Three Phase Motor Operated From Single Phase Source Patents (Class 318/768)
  • Patent number: 11081996
    Abstract: This application generally relates to electric machines with coils or windings (e.g., generators and motors), and more particularly to systems, apparatus, and methods that configure coils or windings of electric machines, for instance dynamically in response to operational condition and under load.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: August 3, 2021
    Assignee: DPM Technologies Inc.
    Inventor: Jonathan Gale Ritchey
  • Patent number: 10931205
    Abstract: A phase converter that converts single phase AC electric power to balanced three phase AC power. Two input terminals are connectable to a single phase AC power source, and connect directly to two output terminals of the converter. The phase converter has a storage capacitor, three active half bridge modules connected to the storage capacitor and a controller. Two modules connect to the input terminals and charge the storage capacitor. The other module connects to a third output terminal. The controller switches the module connected to the third output terminal and one of the other modules to generate and shape a second phase and a resultant third phase.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: February 23, 2021
    Assignee: Phase Technologies, LLC
    Inventors: Peda V Medagam, Jack Yang
  • Patent number: 10622925
    Abstract: To estimate a magnet magnetic flux or a magnet temperature with higher accuracy during a three-phase short circuit operation, than in a case only a d-axis current is used. A control device includes a phase short circuit unit for short-circuiting three-phase terminals of a permanent-magnet-type synchronous machine having a permanent magnet. During three-phase short circuit operation in which the three-phase terminals are short-circuited by the phase short circuit unit and the permanent-magnet-type synchronous machine is operated, the control device estimates a magnet state of the permanent magnet on the basis of a d-axis current, a q-axis current and a magnetic characteristic.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: April 14, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Fumiaki Takagi, Takahiko Kobayashi, Masahiro Iezawa
  • Patent number: 10509079
    Abstract: An inverter test apparatus includes a DC power supply, a second inverter which is connected to a DC side of the first inverter, an inductor which is connected between an AC side of the first inverter and an AC side of the second inverter, a first controller which controls an AC voltage of the first inverter to be at a constant amplitude and a constant frequency, a current detector which detects a current that flows through the inductor, a phase command value computation module which computes a phase command value of the second inverter so as to control the current detected by the current detector, and a second controller which controls a phase of the second inverter, based on the phase command value computed.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: December 17, 2019
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Naoto Niimura, Toshiaki Oka, Hiromitsu Suzuki
  • Patent number: 10371159
    Abstract: An object of the present invention is to provide a magnetic bearing device designed to achieve reduction in cost and size of a circuit by omitting a DC/DC converter that has been used for obtaining a control power voltage of a magnetic bearing, and to provide a vacuum pump having the magnetic bearing device.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: August 6, 2019
    Assignee: Edwards Japan Limited
    Inventor: Toshiaki Kawashima
  • Patent number: 10333420
    Abstract: A phase converter that converts single phase AC electric power to balanced three phase AC power. Two input terminals are connectable to a single phase AC power source, and connect directly to two output terminals of the converter. The phase converter has a storage capacitor, three active half bridge modules connected to the storage capacitor and a controller. Two modules connect to the input terminals and charge the storage capacitor. The other module connects to a third output terminal. The controller switches the module connected to the third output terminal and one of the other modules to generate and shape a second phase and a resultant third phase.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: June 25, 2019
    Assignee: Phase Technologies, LLC
    Inventors: Peda V. Medagam, Jack Yang
  • Patent number: 10158299
    Abstract: A power conversion system, a non-transitory computer readable medium, and a method of operating a power conversion system, in which inverter switching control signals are generated in a first mode according to an inverter carrier signal having an inverter switching frequency, and according to inverter modulation signals, to operate switches of an inverter to provide an AC output signal, and the inverter modulation signals are shifted in a second mode for low modulation index values to reduce common mode voltage.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: December 18, 2018
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Lixiang Wei, Yujia Cui
  • Patent number: 9979317
    Abstract: A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are high1.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: May 22, 2018
    Assignee: DAIHEN Corporation
    Inventors: Nobuyuki Hattori, Akihiro Ohori, Hiroki Munechika
  • Patent number: 9762160
    Abstract: A generator system configured to be connected in parallel with other generators is disclosed. The generator system includes an alternator having a stator with an output winding and a quadrature winding and a rotor with a three-phase winding. The rotor of the alternator is rotatably driven by an engine having a controller to regulate the engine speed. An inverter receives power from the quadrature winding and generates an AC voltage for the rotor winding. The inverter receives an input corresponding to the voltage on the output winding of the stator and also receives an input corresponding to the phase angle of a second AC voltage produced by another power source. The inverter controls the frequency of the AC voltage for the rotor winding such that the phase angle of the voltage on the output winding of the stator is synchronized to the phase angle of the second AC voltage.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: September 12, 2017
    Assignee: Generac Power Systems, Inc.
    Inventor: Tod R. Tesch
  • Patent number: 9752384
    Abstract: An electric horizontal directional drilling machine. An electric horizontal directional drilling machine is powered by an electric power assembly. The power assembly is made up of a fuel cell and inverter, or multiple fuel cells with synchronized inverters. The electric motor operates hydraulic pumps or works independently to rotate, advance and retract a drill string and downhole tool through the earth and operate various machine functions. Mechanical functions of the drilling machine may also be satisfied through the use of electric rotary actuators (e.g., motors) and linear actuators (e.g., linear motors and solenoids).
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: September 5, 2017
    Assignee: The Charles Machine Works, Inc.
    Inventor: Michael F. Gard
  • Patent number: 9718364
    Abstract: The disclosure relates to a drive system for an electric vehicle, comprising an electric motor, a traction battery for supplying the electric motor, an asynchronous machine, and a combustion engine for driving the asynchronous machine, wherein the asynchronous machine is arrange for charging the traction battery upon a control signal to extend the range of the electric vehicle. The traction battery has a plurality of a battery lines having adjustable output voltage for generating voltage progressions which are phase-shifted relative to one another, and each battery pack line is not only provided for supplying one of the phase connections of the electric motor but is also connected to a phase connection of the asynchronous machine. The disclosure further relates to a corresponding method for charging a traction battery having a plurality of battery lines by means of an asynchronous machine and a combustion engine disposed in series therewith.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: August 1, 2017
    Assignees: Robert Bosch GmbH, Samsung SDI Co., Ltd.
    Inventors: Joachim Fetzer, Stefan Butzmann
  • Patent number: 9654036
    Abstract: There is provided a power conversion device including a plurality of Direct Current (DC) power sources (VB) that converts an output voltage of each of the DC power sources into an Alternating Current (AC) voltage, and outputs the converted AC voltage in series connection, and the device includes: a DC/DC converter (21) connected to each of the DC power sources (VB) to convert the output voltage of the DC power sources; a control device (31) that controls an output voltage of the each DC/DC converter (21); and an H-bridge circuit (22) provided on the output side of the DC/DC converter (21) to convert the voltage output from the DC/DC converter (21) into an AC voltage.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: May 16, 2017
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Yusuke Zushi, Jon C. Clare, Alan Watson
  • Patent number: 9590483
    Abstract: An optimized structure of an arm capacitor voltage balance controller based on chain links of the H-bridge module that achieves enhanced performance of an arm capacitor voltage balance control in all operational conditions, even with highly dynamic loads. Such a controller has application in three-phase STATCOM converters, and may be structured so as to seamlessly integrate feedforward and feedback controls with inverse maps used for calculation of the zero sequence reference voltage injection(s) (for star and delta STATCOM topologies).
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: March 7, 2017
    Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD
    Inventor: Duro Basic
  • Patent number: 9083235
    Abstract: Methods and apparatus for converting a single phase power supply source into a three phase power supply source. The single phase power supply source is utilized as a first output of the three phase power supply source, while the second and third outputs of the three phase power supply source are created utilizing part of the single phase power supply source combined with a phase shifting inverting circuit.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: July 14, 2015
    Assignee: SET ELECTRICAL ENGINEERING PTY LTD.
    Inventor: Shmuel Steinberg
  • Patent number: 9007002
    Abstract: A power-saving driving device is provided for a device 23 having the same load pattern and driven by a motor 21 receiving electric power from an inverter 19. The power-saving driving device includes a DC-DC converter 93 driven by a battery 91 and the inverter driven by an output of the DC-DC converter. The power-saving driving device further includes an electric power amount W calculator 81 that calculates an electric power amount received from the battery in the same load pattern, and a parameter selection/instruction unit 83 that causes a parameter (carrier wave frequency instruction value F and output voltage instruction value G) of the inverter to change to be a plurality of values, compares the received electric power amounts respectively corresponding to the values of the parameter, selects the parameter value minimizing the received electric power amount, and instructs the selected parameter value to the inverter.
    Type: Grant
    Filed: June 13, 2011
    Date of Patent: April 14, 2015
    Assignee: IHI Corporation
    Inventor: Motonao Niizuma
  • Publication number: 20150084575
    Abstract: A motor controller architecture and method of operating the same. The motor controller includes a function for estimating the low speed operation of the motor, for example by evaluating the response to a periodic excitation signal injected into the control loop of the controller architecture. A periodic excitation signal in the form of a square wave allows for analysis of the response of the motor without requiring demodulation, which allows the frequency of the excitation signal to be above the audible range. Control logic for controlling the motor at transitional speeds between low speed control and high speed (back emf) control is provided in some embodiments.
    Type: Application
    Filed: July 22, 2014
    Publication date: March 26, 2015
    Inventor: David Patrick Magee
  • Publication number: 20150084576
    Abstract: A motor controller architecture and method of operating the same. The motor controller includes a function for estimating the low speed operation of the motor, for example by evaluating the response to a periodic excitation signal injected into the control loop of the controller architecture. A periodic excitation signal in the form of a square wave allows for analysis of the response of the motor without requiring demodulation, which allows the frequency of the excitation signal to be above the audible range. Control logic for controlling the motor at transitional speeds between low speed control and high speed (back emf) control is provided in some embodiments.
    Type: Application
    Filed: July 22, 2014
    Publication date: March 26, 2015
    Inventor: David Patrick Magee
  • Patent number: 8704471
    Abstract: A zero-cross detection unit monitors an AC voltage detected by a voltage sensor, generates a zero-cross point signal when the voltage crosses 0V, and supplies the signal to a controller. A rotation number setting unit sets a rotation number command to serve as a target of a synchronous motor. A rotation number correction coefficient data table stores correction coefficient data for a target rotation number. A correction coefficient data extraction unit extracts correction coefficient data in accordance with an elapsed time of the zero-cross point signal generated by the zero-cross detection unit from a rotation number correction coefficient data table, and outputs the data to a corrected rotation number creation unit. The corrected rotation number creation unit corrects the rotation number set by the rotation number setting unit in accordance with the extracted correction coefficient data, and outputs the corrected rotation number to a sine wave data creation unit.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: April 22, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hiroyuki Kameyama
  • Patent number: 8508162
    Abstract: Disclosed is a system and a method for controlling torque of induction motor in electric vehicle. The system and method for controlling torque of induction motor in electric vehicle according to the present disclosure has an advantageous effect in that torque control problems caused by saturation of magnetic flux, parameters of induction motor and changes in battery voltages during control of torque in the induction motor can be solved using a look-up table (a type of data table), thereby enhancing accuracy in torque control and improving travel performance and fuel efficiency of the electric vehicle.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: August 13, 2013
    Assignee: LSIS Co., Ltd.
    Inventors: Gi Young Choi, Sun Woo Lee
  • Publication number: 20130088177
    Abstract: A power-saving driving device is provided for a device 23 having the same load pattern and driven by a motor 21 receiving electric power from an inverter 19. The power-saving driving device includes a DC-DC converter 93 driven by a battery 91 and the inverter driven by an output of the DC-DC converter. The power-saving driving device further includes an electric power amount W calculator 81 that calculates an electric power amount received from the battery in the same load pattern, and a parameter selection/instruction unit 83 that causes a parameter (carrier wave frequency instruction value F and output voltage instruction value G) of the inverter to change to be a plurality of values, compares the received electric power amounts respectively corresponding to the values of the parameter, selects the parameter value minimizing the received electric power amount, and instructs the selected parameter value to the inverter.
    Type: Application
    Filed: June 13, 2011
    Publication date: April 11, 2013
    Applicant: IHI CORPORATION
    Inventor: Motonao Niizuma
  • Patent number: 8373378
    Abstract: In various embodiments, the present disclosure provides a speed control system for a motor that includes a fixed speed control portion and a variable speed control portion. The fixed speed control portion is operable to control a speed of a motor in a fixed speed mode wherein the motor is operated at a preselected fixed speed below a predetermined fixed speed mode threshold speed. The variable speed control portion is operable to control the motor in a variable speed mode wherein the motor is operated such that a speed of the motor can be selectively varied within a range between the fixed speed mode threshold speed and a maximum motor speed. The system additionally includes a switching device structured and operable to selectively switch the speed control system between the fixed speed mode and the variable speed mode.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: February 12, 2013
    Inventor: Robert E. Steiner
  • Publication number: 20120249045
    Abstract: A medium voltage inverter system is disclosed, the system including a coupled reactor magnetically connecting first and second reactors each connected to an output of first and second medium voltage inverters for driving a motor.
    Type: Application
    Filed: March 1, 2012
    Publication date: October 4, 2012
    Applicant: LSIS CO., LTD.
    Inventor: Kyungsue KIM
  • Patent number: 8264191
    Abstract: A motor drive system using a current source inverter (CSI) for providing the main power and an active filter for providing the reactive power and harmonics is disclosed. The CSI can be a load-commutated inverter (LCI) build using silicon-controlled rectifiers (SCRs), while the active filter can be based on a voltage-controlled inverter. An LCI circuit comprising of SCRs, wherein CSI is autosequentially turned off is provided. In other words, the negative voltage for turning the SCR off is not load dependent. A control scheme for operating the motor drive system through proper control of the SCRs in the LCI circuit is also provided. As presented, the motor drive system is able to feed medium to high voltage motors using a simple circuit, such that low-frequency torque pulsations are eliminated.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: September 11, 2012
    Assignee: Indian Institute of Science
    Inventors: Vilianguppam Thathachary Ranganathan, Sowmithri Ranganathan, legal representative, Debmalya Banerjee
  • Publication number: 20120223667
    Abstract: A power conversion apparatus includes main circuits, in which switching elements are connected in parallel with diodes, respectively. An auxiliary circuit, which is formed of a series-connected second switching element and a capacitor, is connected in parallel with the diode operating as a freewheeling diode. The switching element of the main circuit, which is opposite to the auxiliary circuit, is set to turn on at a reference time. The second switching element of the auxiliary circuit is set to turn on in advance of the reference time by an interval of a discharging time period of the capacitor in a dead time period.
    Type: Application
    Filed: March 1, 2012
    Publication date: September 6, 2012
    Applicant: DENSO CORPORATION
    Inventors: Fan WANG, Tomonori KIMURA, Atsushi KOBAYASHI, Hideaki ISHIHARA, Masakiyo HORIE
  • Patent number: 8084976
    Abstract: A motor control device performing vector control for a motor that drives a load whose load torque varies periodically. The motor control device has: a motor speed deriving portion estimating or detecting a motor speed; a speed controller producing a specified torque current value such that the motor speed is made to follow a specified motor speed value fed from outside; a resonance filter producing a corrected torque current value by receiving a control value that varies with variations in the load torque and emphasizing a periodic variation component of the control value; a torque current corrector producing a specified superimposed torque current value by superimposing the corrected torque current value on the specified torque current value; and an adjusting portion adjusting, based on the specified superimposed torque current value, a degree of emphasis placed on the variation component by the resonance filter. The vector control is performed according to the specified superimposed torque current value.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: December 27, 2011
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Eiichiro Hashimoto
  • Patent number: 8065050
    Abstract: A method is provided for detecting an insufficient or missing phase current in a permanent magnet synchronous motor, and includes determining a composite vector position of a combined three-phase phase current with respect to a stationary portion of the motor, and assigning a sector to the position. The method includes comparing the phase current to a calibrated threshold current corresponding to the sector, and executing a response when the absolute value is less than the threshold. A vehicle includes an energy storage device (ESD), a motor/generator configured as a permanent magnet synchronous motor, a voltage inverter, and a bus for conducting DC current from the ESD to the inverter. A controller detects an insufficient phase current, determines a current vector position of the three-phase AC, assigns a sector to the position, and executes a response when an absolute value of the phase current is less than a calibrated threshold.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: November 22, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Stephen T. West, Wei D. Wang, Sean E. Gleason
  • Patent number: 7902791
    Abstract: A controller for operating a variable speed alternating current motor using inverters to which power is supplied from two or more power supplies including an energy accumulator has a first inverter for converting direct current supplied from the outside into alternating current, a power supply for accumulating direct current, a second inverter for converting direct current supplied from the power supply into alternating current, and an adder for adding the alternating current voltages outputted from the first and second inverters.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: March 8, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideto Negoro, Satoru Sone
  • Patent number: 7859217
    Abstract: A motor controller system comprises solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the motor. Sensors sense power from the static converter. A control is connected to the sensors and the solid state switches for controlling operation of the solid state switches to run the motor. The controller includes a three phase detection scheme for preventing operation of the solid state switches in the absence of desired three phase power from the static converter. A motor start scheme disables the three phase detection scheme for a select time after a motor run signal.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: December 28, 2010
    Assignee: Siemens Industry, Inc.
    Inventor: Scott Mayhew
  • Patent number: 7855526
    Abstract: In the present invention, when configuring a control system of an inverter performing power conversion between AC and DC, a frequency computation is performed based on biaxial voltage amounts obtained through two current regulators in such a way that each of biaxial component currents obtained by detecting an AC circuit current and performing a rotational coordinate transformation matches each respective command value and phase information in synchronization with an electromotive force power supply of the AC circuit is obtained by integrating the frequency to perform the rotational coordinate transformation of the AC current and also the inverter is caused to operate by generating a PWM switching signal from the biaxial voltage amounts to perform necessary power conversion control.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: December 21, 2010
    Assignee: The University of Tokushima
    Inventors: Tokuo Ohnishi, Kenji Yamanaka, Eiji Gohda
  • Patent number: 7746025
    Abstract: A variable speed motor includes a main winding including first and second main windings, and an auxiliary winding including first and second auxiliary windings, wherein the main winding and the auxiliary winding are wound on a stator to form a plurality of poles, and a plurality of relays for performing a switching operation between serial/parallel connections of the first and second main windings or the first and second auxiliary windings. The variable speed motor includes a stator on which a 4-pole winding and a 12-pole winding arc wound, a plurality of tap windings connected in series to a 4-pole main winding forming 4 poles, for extending a variable range of rotation speed of the motor during a 4-pole operation mode, and a phase control circuit for varying rotation speed of the motor by controlling a phase of an input power-supply signal during a 12-pole operation mode.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: June 29, 2010
    Assignee: LG Electronics Inc.
    Inventors: Byung Keol Choi, Dong Soo Lee, Byoung Wook Min, Dong Won Kim
  • Publication number: 20100125371
    Abstract: A universal control panel for controlling operation of a cooling component. The universal control panel may have a variable frequency drive (VFD) that incorporates an input voltage and frequency sensing circuit; and logic, memory and communications circuits. The VFD accepts a plurality of differing input signals, analyzes the input signals and generates an output signal having a desired voltage and frequency to provide real time control over an electrical component operably associated with the cooling component. The VFD controls the cooling component in relation to changes in at least one of sensed pressure and a sensed temperature of a fluid, to dampen response of the electrical component, to thus achieve more efficient use of the cooling component being used to cool the fluid.
    Type: Application
    Filed: June 26, 2009
    Publication date: May 20, 2010
    Applicant: Liebert Corporation
    Inventors: John F. Judge, James W. Holdren, Wanlai Lin
  • Patent number: 7679308
    Abstract: Let the rotating axis whose direction coincides with the direction of the current vector that achieves maximum torque control be called the qm-axis, and the rotating axis perpendicular to the qm-axis be called the dm-axis. A motor control device switches its operation between low-speed sensorless control and high-speed sensorless control according to the rotation speed of the rotor. In low-speed sensorless control, the magnetic salient pole of the motor is exploited, and the d-q axes are estimated by, for example, injection of a high-frequency rotating voltage. In high-speed sensorless control, the dm-qm axes are estimated based on, for example, the induction voltage produced by the rotation of the rotor. During high-speed sensorless control, the ?(dm)-axis current is kept at zero irrespective of the ?(qm)-axis current.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: March 16, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Yoshio Tomigashi
  • Patent number: 7612519
    Abstract: Apparatus for driving a three-phase compressor assembly from a single-phase electrical power supply having first and second power lines, said three-phase compressor assembly comprising a compressor having a rotatable shaft, an electrical motor having a rotatable shaft coupled to the rotatable shaft of the compressor, the electrical motor having at least first, second and third motor windings and having at least first, second and third terminals connected to the first, second and third windings, means adapted to connect the first and second power lines of the single-phase power supply to the first and second terminals and a torque augmentation circuit for injecting current into the third terminal and including a capacitor and an electrical component in series with the capacitor, said electrical component having resistive characteristics and having means for essentially interrupting the current being injected into the third terminal.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: November 3, 2009
    Inventor: Otto J. M. Smith
  • Patent number: 7609534
    Abstract: A powering arrangement (32, 34) for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature component is estimated based upon a numerical derivative of the direct component. The direct component is also provided to a current regulator in a feed forward control manner, which minimizes error.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: October 27, 2009
    Assignee: Otis Elevator Company
    Inventors: Ismail Agirman, Vladimir Blasko, Christopher Czerwinski
  • Patent number: 7595604
    Abstract: Let the rotating axis whose direction coincides with the direction of the current vector that achieves maximum torque control be called the qm-axis, and the rotating axis perpendicular to the qm-axis be called the dm-axis. A motor control device switches its operation between low-speed sensorless control and high-speed sensorless control according to the rotation speed of the rotor. In low-speed sensorless control, the magnetic salient pole of the motor is exploited, and the d-q axes are estimated by, for example, injection of a high-frequency rotating voltage. In high-speed sensorless control, the dm-qm axes are estimated based on, for example, the induction voltage produced by the rotation of the rotor. During high-speed sensorless control, the ?(dm)-axis current is kept at zero irrespective of the ?(qm)-axis current.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: September 29, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventor: Yoshio Tomigashi
  • Publication number: 20090223235
    Abstract: A three-winding induction motor supplies shaft power to an air-conditioning or refrigeration compressor, where both motor and compressor are hermetically sealed, and the wall of the hermetic enclosure has an electrical bushing in the wall of the enclosure, which bushing has four electrical conductors to connect the motor stator windings internal in the enclosure to the external electrical circuits. Four conductors permit the six motor winding terminals for a three-winding induction motor to be connected in the unique semi-hexagon circuit to motor-run-capacitors and to a single-phase supply. A three-symmetrical-winding induction motor with the three windings in series and a single-phase supply connected across two of the windings in series. A circuit for use with a three-winding induction motor. A capacitor bank. An air-conditioning or refrigeration unit. A four-terminal hermetic bushing.
    Type: Application
    Filed: March 4, 2008
    Publication date: September 10, 2009
    Inventor: Otto J.M. Smith
  • Publication number: 20090066271
    Abstract: Methods and systems for converting direct current (DC) power to alternating current (AC) power are provided. A first phase of the AC power is generated based on a first carrier signal. A second phase of the AC power is generated based on a second carrier signal.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 12, 2009
    Inventors: Lateef A. Kajouke, Brian A. Welchko
  • Publication number: 20080197799
    Abstract: The motor control device includes a current detecting portion for detecting a phase current that flows in an armature winding of a stator of a three-phase motor based on current that flows between an inverter for driving the motor and a DC power supply. The motor control device performs a position sensorless vector control for the motor based on a control current that is obtained by a three-phase to two-phase conversion of the phase current based on an estimated rotor position of the motor. The motor control device farther includes a superposing portion for superposing a superposed voltage having a predetermined frequency on a drive voltage for driving the motor and an estimating portion for deriving the estimated rotor position based on the superposed current that is extracted from the control current and flows in the motor in accordance with the superposed voltage. A voltage vector locus of the superposed voltage from the superposing portion presents an ellipse.
    Type: Application
    Filed: February 15, 2008
    Publication date: August 21, 2008
    Applicant: Sanyo Electric Co., Ltd.
    Inventor: Yoshio TOMIGASHI
  • Publication number: 20080104983
    Abstract: A multiphase current supplying circuit according to the present invention includes a diode bridge, an intervening circuit, an inverter, a control circuit, and a lightning arrester. The diode bridge is connected to a single-phase AC power supply system via the lightning arrester, and performs full-wave rectification on a single-phase AC voltage. The intervening circuit includes a capacitor and an inductor, and is constituted by a choke input type low-pass filter. More specifically, one end of the inductor and one end of the capacitor are connected, output from the diode bridge is received between the other end of the inductor and the other end of the capacitor, and a rectified voltage generated at both ends of the capacitor is output to the inverter.
    Type: Application
    Filed: November 16, 2005
    Publication date: May 8, 2008
    Applicant: Daikin Industries, Ltd.
    Inventors: Hiroyuki Yamai, Morimitsu Sekimoto
  • Publication number: 20080061728
    Abstract: A current detecting unit detects three phase current of a three-phase inverter from current flowing between the inverter and a DC power supply. The current detecting unit includes a specified voltage vector generating portion that generates a specified voltage vector indicating a voltage vector that three-phase voltage of the inverter should follow, and a specified voltage vector correcting portion that corrects the generated specified voltage vector. The inverter is controlled in accordance with the specified voltage vector after the correction.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 13, 2008
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventor: Yoshio TOMIGASHI
  • Patent number: 7245105
    Abstract: A single-phase induction motor and a method for reducing noise in the same, which can eliminate unbalance between magnetomotive forces of main and auxiliary windings in a stator of the motor, thereby implementing a low noise, low vibration motor, and can also achieve balance between the magnetomotive forces of the stator windings in the entire running range of the motor, and can further achieve balance between the magnetomotive forces of the stator windings on the basis of temperature increase of the motor as it runs. The amplitude of a main-winding current flowing through the main winding in the stator is controlled to be equal to the amplitude of an auxiliary-winding current flowing through the auxiliary winding in the stator, and the phase difference between the main-winding and auxiliary-winding currents is controlled to be maintained at a predetermined value.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: July 17, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae Man Joo, Jun Hwa Lee, Seung Gee Hong
  • Patent number: 7196490
    Abstract: A variable speed motor includes first and second main windings wound on a stator, and a relay for performing a switching operation between serial/parallel connections of the first and second main windings to control motor speed. The variable speed motor further includes a tap winding connected in series to the main windings, or an additional capacitor, such that it can greatly extend the range of a variable speed without using a drive unit capable of changing the motor speed at an external location, resulting in reduced production costs of the motor, reduced electromagnetic vibration noise, and reduced power consumption.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: March 27, 2007
    Assignee: LG Electronics Inc.
    Inventors: Dong Won Kim, Byoung Wook Min, Byung Keol Choi, Tae Hee Lee
  • Patent number: 7190601
    Abstract: A space-vector pulse-width modulation method for a frequency converter provided with a voltage intermediate circuit, said frequency converter comprising a mains bridge (10) to be connected to an alternating current source (UU, UV, UW), a direct-voltage intermediate circuit and a controlled load bridge (11) for supplying a variable-frequency alternating voltage (US, UR, UT) to a load (12), and in which method the modulator performing the modulation is given a reference. The load bridge modulator is given a reference consisting of the references for the flux linkage changes produced by the voltage vectors, the flux linkage change is calculated on the basis of measured intermediate-circuit voltage, and the currently active voltage vector is kept turned on until the reference value is reached.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: March 13, 2007
    Assignee: Vacon Oyj
    Inventors: Julius Luukko, Hannu Saren
  • Patent number: 6690587
    Abstract: An apparatus and method to suppress a low speed ripple current to a motor include a power supply unit to supply single-phase alternating current (AC) power. A rectifying and smoothing unit rectifies and smoothes the single-phase AC power and outputs a direct current (DC) voltage indicative thereof. An inverter receives and converts the DC voltage to a motor driving current to drive the motor. A controller compares an envelope detected from a ripple current in the motor driving current and a DC component extracted from the ripple current and generates a compared result therefrom, and controls an output voltage from the inverter according to the compared result.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: February 10, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyeon Hur, Sang-Hoon Lee, Min-Hyun Park
  • Patent number: 6636013
    Abstract: In order to accelerate an asynchronous motor with a squirrel-cage rotor even under load extremely quickly, and in particular within the time of an electromagnetic rotor time constant, in order to be able to cause it to start with a so-called kick start, while the rotor is not moving, quasi-stationary magnetic conditions are initially produced, like at the start of a synchronous motor with a permanent-magnetic rotor. For that purpose there is briefly produced a high-frequency rotor induction current which occurs electrically and spatially in a quasi-stationary condition when thereupon still within the rotor time constant, a strong unmoving stator magnetic field is produced, with a stator current vector which is displaced through about 90° for an optimum starting torque in relation to the rotor current vector, whereupon the stator rotary field starts with increasing amplitude and frequency.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: October 21, 2003
    Assignee: Diehl AKO Stiftung & Co. KG
    Inventor: Stefan Zeh
  • Patent number: 6560130
    Abstract: In a control circuit for a power converting apparatus, such as a three-phase inverter, unnecessary switching operations of switching elements are avoided.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: May 6, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Norio Oba, Yuushin Yamamoto
  • Patent number: 6472844
    Abstract: A drive system including a rectifier, a high-frequency filter, a static inverter and an induction motor is driven without energy stores and fed by the single-phase mains, in which the use of an envelope generator with a mains-synchronous, preferably sinusoidal signal causes a preferably sinusoidal envelope to be sign-superimposed on the static inverter output signal, thus preventing inadmissible current overshoots in the single-phase mains. Possible fluctuations of the intermediate circuit voltage are thereby compensated. The advantageous operating frequency of the static inverter may be adjusted automatically by a PLL control circuit in that the phase shift between intermediate current and the envelope signal is evaluated. The advantageous operating frequency may be gained by adding a given frequency difference to the rotational speed of the motor. The envelope directly represents a projection of the variation of the voltage of the single-phase mains.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: October 29, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Peter Luerkens
  • Patent number: 6362592
    Abstract: A method is provided for driving a brushless motor of a type including windings pre-connected in a star or polygon configuration with an integrated driving system designed for independently driving the phase windings. The integrated driving system includes a plurality of output pins corresponding to the output nodes of as many half-bridge stages that are driven in pairs respectively by a direct or inverted driving signal at the same power level without overloading the output metal lines of the integrated device. Each supply terminal of the brushless motor is connected to one of the plurality of output pins of the integrated system relative to a first driving phase signal and to another output pin relative to a different driving phase signal. The drive circuit is internally configured through a plurality of integrated signal path selectors set in one or the other position depending upon the intended use of the integrated device.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: March 26, 2002
    Assignee: STMicroelectronics S.R.L.
    Inventor: Francesco Chrappan Soldavini
  • Patent number: 6359405
    Abstract: In a propulsion system for hybrid vehicles, etc., a failure detection system that detects the occurrence of failure that obstructs a phase current supplied to an electric motor for propulsion. The direct current of the battery is converted to three-phase alternating current by an inverter and supplied to the electric motor. The controller drive controls the inverter so that the output torque of the electric motor attains a target torque. Each of the phase currents supplied to the electric motor are detected by a current sensor, and provided to a comparator. The comparator compares the value of each of the detected phase currents and the current limit value calculated by the current limit value calculation circuit, and outputs a signal showing that a current phase has abnormally risen. This signal is counted by the counter, and the occurrence of failure is identified based on this count value.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: March 19, 2002
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Takafumi Tsurumi
  • Patent number: 6356041
    Abstract: A motor system utilizes a master three-phase induction motor driven by a single-phase power supply which the motor has six-windings connected in a symmetrical double DELTA or double WYE configuration with appropriate running capacitors to provide when the motor is running a balanced three-phases of voltage potentials. The potentials have been tapped off to run satellite three-phase induction motors.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: March 12, 2002
    Inventor: Otto J. M. Smith