converter includes first, second, and third legs in parallel, wherein the first leg is configured to carry a first DC current substantially equal to a sum of DC currents of the second and third legs. The controller may be configured to modulate switches of the first leg at a frequency greater than at least twice that of the second and third legs.Type: GrantFiled: February 26, 2018Date of Patent: March 30, 2021Assignee: Ford Global Technologies, LLCInventors: Baoming Ge, Lihua Chen, Shahram Zarei, Fan Xu
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Patent number: 10862418Abstract: A power conversion device includes first and second inverters connectable to at least one of first and second coil groups, a first separation relay circuit connected to the first inverter, a second separation relay circuit connected to the second inverter, a third separation relay circuit connected between the first separation relay circuit and the first coil group, a fourth separation relay circuit connected between the second separation relay circuit and the second coil group, and n connection lines to, for each phase, connect n nodes between the first and third separation relay circuits and n nodes between the second and fourth separation relay circuits, where n is an integer of 3 or more.Type: GrantFiled: January 10, 2018Date of Patent: December 8, 2020Assignee: NIDEC CORPORATIONInventor: Ahmad Ghaderi
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Patent number: 10601349Abstract: A motor actuating apparatus includes three phase connections for three motor phase connections, a high-connection for a supply voltage and a low-connection for a reference potential of the supply voltage, three bridge branches having a series connection of a high-switch and a low-switch and a control device for actuating the switches of the bridge branches. The high-switches are connected to the high-connection and the low-switches are connected to the low-connection. Each of the three phase connections is connected to exactly one of the three bridge branches between the high-switch and the low-switch. The control device is adapted for actuating the switches of the bridge branches such that during a first time period a first phase connection is switched to passive and the second phase connection and third phase connection are alternatingly connected to the high-connection and the low-connection in a predeterminable duty cycle if the supply voltage is applied.Type: GrantFiled: December 7, 2017Date of Patent: March 24, 2020Assignees: Airbus Defence and Space GmbH, Airbus Operations GmbHInventors: Joerg Wangemann, Heiko Rothkranz, Jens Schult
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Patent number: 10468995Abstract: A power converter includes a rectifier that converts AC power from an AC power supply into DC power, a short circuit unit that short-circuits the AC power supply via a reactor, and a controller that controls the short circuit operation of the short circuit unit. The controller changes the number of the short circuit operation during a half cycle of an output waveform of the AC power supply on the basis of a load condition, and causes a delay time before short circuit from a zero crossing point of the output waveform of the AC power supply after changing the number of the short circuit operation to vary from a delay time before short circuit from a zero crossing point of the output waveform of the AC power supply before changing the number of the short circuit operation.Type: GrantFiled: January 28, 2016Date of Patent: November 5, 2019Assignee: Mitsubishi Electric CorporationInventor: Tomomi Mochizuki
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Patent number: 10411634Abstract: Technical solutions are described for preventing controller windup in a motor control system. An example system includes a first anti-windup module that receives a commanded voltage and a limited voltage command. The limited voltage command is applied to an electric motor, where the first anti-windup module generates a first modified current command by modifying a current command that is applied to the motor control system. The modification is based on a ratio of the commanded voltage and the limited voltage command. The system further includes a second anti-windup module that receives the commanded voltage and the limited voltage command. The second anti-windup module generates a second modified current command by modifying the first modified current command. The modification based on a difference between the commanded voltage and the limited voltage command.Type: GrantFiled: November 28, 2017Date of Patent: September 10, 2019Assignee: Steering Solutions IP Holding CorporationInventors: Prerit Pramod, Zhe Zhang
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Patent number: 10256746Abstract: An actuation circuit for an inverter includes a direct voltage converter to convert direct current at a first voltage into direct current at an intermediate circuit voltage, and a driver unit that generates inverter control signals, based on direct current at the intermediate circuit voltage, to switch elements of the inverter. The actuation circuit also includes a discharge unit supplied with direct current at the intermediate circuit voltage, where the discharge unit switches, in response to a discharge control signal, a discharge resistor in parallel to an output of the direct voltage converter, and a control unit that is supplied with direct current at the intermediate circuit voltage. The control unit is configured to generate, for the discharging of the back-up capacitor, a discharge control signal that causes the discharge unit to switch the discharge resistor in parallel to the output of the direct voltage converter.Type: GrantFiled: March 7, 2018Date of Patent: April 9, 2019Assignee: Bayerische Motoren Werke AktiengesellschaftInventor: Michael Reiter
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Patent number: 10171021Abstract: Methods may involve determining a minimum voltage for a voltage command. A maximum voltage for the voltage command may be determined. A first representation of a first performance curve corresponding to the minimum voltage may be determined. A second representation of a second performance curve corresponding to the maximum voltage may be determined. An operating point to be achieved through the voltage command may be obtained. An evaluation may be made of whether the operating point lies between the first and second representations. When the operating point lies between the first and second representations, an interpolation may be conducted between the first and second representations to determine a magnitude of the voltage command.Type: GrantFiled: April 4, 2017Date of Patent: January 1, 2019Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Xin Jing, Brian A. Welchko, Constantin C. Stancu
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Patent number: 10103640Abstract: A power converter, including: at least two inverting modules, where direct current sides of the at least two inverting modules are connected in parallel using a laminated busbar or a circuit board, and the at least two inverting modules run in an interleaved and parallel manner. In the present invention, the power converter is formed by connecting at least two inverting modules in parallel, and the direct current sides of the at least two inverting modules are connected in parallel using the laminated busbar or the circuit board, so that parasitic inductance between inverting modules is small, forming a low parasitic inductance loop. When the at least two inverting modules run in an interleaved and parallel manner, the low parasitic inductance loop counteracts most ripple currents in a circuit, thereby reducing the burden of the ripple currents on a bus capacitor. Therefore, the demand of the power converter provided in the present invention for the bus capacitor is small.Type: GrantFiled: February 17, 2015Date of Patent: October 16, 2018Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Yazhu Zhao, Yunfeng Liu, Kai Xin
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Patent number: 10050571Abstract: A motor driving apparatus includes an inverter to convert a direct current (DC) voltage into an alternating current (AC) voltage through a switching operation and to output the AC voltage to a motor, an output current detector to detect an output current flowing in the motor, and a controller to control the inverter, wherein, at the time of starting the motor, the controller controls a first current, including a DC component and a high-frequency component, to be supplied to the motor during a first period for alignment of the motor, and controls a second current, including a DC component and a high-frequency component, to be supplied to the motor during a second period for alignment of the motor, and the controller calculates the stator resistance and inductance of the motor based on the first current and the second current. Consequently, it is possible to easily calculate the stator resistance and inductance of the motor during the alignment of the motor.Type: GrantFiled: May 20, 2016Date of Patent: August 14, 2018Assignee: LG ELECTRONICS INC.Inventor: Minho Jang
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Patent number: 10008937Abstract: Disclosed herein is an apparatus for controlling DC link voltage in power cells of a medium-voltage inverter. The apparatus controls DC link voltage in single-phase I/O power cells in the medium-voltage inverter, by way of using a first average power based on a positive sequence voltage and a positive sequence current to output a first DC link voltage reference for controlling the average value of the DC link voltages, and using a second average power based on a negative sequence voltage and a positive sequence current or a positive sequence voltage and a negative sequence current to output a second DC link voltage reference for controlling an interphase DC link voltage.Type: GrantFiled: November 1, 2017Date of Patent: June 26, 2018Assignee: LSIS CO., LTD.Inventors: Jong-Je Park, Seung-Ki Sul, Jeong-Mock Yoo, Hyun-Sam Jung
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Patent number: 9898018Abstract: An improved method for controlling an electrical distribution system of the type having a plurality of electrical sources, a load, a DC link coupling the electrical sources to the load and a control means for controlling the output of at least one of the plurality of electrical sources so that the plurality of sources deliver to the load an amount of power appropriate to the load. The improvement comprises an adaptation in respect of the load that provides for the DC link voltage to vary; and an adaptation of the control means resulting in the output being controlled as a direct function of the DC link voltage.Type: GrantFiled: March 14, 2013Date of Patent: February 20, 2018Assignee: Arda Power Inc.Inventors: Luis Zubieta, Clemens vanZeyl
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Patent number: 9887657Abstract: A controller for a switched reluctance machine is operated to close a switch which would otherwise be open so as to connect a phase winding to the DC link to which the winding is connected during other parts of the electrical cycle. This produces a condition which allows the insulation of the system to be monitored by applying a voltage between the DC link and ground.Type: GrantFiled: October 12, 2016Date of Patent: February 6, 2018Assignee: NIDEC SR DRIVES, LTDInventors: Michael Paul Tankard, Paul Andrew Sykes, Ian Jordison
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Patent number: 9621151Abstract: A driver IC includes a ring-shaped termination area, and a first area and a second area that are respectively arranged outside and inside the termination area on a layout. A sense MOS that is arranged between floating terminal and a first sense node and is driven at a power supply voltage is formed in the termination area. A fault detection circuit that detects presence of a fault when a voltage of the first sense node is higher than a decision voltage that has been deteLutined in advance in a period of time that a low side driver is driving a low side transistor into an ON state is formed in the first area.Type: GrantFiled: May 17, 2016Date of Patent: April 11, 2017Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Ryo Kanda, Koichi Yamazaki, Hiroshi Kuroiwa, Masatoshi Maeda, Tetsu Toda
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Patent number: 9543856Abstract: A power conversion apparatus has a structure in which the negative terminal of an insulated power supply is connected to one of connection nodes of a negative side bus with U-phase, V-phase and W-phase lower-arm switching elements except the end-side ones. That is the negative terminal of the insulated power supply is connected to the connection node between the negative side bus and the V-phase lower arm switching element to enable suppressing variations of input voltages supplied from the insulated power supply to respective drive circuits for driving the lower-arm switching elements by using low pass filters having smaller filtering capacity and smaller size.Type: GrantFiled: May 16, 2014Date of Patent: January 10, 2017Assignee: DENSO CORPORATIONInventor: Tomotaka Suzuki
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Patent number: 9510916Abstract: Surgical system, in particular a dental system including a surgical instrument, in particular a dental instrument and a device for controlling the electronic instrument. The device for controlling the electronic instrument includes a first electronic module. The instrument includes a rotary motor for driving the tool and a second electronic module. The rotary motor of the instrument is electrically powered by the first electronic module of the control device through the first electrical conductors dedicated to supply the rotary motor. The instrument is powered and/or electrically controlled by the first electronic module of the control device only through the second electrical conductors distinct from the first electrical conductors. The system also includes a management module of the second electrical conductors for sending on the second electrical conductors a number of signals larger to a number of second electrical conductors.Type: GrantFiled: June 6, 2013Date of Patent: December 6, 2016Assignee: DASSYM SAInventor: Jean-Pierre Voillat
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Patent number: 9461577Abstract: In some aspects, an actuation system includes an electrical positioning driver and an electrically-driven actuator. A voltage boost converter in the electrical positioning driver receives an input voltage. The voltage boost converter passes the input voltage to a voltage bus in the electrical positioning driver. The voltage on the voltage bus is converted to an actuator power signal that controls the electrically-driven actuator. The voltage boost converter boosts the voltage on the voltage bus to control a mechanical output performance of the electrically-driven actuator.Type: GrantFiled: December 1, 2015Date of Patent: October 4, 2016Assignee: Woodward, Inc.Inventor: David L. Ried
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Patent number: 9306487Abstract: A motor drive device driven by a three-phase AC, which drives a motor by an AC/DC converter and DC/AC converter controlled by a controller, and which has an electromagnetic contractor without an auxiliary contact in an input power circuit, which motor control device is provided at the controller with an off circuit of the electromagnetic contactor and a partial controller of the three-phase bridge circuit at the AC/DC converter, turns on an upper arm of a predetermined phase of the three-phase bridge circuit and turns on the lower arms of other phases in the state where the electromagnetic contactor is turned off, judges the presence of current in this state by the current detector, and, when the current detector detects current, uses a contact fusion detector to detecte contact fusion in the electromagnetic contactor and thereby can detect fusion of a contact in the electromagnetic contactor without an additional circuit.Type: GrantFiled: March 25, 2015Date of Patent: April 5, 2016Assignee: Fanuc CorporationInventor: Wataru Kuroki
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Patent number: 9041335Abstract: A driver circuit for driving an electrical load includes an input terminal pole connecting the driver circuit to an AC voltage source, an output terminal pole connecting the driver circuit to the load, a rectifier circuit connected to the input terminal pole for converting an AC voltage into a pulsating DC voltage, and a control element connected to the rectifier circuit and to the output terminal pole. The control element has a switch and a controller, the controller switching the switch on and off by means of a pulse train signal, wherein an electrical output value of the driver circuit is adjustable by switching the switch. The controller is configured to vary at least one time-based value of the pulse train signal within one period of the pulsating DC voltage such that a driver current is adjusted at the output terminal pole having a defined waveform within the period.Type: GrantFiled: March 20, 2013Date of Patent: May 26, 2015Assignee: C. & E. FEIN GMBHInventors: Martin Beichter, Mark Heilig, Ulf Rinckleb, Heinrich Steinhart
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Patent number: 9041334Abstract: A control system for an electric motor comprises a current sensing means arranged to produce a current sensing output indicative of electric current in the motor, current control means arranged to receive the current sensing output and to output a voltage demand indicative of voltages to be applied to the motor, and voltage demand correction means arranged to generate a correction signal and to use the correction signal and the voltage demand to produce a corrected voltage demand.Type: GrantFiled: April 14, 2011Date of Patent: May 26, 2015Assignee: TRW LimitedInventors: Connel Brett Williams, Christopher David Dixon, Robert James Huxford
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Publication number: 20150137725Abstract: A thrust reverser device for an aircraft includes at least two thrust reversers, and each of them includes a movable cowl movably actuated by an actuator driven by an electric motor. The electric motor is powered by a single power-conversion module including at least one autotransformer which is supplied with an alternating electric voltage and connected to at least one rectifier stage converting the alternating electric voltage into a direct voltage. The rectifier stage is connected to a current balancing stage and a current smoothing stage, supplying with the direct voltage the electric motor of the electric actuator of the movable cowl.Type: ApplicationFiled: December 19, 2014Publication date: May 21, 2015Inventors: Hakim MAALIOUNE, Alain NOURRISSON
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Patent number: 9035588Abstract: A brushless motor driving apparatus that rotates and drives a brushless motor, which has a plurality of coils, by switching energization modes corresponding to phases of the brushless motor, sequentially switches the energization modes based on a non-energized phase voltage and a voltage threshold. Also, the brushless motor driving apparatus regulates an upper threshold for energization amount based on the voltage threshold and a change in the non-energized phase voltage at timing of switching the energization mode.Type: GrantFiled: September 13, 2012Date of Patent: May 19, 2015Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Masaki Hano, Naoki Okamoto
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Publication number: 20150115858Abstract: A phase compensation apparatus in an inverter output voltage in a system is provided, whereby performance of an inverter can be enhanced by compensating a time delay of measured voltage of inverter output voltage detection unit.Type: ApplicationFiled: October 20, 2014Publication date: April 30, 2015Applicant: LSIS CO., LTD.Inventors: Seungcheol CHOI, Anno YOO
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Publication number: 20150115857Abstract: A power tool is disclosed having a compact AC switch assembly. An electric motor driving the power tool is contained within a housing that includes a handle. A trigger is slidingly received in the handle and moves in an axis of trigger travel along a trigger travel distance extending between an extended position of the trigger and a depressed position. A trigger switch including a printed circuit board is disposed in mechanical communication with the trigger and controls the electric motor in accordance with trigger position. The printed circuit board has a plurality of conductive traces that are sequentially arranged and linearly aligned adjacent the trigger in a direction that is transverse to the axis of trigger travel to reduce the width of the printed circuit board to a value that is less than or equal to three times the trigger travel distance.Type: ApplicationFiled: October 25, 2013Publication date: April 30, 2015Applicant: Black & Decker Inc.Inventors: Oleksiy P. Sergyeyenko, Timothy W. French, Phillip Martinez, Yesman Wang
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Publication number: 20150115859Abstract: A circuit allows an energy efficient DC design to drop in to an AC application and interface directly with the AC signals in a cost effective manner. The circuit is implemented without any use of mechanically switched contacts. All switching of current is done through solid state devices. Positional feedback and speed of the motor is provided through an optically encoded output gear eliminating the need for mechanical position switches to determine motor rotational position.Type: ApplicationFiled: October 30, 2014Publication date: April 30, 2015Inventors: Michael Edward Stagg, Li Yi Situ
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Publication number: 20150108936Abstract: A charging circuit for at least one bootstrap charge storage element within an inertial load driver circuit is described, the at least one bootstrap charge storage element comprising a first node operably coupled to an output node of at least one switching element of the inertial load driver circuit.Type: ApplicationFiled: June 5, 2012Publication date: April 23, 2015Applicant: Freescale Semiconductor, Inc.Inventor: Thierry Sicard
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Publication number: 20150108935Abstract: A method performed in a power bridge (3) comprising multiple arms (B1, B2, Bi, Bn). Each arm comprises upper and lower semiconductor switches arranged in series and connected in parallel to first and second terminals (B+, B?) of a common voltage source (2). The mid-point of the arm is connected to a phase of an electrical load (1). The aforementioned switches are controlled complementarily by pulses having a duty factor set value (RC1, RC2, RCi, RCn) determined as a function of a first phase voltage set value (V1, V2, Vi, Vn) in relation to a reference terminal of the electrical load (1) and of a common-mode voltage (V0) in relation to one of the first or second terminals, such as to control the switching losses of the switches. The common-mode voltage (V0) is determined such as to balance switching losses and conduction losses between the switches.Type: ApplicationFiled: March 4, 2013Publication date: April 23, 2015Inventor: Michaël Chemin
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Patent number: 9013129Abstract: 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: GrantFiled: August 28, 2013Date of Patent: April 21, 2015Assignee: LSIS Co., Ltd.Inventors: Seung Cheol Choi, Anno Yoo
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Publication number: 20150102758Abstract: There are provided a motor drive controller, a motor drive control method, and a motor system using the same. The motor drive controller may include: a voltage-vector providing unit generating voltage vectors having the same magnitude; an inverter unit applying the voltage vectors to multiple phases of a motor device; and a rotor position determining unit detecting currents generated in the motor device by the voltage vectors and determining a position of a rotor of the motor device by using the currents and rotation information of the motor device.Type: ApplicationFiled: January 21, 2014Publication date: April 16, 2015Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventor: Su Yeon HAN
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Publication number: 20150102759Abstract: A power conversion device includes a switching control unit that controls respective switching elements constituting a plurality of chopper circuits, a rectified-voltage detection unit, a bus-bar voltage detection unit, and a bus-bar current detection unit. The switching control unit includes an on-duty calculation unit that calculates a reference on-duty of respective drive pulses with respect to the switching elements based on a bus-bar voltage and a bus-bar current, an on-duty correction unit that corrects the reference on-duty to output on-duties of the respective drive pulses based on the bus-bar current, so that change amounts of respective reactor currents become substantially the same, and a drive-pulse generation unit that generates the respective drive pulses, based on the respective on-duties.Type: ApplicationFiled: February 26, 2013Publication date: April 16, 2015Applicant: Mitsubishi Electric CorporationInventors: Takuya Shimomugi, Michio Yamada, Yosuke Shinomoto, Mitsuo Kashima, Shigeo Umehara
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Patent number: 9007009Abstract: In a motor control apparatus for controlling an AC motor with an inverter, a current estimation value is calculated based on a current detection value of one phase of the motor and a rotation angle of the motor. A difference between a current command value related to driving of the AC motor and the current estimation value is calculated. A first voltage command value used to generate a drive signal related to driving of the inverter is calculated based on the difference. A sign of the difference is reversed at a reverse interval when the rotation speed is not greater than a determination threshold.Type: GrantFiled: February 6, 2014Date of Patent: April 14, 2015Assignee: Denso CorporationInventors: Ryuji Omata, Takeshi Itoh, Hirofumi Kako
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Publication number: 20150097507Abstract: A motor driving apparatus may include a bidirectional converter including an energy storage unit and converting power bidirectionally; an inverter receiving the power from the bidirectional converter and driving a motor; and a power passing unit transferring energy stored in the energy storage unit of the bidirectional converter to the inverter.Type: ApplicationFiled: May 1, 2014Publication date: April 9, 2015Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.Inventors: Han Tae KIM, Min Sup SONG, Kyeoung Hun PARK
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Publication number: 20150097506Abstract: A three phase step-up autotransformer construction is discussed herein. The passive 12-pulse AC-DC converter offers simplicity, high reliability and low cost solution to AC-DC power conversion. The autotransformer is a component of the passive 12-pulse AC-DC converter. The autotransformer converts three-phase AC power into six-phase AC power. With appropriate vector design, the autotransformer may be configured to draw a near sinusoidal 12-pulse current waveform from the three-phase voltage source. The six-phase output may be configured to drive a rectifier (non-linear) load.Type: ApplicationFiled: January 23, 2014Publication date: April 9, 2015Applicant: HAMILTON SUNDSTRAND CORPORATIONInventors: FRANK Z. FENG, MUSTANSIR KHERALUWALA, WALEED M. SAID
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Patent number: 9000707Abstract: Apparatuses and methods are described for implementing adjustable speed drives. For instance, an apparatus may comprise an inverter circuit configured to drive a multi-phase electrical load, the inverter configured to be powered by first and second direct-current (DC) bus lines, a fan drive circuit configured to be powered by the first and second DC bus lines, a fan configured to be controlled by the fan drive circuit and having a plurality of windings coupled together at an electrical node, a first capacitor having a first terminal coupled to the first DC bus line and a second terminal coupled to the electrical node, and a second capacitor having a first terminal coupled to the second DC bus lines and a second terminal coupled to the electrical node.Type: GrantFiled: October 16, 2012Date of Patent: April 7, 2015Assignee: Toshiba International CorporationInventors: Mohammed Arefeen, Mark Rayner
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Publication number: 20150077030Abstract: A dual inverter system to drive a motor in an electronic apparatus and a method of controlling the same include a first inverter connected to one side of a stator winding of the motor to modulate a pulse width and to adjust power supplied to the motor, a second inverter connected to the other side of the stator winding of the motor to modulate a pulse width and to adjust power supplied to the motor, a first current detector connected to the first inverter to detect a current flowing in the first inverter, a second current detector connected to the second inverter to detect a current flowing in the second inverter, and a controller to control the motor by controlling a pulse-width modulation (PWM) signal applied to the first inverter or the second inverter based on the current flowing in at least one of the first inverter and the second inverter.Type: ApplicationFiled: June 9, 2014Publication date: March 19, 2015Inventors: Sang-Yoon SOH, Young-Doo YOON, Oh-Hyuk KWON, Jang-Hwan KIM, Jeong-Hyoun SUNG, So-Hee HAN
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Patent number: 8970152Abstract: An exemplary power supply assembly includes a drive device having a bus capacitor. A switch associated with an input side of the drive device selectively connects the drive device to a power supply. An inductor has an impedance that limits an amount of current supplied to the bus capacitor during an initial charging of the bus capacitor when the switch connects the input side of the drive device to the power supply. A restrictive circuit portion dampens a resonance effect of the inductor. The restrictive circuit portion has a resistance that allows the bus capacitor to charge quickly. The impedance of the inductor has a more significant effect on how quickly the bus capacitor charges than an effect of the resistance. A dampening factor of the restrictive circuit controls a voltage of the bus capacitor during the charging of the bus capacitor.Type: GrantFiled: July 30, 2010Date of Patent: March 3, 2015Assignee: Otis Elevator CompanyInventors: Daryl J. Marvin, Michael Mann, Steven M. Millett
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Patent number: 8970154Abstract: 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: GrantFiled: November 1, 2011Date of Patent: March 3, 2015Assignee: Mitsubishi Electric CorporationInventors: Shuta Ishikawa, Shinichi Furutani, Masanori Kato, Yoichi Egashira, Yuki Kawauchi
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Publication number: 20150054443Abstract: As described herein, a drive circuit for a three phase AC motor comprises an AC/AC converter. The converter has an input for receiving multiphase AC power from an AC source and converting the AC power to variable voltage and variable frequency from the AC source for driving the AC motor. A filter circuit is connected to the AC/AC converter and comprises at least one inductor per phase and at least one capacitor per phase. The capacitors are connected in a broken wye configuration with one side connected to one of the inductors and an opposite side connected via a three phase diode bridge rectifier to a switch. The switch is controlled by a converter control to selectively open or short a neutral point of the broken wye capacitor configuration.Type: ApplicationFiled: August 22, 2013Publication date: February 26, 2015Applicant: Yaskawa America, Inc.Inventor: Mahesh M. Swamy
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Publication number: 20150048770Abstract: A current sensing circuit may include a shunt resistance through which current to be sensed travels. A first and a second differential amplifier may each provide an amplified output of the voltage across the shunt resistance. A switching system may deliver a current sensing signal output based on the amplified output of the first differential amplifier when the common mode voltage across the shunt resistance is low and based on the amplified output of the second differential amplifier when the common mode voltage across the shunt resistance is high. The first differential amplifier may provide its lowest output DC offset voltage when the common mode voltage is low, while the second differential amplifier may provide its lowest output DC offset voltage when the common mode voltage is high. The first and second differential amplifiers may both have a low common mode voltage rejection ratio, such as a ratio of less than 40 db at the switching frequency of switches that control the current that is sensed.Type: ApplicationFiled: January 6, 2014Publication date: February 19, 2015Applicant: Linear Technology CorporationInventors: Kristiaan B. Lokere, Brendan J. Whelan
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Publication number: 20150042255Abstract: In some aspects, an actuation system includes an electrical positioning driver and an electrically-driven actuator. A voltage boost converter in the electrical positioning driver receives an input voltage. The voltage boost converter passes the input voltage to a voltage bus in the electrical positioning driver. The voltage on the voltage bus is converted to an actuator power signal that controls the electrically-driven actuator. The voltage boost converter boosts the voltage on the voltage bus to control a mechanical output performance of the electrically-driven actuator.Type: ApplicationFiled: August 9, 2013Publication date: February 12, 2015Applicant: Woodward, IncInventor: David L Ried
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Publication number: 20150028788Abstract: A method of controlling a motor is provided. The method may determine one of a switching period, a fundamental cycle, and a current target per phase leg of the motor having at least one high voltage transition point; determine a dwell period to be enforced at the transition point between an engagement of a first switch of the phase leg and an engagement of a second switch of the phase leg where each of the first switch and the second switch may be selectively engageable between a first state and a second state; engage the first switch from the first state to the second state at the transition point; and engage the second switch from the first state to the second state after the transition point and upon expiration of the dwell period.Type: ApplicationFiled: July 25, 2013Publication date: January 29, 2015Applicant: Caterpillar, Inc.Inventors: Jackson Wai, Ahmed Khalil, Carlos Nino Baron, Jesse Gerdes, Brad A. Kough