For Change Of Phase (e.g., Number Of Phases) Patents (Class 363/36)
  • Patent number: 10211718
    Abstract: According to one embodiment, when an effective value of an input current flowing into a booster circuit rises to a value greater than or equal to a second set value, boosting of the booster circuit is started and, after the start, when the effective value lowers to a value lower than a first set value lower than the second set value, boosting of the booster circuit is stopped. Then, if the three-phase AC source is in an unbalanced state, the first set value is set to a value lower than usual.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: February 19, 2019
    Assignee: TOSHIBA CARRIER CORPORATION
    Inventors: Keiichi Ishida, Akihiro Ishigaya, Masayuki Yoshimura
  • Patent number: 10211753
    Abstract: Provided is a power conversion device including: a step-up converter unit, including a reactor to which a DC voltage is to be input, a switching element connected to the reactor in parallel, and a backflow prevention element connected to the reactor in series; a smoothing capacitor configured to smooth an output voltage from the step-up converter unit; an inverter unit configured to convert the output voltage smoothed in the smoothing capacitor into an AC voltage; a dew condensation state detection unit configured to detect a state of dew condensation, which occurs due to a cooler configured to cool the step-up converter unit and the inverter unit; and a control unit configured to control an operation of the step-up converter unit, wherein the control unit includes: a determination unit configured to determine the state of dew condensation detected by the dew condensation state detection unit; and a step-up control unit configured to control a step-up operation of the step-up converter unit based on a result
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: February 19, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keiwa Tsukano, Shinsaku Kusube, Takahiko Kobayashi, Yoshihiro Taniguchi
  • Patent number: 9887641
    Abstract: A power converter includes: a plurality of external terminals; a grounded earth terminal; a power conversion circuit; a ground conductor; and a plurality of inductors. A plurality of nodes of the power conversion circuit are connected to the respective plurality of external terminals. The power conversion circuit performs power conversion by switching received power. A plurality of inductors are inserted between the plurality of external terminals and the plurality of nodes. Further, another inductor is inserted between the ground conductor and the earth terminal. In this way, there can be provided a power converter that provides a sufficient noise reduction effect also in a high frequency region.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: February 6, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Hiroshi Kitada
  • Patent number: 9887658
    Abstract: When a rectifying duty dr, a discharge duty dc, a voltage between both ends Vc of a capacitor, and a rectified voltage Vrec of an AC voltage are introduced, a virtual DC link voltage in an inverter is expressed by dc·Vc+dr·Vrec. The discharge duty is a time ratio at which a switch is conductive. The rectifying duty has a value obtained by subtracting the discharge duty and a zero voltage duty from 1. The zero voltage duty is a time ratio at which the inverter adopts a zero voltage vector irrespective of the magnitude of a voltage output from the inverter. In a boost chopper, the capacitor is charged during a part of a period during which the virtual DC link voltage is greater than the rectified voltage.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: February 6, 2018
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Naoya Yamashita, Toshiyuki Maeda
  • Patent number: 9812990
    Abstract: Apparatus to provide bypass redundancy for a multiphase multilevel inverter including a spare inverter stage and a switch circuit to connect the spare inverter stage between a selected one of the inverter phase first nodes having a bypassed stage and a common connection node, and to connect the remaining inverter phase first nodes with the common connection node.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: November 7, 2017
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Zhongyuan Cheng, Navid Reza Zargari
  • Patent number: 9740262
    Abstract: A power supply detecting circuit includes a first voltage detecting module configured to detect an input voltage of a power supply module; a micro control unit (MCU) connected to the first voltage detecting module; a display module connected to the MCU; a second voltage detecting module configured to detect an output voltage of the power supply module; and a current detecting module configured to detect an output current of the power supply module. The MCU is capable of comparing the detected input voltage, the detected output voltage, and the detected output current of the power supply module with corresponding predetermined parameters and calculating an output power of the power supply module. The display module is capable of displaying the detected input voltage, the detected output voltage, the detected output current, and the output power of the power supply module.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: August 22, 2017
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Ching-Chung Lin
  • Patent number: 9722520
    Abstract: A method for controlling a variable speed wind turbine generator is disclosed. The generator is connected to a power converter comprising switches. The generator comprises a stator and a set of terminals connected to the stator and to the switches of the power converter. The method comprises: determining a stator flux reference value corresponding to a generator power of a desired magnitude, determining an estimated stator flux value corresponding to an actual generator power, determining a difference between the determined stator flux reference value and the estimated stator flux value, and operating said switches in correspondence to the determined stator flux reference value and the estimated stator flux value to adapt at least one stator electrical quantity to obtain said desired generator power magnitude.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: August 1, 2017
    Assignee: VESTAS WIND SYSTEMS A/S
    Inventors: Anshuman Tripathi, Cao Shu Yu, Allan Holm Jörgensen, Lars Helle
  • Patent number: 9590527
    Abstract: A method for operating an inverter which is connected to an energy supply grid via a transformer for feeding in electrical energy into the energy supply grid, includes measuring output currents and output voltages of the inverter, and actuating power switches of the inverter using actuation signals that are generated as a function of the measured output currents and the measured output voltages at a fundamental frequency of the energy supply grid. The actuation signals are further generated as a function of a harmonic component of the measured output voltages of the inverter at a multiple of the fundamental frequency using a control loop with positive feedback.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: March 7, 2017
    Assignee: SMA SOLAR TECHNOLOGY AG
    Inventors: Vitali Sakschewski, Stijn Stevens, Christian Hardt
  • Patent number: 9306473
    Abstract: The invention relates to a variable rotor speed wind turbine transmitting AC electric power to a utility grid. The wind turbine includes at least one AC generator and at least two power electronic converter units. Further, it includes means for transforming at least one nominal output value of the generator to at least one different nominal input value of the at least two power electronic converter units. The invention also relates to a wind park and a method of transmitting AC electric power to a utility grid from a variable rotor speed wind turbine as well as a method of servicing or inspecting a variable rotor speed wind turbine.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: April 5, 2016
    Assignee: Vestas Wind Systems A/S
    Inventors: Philip Richard Jacobsen Carne Kjaer, Lars Helle
  • Patent number: 9118179
    Abstract: An integrated circuit device comprising at least one analog to digital converter. The at least one ADC comprises at least one input operably coupled to at least one external contact of the integrated circuit device. The integrated circuit device further comprises detection circuitry comprising at least one detection module. The at least one detection module being arranged to receive at a first input thereof an indication of a voltage level at the at least one input of the at least one ADC, compare the received indication to a threshold value, and if the received indication exceeds the threshold value, output an indication that an excessive voltage state at the at least one input of the at least one ADC has been detected.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: August 25, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Alistair Robertson, Carl Culshaw, Alan Devine
  • Patent number: 8982593
    Abstract: Cascade H-Bridge inverters and carrier-based level shift pulse width modulation techniques are presented for generating inverter stage switching control signals, in which carrier waveform levels are selectively shifted to control THD and to mitigate power distribution imbalances within multilevel inverter elements using either complementary carrier or complementary reference modulation techniques.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: March 17, 2015
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Thomas Nondahl, Jingbo Liu, Zhongyuan Cheng, Navid Zargari
  • Patent number: 8837119
    Abstract: A matrix converter includes first to third AC reactors connected in series with first- to third-phase outputs of three-phase AC electric power, and a first cooling fan that generates cool air for cooling the first to third AC reactors. The first to third AC reactors are arranged side-by-side in a direction intersecting a direction in which the cool air flows.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: September 16, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Kazutaka Kishimoto, Makoto Kojyo, Takahiro Uchino
  • Publication number: 20140160811
    Abstract: A railway power conditioner includes a DC-AC converter and a AC-DC converter for performing power conversion between AC power and DC power, a DC bus connected between the DC-AC converter and the AC-DC converter; a single-phase isolation transformer coupled to an output of the AC-DC converter and a coupling capacitor connected to the DC-AC converter.
    Type: Application
    Filed: December 10, 2012
    Publication date: June 12, 2014
    Applicant: UNIVERSITY OF MACAU
    Inventors: Man Chung WONG, Ning Yi DAI, Keng Weng LAO, Chi Kong WONG
  • Patent number: 8681515
    Abstract: An energy generation system includes an inverter for converting a DC voltage into an AC voltage, a three-phase/two-phase transformer for transforming an output of the inverter into a three-phase/two-phase stationary coordinate system, a phase locked loop for calculating the phase and frequency of an output voltage of the inverter, a phase shifter for generating a current phase reference value, a current reference coordinate transformer for transforming the current phase reference value and the current amplitude reference value into a two-phase stationary coordinate system, a current phase calculator for outputting a current phase calculation value, a current phase calculator for outputting a current amplitude calculation value, a current adjuster for generating a current adjustment signal, an output three-phase transformer for transforming the current adjustment signal into a current adjustment signal in a three-phase stationary coordinate system, and a PWM controller for outputting a PWM control signal.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: March 25, 2014
    Assignee: Kaco New Energy Inc.
    Inventors: Young Sang Bae, Seong Jin Oh, Kyoung Hwan Kim
  • Publication number: 20140056038
    Abstract: The AC converter converts a single-phase input AC voltage with a frequency f0 into a three-phase output AC voltage with a frequency f1 that is lower than f0. The AC converter includes a switching section 101 with multiple switching elements and a switching control section 103 that controls the conduction states of the respective switching elements. The switching control section 103 supplies pulses that have been subjected to a pulse density modulation based on space vector modulation to the switching section 101, thereby getting the conversion into a three-phase output AC voltage done.
    Type: Application
    Filed: November 15, 2012
    Publication date: February 27, 2014
    Applicant: Panasonic Corporation
    Inventors: Hiroshi Yamamoto, Junichi Itoh
  • Publication number: 20140043870
    Abstract: A voltage source inverter comprises a zigzag transformer providing a neutral point. A rectifier unit comprises three single phase boost converters each connected to one of the three phases of AC power and the neutral point and comprising a bridge rectifier converting single phase AC power to DC power and using a boost inductor with a boost switch and blocking diode to develop a DC output. An inverter receives DC power and converts DC power to AC power. A link circuit is connected between each boost converter DC output and the inverter circuit and comprises a DC bus having first and second rails to provide a relatively fixed DC voltage for the inverter and a DC bus capacitance across the first and second rails to smooth voltage ripple. A switch controller controls operation of the boost switches using average current control for each of the boost converters.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 13, 2014
    Inventor: Mahesh M. Swamy
  • Patent number: 8482230
    Abstract: The present invention relates to an electric device for driving mechanical equipment comprising an alternating current motor and an inverter, the said inverter comprising, for each phase of the said motor, an H bridge structure comprising four switching elements distributed over two branches connecting two terminals of the said H bridge structure and intended to supply the winding of the said at least one phase of the motor, the said winding being a winding with a mid point and the said electric device being characterized in that it also comprises, for each phase of the said motor, an energy storage unit, in particular a supercondenser, connected, on the one hand, to the mid point of the winding of the concerned phase of the motor and, on the other hand, to a terminal of the H bridge structure supplying the said winding.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: July 9, 2013
    Assignee: Valeo Systemes de Controle Moteur
    Inventors: Boris Bouchez, Luis de Sousa
  • Patent number: 8462522
    Abstract: A device for connecting at least one single-phase power supply line which, in particular, feeds the overhead line of a railroad track, to a three-phase power supply network. A primary side of a transformer is connected to the power supply network and a secondary side is connected to the single-phase power supply line and to a ground connection. A symmetry device is connected to a phase of the transformer, to the ground connection, and to the single-phase power supply line.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: June 11, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rainer Gruber, Ulrich Halfmann, Wolfgang Recker
  • Publication number: 20130070489
    Abstract: The disclosure discloses an electric energy conversion device and system, to solve the problems of severe harmonic pollution, low power factor during the electric energy feedback from a power generation device to a power grid in the conventional art. The electric energy conversion device comprises: a plurality of single-phase rectifier bridge circuits, a first input ends of the a plurality of single-phase rectifier bridge circuits, and a second input ends of the a plurality of single-phase rectifier bridge circuits, wherein two input ends of each three-phase fully-controlled bridge circuit are connected with two output ends of each the rectifier bridge circuit respectively. Through the technical solution of the disclosure, the waveform coefficient of the current of the power generation device is improved, the harmonic wave is reduced, and the power factor is improved.
    Type: Application
    Filed: August 18, 2010
    Publication date: March 21, 2013
    Applicant: NEW ENERGY POWER COMPANY
    Inventor: Dongsheng Zhang
  • Patent number: 8335094
    Abstract: A current control circuit (active element) is provided that is connected between a rectifier of a DC power source and a smoothing capacitor in a power frequency converter and that controls a variation in the rectified current caused by a variation in the instantaneous power consumption of the load device. When the rectified current increases, the current control circuit limits the current to have a reference current value or lower and, when the rectified current decreases, the current control circuit increases the current to have a value close to the reference current to thereby suppress the rectified current from the rectifier to a substantially-constant value. This consequently mitigates the influence on the primary power source by the variation in the instantaneous power consumption of the load device, thus clearing the Load Demand Variation specification required for the power source to be used in an aircraft.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: December 18, 2012
    Assignee: Jamco Corporation
    Inventors: Mineo Mizukami, Hiroyuki Hozumi, Tatsuya Yamaguchi
  • Publication number: 20120307531
    Abstract: Three resonance-based universal power converter topologies are disclosed. One includes a partially resonant parallel L-C link and incorporates intermediate cross-over switching circuits between the link stage and each of the input and output stages (which are constructed using unidirectional switches), thereby permitting the partially resonant circuit to be operated bi-directionally. A second includes a partially resonant series LC link in parallel with the input and output networks. A third includes a partially resonant series LC link in series between the input and output networks. The input and output networks can be formed from either bidirectional switches or a combination of unidirectional switches and intermediate cross-over switching circuits, permitting the partially resonant circuit to be operated bi-directionally.
    Type: Application
    Filed: June 1, 2012
    Publication date: December 6, 2012
    Applicant: TEXAS A&M UNIVERSITY SYSTEM
    Inventors: Hamid A. Toliyat, Mahshid Amirabadi
  • Publication number: 20120275200
    Abstract: A resonant circuit inverter with a rectifier, a DC link circuit and an inverter including controllable switches. The resonant circuit inverter has a first control means, with which the operating point (Ap) of the resonant circuit inverter determined by a phase angle between an output current (Iist) and a voltage (Uist) at the output of the resonant circuit inverter is controlled. The first control means determines frequency of the output current (Iist). The resonant circuit inverter has a phase detector for determining an actual phase angle as a function of a zero crossing of the output current (Iist). The resonant circuit inverter has means for detecting a zero crossing of the output current (Iist). For determining the actual phase angle, the difference (Ti?Tt) is determined from measured time (Ti) and a known dead time (Tt).
    Type: Application
    Filed: November 18, 2011
    Publication date: November 1, 2012
    Inventors: Liviu BAJAN, Samir ELGHARIB
  • Patent number: 8295957
    Abstract: There is provided a method of customizing an audio presentation for tailoring to a predetermined event sequence, one embodiment comprising identifying the predetermined event sequence from a predetermined event sequence database, associating a first audio asset with one or more selected events of the predetermined event sequence, synchronizing the timing of the first audio assets with the timing of the selected events, and linking the first audio assets to produce a customized audio presentation tailored to the predetermined event sequence. In one embodiment, the method includes downloading an interactive audio presentation content including an interactive audio presentation program, an audio assets database, and the predetermined event sequence database to a client computer. In one embodiment, a system for customizing an audio presentation tailored to a predetermined event sequence comprises a client computer, a client memory located on the client computer, and interactive audio presentation content.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: October 23, 2012
    Assignee: Disney Enterprises, Inc.
    Inventors: Roger Holzberg, Edward Kummer, Jeffrey Voris, Joshua Rhoades, Seth Mendelsohn, Jarett Smith
  • Patent number: 8288958
    Abstract: A controller device and corresponding method for modifying an AC input power to provide a reduced power AC output power to a load when coupled to the controller device. The AC output power has a series of cut-out pulses in half cycles of the AC output power waveform. The device includes a switching system having a plurality of switching elements for positioning the series of cut-out pulses in the half cycles of a waveform of the AC input power to result in said reduced power AC output power; and a switch control system for coordinating opening and closing of the plurality of switching elements during positioning of the series of cut-out pulses. The switch control system includes a synchronization system for synchronizing the switching system with timing of said half cycles of the AC input power waveform; wherein the series of cut-out pulses includes at least two cut-out pulses having different durations and different positioning in said half cycles.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: October 16, 2012
    Inventor: Vito Rinaldi
  • Patent number: 8217533
    Abstract: A method of controlling a plurality of power converters 1a, 1b and 1c can be used to interface to a supply network, ac busbar etc. Each power converter includes a network bridge 14 operating in accordance with a pulse width modulation (PWM) strategy having the same switching period and which causes at least one unwanted harmonic in the supply network voltage. The method includes the step of providing the switching period of the PWM strategy of each network bridge with a different time offset relative to a time datum such that the at least one unwanted harmonic in the supply network voltage is at least partially cancelled. Two alternative ways of providing the time offset are described.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: July 10, 2012
    Assignee: Converteam Technology Ltd
    Inventors: Rodney Jones, Robert Vernon Fulcher, Henrik Stiesdal
  • Patent number: 8143743
    Abstract: A method of controlling an uninterruptible power supply apparatus (UPS) is provided. The UPS apparatus includes at least an AC input voltage, a DC input voltage and a single-phase AC/AC converter. The single-phase AC/AC converter includes an AC inductor, a bus capacitor, a boost arm, a common arm and a buck arm. The method includes steps of: controlling the bus voltage to have a DC component and full-wave rectifying component, and setting a bus voltage parameter K so that the bus voltage approaches to a full-wave rectifying voltage when K approaches to 1, wherein 0?K?1.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: March 27, 2012
    Assignee: Delta Electronics, Inc.
    Inventors: Yan-Song Lu, Jing-Tao Tan, Jian-Ping Yang, Jian-Ping Ying
  • Patent number: 8102682
    Abstract: A circuit 1 for controlling the supply of electrical power to an induction coil 2, in particular to an induction coil 2 for heating a shrink attachment for tools, comprises a rectifier 3, having an input 3a, 3b, 3c for feeding an input power, and a rectifier output. The circuit 1 furthermore comprises an inverter 5 for putting out an AC-voltage, having an input and an inverter output 5a, 5b for connecting the induction coil 2, an intermediary circuit 4 for connecting the rectifier 3 with the inverter 5, and a regulation unit for regulating the power supplied to the induction coil 2. A measurement apparatus 6 for measuring a voltage A2 as an input variable for the regulation unit is connected to the output side of the inverter 5. A respective method for regulating the power supplied to the induction coil 2 comprises a regulation step, in which the current A2 supplied to the induction coil 2 is used as an input variable for the regulation of the power supplied to the induction coil 2.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: January 24, 2012
    Assignee: Franz Haimer Maschinebau KG
    Inventors: Franz Haimer, Ji{hacek over (r)}i Fo{hacek over (r)}t
  • Patent number: 8054657
    Abstract: A static converter includes a current converter on the three-phase side and a current converter on the single-phase side, which are electrically conductively linked to one another on the DC voltage side, and which are respectively electrically conductively connected on the AC voltage side to a feeding three-phase network and a single-phase receiving network. According to an embodiment of the invention, one network-commutated current converter is provided as the current converter on the three-phase side, wherein the current converter on the single-phase side has two phase modules which are connected in parallel on the DC voltage side and whose current converter branches each have at least one two-pole subsystem. This results in a static converter which is simpler and costs less than a known static converter.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: November 8, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rainer Gruber, Ulrich Halfmann, Marc Hiller, Wolfgang Recker
  • Patent number: 7973491
    Abstract: A multi-lamp backlight apparatus is disclosed. The multi-lamp backlight apparatus includes 2N lamps, N balancing transformers, and a high-voltage power source. N is a positive integer and k is an integer index ranging from 1 to N. The kth balancing transformer among the N balancing transformers includes a first primary winding, a second primary winding, and a secondary winding. The first primary winding connects in series with the (2k?1)th lamp of the 2N lamps. The second primary winding connects in series with the first primary winding and the (2k)th lamp. The secondary winding corresponds to the first primary winding and the second primary winding. The high-voltage power source is connected between the first primary windings and the second primary windings.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: July 5, 2011
    Assignee: Darfon Electronics Corp.
    Inventors: Ming-Feng Liu, Chao-Jung Lin
  • Patent number: 7957135
    Abstract: A semiconductor module has switching semiconductor elements connected in parallel to each other and at least a free wheeling semiconductor element reversely connected in parallel to the switching semiconductor elements. The free wheeling semiconductor element is placed between the switching semiconductor elements. At both end parts of the semiconductor elements, each of the switching semiconductor elements is placed. A longitudinal side of each of the switching semiconductor elements and the free wheeling semiconductor element is placed in parallel to a short side of the semiconductor module. An electric-power conversion device has a plurality of arms. Each arm is composed of the semiconductor elements.
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: June 7, 2011
    Assignee: Denso Corporation
    Inventors: Yasuyuki Ohkouchi, Kuniaki Mamitsu
  • Patent number: 7848120
    Abstract: A voltage-sourced High-Voltage Direct Current (HVDC) apparatus, which converts 3-phase AC voltage from a 3-phase AC power source into high voltage DC through a rectifier including switching elements, is provided. In the apparatus, a rectifier controller receives detected 3-phase currents, apparent power, and active power and generates D and Q-axis signals. A D/Q controller receives the signals and generates active power D-axis signal and apparent power Q-axis signal. A PWM unit generates PWM on/off signals for turning on/off the switching elements based on output signals from the D/Q controller. The D/Q controller includes a rotary converter to convert the D and Q-axis signals into AC signals and D and Q-axis order units coupled thereto, and generates the D and Q-axis signals through the order units. The PWM unit converts the D and Q-axis signals into 3-phase AC signals and compares them with 3-phase triangular waves to generate on/off signals for turning on/off the switching elements.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: December 7, 2010
    Assignee: Korea Electric Power Corporation
    Inventors: Jung Seok Lee, Chan Ki Kim, Noh Hong Kwak, Jae Won Chang, Seok Jin Lee, Hyoung Bae Moon
  • Patent number: 7777428
    Abstract: Disclosed are an apparatus and a method for controlling driving of a lamp. The apparatus for controlling driving of a lamp includes a plurality of lamps, a switching module for switching supplied power to output an alternating current (AC) signal, a trans-module for converting the alternating signal into high-voltage signals having different phases to supply the high-voltage signals to the lamps, an open lamp detecting module for adding low-voltage signals having different phases feedback from the trans-module to detect open states of the lamps, and a controller for controlling an operation of the switching module by a signal detected in the open lamp detecting module.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: August 17, 2010
    Assignee: LG Innotek Co., Ltd.
    Inventors: Taek Soo Kim, Hyun Sik Kim
  • Publication number: 20100091529
    Abstract: An electrical energy converter (100) arranged to be connected to at least one source of electrical energy (114, 116) and to condition the energy generated by that source to be suitable for feeding to a network (110) to which the converter (100) may be connected, the converter (100) comprising an input conversion stage (104) having at least three input terminals (P1-6) and a controller, the controller (112) being arranged to configure each of the terminals (p1-6) to accept any one of the following input types: 1. a phase of a polyphase supply; 2. one side of a single phase supply; 3. one side of a DC supply; and 4. no-input.
    Type: Application
    Filed: December 14, 2007
    Publication date: April 15, 2010
    Applicant: Gendrive Limited
    Inventors: Nigel Jakeman, Damyn James Musgrave
  • Patent number: 7609534
    Abstract: A powering arrangement (32, 34) for a device (30, 22) that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature component is estimated based upon a numerical derivative of the direct component. The direct component is also provided to a current regulator in a feed forward control manner, which minimizes error.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: October 27, 2009
    Assignee: Otis Elevator Company
    Inventors: Ismail Agirman, Vladimir Blasko, Christopher Czerwinski
  • Publication number: 20090196078
    Abstract: A static converter includes a current converter on the three-phase side and a current converter on the single-phase side, which are electrically conductively linked to one another on the DC voltage side, and which are respectively electrically conductively connected on the AC voltage side to a feeding three-phase network and a single-phase receiving network. According to an embodiment of the invention, one network-commutated current converter is provided as the current converter on the three-phase side, wherein the current converter on the single-phase side has two phase modules which are connected in parallel on the DC voltage side and whose current converter branches each have at least one two-pole subsystem. This results in a static converter which is simpler and costs less than a known static converter.
    Type: Application
    Filed: February 4, 2009
    Publication date: August 6, 2009
    Inventors: Rainer Gruber, Ulrich Halfmann, Marc Hiller, Wolfgang Recker
  • Patent number: 7561451
    Abstract: In a power converter apparatus, such as an uninterruptible power supply, a phase reference signal is generated responsive to a DC voltage on a DC bus. A magnitude reference signal may be generated responsive to a phase current of an AC bus and/or the DC voltage on the DC bus. Power is transferred between the AC and DC busses responsive to the phase reference signal and the magnitude reference signal. Generation of the phase reference signal may include generating a DC voltage error signal responsive to the DC voltage on the DC bus, generating a phase offset signal responsive to the DC voltage error signal, and generating the phase reference signal responsive to the phase offset signal. Generation of the magnitude reference signal may include generating a volt-amperes reactive (VAR) error signal responsive to the phase current and generating the magnitude reference signal responsive to the VAR error signal.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: July 14, 2009
    Assignee: Eaton Corporation
    Inventors: John G. Tracy, Hans-Erik Pfitzer, Keith Bauman
  • Publication number: 20090175059
    Abstract: A converter section converts a three-phase ac input voltage into a dc voltage, and an inverter section converts the dc voltage converted by the converter section into a prescribed three-phase ac output voltage. The converter section converts the three-phase ac input voltage into the dc voltage on the basis of trapezoidal waveform voltage instruction signals from a trapezoidal waveform voltage instruction signal generating part and a carrier signal from a carrier signal generating part. The inverter section converts the dc voltage converted by the converter section 1 into a prescribed three-phase ac output voltage on the basis of an inverter section instruction signal corrected by an instruction signal correcting part. The trapezoidal waveform voltage instruction signal generating part generates sloped regions of the trapezoidal waveform voltage instruction signals by using a prescribed table.
    Type: Application
    Filed: April 17, 2007
    Publication date: July 9, 2009
    Applicant: Daikin Industries, Ltd.
    Inventor: Kenichi Sakakibara
  • Publication number: 20090059625
    Abstract: Single-phase to three-phase converter comprising a rectifier stage, a DC link and an inverter stage, wherein the rectifier comprises a filter choke, one controllable switch for power factor correction, rectifying diodes arranged in a diode bridge configuration having input terminals and output terminals, the controllable switch being connected to the output terminals of the diode bridge, an upper blocking diode arranged between the positive output terminal of the diode bridge and the positive input of the DC link and a lower blocking diode arranged between the negative output terminal of the diode bridge and the negative input of the DC link, the DC link comprises a capacitor bank connected between the DC link, which capacitor bank has a center point.
    Type: Application
    Filed: August 22, 2008
    Publication date: March 5, 2009
    Applicant: ABB OY
    Inventors: Tero VIITANEN, Erkki NIEMI
  • Patent number: 7495936
    Abstract: A three-phase voltage-fed AC/DC converter includes a conversion circuit which converts power from a DC voltage source to three-phase AC power. The converter further includes a UM conversion circuit which carries out dq conversion of the three-phase output voltage, a superior voltage control circuit which outputs a voltage reference vector based on a superior reference vector and an output voltage vector obtained by the UM conversion circuit, an inferior voltage control circuit which outputs a PWM reference based on the voltage reference vector and the output voltage vector, and a frequency control circuit which synchronizes a value generated based on a q-axis component from the UM conversion circuit with a rotation angle of a conversion matrix in the UM conversion circuit.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: February 24, 2009
    Assignee: Origin Electric Co., Ltd.
    Inventors: Masaaki Ohshima, Hirokazu Shimizu, Shuichi Ushiki, Jirou Fukui
  • Patent number: 7471525
    Abstract: A converter includes a converter circuit 1 having a plurality of bridge-connected semiconductor switching devices for converting AC power into DC power, a smoothing condenser connected in parallel to the DC side of the converter circuit and a current detector provided in a condenser circuit to control a condenser current flowing through the smoothing condenser to be a set value. The condenser current is controlled to be the set value (e.g. zero) to thereby reduce the capacity of the smoothing condenser and make the converter small.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: December 30, 2008
    Assignee: Hitachi Appliances, Inc.
    Inventors: Takahiro Suzuki, Yoshitaka Iwaji, Tsunehiro Endo, Yasuo Notohara, Yoshiaki Kurita, Tatsuo Ando, Chikara Tanaka
  • Patent number: 7430132
    Abstract: A medium or high voltage multi-inverter system is described, in which multiple inverter cells are included in a phase line to increase the voltage level supported by the system, and support higher voltage loads such as AC three-phase motors. In one configuration, five cells are used: two each in two phase lines, and one in a third phase line. In one of the phase lines having two cells, a second cell is series connected in reverse polarity, generates a phase matching the phase of the third line, while the other cell in the phase line generates an output with a different phase. One or more failure switches may be included to allow for short-circuiting of the output poles of one or more of the cells, so that in case of cell failure, the system can continue operation. For example, switches may be employed for the second cells in the two phase lines having two cells, and those cells may be available as spare cells in case of a cell failure.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: September 30, 2008
    Assignee: Toshiba International Corporation
    Inventor: Takashi Morishita
  • Patent number: 7414870
    Abstract: An inverter includes an intermediate circuit, inverter bridge branches downstream of the intermediate circuit for outputting a power signal, and a controller operable for individually turning on and off the inverter bridge branches. The controller may individually turn on and off the inverter bridge branches as a function of an electrical quantity. The electrical quantity may be indicative of a voltage or a change in voltage occurring in the intermediate circuit during operation of the inverter. The electrical quantity may be indicative of the output power signal. The inverter bridge branches may include three inverter bridge branches.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: August 19, 2008
    Assignee: Kostal Industrie Elektrik GmbH
    Inventors: Dieter Röttger, Thomas Vogel
  • Publication number: 20080104983
    Abstract: A multiphase current supplying circuit according to the present invention includes a diode bridge, an intervening circuit, an inverter, a control circuit, and a lightning arrester. The diode bridge is connected to a single-phase AC power supply system via the lightning arrester, and performs full-wave rectification on a single-phase AC voltage. The intervening circuit includes a capacitor and an inductor, and is constituted by a choke input type low-pass filter. More specifically, one end of the inductor and one end of the capacitor are connected, output from the diode bridge is received between the other end of the inductor and the other end of the capacitor, and a rectified voltage generated at both ends of the capacitor is output to the inverter.
    Type: Application
    Filed: November 16, 2005
    Publication date: May 8, 2008
    Applicant: Daikin Industries, Ltd.
    Inventors: Hiroyuki Yamai, Morimitsu Sekimoto
  • Patent number: 7280377
    Abstract: Consistent with an aspect of the present disclosure, a backup fuel cell, for example, is coupled to a utility power grid, through a power conversion circuit. The power conversion circuit may include an inverter circuit, pulse generating circuit and control circuit. The inverter circuit is configured to receive a DC signal and output a first AC signal, and the pulse generating circuit generates a pulse signal in response to a change in a parameter associated with a second utility generated AC signal. The control circuit is coupled to the inverter circuit, and is configured to receive the pulse signal. In addition, the control circuit supplies a control signal to the inverter circuit to adjust a parameter associated with the first AC signal in response to the pulse.
    Type: Grant
    Filed: August 16, 2004
    Date of Patent: October 9, 2007
    Assignee: Caterpillar Inc.
    Inventor: James P. Johnson
  • Patent number: 7274579
    Abstract: A converter circuit for converting an output voltage from an AC power supply includes a rectifier circuit for rectifying the output voltage of the AC power supply; first and second capacitors connected in series, for smoothing the output of the rectifier circuit; and a switch circuit for switching the connections between the respective capacitors and the AC power supply so that the output voltage of the AC power supply is applied to each of the respective capacitors at a cycle that is shorter than the cycle of the AC power supply.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: September 25, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mitsuo Ueda, Hideki Nakata, Masanori Ogawa
  • Patent number: 7075268
    Abstract: A system and method are provided to increase the horsepower of an induction motor. One technique for increasing the horsepower of a motor is to connect the motor to a variable speed drive that is providing an output voltage and frequency greater than the standard line voltage and frequency. The connection of the variable speed drive to the induction motor enables the motor to be operated in constant flux or constant volts/Hz mode and provide a greater output horsepower. Another technique for increasing the horsepower of a motor is to use a dual voltage motor configured for lower voltage operation and then provide the motor with the corresponding voltage and frequency for higher voltage operation. The higher voltage and higher frequency can be provided by a variable speed drive with or without voltage boost. A variable speed drive without voltage boost, but with frequency boost, can be used in situations where the standard main voltage is greater than the lower voltage rating.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: July 11, 2006
    Assignee: York International Corporation
    Inventors: Frank Eugene Wills, Harold Robert Schnetzka
  • Patent number: 6937484
    Abstract: A plurality of control power sources of voltage specifications different from one another are constructed. A generator output converted by a converter into a DC current is converted by an inverter into an AC current of a predetermined frequency. The generation output is rectified by second rectifier circuits and a capacitor and is then input to an RCC. The RCC constitutes a self-excited oscillation circuit, energy is stored into a transformer in an ON time of a transistor corresponding to an oscillation frequency thereof, and the energy is transferred to a secondary side in an OFF time. In the secondary side of the RCC, windings are formed corresponding to the number of required power sources. One group of windings forms both positive and negative power sources of a control power source, and another group of windings forms a power source for an FET driver.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: August 30, 2005
    Assignee: Honda Motor Co., Ltd.
    Inventors: Masashi Nakamura, Motohiro Shimizu, Kazufumi Muronoi
  • Patent number: 6864660
    Abstract: A method and a device for realizing an effective value of a quantity to be varied in an electrical load connected to a multi-phase switchable DC/AC frequency convertor comprising a plurality of controllable switches. The value is realized by varying a current or a voltage delivered by the DC/AC frequency convertor through suitable switching of the switches thereof, and wherein the quantity exhibits a load angle which, averaged in time, leads or lags the voltage or current being delivered.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: March 8, 2005
    Assignee: GTI Electroproject B.V.
    Inventor: Andre Veltman
  • Patent number: 6831849
    Abstract: A system for controlling multiple vehicle includes a twelve volt (12V)/forty-two volt (42V) battery power distribution system that provides direct current. The system converts single phase alternating current to multiple phase alternating current to simultaneously power multiple vehicle systems. A single pulse width modulation generator converts the direct current from the 12V/42V battery power distribution system to alternating current. This provides one power supply path of alternating current, which has a first phase. A splitter device splits the one power supply path of alternating current into three power paths. A lead/lag circuit is used to shift the alternating current of the second path to a second phase different than the first phase of the first power supply path. A second lead/lag circuit for shifts the alternating current of the third path to a third phase different than the first phase or the second phase. This creates a three-phase alternating current power from a single direct current source.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: December 14, 2004
    Assignee: Meritor Light Vehicle Technology, LLC
    Inventors: Craig Rae Fowler, Dennis A. Kramer, Jerome Quere, Enrico Fin, George Chene, Stephen Chiu, Pascal Garrido, Ira B. Goldberg, Charles Hopson, David M. Barry, Dan Rogovin
  • Patent number: 6531843
    Abstract: The present invention provides a control algorithm which instantaneously detects magnetic pole positions in the inside of a motor including polarities of the motor. A controller 1 applies a minute voltage change vhd to a voltage command on a dc axis which constitutes an estimation magnetic pole axis of the motor 3, detects electric currents Idc, Iqc of a motor 3 and discriminates the polarities of the magnetic pole axes by making use of the difference between a cycle in which ripple components of the electric currents Idc, Iqc become positive and a cycle in which the ripple components become negative or the difference between positive-side and negative-side current change rates. Further, the minute voltage change vhd with respect to the above-mentioned voltage command is generated on both of the dc axis and the qc axis rectangular thereto, and the magnetic pole positions of the motor are directly estimated based on the current ripple components on the respective axes.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: March 11, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Yoshitaka Iwaji, Tsunehiro Endo, Hiroshi Fujii, Tatsuo Ando