By Pulse Modulation Technique (e.g., Pwm, Ppm, Etc.) Patents (Class 363/41)
  • Patent number: 10305274
    Abstract: The present invention is concerned with pre-magnetizing a Modular Multilevel power Converters connected transformer in order to moderate inrush currents upon connecting the transformer to an electric grid. The invention takes advantage of the high amount of stored energy in MMC converters as compared to other converter types. This stored energy is used to pre-magnetize the converter-connected transformer, therefore no additional or dedicated pre-magnetizing hardware is required in addition to the charging hardware provided to charge the converter capacitors. As the transformer pre-magnetizing takes place subsequent to the converter charging, the converter charging circuit is not used to, and therefore does not need to be designed to, directly magnetize the transformer.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: May 28, 2019
    Inventor: Robert Turner
  • Patent number: 10270343
    Abstract: A multiphase power supply includes several constant ON-time (COT) DC-DC converter integrated circuits (ICs), with each COT DC-DC converter IC providing an output voltage of a phase of the multiphase power supply. The COT DC-DC converter ICs are sequentially turned ON one after another in interleaved fashion. A COT DC-DC converter IC receives a control signal at a take pin and, in response, turns ON its output switch. The COT DC-DC converter IC generates another control signal at a pass pin. The next COT DC-DC converter IC turns ON its output switch in response to receiving the other control signal from the previous COT DC-DC converter IC.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: April 23, 2019
    Assignee: Monolithic Power Systems, Inc.
    Inventors: James Nguyen, Yan Dong, Jinghai Zhou, Rohan Samsi
  • Patent number: 10263539
    Abstract: A power converter includes a transformation circuit configured to transform a rectified voltage, and a converter control unit configured to control a switching element of the transformation circuit. The converter control unit calculates a current command value based on a line voltage or the phase voltage, calculates a current deviation between the current command value and the reactor current, and calculates a switching command value from the current deviation. The converter control unit includes a plurality of integrators for the respective different phase angles of a power supply voltage. The integrator corresponding to a power supply phase angle is caused to accumulate the current deviation, and the integrator corresponding to a phase angle that is advanced by a set delay phase from the power supply phase angle is caused to output the control amount. A switching signal is generated with use of the control amount and the switching command value.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: April 16, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenta Yuasa, Shuta Ishikawa, Akihiro Tsumura, Shinsaku Kusube
  • Patent number: 10193467
    Abstract: We describe a power conditioning unit with maximum power point tracking (MPPT) for a dc power source, in particular a photovoltaic panel. A power injection control block has a sense input coupled to an energy storage capacitor on a dc link and controls a dc-to-ac converter to control the injected mains power. The power injection control block tracks the maximum power point by measuring a signal on the dc link which depends on the power drawn from the dc power source, and thus there is no need to measure the dc voltage and current from the dc source. In embodiments the signal is a ripple voltage level and the power injection control block controls an amplitude of an ac current output such that an amount of power transferred to the grid mains is dependent on an amplitude of a sinusoidal voltage component on the energy storage capacitor.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: January 29, 2019
    Assignee: Tesla, Inc.
    Inventors: Lesley Chisenga, Gehan Anil Joseph Amaratunga, Cuauhtemoc Rodriguez
  • Patent number: 10186973
    Abstract: A multi-mode controller applied to a power converter includes a detection range generation module and a gate signal generation unit. The detection range generation module is used for generating a comparison voltage according to a reference current, and generating a detection signal according to the comparison voltage and a first reference voltage. When the detection signal is disabled by a zero-crossing signal, the gate signal generation unit generates a gate control signal corresponding to a quasi-resonant mode of the power converter according to the zero-crossing signal; and when the detection signal is disabled by a continuous-conduction mode signal generated by the detection range generation module according to the comparison voltage and a second reference voltage, the gate signal generation unit generates the gate control signal corresponding to a continuous-conduction mode of the power converter according to the continuous-conduction mode signal.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: January 22, 2019
    Assignee: Leadtrend Technology Corp.
    Inventors: Ming-Chang Tsou, Chih-Chi Chang
  • Patent number: 10177754
    Abstract: Disclosed herein are a method and an apparatus for generating a random PWM voltage reference signal for driving an inverter, which can more simply generate random position PWM (RPPWM) in which a position of an active vector is changed to achieve the same effect as when a switching frequency is changed.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: January 8, 2019
    Assignee: LSIS CO., LTD.
    Inventor: Jin-Kyu Yang
  • Patent number: 10033091
    Abstract: A circuit (4) for establishing a desired impedance value for a radio antenna (5) comprising a transistor (3) having an input (8) and an output terminal (6), and a printed radio frequency transformer comprising a first (1) and a second inductor (2), both inductors (1, 2) having a coupling factor value, and having a first and a second terminal (11, 12; 21, 22). The first terminal (11) of the first inductor (1) is adapted for connecting a radio antenna (5). The input terminal (8) of the transistor (3) is connected to the second terminal (12) of the first inductor (1), and the output terminal (6) of the transistor (3) is connected to the first terminal (21) of the second inductor (2), so that the desired impedance value (Z2) at the second terminal (22) of the second inductor (2) is determined by the inductance value of the second inductor (2).
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: July 24, 2018
    Assignee: ADVANCED AUTOMOTIVE ANTENNAS, S.L.U.
    Inventors: Enrique Martinez Ortigosa, Ramiro Quintero Illera
  • Patent number: 10020765
    Abstract: A gas turbine power generation system is configured by a gas turbine, a main power generator which is coupled to a rotor of the gas turbine through a rotation shaft, a rotation rectifier which converts a three-phase AC current into a DC current and transfers the DC current to a field magnet winding wire of the main power generator, an AC exciter which is configured by an armature winding wire, a d-axis field magnet winding wire, and a q-axis field magnet winding wire, and transfers the three-phase AC current generated at the armature winding wire to the rotation rectifier, an excitation device which drives the AC exciter at the time of start-up of the main power generator, and an excitation power supply which supplies a current to the excitation device.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: July 10, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Michio Kataoka, Masaru Shimomura
  • Patent number: 9933828
    Abstract: Controlling power consumption of a voltage regulator in a computer system that includes computer memory and the voltage regulator is configured to provide regulated source voltage to the computer memory includes: receiving, by a voltage regulator controller, memory margin statistics of the computer memory, the memory margin statistics including data describing operational tolerance of the computer memory to source voltage signal variations; and adjusting, by the voltage regulator controller, one or more operating characteristics of the voltage regulator in dependence upon the memory margin statistics.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: April 3, 2018
    Assignee: Lenovo Enterprise Solutions (Singapore) Pte. Ltd.
    Inventors: Michael Decesaris, Luke D. Remis, Brian C. Totten
  • Patent number: 9923456
    Abstract: A matrix convertor includes a power convertor and a controller. The power convertor is disposed between a power system and a rotating electric machine, and includes a plurality of bidirectional switches. The controller is configured to control an exciting current flowing from the power convertor to the rotating electric machine so as to control a power factor on a side of the power system.
    Type: Grant
    Filed: July 3, 2015
    Date of Patent: March 20, 2018
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Wataru Yoshinaga, Takashi Tanaka, Kentaro Inomata, Kotaro Takeda, Takuya Naka
  • Patent number: 9923505
    Abstract: A system and method of controlling an electric motor using a motor drive controller are provided. The motor drive controller includes a rectifier configured to convert an AC input voltage to a DC voltage, a DC bus electrically coupled to the rectifier, an inverter electrically coupled to the DC bus and configured to generate an AC voltage to drive the electric motor, and a control unit. The control unit includes a sign calculation module configured to determine a polarity of each phase of a reference current command and a compensation module configured to generate a voltage compensation command signal using one of the determined polarities of the reference current command and a measured current, and one of a measurement of DC bus voltage and a constant DC bus voltage value, the voltage compensation signal compensating the drive controller to neutralize a deadtime effect.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: March 20, 2018
    Assignee: Regal Beloit America, Inc.
    Inventor: Yilcan Guzelgunler
  • Patent number: 9893668
    Abstract: Embodiments of the present invention relate to an a method, apparatus and computer program product for controlling the operation of a drive unit comprising a plurality of switching modules arranged to receive a DC electricity supply and generate an AC electricity supply for driving a load from the received DC electricity supply, the AC electricity supply being generated by the switching of the plurality of switching modules between a conducting state and a non-conducting state. The method comprises receiving one or more characteristics associated with each of the switching modules, comparing, for each switching module of the plurality of switching modules, a characteristic of the switching module with an equivalent characteristic associated with one or more other switching modules of the plurality of switching modules, and controlling a time period during which one or more of the plurality of switching modules are in the conducting state in accordance with a result of the comparison.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: February 13, 2018
    Assignee: NIDEC CONTROL TECHNIQUES LIMITED
    Inventors: Simon David Hart, Michael Cade, Richard Mark Wain
  • Patent number: 9882485
    Abstract: Current metering for transitioning to low power operation in switching regulators is disclosed. In an exemplary embodiment, a method is provided that includes generating pulse width modulated charging cycles that enable current to flow to an inductor to adjust an output voltage, and detecting a skipped charging cycle. The method also includes determining whether a number of charging cycles are skipped over a time interval that begins when the skipped charging cycle is detected. The method also includes transitioning to a low power operating mode if it determined that the number of charging cycles have been skipped over the selected time interval. During the low power operating mode pulse frequency modulated charging cycles are generated that enable the current to flow to the inductor to generate the output voltage.
    Type: Grant
    Filed: December 31, 2016
    Date of Patent: January 30, 2018
    Assignee: Active-Semi, Inc.
    Inventors: Narasimhan Trichy, James Allen Kohout
  • Patent number: 9882490
    Abstract: A power stage for a DC-to-DC voltage converter includes a voltage input, a high-side n-channel transistor, a high-side p-channel transistor, and a low-side n-channel transistor. The voltage input is couplable to a supply voltage. The drain terminal of the high-side n-channel transistor is coupled to the voltage input and the source terminal is coupled to a first node that is couplable to an output stage of the DC-to-DC converter. The source terminal of the high-side p-channel transistor is coupled to the voltage input and the drain terminal is coupled to the first node. The drain terminal of the low-side n-channel transistor is coupled to the first node and the source terminal is coupled to a ground.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: January 30, 2018
    Assignee: Texas Instruments Incorporated
    Inventors: Srinivas Venkata Veeramreddi, Murugesh Prashanth Subramaniam
  • Patent number: 9853447
    Abstract: Active droop current sharing among power supply units may regulate output currents of power supply units supplying shared current to a common load. The regulation may employ a combination of droop control and active current control. The shared current may be regulated such that each power supply unit provides a substantially equal share of the total current supplied. A current difference between two power supplies may be regulated to be within a desired maximum threshold for current difference.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: December 26, 2017
    Assignee: Dell Products L.P.
    Inventors: Tsai-Fu Hung, Shih-Chieh Wang, Yi-Chiao Hsu, Chung-Fu Lai
  • Patent number: 9831800
    Abstract: A self-balanced modulation method and a closed-loop magnetic flux rebalancing control method for parallel multilevel inverters. The combination of the two methods provides for balancing of the magnetic flux of the inter-cell transformers (ICTs) of the parallel multilevel inverters without deteriorating the quality of the output voltage. In various embodiments a parallel multi-level inverter modulator is provide including a multi-channel comparator to generate a multiplexed digitized ideal waveform for a parallel multi-level inverter and a finite state machine (FSM) module coupled to the parallel multi-channel comparator, the FSM module to receive the multiplexed digitized ideal waveform and to generate a pulse width modulated gate-drive signal for each switching device of the parallel multi-level inverter. The system and method provides for optimization of the output voltage spectrum without influence the magnetic balancing.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: November 28, 2017
    Assignee: The Florida State University Research Foundation, Inc.
    Inventors: Hui Li, Yanjun Shi
  • Patent number: 9812952
    Abstract: Systems and methods may provide for a transient response apparatus that includes a single stage conversion module having a power input, a power output, and a control input, and a compensation module including a feedback input. The compensation module may be coupled to the power input, the power output and the control input of the single stage conversion module. Additionally, a feedback module may be coupled to the power output of the single stage conversion module and the feedback input of the compensation module. In one example, the feedback module includes a loop controller having a plurality of programmable inputs and an error output, and a modulus unit coupled to the error output of the loop controller and the feedback input of the compensation module.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: November 7, 2017
    Assignee: Intel Corporation
    Inventors: Lilly Huang, Yang-Lin Chen, Vaibhav Vaidya
  • Patent number: 9780692
    Abstract: According to one embodiment, there is provided a control device of a neutral-point-clamped power converter apparatus including a converter configured to convert current which were obtained by passing a d-axis current and a q-axis current of a rotating coordinate system through a filter having a time constant which is greater than an inverse number of a fundamental wave frequency of a three-phase currents, to three-phase currents, and a controller configured to calculate, based on the three-phase currents converted, a zero-phase voltage instruction value for controlling voltages into which a DC input voltage is divided at a neutral point, as an instruction value which is superimposed on three-phase voltage instruction values.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: October 3, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryuta Hasegawa, Teruyuki Ishizuki, Takashi Fujita
  • Patent number: 9780770
    Abstract: A control unit is for a bridge circuit. The control unit may include a signal generator configured to generate first and second periodic drive signals for the bridge circuit, and determine a switch-on duration of the first and second periodic drive signals based upon a first digital data value having a first resolution. The control unit may include a controller configured to receive a second digital data value having a second resolution. The second resolution may be greater than the first resolution. The controller may be configured to generate the first digital data value so that, over periods of the first and second periodic drive signals, the first digital data value corresponds to an average of the second digital data value.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: October 3, 2017
    Assignee: STMicroelectronics S.r.l.
    Inventors: Matteo Scorrano, Giuseppe Maiocchi
  • Patent number: 9748865
    Abstract: Provided is a power conversion device including: a conversion device for each phase which converts DC voltage inputted from a DC power supply, to voltage having an AC waveform to be outputted to each phase with respect to a neutral point of three-phase AC; and a control unit which controls these conversion devices. Each conversion device includes: a first converter which has a DC/DC converter including an isolation transformer, and a capacitor, and which converts the inputted DC voltage to voltage containing a pulsating DC voltage waveform corresponding to the absolute value of the AC waveform to be outputted; and a second converter which is provided at a stage subsequent to the first converter and has a full-bridge inverter, and which inverts the polarity of the voltage containing the pulsating DC voltage waveform, per one cycle, thereby converting the voltage to voltage having the AC waveform.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: August 29, 2017
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Naoki Ayai
  • Patent number: 9742284
    Abstract: A power circuit includes: first and second switching circuits coupled in parallel between an input terminal and an output terminal; a control signal generator that performs an ON/OFF control of the first and second switching circuits individually and generates a first control signal and a second control signal having different phases; a frequency converter that converts a frequency of the first control signal after converting a frequency of the second control signal; and a phase shifter that shifts the phase of the second control signal when a first interrupt is introduced as the first control signal is turned ON after the frequency converter has converted the frequency of the second control signal.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: August 22, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Hisato Hosoyama, Tomotake Sasaki, Yu Yonezawa
  • Patent number: 9735688
    Abstract: An isolated power control device that includes an auxiliary isolated power circuit and a voltage level identification unit is provided. The auxiliary isolated power circuit includes a transformer module, a control module, and a switch module. The transformer module includes a primary side and a secondary side. The control module generates a switch control signal according to a primary side remote on/off control signal. The switch module is conducted according to the switch control signal to transmit an input auxiliary power signal to the primary side of the transformer module such that the auxiliary isolated power circuit generates a target voltage signal having a plurality of voltage levels. The voltage level identification unit receives the target voltage signal to output a secondary side remote on-off control signal to control a main isolated power device.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: August 15, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Zhong-Wang Yang, Sheng-Li Lu, Wen-Hua Li, Qiong Zhang
  • Patent number: 9722505
    Abstract: A wind power conversion system includes plural first converting circuits and a second converting circuit. The plural first converting circuits perform a power converting task, and include respective first generator-side terminals and respective first network-side terminals. The first generator-side terminals are electrically connected with a wind power generator. The first network-side terminals are electrically connected with corresponding secondary windings of an isolating transformer. The second converting circuit includes plural second generator-side terminals and a second network-side terminal. The second network-side terminal is electrically connected with the corresponding secondary winding of plural secondary windings of the isolating transformer. The second generator-side terminals are serially connected with the corresponding first generator-side terminals of the first converting circuits.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: August 1, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Changyong Wang, Li Cai, Yansong Lu, Fei Lu
  • Patent number: 9702938
    Abstract: A method for detecting a phase imbalance of an electrical component in a machine due to an actual fault is provided. The method includes receiving electrical parameter values associated with a plurality of phases of an electrical component, detecting a phase imbalance in the plurality of phases, calculating an imbalance ratio of the plurality of phases, applying a plurality of conditions to the imbalance ratio and to the received input vector, the plurality of conditions being associated with an actual fault in the machine, and determining whether the detected phase imbalance is due to a controls induced imbalance in the machine or due to the actual fault in the electrical component of the machine when at least one of the plurality of conditions is met.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: July 11, 2017
    Assignee: Caterpillar Inc.
    Inventors: Jesse R. Gerdes, Jackson Wai, Ahmed Khalil, Benjamin P. Gottemoller
  • Patent number: 9673654
    Abstract: A multi-stage quick charging system is proposed. The system uses an intermediate power battery as voltage supporting point so that a converter having a fraction of the output voltage may control the entire power flow towards or from the battery of a vehicle or an electrical power device. The intermediate battery comprises several stages in series, associated with respective small chargers allowing a management of the charge balancing of the stages of the intermediate battery, since the chargers may be controlled in order to separately vary the contribution of each stage.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: June 6, 2017
    Assignee: HYDRO-QUÉBEC
    Inventor: François Beauregard
  • Patent number: 9660515
    Abstract: A control method for reducing second-order ripple is adapted to reduce second-order ripple on an input side of a DC-DC conversion device, wherein the input side of the DC-DC conversion device is coupled to a preceding voltage supply device, and an output side of the DC-DC conversion device is coupled to a DC-AC transforming device, characterized in that a voltage control device for controlling the preceding voltage supply device is designed according to a transfer function, and the transfer function is adjusted and controlled with an output voltage of the DC-DC conversion device and an amplitude voltage of pulse width modulation to reduce second-order ripple of an input voltage input to the input side of the DC-DC conversion device, thereby dispensing the need to increase circuits or increase capacitance of components and cutting costs.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: May 23, 2017
    Assignee: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Chi-Sheng Wu, Chih-Hsien Chung, Hsuang-Chang Chiang, Tsang-Li Tai
  • Patent number: 9647575
    Abstract: A power converter fixes, in one cycle of an alternating-current voltage output command, a gate pulse signal to always output a direct-current input positive side terminal voltage value of an inverter circuit in a period X1 centering on a phase angle ?1 for higher potential, fixes a gate pulse signal to always output a direct-current input negative side terminal voltage value of the inverter circuit in a period X2 centering on a phase angle ?2 for lower potential, and outputs a gate pulse signal in which a ratio of a period Y1, which is obtained by excluding the periods X1 and X2 from a period between the phase angle ?1 and the phase angle ?2, and the first period X1, and a ratio of a period Y2, which is obtained by excluding the periods X1 and X2 from a period between the phase angle ?2 and a phase angle ?1+360 [deg].
    Type: Grant
    Filed: September 2, 2013
    Date of Patent: May 9, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hisanori Yamasaki, Sho Kato, Yuruki Okada, Ryo Yokozutsumi
  • Patent number: 9634579
    Abstract: A method of controlling an inverter includes receiving a target waveform for output voltage of an inverter phase, calculating a phase bias for an inverter phase using the target waveform, biasing the target waveform using the phase bias, and generating a switching device command signal by comparing the biased target waveform to a carrier waveform. The switching device command signal has a switching patter that reduces midpoint current in an inverter input lead and common mode voltage in an inverter output lead.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: April 25, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Adam M. White
  • Patent number: 9628000
    Abstract: A method controls a motor using pulse width modulation (PWM). The method involves measuring the PWM frequency; determining the carrier frequency of a set radio transmitter; and matching the PWM frequency to the carrier frequency of the radio transmitter in such a manner that an integer multiple of the PWM frequency corresponds to the carrier frequency or an integer multiple of the PWM frequency lies in the middle between two carrier frequencies.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: April 18, 2017
    Assignees: AUDI AG, CONTI TEMIC MICROELECTRONIC GMBH
    Inventors: Bernhard Schwantner, Georg Kaeufl
  • Patent number: 9621103
    Abstract: A circulating current and oscillating current suppressing method and parallel inverter driver system are disclosed. Each inverter driver outputs a suppressing three-phase current to a motor and has an entity inductance device and a virtual inductance device. The virtual inductance device receives and sums the suppressing three-phase current of the inverter drivers, and generates a compensated three-phase current according to the suppressing three-phase currents, an impedance of the motor and an ideal impedance value generated by a virtual inductance unit and the entity inductance device. Consequently, the oscillating current of the transition three-phase current outputted from a switch device of the inverter driver can be reduced.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: April 11, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Chien-Yu Chi
  • Patent number: 9608461
    Abstract: A battery pack cooling and charging device includes a charging module for a battery pack, a cooling fan, a power source module and a cooling fan control module. The cooling fan control module is capable of controlling the cooling fan for cooling and is connected with the cooling fan. During the charging operation, a rotational speed of the cooling fan for cooling the battery pack and a charging module is changed by detecting parameters such as fan operation time, a battery pack internal resistance, a charging module temperature, and a battery pack voltage. The rotational speed of the cooling fan is reasonably adjusted, thus noise of the cooling fan is reduced and energy consumption is reduced according to different phases of the charging process by regarding one parameter or combinations of parameters as conditions for changing the rotational speed of the fan.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: March 28, 2017
    Assignee: Chevron (HK) Limited
    Inventors: Ming Chen, Junya Duan, Xiaohong Lin
  • Patent number: 9606022
    Abstract: Diagnosing equipment coupled to a generator. A condition of the equipment is diagnosed based on information provided by signals from a generator operationally connected to the equipment or other signals associated with an engine. Different types of degradation are distinguished based on discerning characteristics within the information. Thus, a degraded equipment component can be identified in a manner that reduces service induced delay.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: March 28, 2017
    Assignee: General Electric Company
    Inventors: Ajith Kumar, Somakumar Ramachandrapanicker, Paul Flynn, Arijit Banerjee, Rupam Mukherjee
  • Patent number: 9595862
    Abstract: A system comprises a first T-type inverter and a second T-type inverter connected to a dc power source and a first winding of a transformer, wherein the second T-type inverter is configured to operate with a first phase shift from the first T-type inverter, a third T-type inverter and a fourth T-type inverter connected to the dc power source and a second winding of the transformer, wherein the fourth T-type inverter is configured to operate with a second phase shift from the third T-type inverter and a fifth T-type inverter and a sixth T-type inverter connected to the dc power source and a third winding of the transformer, wherein the sixth T-type inverter is configured to operate with a third phase shift from the fifth T-type inverter.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: March 14, 2017
    Assignee: Futurewei Technologies, Inc.
    Inventors: Dianbo Fu, Yunfeng Liu
  • Patent number: 9577547
    Abstract: A power conversion device converts three-phase AC power into DC power by two-arm PWM modulation control and includes a main circuit that is constituted by a plurality of switching elements that are bridge-connected therein; a voltage-command generation unit that generates a voltage command value for the main circuit; a current detection unit that detects at least one of output currents of the main circuit; a power-factor calculation unit that calculates a power factor on the basis of the output current and the voltage command value; a carrier-signal generation unit that generates a carrier signal of a frequency corresponding to the power factor; and a PWM-signal generation unit 6 that compares the voltage command value and the carrier signal to generate a PWM signal that executes switching control on the switching elements.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: February 21, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Satoshi Taira
  • Patent number: 9555711
    Abstract: A power converter includes a first set of transistors electrically connected in series, a second set of transistors electrically connected in series, and an AC link. The second set of transistors is electrically connected in parallel with the first set of transistors to form an H-bridge. The AC link is electrically connected between the first and second sets of transistors. A plurality of H-bridges are connected in parallel and a three-wire DC bus is electrically connected to the H-bridges.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: January 31, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Adam M. White, Mustansir Kheraluwala, Richard A. Himmelmann
  • Patent number: 9543868
    Abstract: In an apparatus, a first control unit performs current-feedback control, and a second control unit performs torque-feedback control. The torque-feedback control samples values of each output current at phases. The sampled values of each output current at the phases are referred to as phase-related sampled values of the corresponding output current. The apparatus causes the second control unit to sample values of each output current at the predetermined phases while the first control unit is performing the current-feedback control when switching the current-feedback control to the torque-feedback control. The second control unit uses the values of each output current sampled by the first control unit as the phase-related sampled values of the corresponding output current to start the torque-feedback control when the current-feedback control is switched to the torque-feedback control.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: January 10, 2017
    Assignee: DENSO CORPORATION
    Inventor: Hidekazu Takahashi
  • Patent number: 9525411
    Abstract: An embodiment of a power supply circuit to generate a supply voltage for a gate driver circuit can include an isolated power supply circuit to receive a first voltage in a first isolated system and provide power to a cyclic charging power supply circuit, the cyclic charging power supply circuit providing a supply voltage to the gate driver circuit in a second isolated system, the isolated power supply circuit providing the power to the cyclic charging power supply circuit while the gate driver circuit drives a transistor in an on state. The isolated power supply circuit can include a control circuit to regulate the power provided to maintain or increase the supply voltage while the gate driver circuit drives the transistor in an on state. The power supply circuit can also include the cyclic charging power supply circuit to receive a second voltage in the second isolated system and provide the supply voltage to the gate driver circuit.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: December 20, 2016
    Assignee: Analog Devices, Inc.
    Inventors: Kenneth G. Richardson, Ryan Schnell
  • Patent number: 9515578
    Abstract: A control method to be implemented in a power converter, the power converter including an inverter module controlled by a control rule that makes it possible to determine a control voltage to be applied to an electrical load on the basis of a reference control voltage. The control method includes determining a correction value to be applied to the reference control voltage, the correction value being determined from a first filtered voltage obtained by filtering a voltage that is representative of the real measured voltage, and a second filtered voltage obtained by filtering a voltage that is representative of the reference control voltage.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: December 6, 2016
    Assignee: SCHNEIDER TOSHIBA INVERTER EUROPE SAS
    Inventors: Philippe Le Goualec, Francois Malrait, Patrice Ruault
  • Patent number: 9494138
    Abstract: A variable speed wind turbine is provided. The wind turbine comprises a generator, a power converter for converting at least a portion of electrical power generated by the generator, an energy management arrangement coupled to the power converter, the energy management arrangement comprises an energy storage unit, and a controller. The controller is adapted to detect a power imbalance event and to transfer at least a portion of excess electrical energy generated by the generator to the energy storage unit to be stored therein when the power imbalance event is detected.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: November 15, 2016
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Amit Kumar Gupta, Gil Lampong Opina, Jr., Anshuman Tripathi, Yugarajan Karuppanan, Michael Casem Tumabcao
  • Patent number: 9478985
    Abstract: A method of providing electrical power using a split bus configuration includes receiving a first direct current at a positive bus of a split bus, where the first direct current originates from a first fuel cell segment. A second direct current is received at a negative bus of the split bus, where the second direct current originates from a second fuel cell segment. A third direct current is also received at the split bus such that a combined direct current is formed including the first direct current, the second direct current, and the third direct current. The third direct current originates from an alternative direct current (DC) source. The combined direct current is provided to an inverter such that an alternating current is generated for a load.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: October 25, 2016
    Assignee: BLOOM ENERGY CORPORATION
    Inventors: Arne Watson Ballantine, Ramesh Srinivasan, Stuart Aaron, Peter Light, Josh Richman, Ranganathan Gurunathan, Chad Pearson
  • Patent number: 9413267
    Abstract: The present invention relates to a method for feeding an unbalanced, three-phase current into a three-phase AC voltage system, comprising the steps of: producing a positive phase-sequence system for the current to be fed in, producing a negative phase-sequence system for the current to be fed in, superimposing the positive phase-sequence system and the negative phase-sequence system to form the current to be fed in and feeding the current composed in this manner into the three-phase AC voltage system.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: August 9, 2016
    Assignee: WOBBEN PROPERTIES GMBH
    Inventor: Stephan Adloff
  • Patent number: 9397498
    Abstract: Some embodiments teach an electrical device configured to emulate a high frequency electrical noise signal on an electrical power line. The electrical power line is coupled to one or more electrical outlets and the electrical device configured to be coupled to one or more electrical appliances. The electrical device can include: (a) a monitoring module configured to detect usage of electrical power from the electrical power line by a first one of the one or more electrical appliances; (b) an emitter module configured to generate an emulated high frequency electrical noise signal, the emulated high frequency electrical noise signal emulates electrical noise from a switch mode power supply; (c) a first electrical coupling mechanism configured to couple to a first one of the one or more electrical outlets; and (d) a second coupling mechanism configured to couple to the first one of the one or more electrical appliances. Other embodiments are disclosed.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: July 19, 2016
    Assignee: Belkin International, Inc.
    Inventors: Karthik Yogeeswaran, Charles Gillen-O'Neel, Jeffery Garb, Matthew S. Reynolds
  • Patent number: 9385599
    Abstract: A converter circuit is described comprising a switch circuit configured to provide an output voltage, a control circuit comprising an analog control portion and a digital control portion and a noise generator configured to generate white noise, wherein the noise generator is configured to supply the generated white noise to the digital control portion of the control circuit and wherein the control circuit is configured to control the switch circuit based on the white noise.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: July 5, 2016
    Assignee: INFINEON TECHNOLOGIES AUSTRIA AG
    Inventors: Andrea Congiu, Emanuele Bodano, Dirk Hammerschmidt
  • Patent number: 9379551
    Abstract: A line angle shift logic controller for use with a power generation system coupled to an electrical grid is disclosed. The line angle shift controller includes a line angle shift controller configured to receive a phase locked loop (PLL) error signal representative of a difference between a phase angle of the power generation system and a phase angle of the electrical grid, receive a threshold phase from the electrical grid, and generate a PLL shift signal based at least partially on the PLL error signal and the threshold phase.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: June 28, 2016
    Assignee: General Electric Company
    Inventor: Einar Vaughn Larsen
  • Patent number: 9350226
    Abstract: Disclosed is a power control driving device which includes a sine wave signal generating unit; a control signal converting unit configured to convert a sine wave from the sine wave signal generating unit into a multi-bit control signal; and a three-phase inverter circuit configured to output a voltage varied by the multi-bit control signal from the control signal converting unit. The control signal converting unit includes a multi-bit sigma-delta modulator configured to convert an analog sine wave into a digital signal. The three-phase inverter circuit includes a plurality of switch units, on-off states of the plurality of switch units being controlled according to the multi-bit control signal from the control signal converting unit.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 24, 2016
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jaewon Nam, Minki Kim, Jimin Oh, Yil Suk Yang
  • Patent number: 9337748
    Abstract: In accordance with a preferred embodiment of the present invention, an inverter circuit includes a direct current (DC)-to-DC power converter configured to receive an input energy from a device via a first input terminal and a second input terminal, where the DC-to-DC power converter is configured to convert a first portion of the input energy to a DC energy. The inverter circuit also includes an inverter stage coupled to an output of the DC-to-DC power converter, and is connected to the first input terminal of the DC-to-DC power converter and the second input terminal of the DC-to-DC power converter, where the inverter stage is configured to convert a second portion of the input energy to a first output energy.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: May 10, 2016
    Assignee: Infineon Technologies Austria AG
    Inventors: Weifu Yu, Yi Tang
  • Patent number: 9335396
    Abstract: A sensor system includes a microelectromechanical systems (MEMS) sensor, a processor, measurement circuitry, stimulus circuitry and memory. The MEMS sensor is configured to provide an output responsive to physical displacement within the MEMS sensor to the measurement circuitry. The stimulus circuitry is configured to provide a stimulus signal to the MEMS sensor to cause a physical displacement within the MEMS sensor. The measurement circuitry is configured to process the output from the MEMS sensor and provide it to the processor. The processor is configured to generate stimulus signals and provide them to the stimulus circuitry for provision to the MEMS sensor. The processor is configured to monitor the output from the measurement circuitry corresponding to the physical displacement occurring in the MEMS sensor, calculate MEMS sensor characteristics based on the output, and update calibration values based on the output. Methods for monitoring and calibrating MEMS sensors are also provided.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 10, 2016
    Assignee: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Bruno Debeurre, Tehmoor M. Dar, Raimondo P. Sessego
  • Patent number: 9331564
    Abstract: For connecting a PV array via an inverter to an AC power grid, at first a DC link at the input side of the inverter is pre-charged from the AC power grid. A link voltage of the DC link is adjusted to a pre-set value with the inverter connected to the AC power grid, the pre-set value being lower than an open circuit voltage of the PV array, and then the PV array at its open circuit voltage is directly connected to the DC link, while the link voltage is continuously adjusted to the pre-set value.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: May 3, 2016
    Assignee: SMA SOLAR TECHNOLOGY AG
    Inventor: Reinhard Lehmann
  • Patent number: 9306394
    Abstract: A distributed load current sensing system being connected to a power input terminal that is connected to a main power trunk that has one or multiple load branches connected thereto is disclosed to include a power bus connected to the main power trunk, an active power filter connected to the power bus and a load current sensor device coupled with each load branch for sensing the load current of each load branch and providing the sensed signal to the active power filter so that the active power filter can generate a compensation signal accurately.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: April 5, 2016
    Assignee: SHUN-FU TECHNOLOGY CORP.
    Inventors: Yung-Sheng Huang, Shun-Hua Lee
  • Patent number: 9306474
    Abstract: A power conversion system mainly includes an input capacitor bank, a first conversion circuit, a second conversion circuit, and a control circuit. The input capacitor bank has a first capacitor and a second capacitor. The first capacitor and the second capacitor are connected to a neutral point and receive a DC input voltage. The first conversion circuit is connected in parallel to the input capacitor bank, and has a first branch, a second branch, and a first auxiliary branch. The second conversion circuit is connected in parallel to the input capacitor bank, and has a third branch, a fourth branch, and a second auxiliary branch. The control circuit produces a plurality of control signals to correspondingly control the first conversion circuit and the second conversion circuit so as to reduce leakage current caused by parasitic capacitance voltage.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: April 5, 2016
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Hong-Yi Chen, Chen-Wei Ku, Wei-Lun Hsin