Power Supply Voltage Feature (e.g., Power Supply Voltage, Vcc Compensation, Rectifier Circuit, Power Regulator, Auxiliary Or Secondary Power Supply, Etc.) Patents (Class 318/400.3)
  • Patent number: 11177677
    Abstract: The system is directed to enhancing the energy efficiency of electrical charging systems. The system is utilized in circuits that include a power source such as a battery feeding electrical current into an energy storage device such as a capacitor to charge the capacitor with electrical power. The system of the invention extracts energy from such circuits that would otherwise be converted into heat and thereby wasted. The system includes an energy storage and release device such as a motor that is connected to the circuit and converts the electrical energy therein that would otherwise be converted into heat into mechanical energy or electrical energy by means of monitoring and controlling electrical current flow through the system to maintain it at low and constant levels.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: November 16, 2021
    Inventor: Jack Nachamkin
  • Patent number: 11128252
    Abstract: A motor drive device has an abnormality detection function for a power supply unit between its own device and a power supply, and includes: a forward converter that is inputted AC power from the power supply via the power supply input part, and converts the AC power into DC power; a reverse converter that converts the DC power from the forward converter into AC power; a DC link capacitor provided to a DC link between the forward converter and the reverse converter; a voltage detection part that detects voltage of the DC link capacitor; and an abnormality detection part that obtains a voltage change amount for a predetermined time of the DC link capacitor based on voltage values detected by the voltage detection part, and performs abnormality detection on the power supply input part based on the voltage change amount thus obtained.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: September 21, 2021
    Assignee: FANUC CORPORATION
    Inventor: Tomokazu Yoshida
  • Patent number: 11125830
    Abstract: A motor driving device capable of reliably detecting a malfunction in the performance of a heatsink. The motor driving device includes a heat generating element, a heatsink, an electric power detecting part for detecting a consumed power of the heat generating element, a temperature detecting part for detecting a temperature of the motor driving device, a temperature change calculating part for calculating, as a detected valuation, an amount of change in the temperature within a predetermined time, a reference determination part for determining a reference amount of change in the temperature based on the temperature and the consumed power, and a temperature change judging part for comparing the reference amount of change with the detected amount of change, and judges whether the detected change is different from the reference change.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: September 21, 2021
    Assignee: FANUC CORPORATION
    Inventors: Genzo Naito, Kazuhiro Yamamoto
  • Patent number: 11119457
    Abstract: A method for controlling an electric drive system and the electric drive system. The method includes: measuring an external variable; estimating a control variable for a current sampling step with a mathematical model; predicting a control variable for a future sampling step for each of a plurality of candidate voltage vectors selected for the future sampling step; and calculating a cost function, and identifying a primary voltage vector giving a minimum, where the cost function is defined as a deviation between the predicted stator flux and the reference stator flux. The method further includes: predefining a lookup table giving a correlation between a nonzero voltage vector and a voltage vector group including four candidate voltage vectors, where the plurality of candidate voltage vectors is selected referring the lookup table. The electric drive system includes motor, power converter, and controller, and configured to perform the method.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: September 14, 2021
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Mohamed Mamdouh El Shormbably, Mohamed Ali Abido
  • Patent number: 10862386
    Abstract: The present invention discloses a novel electric motor, which comprises a stator and a rotor. The stator is a permanent magnet. The rotor comprises a rotor coil and a capacitor. The rotor coil and the capacitor are connected in series to form a resonant driving circuit. The resonant driving circuit is used to convert a natural electromagnetic field into a current to drive the rotor to rotate. The motor of the present invention can rotate without any external power, thereby solving the technical problem that the use of the external power makes a restriction to the further development and application of the motor, and solving the problem of motor energy consumption.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: December 8, 2020
    Inventor: Shiqiao Liu
  • Patent number: 10781088
    Abstract: Disclosed herein is a controller of a hoist. The controller of the hoist includes a lift up button which is adjustable in a pressed degree; a lift down button which is adjustable in a pressed degree; a lift up switch disposed below the lift up button so as to be immediately operated when the lift up button is pressed; a lift down switch disposed below the lift down button so as to be immediately operated when the lift down button is pressed; a magnet body connected to both of the lift up button and the lift down button and disposed to descend during a pressing operation of the lift up button or the lift down button; and a Hall sensor disposed to correspond to the magnet body so as to detect a descending degree of the magnet body being pressed by the lift up button or the lift down button.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: September 22, 2020
    Assignee: DAESAN INOTEC INC.
    Inventors: Young Ku Sunwoo, Si Kyung Kim
  • Patent number: 10778129
    Abstract: In a motor control device, a voltage phase detecting unit sets a voltage phase of applied voltage to be applied to a motor based on a deviation between a target d-axis current set by a target d-axis current setting unit and an actual d-axis current detected by a rotor position detecting unit and an actual rotational speed detected by a rotational speed detecting unit. Here, a correction amount calculating unit determines whether or not a rotor has rotated by one period of mechanical angle based on the rotor position detected by the rotor position detecting unit and calculates an average value of deviations between target d-axis current and actual d-axis current in each period of mechanical angle as a correction amount, and a second addition/subtraction unit corrects a target d-axis current by a correction amount.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: September 15, 2020
    Assignee: SANDEN AUTOMOTIVE COMPONENTS CORPORATION
    Inventors: Masafumi Hotta, Daisuke Hirono
  • Patent number: 10742154
    Abstract: This motor driving device is provided with a direct-current power supply, an inverter, and a noise filter. The noise filter is provided with: a choke coil, wherein a first winding and a second winding are wound on a common core, and the first winding is inserted into a positive electrode bus; and two capacitors connected in series between the positive electrode bus and a negative electrode bus. One end of the second winding is connected to a neutral point of a three-phase motor, and another end of the second winding is connected to a wire between the two capacitors.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: August 11, 2020
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventor: Masamichi Nawa
  • Patent number: 10625758
    Abstract: A voltage estimating device for a power supply line according to one aspect of the present disclosure includes a voltage detector, a current detector, a voltage calculator. The voltage calculator calculates a magnitude of alternating primary voltage that a primary winding in a transformer receives from a power supply line based on a magnitude of tertiary voltage in the transformer detected by the voltage detector, a magnitude of output current in the transformer detected by the current detector, and correlation information. The correlation information indicates a correlation between a voltage ratio and the magnitude of the output current, and the voltage ratio represents a ratio of the magnitude of the primary voltage to the magnitude of the tertiary voltage.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: April 21, 2020
    Assignee: CENTRAL JAPAN RAILWAY COMPANY
    Inventors: Kenji Sato, Takafumi Fukushima, Norihiro Suyama
  • Patent number: 10615733
    Abstract: A power tool is provided including a brushless motor. A power supply interface is arranged to receive at least one of AC power from an AC power supply having a first nominal voltage or DC power from a DC power supply having a second nominal voltage, where the first and second nominal voltages both fall approximately within the operating voltage range of the motor. A motor control circuit is provided including a rectifier circuit converting the AC power to a rectified voltage signal, a power switch circuit having power switches to supply electric power from at least one of the DC power or the rectified voltage signal to the motor, and a controller controlling a switching operation of the power switches to regulate the supply of electric power to the motor at a level corresponding to the operating voltage range of the motor.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: April 7, 2020
    Assignee: Black & Decker Inc.
    Inventors: John D. Cox, Michael K. Forster, John C. Vanko, Daniel J. White, Bhanuprasad V. Gorti, Matthew J. Velderman, Andrew E. Seman, Jr.
  • Patent number: 10605187
    Abstract: An LPV/MPC engine control system is disclosed that includes an engine control unit connected to multiple sensors. The engine control unit receives, from the sensors, signals indicative of desired engine torque and engine torque output, and determines, from these signals, optimal engine control commands using a piecewise LPV/MPC routine. This routine includes: determining a nonlinear and a linear system model for the engine assembly, minimizing a control cost function in a receding horizon for the linear system model, determining system responses for the nonlinear and linear system models, determining if a norm of an error function between the system responses is smaller than a calibrated threshold, and if the norm is smaller than the predetermined threshold, applying the linearized system model in a next sampling time for a next receding horizon to determine the optimal control command. Once determined, the optimal control command is output to the engine assembly.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: March 31, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Yue-Yun Wang, Ruixing Long, Julian R. Verdejo, Jyh-shin Chen
  • Patent number: 10536096
    Abstract: The invention relates to a method for controlling phase currents (iU_WR1, iv_WR1, iw_WR1) of a three-phase inverter (WR1), the phase currents (iU_WR1, iv_WR1, iw_WR1) of the inverter (WR1) being controlled by way of a direct hysteresis current control and a selected phase of the inverter (WR1) being additionally switched depending on a zero system current (i0_WR1) of the inverter (WR1).
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: January 14, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Norbert Benesch, Harald Wiessmann
  • Patent number: 10532666
    Abstract: A power generation system and a power generation method for a fuel cell vehicle, the power generation system comprising a main line that sequentially and electrically connects a fuel cell, a high voltage DC-DC converter, and a high voltage battery; an external power consumption device connecting unit; and a controller that controls the fuel cell or the high voltage DC-DC converter by selecting a mode for supplying power to an external power consumption device by using only power generated by the fuel cell, a mode for supplying power to the external power consumption device by using only the high voltage battery, or a mode for operating the fuel cell or the high voltage DC-DC converter in a high efficiency output interval, according to power consumption of the external power consumption device.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: January 14, 2020
    Assignees: HYUNDAI MOTOR CORPORATION, KIA MOTORS CORPORATION
    Inventors: Sung Gone Yoon, Jae Yeong Yoo
  • Patent number: 10507731
    Abstract: Provided is an electric power system capable of rapidly slowing an electric motor and quickly discharging a capacitor when an abnormality occurs. If an abnormality detection device detects an abnormality, a control device of an electric power system performs a switching control that alternately switches between an upper arm three-phase short-circuit control that sets all upper arms to a conductive state and sets all lower arms to a non-conductive state, and a lower arm three-phase short-circuit control that sets all upper arms to a non-conductive state and sets all lower arms to a conductive state. When switching between the two short-circuit controls, a conduction overlap period in which the conductive state of said upper arms and the conductive state of said lower arms overlap may be generated.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: December 17, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yoshinari Tsukada, Hiromichi Imai, Shingo Soma, Hisaya Oiwa
  • Patent number: 10396072
    Abstract: A semiconductor device is provided having a first region and a second region surrounding the first region includes a first electrode, a second electrode, a first semiconductor layer of a first conductivity type between the first electrode and the second electrode, a second semiconductor layer of the first conductivity type located over the first semiconductor layer, a third semiconductor layer of the second conductivity type on the second semiconductor layer in the first region, a fourth semiconductor layer of the first conductivity type between the third semiconductor layer and the second semiconductor layer, a fifth semiconductor layer of the second conductivity type on the second semiconductor layer in the second region, and a sixth semiconductor layer of the first conductivity type located between the fifth semiconductor layer and the second semiconductor layer, wherein the width of the fourth semiconductor layer is less than the width of the sixth semiconductor layer.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: August 27, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONICS DEVICES & STORAGE CORPORATION
    Inventor: Yoichi Hori
  • Patent number: 10381953
    Abstract: A bidirectional bridgeless buck-boost power converter circuit is provided that can function as both a voltage source inverter (VSI) circuit to transform direct current (DC) voltage to alternating current (AC) voltage and as a power factor corrector (PFC) circuit to transform AC voltage to DC voltage. The disclosed converter fully utilizes inductors to form a CL filter and buck-boost converter energy storage element. Thus, low inductance chokes are used in the converter, which leads to a higher power density and is more cost-effective. Further, the bridgeless configuration minimizes conduction losses of semiconductors, and coupled with the use of low inductance chokes this improves system efficiency.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: August 13, 2019
    Assignee: The University of Manitoba
    Inventors: Ngai Man Ho, King Man Siu
  • Patent number: 10374517
    Abstract: An apparatus for controlling a power converter includes a first converter configured to convert an AC voltage into a DC voltage by operations of an input side switch, a DC link capacitor charged with the DC voltage from the first converter, and a second converter configured to step down the DC voltage across the DC link capacitor by operations of one or more output side switches. In the apparatus, a lower limit calculator calculates a lower limit of the DC voltage across the DC link capacitor based on an output voltage of the second converter, a turns ratio of a transformer of the second converter, and a ratio of a turn-on period to one switching period for the one or more output side switches. A switch controller operates the input side switch to control the voltage across the DC link capacitor to a command voltage higher than the lower limit.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: August 6, 2019
    Assignees: SOKEN, INC., DENSO CORPORATION
    Inventors: Kenji Tomita, Seiji Iyasu, Yuichi Handa
  • Patent number: 10291173
    Abstract: A power tool is provided including a brushless motor having a rotor and a stator. A power supply interface is arranged to selectively receive a first power input from a first power supply having a first nominal voltage and a second power input from a second power supply having a second nominal voltage, where at least the first nominal voltage does not fall within approximately the operating voltage range of the motor. A motor control circuit is provided including a power switch circuit having power switches that supply electric power from at least one of the first power input or the second power input to the motor, and a controller that controls a switching operation of the power switches to optimize the supply of electric power from the first power input at a level corresponding to the operating voltage range of the motor.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: May 14, 2019
    Assignee: Black & Decker Inc.
    Inventors: John D. Cox, Michael K. Forster, John C. Vanko, Daniel J. White, Bhanuprasad V. Gorti, Matthew J. Velderman, Andrew E. Seman, Jr.
  • Patent number: 10286786
    Abstract: The present invention relates to a charging circuit for an electrical energy accumulator and a method for operating a charging circuit. Common components are used for charging and discharging the electrical energy accumulator. According to the invention, a charging circuit comprises step-up and step-down functionalities and combines them with rectifier and/or inverter functionalities. In this way, a circuit arrangement is created which allows a flexible circuit design with a small number of components.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: May 14, 2019
    Assignee: Robert Bosch GmbH
    Inventor: Hans Geyer
  • Patent number: 10236816
    Abstract: A motor inverter includes an inverter circuit having a plurality of switching elements, a capacitor, a precharge closing an opening and closing part, a controller closing the opening and closing part in response to the “ON” operation of the operational switch, wherein when charge is accumulated in the capacitor until voltage of the capacitor reaches a predetermined voltage value capable of determining whether or not short circuiting occurs, the controller controls a switching operation of the switching elements, and a determiner determining whether or not short circuiting occurs based on at least one of current flowing in the inverter circuit and voltage of the capacitor when the controller controls the switching operation of the switching elements in a state that the electric charge is accumulated in the capacitor and the opening and closing part is opened.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: March 19, 2019
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventor: Yuko Ishita
  • Patent number: 10224722
    Abstract: A device for switching a semiconductor-based switch includes a terminal that is configured to be connected to a control terminal of the semiconductor-based switch. A controllable activation voltage source is configured to provide a time-varying activation voltage potential. A controllable resistive circuit includes at least two ohmic resistances connected in parallel that are controllable such that at least three resistance values of the parallel connection result. A control device is configured to control the controllable activation voltage source and the controllable resistive circuit independently of one another. The controllable activation voltage source and the controllable resistive circuit are connected to a series connection connected to the terminal.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: March 5, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventor: René Hopperdietzel
  • Patent number: 10211193
    Abstract: A hybrid-type power module having dual-sided cooling is provided. The power module includes semiconductor chips that is disposed on each of an upper board and a lower board at a location between the boards. The semiconductor chips of the upper board and the lower board have different electric capacities.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: February 19, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Hyun Koo Lee, Woo Yong Jeon, Sang Cheol Shin
  • Patent number: 10205406
    Abstract: A passive boost network configured to boost and output an AC power signal having a predetermined frequency, can include: an input port; an output port configured to provide the AC power signal; first and second passive components coupled in series between first and second terminals of the input port; a third passive component coupled in series with the second passive component between first and second terminals of the output port; and where the first passive component is one of a capacitor and an inductor, and the second and third passive components are each the other of the capacitor and the inductor.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: February 12, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Wang Zhang, Chen Zhao
  • Patent number: 10195960
    Abstract: When two motors are in a locked state in which electric current is flowed in a concentrated manner in a specific phase in the two motors, a lock protection control is performed to rotate the two motors to change over a phase in which electric current is flowed in a concentrated manner in the two motors. The lock protection control rotates the two motors such that a vehicle is turned.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: February 5, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Akihiko Ide
  • Patent number: 10158305
    Abstract: An inverter controller according to an embodiment has an inverter main circuit, current detectors, a current command value calculator, a voltage command value calculator and an estimator. The inverter main circuit is capable of being electrically connected to a rotary drive target. The current detectors detect current values output from the inverter main circuit. The current command value calculator calculates current command values with which an output voltage output from the inverter main circuit becomes equal to or more than a target value. The voltage command value calculator calculates voltage command values with which the current values become equal to the current command values. The estimator calculates an estimated rotational phase angle of the rotary drive target, based on the voltage command values and the current values.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: December 18, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shun Taniguchi, Kazuaki Yuuki, Kentaro Suzuki, Tomoaki Shigeta
  • Patent number: 9969253
    Abstract: A hybrid energy system is provided in a vehicle including an autonomous power supply and being connectable to an external power supply infrastructure along the route of the vehicle, and which vehicle is arranged to operate in an autonomous power supply mode and/or in an external power supply mode. The system includes a first high voltage circuit including a first traction motor connected to an energy storage system by a first power converter for propelling the vehicle; a second high voltage circuit including a second traction motor connectable to an external power supply by a second power converter for propelling the vehicle; and where the first high voltage circuit and the second high voltage circuit are connectable by a third power converter between the first and the second power converters. A method for operating the hybrid energy system is also provided.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: May 15, 2018
    Assignee: Volvo Truck Corporation
    Inventors: Martin West, Richard Sebestyen, John Simonsson, Jonas Storm
  • Patent number: 9960703
    Abstract: To provide a DC power-supply device that can suppress voltage unbalance of a plurality of capacitors serially connected between both terminals of a load, achieve stable drive of the load and long life of the capacitors, and contribute to high reliability, in a configuration in which an alternating current is converted into a direct current and is supplied to a load, and a refrigeration-cycle application device including the DC power-supply device. The DC power-supply device includes a rectifier circuit, a reactor connected to an input or an output side of the rectifier circuit, a first capacitor and a second capacitor serially connected between output terminals to a load, a charging unit that selectively charges one or both of the first capacitor and the second capacitor, and further includes a control unit that controls the charging unit so that voltage unbalance between the first capacitor and the second capacitor is suppressed.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: May 1, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazunori Hatakeyama, Shota Kamiya, Yosuke Shinomoto
  • Patent number: 9899936
    Abstract: In one embodiment, an offset voltage generator includes a first limiter configured to compare a first phase-voltage signal with a maximum limit value and a minimum limit value to output a first limit-voltage signal; a second limiter configured to compare a second phase-voltage signal with the maximum limit value and the minimum limit value to output a second limit-voltage signal; a third limiter configured to compare a third phase-voltage signal with the maximum limit value and the minimum limit value to output a third limit-voltage signal; and a summer configured to add a difference between the first phase-voltage signal and the first limit-voltage signal, a difference between the second phase-voltage signal and the second limit-voltage signal, and a difference between the third phase-voltage signal and the third limit-voltage signal, to output an offset voltage.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: February 20, 2018
    Assignee: LSIS CO., LTD.
    Inventor: Hak-Jun Lee
  • Patent number: 9899328
    Abstract: A power semiconductor module includes: a positive arm and a negative arm that are formed by series connection of self-arc-extinguishing type semiconductor elements, the positive arm and the negative arm being connected at a series connection point between the self-arc-extinguishing type semiconductor elements; a positive-side electrode, a negative-side electrode, and an AC electrode connected to the positive arm and the negative arm; and a substrate on which a plurality of wiring patterns are formed, the wiring patterns connecting the self-arc-extinguishing type semiconductor elements of the positive arm and the negative arm to the positive-side electrode, the negative-side electrode, and the AC electrode. Respective directions of current flowing in adjacent wiring patterns are identical to each other, and one of the adjacent wiring patterns is arranged in mirror symmetry with the other of the adjacent wiring patterns.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: February 20, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshiko Tamada, Junichi Nakashima, Yasushi Nakayama, Yukimasa Hayashida
  • Patent number: 9876456
    Abstract: A bridge converter for a multi-phase electrical machine has a number of bridge cells connected in series. Each bridge cell has a controller. The bridge converter includes a sensor operative to provide a commutation signal to at least one controller. A multi-phase electrical machine has a plurality of stator windings and a bridge converter having a number of bridge cells connected in series. Each bridge cell has a controller. The bridge converter includes a sensor operative to provide a commutation signal to at least one controller.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: January 23, 2018
    Assignee: ABB Schweiz AG
    Inventors: Zhiguo Pan, Mario Schweizer, Ghanshyam Shrestha
  • Patent number: 9859832
    Abstract: A multiphase electric motor control device includes: a bridge circuit including phase circuits each including a high potential side switching element, a low potential side switching element, and a current detector, a PWM control unit that outputs PWM signals to the switching elements; a control unit that acquires phase current values at a timing synchronized with a triangle wave; and a current value estimation unit that estimates a phase current value of one phase based on phase current values of other phases. In a case where an ON time of the PWM signal output to the low potential side switching element of the one phase from the PWM control unit is shorter than a predetermined time, the control unit acquires the phase current values which are detected by shifting the timing by using the current detectors of at least the other phases.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: January 2, 2018
    Assignee: OMRON AUTOMOTIVE ELECTRONICS CO., LTD.
    Inventor: Yoji Mori
  • Patent number: 9837949
    Abstract: A motor driving device includes: a rectifier that rectifies an AC current and outputs a DC current to a DC link; an inverter unit that converts the DC current to an AC current for a motor; an initial charging unit that initially charges a smoothing capacitor with the DC current that flows through a charging resistor; a storage unit that stores a load capability of the charging resistor; a power calculation unit that calculates an amount of power generated in the charging resistor in response to the DC current flowing therethrough; and an opening/closing unit that shuts off the DC current from flowing in the smoothing capacitor when the amount of power reaches the load capability during an initial charging period and allows the DC current to flow in the smoothing capacitor after the shutoff when the amount of power is smaller than or equal to a threshold value.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: December 5, 2017
    Assignee: FANUC CORPORATION
    Inventors: Yuuki Kumamoto, Yasuyuki Matsumoto
  • Patent number: 9709617
    Abstract: A load drive apparatus includes a switching element, a current detection circuit, a short circuit detection resistor, and a reflux diode. The switching element is placed to a high side of the inductive load, is interposed between the voltage source and the inductive load, and controls a current supplied to the inductive load. The current detection circuit is placed to a low side of the inductive load, and detects a current value of a current flowing through the low side of the inductive load. The short circuit detection resistor is interposed between the current detection circuit and a ground. The reflux diode is placed in a forward direction of the reflux diode and connects a middle point between the short circuit detection resistor and the current detection circuit with a different middle point between the switching element and the inductive load.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: July 18, 2017
    Assignee: DENSO CORPORATION
    Inventor: Masafumi Umeno
  • Patent number: 9692289
    Abstract: A DC power-supply device that suppresses an increase of a harmonic current and deterioration of a power factor without causing any imbalance among respective phase currents, in a configuration in which a three-phase alternating current is converted into a direct current and supplied to a load. The DC power-supply device includes a rectifier circuit, a reactor connected to an input side or an output side of the rectifier circuit, a first capacitor and a second capacitor serially connected between output terminals to a load, and a charging unit. During a cycle combining a charging period and a non-charging period of a pair of the first capacitor and the second capacitor, the charging unit is controlled so that a charging frequency becomes 3n times (n is a natural number) the frequency of the three-phase alternating current.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: June 27, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shota Kamiya, Kazunori Hatakeyama, Norikazu Ito, Kenta Yuasa, Shoji Isoda
  • Patent number: 9653916
    Abstract: A power supply system includes an input stage converting circuit, a first energy storage component, and an output stage converting circuit. The first energy storage component is electrically coupled to the input stage converting circuit, and the output stage converting circuit is electrically coupled to the first energy storage component. The input stage converting circuit is configured to charge the first energy storage component, and the first energy storage component stores charging electricity. The output stage converting circuit is configured to convert the charging electricity into output electricity and provide the output electricity to a load. The input stage converting circuit has a first electric power, and the output stage converting circuit has a second electric power greater than the first electric power. A method for converting power of the power converter is also disclosed herein.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: May 16, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Xing-Kuan Guo, Li-Tao Xia
  • Patent number: 9537433
    Abstract: There is provided a motor drive device including, a current detection section that detects current flowing between a power source and an inverter circuit generating voltage to be supplied to a motor, a voltage control section that outputs a first control signal to cause the inverter circuit to generate a voltage for rotating the motor at a rotation speed based on an instructed value, and a rotation speed suppression section that, in cases in which current, detected by the current detection section at a timing at which a voltage generated by the inverter circuit rises from low level to high level, is a predetermined threshold value or higher, outputs a second control signal to the voltage control section to cause the inverter circuit to generate a voltage for rotating the motor at a lower rotation speed than the rotation speed based on the instructed value.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: January 3, 2017
    Assignee: ASMO CO., LTD.
    Inventors: Kosuke Yamaguchi, Daijiro Saigusa
  • Patent number: 9446668
    Abstract: A method for driving a vehicle comprising at least two motors is provided. If a plurality of motors are fed from an intermediate circuit via inverters, the current in the intermediate circuit has a plurality of harmonics (?5th, ?3th, ?1st, +1st, +3rd, +5th). To prevent coupling capacitors of the intermediate circuit becoming over-burdened, the switching frequency of the inverters is shifted in such a manner that the harmonics no longer fall into a resonance range.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: September 20, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Georg Bachmaier, Christian Bachmann, Dominik Bergmann, Marco Cyriacks, Matthias Gerlich, Guillaume Pais, Alexandru Popescu
  • Patent number: 9385643
    Abstract: An object is to perform discharge of a capacitor using a motor without rotating the motor even when connected to a position sensorless motor. The motor drive apparatus calculates a voltage pulse width at which a motor does not rotate or vibrate using a both-end voltage of a smoothing capacitor and an inductance estimation value of the motor, and applies a voltage with the voltage pulse width to the motor to calculate an inductance. Then, a rotor position is estimated using the inductances calculated for individual switching patterns. A motor current is caused to flow on the basis of the estimated rotor position to perform discharge of charge accumulated in the smoothing capacitor.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: July 5, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Hideo Nakamura, Naoki Nishikawa, Masahiko Asai, Hiroyuki Kamitani
  • Patent number: 9291380
    Abstract: The present invention relates to a thermodynamic cycle process system comprising at least two heat exchangers, an EC compressor, and a combination of electronic components such as EC fans, electronic regulator valves and/or EC pumps. A central supply electronics unit can be connected to an AC voltage source, wherein the electronic components have an integrated power electronics device which produces the PWM operating voltage required for the electronic components. The central supply electronics unit is connected to the individual integrated power electronics devices for the electronic components, and produces the supply voltages required for the respective power electronics devices.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: March 22, 2016
    Assignee: ebm-papst Mulfingen GmbH & Co. KG
    Inventor: Thomas Sauer
  • Patent number: 9203339
    Abstract: A motor driving device according to the present invention includes: a PWM duty ratio detecting unit for detecting a target rotational speed based on a duty ratio of a PWM signal input from a host system; a PWM period detecting unit for detecting a period of the PWM signal; a PWM period error calculating unit for calculating an error between a PWM period output from the PWM period detecting unit and a PWM period previously set as a reference calculated by using the operational clock generator; a position detecting sensor for detecting a permanent magnet of the rotor; and an actual rotational speed calculating unit for calculating an actual rotational speed of the rotor by using a signal output from the position detecting sensor. The present motor driving device controls a speed while correcting the actual rotational speed based on the PWM period error.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: December 1, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Daisuke Sato
  • Patent number: 9166511
    Abstract: A converter controls a system voltage, which is a DC link voltage of an inverter, in accordance with a voltage command value. The inverter outputs a rectangular wave voltage having the system voltage as amplitude to an AC motor during application of rectangular wave voltage control. During application of rectangular wave voltage control, a voltage command value for the system voltage is modified such that a current phase on a d-q plane of the AC motor is brought closer to a target current phase line. The target current phase line is set on an advance side relative to an optimal current phase line which is a set of current phases at which output torque is maximized for the same amplitude of a motor current in the AC motor.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: October 20, 2015
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Akiyoshi Morii, Tetsuya Nomura, Makoto Nakamura, Mikio Yamazaki
  • Patent number: 9118266
    Abstract: The present invention relates to a motor assembly, a method of operation thereof and a transport vehicle provided with the motor assembly. The motor assembly is provided with an energy source switching controller that is in synchronization with motor operation and provides an improved utilization of energy storage sources in an electric, hybrid electric, or fuel cell based motor vehicle drive train application.
    Type: Grant
    Filed: May 7, 2013
    Date of Patent: August 25, 2015
    Assignee: Atieva, Inc.
    Inventor: Chia-Ming Chuang
  • Publication number: 20150145446
    Abstract: A motor drive device includes a constant voltage power supply and a motor drive control unit. The constant voltage power supply includes an AC/DC converter, a zero-cross detector, a switching control unit and a switching regulator. The AC/DC converter converts an AC voltage supplied from an AC voltage source into a DC voltage. The zero-cross detector detects a zero-cross point of the AC voltage, and outputs a zero-cross detection signal. The switching control unit outputs a switching control signal based on the zero-cross detection signal. The switching regulator has a switching element. The motor drive control unit outputs a motor drive signal for driving a motor to the inverter. The AC/DC converter has a rectifier circuit and a smoothing capacitor. The switching regulator performs switching on a first DC voltage in accordance with the switching control signal at a timing corresponding to the zero-cross point.
    Type: Application
    Filed: November 11, 2014
    Publication date: May 28, 2015
    Inventor: Hiroyuki SHITABO
  • Patent number: 9041329
    Abstract: A vehicle having a traction battery and at least one electric machine for propelling the vehicle is provided. A high voltage DC bus electrically connects the traction battery to the electric machine. A controller monitors and commands power flow through the DC bus, the electric machine, and the battery. In response to a key-off event, the controller immediately discharges the DC bus by providing a current to the electric machines. This discharge continues until the voltage on the DC bus reaches a threshold. As the speed of the electric machine decreases towards a speed threshold, the voltage in the DC bus is maintained. Once the electric machine speed reduces past the threshold, the DC bus discharges the remaining voltage in the DC bus at a rate slower than the first immediate discharge.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: May 26, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Yuan Zhang, Michael W. Degner
  • Patent number: 9030140
    Abstract: An in-vehicle power supply system includes a DC power source, a steering power converter, a steering drive control unit, a plurality of voltage-reducing devices, and a voltage-reducing control unit. The steering power converter converts electric power supplied from the DC power source, and provides the electric power converted to a steering assist motor. The steering drive control unit is supplied with electric power from the DC power source, and controls the steering power converter. The voltage-reducing devices are coupled in parallel to each other between the DC power source and the steering power converter. Each of the voltage-reducing devices reduces a power source voltage of the DC power source and generates a reduced voltage when being operated. The voltage-reducing control unit determines operation state or non-operation state of each of the voltage-reducing devices such that at least one of the voltage-reducing devices is in operation at a time.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 12, 2015
    Assignee: Denso Corporation
    Inventors: Takahiro Yamanaka, Toshihisa Yamamoto
  • Patent number: 9024559
    Abstract: A converter module for a variable speed drive having a semiconductor device for precharge is described. The precharge circuit includes switching modules, one switching module with a first semiconductor switch connected in parallel or series with a second semiconductor switch. The second semiconductor switch is switched on and off during the precharge operation in order to limit the inrush current into the DC Link. After the precharge operation, the second semiconductor switch is turned on all the time and acts like a diode. The second semiconductor device may have a lower maximum current rating than the main semi-conductor devices. The lower current rated semiconductor device experience the same short circuit current as the higher current rated semiconductor device. The lower current rated semiconductor device can be supplied with a larger gate to emitter voltage than the higher current rated semiconductor device to equalize current between semiconductor devices.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: May 5, 2015
    Assignee: Johnson Controls Technology Company
    Inventors: Shreesha Adiga-Manoor, Michael S. Todd, Ivan Jadric
  • Patent number: 9024547
    Abstract: Apparatus and methods for reducing unwanted conducted noise generated by a DC load 17. Load 17 is powered by a voltage source 11. A current sense 13 senses pulse current Ifan flowing through the load 17. First converting means 14, 15, 16 converts the sensed pulse current Ifan to a correction voltage Vp. The correction voltage Vp is then converted to a correction current Ip, which offsets the deleterious effects of Ifan. The current Is flowing through the voltage source 11 equals Ifan plus the correction current Ip.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: May 5, 2015
    Assignee: Allied Telesis, Inc.
    Inventor: Randall Vogt
  • Patent number: 9024560
    Abstract: A method is disclosed for adjusting a voltage of a DC-voltage intermediate circuit in a battery system having a battery and a drive system. The battery is configured to output one selectable output voltage from n+1 different output voltages. In a first step of the method, an actual value of the voltage of the DC-voltage intermediate circuit is determined, and is then compared with the various output voltages of the battery. A first selected output voltage of the battery, which is the highest voltage of those output voltages of the battery which are less than the actual value of the voltage of the DC-voltage intermediate circuit, and a second selected output voltage of the battery, which is the lowest voltage of those output voltages of the battery which are higher than the actual value of the voltage of the DC-voltage intermediate circuit, are then selected.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: May 5, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Holger Fink
  • Patent number: 9018881
    Abstract: Systems and methods are provided for diagnosing stator windings in an electric motor. An exemplary method for diagnosing stator windings in an electric motor involves determining an input energy imbalance across phases of the stator windings for an electrical period of the electric motor and identifying a fault condition when the input energy imbalance is greater than a first threshold value. In some embodiments, an input energy ratio across phases of the stator windings is also determined for the electrical period, wherein the fault condition is identified as a phase-to-phase short circuit fault condition when the input energy ratio is greater than a second threshold value and the input energy imbalance is greater than the first threshold value, or alternatively, as an in-phase short circuit fault condition when the input energy ratio is less than the second threshold value.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: April 28, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Xiaofeng Mao, Lei Hao
  • Publication number: 20150108929
    Abstract: A power controller includes a boost converter, an inverter, and a control unit controlling the output voltage of the boost converter and the carrier frequency of the inverter. The control unit includes a carrier frequency reducing program which reduces the carrier frequency to an LC resonance upper limit frequency while maintaining a set value of the output voltage of the boost converter at a system loss minimization voltage at the time of reduction of the carrier frequency from the set frequency, and a voltage varying program which changes the carrier frequency to a first varied frequency calculated based on a first predetermined temperature or lower and the temperatures of the respective switching elements, and changes the set value of the output voltage of the boost converter to a voltage at which the LC resonance upper limit frequency becomes the first varied frequency.
    Type: Application
    Filed: July 23, 2014
    Publication date: April 23, 2015
    Inventors: Daigo Nobe, Ryoji Sato, Kazuhito Hayashi