Double-ended (i.e., Push-pull), Separately-driven Type Patents (Class 363/24)
  • Patent number: 11075575
    Abstract: A resonant converter is disclosed, including: a primary side circuit including at least one set of primary side switches, where the primary side circuit is configured to receive an input voltage; a resonant network coupled to the primary side circuit; a transformer having a primary side winding and a secondary side winding, where the primary side winding is coupled to the resonant network; a secondary side circuit including at least one set of secondary side switches, where the secondary side circuit is coupled to the secondary side winding of the transformer; and a control block that controls the secondary side switches according to the input voltage, the output voltage and the current detection signal, so that the secondary side winding of the transformer is short-circuited during a preset time interval before operating state of the primary side switches changes.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: July 27, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Tao Wei, Hao Lu
  • Patent number: 11038477
    Abstract: In some implementations, there is provided an apparatus comprising a resonant amplifier circuit including a first inductor having a first inductive input and a first inductive output; a second inductor having a second inductive input and a second inductive output; a first switch coupled to the first inductive output; and a second switch coupled to the second inductive output, wherein the first switch and the second switched are driven out of phase, wherein the first inductor is configured to be resonant with a first capacitance associated with the first switch, and wherein the second inductor is configured to be resonant with a second capacitance associated with the second switch. Related systems and articles of manufacture are also provided.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: June 15, 2021
    Assignee: Airily Technologies, LLC
    Inventors: Luke Christopher Raymond, Johan Oscar Lennart Andreasson, Wei Liang
  • Patent number: 10998823
    Abstract: A resonant DC-DC converter for generating high voltage MHz bi-polar DC pulses includes a left multi-level resonant rectifier bank [100] connected to a positive electrode [104] and coupled via capacitive isolation to a left RF amplifier terminal [128]; a right multi-level resonant rectifier bank [102] connected to a negative electrode [106] and coupled via capacitive isolation to a right RF amplifier terminal [130]. Each multi-level resonant rectifier bank comprises multiple resonant rectifier stages [112-122], where each stage comprises two capacitors for capacitively isolating the stage, an output capacitor, a MOSFET switch connected to an adjacent MOSFET switch of an adjacent stage, and a gating resonant circuit connected to the MOSFET switch, whereby MOSFET switches in the banks can be passively controlled by RF signals from a left RF amplifier and a right RF amplifier.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: May 4, 2021
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Luke C. Raymond, Wei Liang, Kawin Surakitbovorn, Juan M. Rivas Davila
  • Patent number: 10886859
    Abstract: The alternating-current power supply device 1 has: an alternating-current generation bridge 10 for obtaining an alternating-current output; PWM control bridges 20, 30, each including two switch components; and a coupling reactor 40 connected to the PWM control bridges 20, 30. The coupling reactor 40 includes: a core 43; and windings 41, 42 which are connected at one end to respective output ends of the PWM control bridges 20, 30 while being coupled with each other via the core 43. The windings 41, 42 are respectively wound in such directions that magnetic fluxes generated in the core 43 cancel each other out.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: January 5, 2021
    Assignee: ROHM CO., LTD.
    Inventors: Hirotaka Otake, Yusuke Nakakohara, Mamoru Tsuruya
  • Patent number: 10826405
    Abstract: According to an aspect of this disclosure, a circuit includes a voltage source and an output load, first and second resonant modules disposed between the voltage source and the output load, and first and second transformers. The circuit is further arranged such that the first transformer is disposed between the first resonant module and the output load, and the second transformer is disposed between the second resonant module and the output load. The circuit also includes a plurality of half-bridges coupled between the first and second resonant modules and the voltage source. The circuit further includes a voltage divider disposed between the voltage source and the plurality of half-bridges.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: November 3, 2020
    Assignee: ABB Power Electronics Inc.
    Inventors: Sandeep Bala, Liming Liu, Jing Xu
  • Patent number: 10770896
    Abstract: Disclosed is a solid state power controller configured to supply electric power from an AC power supply to at least one load via at least one power distribution channel, the at least one power distribution channel comprising a primary solid state switching device and a secondary solid state solid state switching device connected in series. The solid state power controller includes a primary control terminal driver configured to supply a primary control voltage to the control terminal (G) of the primary solid state switching device with respect to a reference potential (R) and a secondary control terminal driver configured to supply a secondary control voltage to the control terminal (G) of the secondary solid state switching device.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: September 8, 2020
    Assignee: HS ELEKTRONIK SYSTEME GMBH
    Inventor: Markus Greither
  • Patent number: 10756617
    Abstract: A resonant converter, including: a primary side circuit including at least one set of primary side switches, where the primary side circuit is configured to receive an input voltage; a resonant network coupled to the primary side circuit; a transformer having a primary side winding and a secondary side winding, where the primary side winding is coupled to the resonant network; a secondary side circuit including at least one set of secondary side switches, where the secondary side circuit is coupled to the secondary side winding of the transformer; and a control block that controls the secondary side switches according to the input voltage, the output voltage and the current detection signal, so that the secondary side winding of the transformer is short-circuited during a preset time interval before operating state of the primary side switches changes.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: August 25, 2020
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Tao Wei, Hao Lu
  • Patent number: 10454458
    Abstract: A latch circuit includes first and second NAND circuits and first and second capacitive elements. The first NAND circuit has a first input node into which a first signal is input. The second NAND circuit has a first input node into which a second signal is input, a second input node which is connected to an output node of the first NAND circuit, and an output node which is connected to a second input node of the first NAND circuit. The first capacitive element has one end connected to the first input node of the first NAND circuit and has another end connected to the output node of the first NAND circuit. The second capacitive element has one end connected to the first input node of the second NAND circuit and has another end connected to the output node of the second NAND circuit.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: October 22, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventor: Masayuki Usuda
  • Patent number: 10305387
    Abstract: A single active bridge converter is provided. The single active bridge converter includes a transformer including a primary winding and a secondary winding, a primary side circuit electrically coupled to the primary winding and including an H bridge circuit, and a secondary side circuit electrically coupled to the secondary winding, the secondary side circuit including a switch configured to selectively short the transformer secondary winding.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: May 28, 2019
    Assignee: ABB Schweiz AG
    Inventors: Said Farouk Said El-Barbari, Simon Herbert Schramm
  • Patent number: 10243075
    Abstract: A method for semiconductor devices on a substrate includes using gate structures which serve as active gate structures in a MOSFET region, as dummy gate structures in a JFET region of the device. The dummy gate electrodes are used as masks and determine the spacing between gate regions and source/drain regions, the width of the gate regions, and the spacing between adjacent gate regions according to some embodiments, thereby forming an accurately dimensioned transistor channel.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: March 26, 2019
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Hua-Chou Tseng, Han-Chung Lin
  • Patent number: 10186976
    Abstract: A controller includes a first control circuit coupled to an input side of a power converter. The first control circuit includes a timing and delay circuit and a switch selection circuit. A second control circuit is coupled to an output side of the power converter. The second control circuit includes a valley detection circuit and a synchronous rectifier control circuit. A third control circuit is coupled to the input side of the power converter. The third control circuit is coupled to drive an auxiliary switch coupled to an input side of an energy transfer element. The first control circuit is coupled to alternately drive a main switch, which is coupled to the input side of the energy transfer element, and the auxiliary switch in response to a command signal to transfer energy from the input side to the output side of the energy transfer element to drive a load.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: January 22, 2019
    Assignee: Power Integrations, Inc.
    Inventor: Rajko Duvnjak
  • Patent number: 10177658
    Abstract: Described examples include a method of controlling a power converter including executing a plurality of cycles. Each cycle includes turning on a first switch during a first period, the first switch coupled between a power supply and an output inductance; turning on a second switch during a second period, the second switch coupled between an output inductance and ground; turning on a third switch at a first time during the second period, the third switch coupled between the power supply and an auxiliary inductance; and turning on a fourth switch on at a third time after the second time, the fourth switch coupled the auxiliary inductance and ground. The second period ends at a third time period after the first time based on a later of an overlap time and a current through a switch connected to the second switch current handling terminal exceeding a threshold current.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: January 8, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Thomas Matthew LaBella, Michael G. Amaro, Jeffrey Anthony Morroni
  • Patent number: 9998179
    Abstract: The present invention provides a power supply for an inductive power transfer (IPT) system, comprising a current-fed push-pull resonant converter comprising a parallel-tuned resonant tank and a pair of switches enabling selective shorting of the resonant tank; and a controller adapted to control a shorting period of the resonant converter by selectively operating the switches. Methods for controlling an IPT power supply are also disclosed. The power supply may be controlled to regulate the output of an IPT pick-up inductively coupled with the power supply in use, or to operate at a zero voltage switching (ZVS) frequency.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: June 12, 2018
    Assignee: AUCKLAND UNISERVICES LIMITED
    Inventors: David Budgett, Aiguo Hu, Bob Wang
  • Patent number: 9906148
    Abstract: In order to enable a switching process with a zero-voltage sequence (ZVS) in a full bridge DC/DC converter (1) with phase shift control without having to provide an additional inductor for this purpose, it is provided that a short-circuit is generated in the secondary-side output rectifier (5) in the transition phase from the active to the passive phase prior to switching to a passive phase of the full bridge (2), said short-cut increasing the primary current (ip) across the primary side of the transformer (T) by means of the resulting short-circuit current (ik) across the secondary side of the transformer.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: February 27, 2018
    Assignee: FRONIUS INTERNATIONAL GmbH
    Inventors: Allan Sanchez, Josef Moeseneder, Andreas Ehrengruber
  • Patent number: 9866117
    Abstract: A power supply circuit includes a pre-regulator configured to receive an input voltage and to generate an output voltage, and a switching current regulator coupled to an output of the pre-regulator and configured to regulate a level of current supplied to an output load. The switching current regulator is controlled by a switching signal having a duty cycle. The circuit further includes a controller that generates the switching signal. The controller monitors the duty cycle of the switching signal and controls a level of the output voltage generated by the pre-regulator by providing a control signal in response to the duty cycle of the switching signal.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: January 9, 2018
    Assignee: CREE, INC.
    Inventors: Yuequan Hu, Daniel Pope
  • Patent number: 9780693
    Abstract: A resonant inverter includes first and second switches, first and second capacitive elements, a first coil, a second coil, a third coil, and a third capacitive element. The first and second switches are alternately turned on and off. The first and second capacitive elements are connected in parallel to the first switch and the second switch, respectively. The first coil is disposed between the first switch and an input voltage terminal. The second coil is disposed between the second switch and the input voltage terminal. The third coil and a third capacitive element are connected in series to each other and connected in parallel to a series circuit of the first and second coils. The first and second capacitive elements and the first and second coils constitute a plurality of first resonant circuits. The third coil and the third capacitive element constitute a single second resonant circuit.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: October 3, 2017
    Assignee: TDK Corporation
    Inventor: Katsunori Imai
  • Patent number: 9768704
    Abstract: A hybrid transformer is provided that includes an electromagnetic transformer and an AC-AC converter with a DC bridge. The AC-AC converter is operable to keep the input voltage and current of the hybrid transformer substantially in phase and to reduce fluctuation in the output voltage of the hybrid transformer in the event of an increase or decrease in the input voltage.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: September 19, 2017
    Assignee: ABB Research Ltd.
    Inventors: Mohamed Y. Haj-Maharsi, Le Tang, Rafael Gutierrez, Sandeep Bala
  • Patent number: 9755504
    Abstract: A flux converter for converting an input-side alternating current into an output-side DC current, wherein a power factor correction is provided and the flux converter comprises a transformer having at least two serially arranged primary windings and a secondary winding wound in same direction. In addition, a first switch is used to switch a storage capacitor in series with a first primary winding to the alternating current in a clocked manner via rectification elements and a second primary winding can be switched to the storage capacitor in a clocked manner by a second switch.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: September 5, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventor: Christian Augesky
  • Patent number: 9680387
    Abstract: A switched mode power supply comprising a switched mode converter and a controller for controlling the switched mode converter, the switched mode converter being provided for converting an input voltage to an output voltage and including, on a primary side, a primary winding and a controllable switch based circuitry connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding coupled to the primary winding and a capacitive element connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: June 13, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Magnus Karlsson, Oscar Persson, Fredrik Wahledow
  • Patent number: 9531260
    Abstract: An apparatus and a method for generating a pulse width modulated, PWM, voltage doubler signal is presented The apparatus comprises a voltage source, a capacitor, an output node, a switchable circuit assembly for connecting the voltage source, the capacitor and the output node, and a controller for the switchable circuit assembly which is adapted to be switchable between a first circuit configuration in which the capacitor is connected in parallel to the voltage source so as to be chargeable by the voltage source, and a second circuit configuration in which the capacitor is connected in series between the voltage source and the output node, and wherein the control means is adapted to control the switchable circuit assembly to switch to the first circuit configuration in the first period, and to switch to the second circuit configuration in the second period.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: December 27, 2016
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Horst Knoedgen, Gary Hague
  • Patent number: 9504143
    Abstract: An electrical circuit includes a first circuit part and a second circuit part. A first electrical potential is applicable to the first circuit part, wherein a second electrical potential is applicable to the second circuit part. The two circuit parts are galvanically isolated from each other by an insulator, wherein the insulator includes a conducting portion. This conducting portion can be safely sensed by an additional circuitry, to detect if a full or partial contact to the first electrical potential or the second electrical potential has occurred due to a voltage shift or a current flow on the conducting portion, which is itself insulated. This sensing circuitry can incorporate protection elements to clamp voltages and limit currents to prevent destruction of connected circuitries in case of a fail of the insulation.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: November 22, 2016
    Assignee: Infineon Technologies AG
    Inventors: Wolfgang Scherr, Volker Strutz
  • Patent number: 9379628
    Abstract: A resonant converter includes a primary switching circuit having a primary winding and a primary switching stage configured to drive the primary winding; a secondary resonant circuit having a secondary winding magnetically coupled to the primary winding, a resonance capacitor connected in parallel to the secondary winding, and first and second secondary inductors respectively coupled between an output terminal of the converter and respective terminals of the resonance capacitor; a rectification stage connected in parallel with the resonance capacitor, and having first and second switches coupled to form a half-bridge; and a feedback command circuit. The command circuit is configured to receive feedback signals representing an output voltage and an output current at the output terminal of the resonant converter, receive voltages at the terminals of the resonance capacitor, and turn on/off, independently with respect to each other, the switches of the rectification stage and the primary switching stage.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: June 28, 2016
    Assignee: STMicroelectronics S.r.l.
    Inventors: Osvaldo Enrico Zambetti, Stefano Saggini
  • Patent number: 9310821
    Abstract: An apparatus for obtaining information enabling a characteristic like determination of maximum power point of a power source, the apparatus including at least an inductor and a capacitor, the information enabling the determination of the characteristic of the power source being obtained by monitoring the voltage charge of the capacitor, and a mechanism discharging the capacitor through the inductor prior to the monitoring of the charge of the capacitor.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: April 12, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Gustavo Buiatti
  • Patent number: 9270196
    Abstract: A driver circuit for powering a load is disclosed. The driver circuit includes a self-oscillating half-bridge circuit, a resonant driver in electrical communication with the self-oscillating half-bridge circuit, and a DC voltage supply in electrical communication with the resonant driver. The self-oscillating half-bridge circuit is configured to generate a high-frequency AC signal. The resonant driver is configured to limit a current of the high-frequency AC signal and produce a limited output voltage based on the high-frequency AC signal. The DC voltage supply is configured to rectify the limited output voltage into a DC output voltage including a substantially constant current for powering the load.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: February 23, 2016
    Assignee: TECHNICAL CONSUMER PRODUCTS, INC.
    Inventors: Timothy Chen, Daniel A. Haas
  • Patent number: 9112407
    Abstract: A quasi-resonant device for a switching power, a quasi-resonant system for a switching power, and a method for a quasi-resonant control of a switching power are provided. The quasi-resonant device includes: a degaussing time sampling module, configured to sample a degaussing time Tds of a secondary coil of the transformer according to a feedback signal output by the switching power after the switching tube is turned off; a valley sampling module, configured to sample a resonant valley signal of the quasi-resonant module according to the feedback signal; a time producing module, configured to produce a time T with a predetermined ratio D by processing the degaussing time Tds; and a logic processing module, configured to obtain a first valley signal after the time T, and the first valley signal works as a switching signal T? to turn on the switching tube.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: August 18, 2015
    Assignees: Shenzhen BYD Auto R&D Company Limited, BYD Company Limited
    Inventors: Yongjun Hou, Xiaohua Yang
  • Patent number: 9054618
    Abstract: A power supply circuit can be used to provide an alternating-current supply voltage to an electric motor. The power supply circuit is supplied by line power. The power supply circuit includes a inverter including at least one pair of transistor for generating a corresponding phase of the plurality of power supply phases. The inverter includes a transistor control circuit for switching the low-side transistor to its conducting state and the high-side transistor to its non-conducting state in case an excess voltage is detected at the input of the inverter.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: June 9, 2015
    Assignee: Infineon Technologies Austria AG
    Inventors: Wolfgang Frank, Remigiusz Viktor Boguszewicz, Dirk Priefert
  • Patent number: 9055635
    Abstract: Disclosed are light-emitting diode (LED) driver circuits, methods, and a switch mode power supply. In one embodiment, an LED driver can include: (i) a silicon-controlled rectifier (SCR) and a rectifier bridge configured to receive an AC voltage, and to generate a phase-loss half sine wave voltage signal; (ii) a threshold voltage control circuit configured to receive a threshold voltage and an input voltage signal that represents the phase-loss half sine wave voltage signal, and to determine whether to output the threshold voltage based on angle information of the input voltage signal; (iii) a first control circuit configured to compare the input voltage signal against the threshold voltage output by the threshold voltage control circuit, and to generate a first control signal; and (iv) a power switch controllable by the first control signal to be off until an absolute value of the AC voltage is reduced to zero.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: June 9, 2015
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Feng Yu, Xiaodong Huang
  • Patent number: 9036369
    Abstract: Methods and apparatuses for programming a parameter value in an IC (e.g., any power electronic device, such as a controller of a power converter) are disclosed. The parameter can be selected/programmed by selecting a clamp using an external optional (selectively inserted) diode coupled to a multi-function programming terminal. In particular, a controller IC for a power converter can be externally programmed via one or more multiple function terminals during startup of the converter to select between two or more options using the external programming terminal(s). Once programming is complete, internal programming circuitry may be decoupled from the programming terminal and during normal operation the programming terminal may then be used for another function, such as a bypass (BP) terminal to provide a supply voltage to the IC or other required functionalities.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: May 19, 2015
    Assignee: Power Integrations, Inc.
    Inventors: Robert Mayell, Yury Gaknoki, Mingming Mao
  • Patent number: 8958221
    Abstract: A grid tied inverter connectable to an electricity grid having a DC to DC current fed push-pull inverter to generate a current waveform from a DC voltage source. The push-pull inverter includes a transformer having a first side winding connectable to a battery and a second side winding connectable to the grid. The first end of the second side winding is connected between two diodes connected in series between a positive and negative output rail and being oriented in the same direction. The second end of the second side winding is connected between two capacitors connected in series between the positive and negative output rail. A further winding is connected at one end between the two capacitors and at its other end between another two diodes connected in series between the positive and negative output rail.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: February 17, 2015
    Assignee: Sony Corporation
    Inventor: Joseph John Nathaniel Adam
  • Patent number: 8923016
    Abstract: A solar module has a solar cell which generates a DC voltage. The module has a converter for converting a DC voltage fed into its input. The module contains a semiconductor switch and a controller which drives a switching input of the semiconductor switch. The controller drives the semiconductor switch variably so that the semiconductor switch switches more slowly during the transition operation than during normal operation, thereby reducing a dynamic overvoltage on the switch such that the voltage present on the switch does not exceed the blocking voltage of the switch.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: December 30, 2014
    Inventors: Rainer Weiss, Peter Beckedahl, Ingo Staudt
  • Publication number: 20140362616
    Abstract: A dual resonance circuit is formed of two transformers, two resonance inductors and two resonance capacitors for a resonance type switching power supply employing parallel connected transformers. The secondary winding of the transformer is configured in a center tap structure, and a top and bottom symmetrical voltage multiplying rectifier is connected to the secondary winding coupled with the parallel connected transformers, thereby obtaining the same effect as when one transformer is used. The present invention achieves a low loss in the typical resonance type half bridge power supply even though two transformers are employed, and the switching power supply with a lowered height and thinned structure can be provided with the aid of the optimized arrangements of the resonance devices. The internal power loss can be lowered by using two parallel connected transformers as compared to a resonance type switching power supply which employs one transformer.
    Type: Application
    Filed: June 17, 2013
    Publication date: December 11, 2014
    Inventor: Tae-Young AN
  • Patent number: 8885366
    Abstract: A method for operating the DC-to-DC voltage regulator including plural active switches and plural inductors is disclosed. The method including the steps of: turning on the first active switch, and then turning off the first active switch when the current flowing in the first inductor is equal to zero; turning on the third active switch, and then turning off the third active switch when the current flowing in the second inductor is equal to zero; turning on the second active switch, and then turning off the second active switch when the current flowing in the first inductor is equal to zero; and turning on the fourth active switch, and then turning off the fourth active switch when the current flowing in the second inductor is equal to zero.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: November 11, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Ming-Hung Yu, Yung-Fu Huang, Min-Ju Hsieh
  • Patent number: 8878456
    Abstract: A filter device (10) for filtering high-frequency interferences, such as due to switching flanks of a DC converter, has a current path (4) between an input (2) and an output (3), and an inductor (L) in the current path (4), wherein the inductor (L) is disposed in the current path (4) as a first component and is connected to the input (2), and wherein a reverse polarity protective diode (D) is disposed in series with the inductor (L) downstream thereto.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: November 4, 2014
    Assignee: Continental Automotive GmbH
    Inventors: Stefan Holzinger, Christian Stöger
  • Patent number: 8855558
    Abstract: An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating characteristics based upon information received from the remote device. Further, the ballast may provide a path for the remote device to communicate with device other than the adaptive inductive ballast.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: October 7, 2014
    Assignee: Access Business Group International LLC
    Inventor: David W. Baarman
  • Patent number: 8831513
    Abstract: An adaptive inductive ballast is provided with the capability to communicate with a remote device powered by the ballast. To improve the operation of the ballast, the ballast changes its operating characteristics based upon information received from the remote device. Further, the ballast may provide a path for the remote device to communicate with device other than the adaptive inductive ballast.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: September 9, 2014
    Assignee: Access Business Group International LLC
    Inventor: David W. Baarman
  • Patent number: 8817498
    Abstract: A DC to DC converter system, includes inverter circuitry having a first and a second switch, the inverter circuitry further configured to generate a first and a second gate control signal, the signals configured to open and close the first and second switch, respectively, and generate an AC signal from a DC input signal. The system further includes transformer circuitry configured to transform the AC signal into a sinusoidal AC signal, second stage circuitry configured to rectify the sinusoidal AC signal to a DC output signal, and hybrid control circuitry configured to modulate the first and second gate control signals, wherein the modulation comprises pulse frequency modulation (PFM) and pulse width modulation (PWM).
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: August 26, 2014
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Hangseok Choi
  • Patent number: 8787044
    Abstract: An energy recovery snubber circuit for use in switching power converters. The power converters may include a switch network coupled to a primary winding of an isolation transformer, and rectification circuitry coupled to a secondary winding of the isolation transformer. The energy recovery snubber circuit may include clamping circuitry that is operative to clamp voltage spikes and/or ringing at the rectification circuitry. The clamped voltages may be captured by an energy capture module, such as a capacitor. Further, the energy recovery snubber circuitry may include control circuitry operative to return the energy captured by the energy capture module to the input of the power converter. To maintain electrical isolation between a primary side and a secondary side of the isolation transformer, a second isolation transformer may be provided to return the captured energy back to the input of the power converter.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: July 22, 2014
    Assignee: Flextronics AP, LLC
    Inventors: Zaohong Yang, Paul Garrity
  • Publication number: 20140167661
    Abstract: This disclosure relates to a power conversion system to power a variable impedance load with a variable power source, the power conversion system comprising a power converter including input terminals adapted to receive variable power from the variable power source and output terminals providing a converted power to the variable impedance load based on the variable power received at the input terminals. The power converter increases the input voltage to an output voltage. The power converter is configured to reflect a source impedance of the variable power source to the variable impedance load.
    Type: Application
    Filed: February 21, 2014
    Publication date: June 19, 2014
    Inventor: Lyon van der Merwe
  • Patent number: 8743567
    Abstract: A voltage converter (10) comprises an input (11) for receiving an input voltage (VIN), a first output (12) for providing a first output voltage (VPOS) and a second output (13) for providing a second output voltage (VNEG). The first output voltage (VPOS) and the second output voltage (VNEG) have opposite polarities. A switching arrangement (14) of the voltage converter (10) is designed to provide energy to an inductor (15) in a charging phase (A) of operation and to provide energy from the inductor (15) to the first output (12) and, via a flying capacitor (16), to the second output (13) in a discharging phase of operation. The first duration (t1) of the charging phase (A) of operation is controlled such that the difference between a first predetermined value and the sum of the absolute value of the first output voltage (VPOS) and of the second output voltage (VNEG) is minimized.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: June 3, 2014
    Assignee: AMS AG
    Inventor: Pramod Singnurkar
  • Patent number: 8724348
    Abstract: A power-supply unit including a transformer, a full bridge circuit having four arm switches on a primary side of the transformer, a rectifier and smoothing circuit including two synchronous rectifier switches on a secondary side of the transformer, a choke coil, and a capacitor, an output terminal in the rectifier and smoothing circuit, a control circuit controlling ON/OFF of the four arm switches of the full bridge circuit and the two synchronous rectifier switches of the rectifier and smoothing circuit, a resonant inductor including a leakage inductor component and a parasitic inductor component on the primary side of the transformer, and a resonant capacitor, and in which the control circuit includes a timing variable unit which varies switching timings of the two synchronous rectifier switches of the rectifier and smoothing circuit based on an output current flowing in the output terminal provided in the rectifier and smoothing circuit.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: May 13, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Sase, Akihiko Kanouda, Yosuke Tsuyuki
  • Patent number: 8711580
    Abstract: A resonant conversion system is provided, in which a resonant converter receives an input voltage to generate an output voltage, and a buck converter provides the input voltage of the resonant converter, and controls the input voltage to perform an over-current protection process.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: April 29, 2014
    Assignee: Delta Electronics, Inc.
    Inventors: Jinfa Zhang, Lei Cai, Jiaojun Sun, Guodong Yin
  • Patent number: 8699237
    Abstract: An inverter with soft switching is used for a high step-up ratio and a high conversion efficiency. The inverter includes an isolation voltage-quadrupling DC converter and an AC selecting switch. The isolation voltage-quadrupling DC converter includes an active clamping circuit. By a front-stage converter circuit, a continuous half-sine-wave current is generated. By a rear-stage AC selecting switch, the half-sine-wave current is turned into a sine-wave current. Thus, electricity may be supplied to an AC load or the grid. The circuit is protected by isolating the low-voltage side from the high-voltage side. The conversion efficiency is high. The leakage inductance is low. The switch stress is low. The inverter is durable and reliable. Hence, the inverter is suitable for use in a photovoltaic system to increase the total conversion efficiency.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: April 15, 2014
    Assignee: National Tsing Hua University
    Inventors: Ching-Tsai Pan, Ming-Chieh Cheng, Yu-Chuan Wang, En-Lin Chen
  • Patent number: 8659916
    Abstract: A control circuit for a resonant power converter and a control method thereof are disclosed. The control circuit comprises a first transistor and a second transistor switching a transformer through a resonant tank. A controller receives a feedback signal for generating a first switching signal and a second switching signal coupled to drive the first transistor and the second transistor respectively. The feedback signal is correlated to an output of the resonant power converter. A diode is coupled to the second transistor for detecting the state of the second transistor for the controller. The first switching signal and the second switching signal are modulated to achieve a zero voltage switching (ZVS) for the second transistor.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: February 25, 2014
    Assignee: System General Corp.
    Inventors: Ta-Yung Yang, Tien-Chi Lin
  • Patent number: 8654546
    Abstract: A control circuit of a resonant power converter is disclosed. The control circuit comprises a first transistor and a second transistor for switching a transformer and a resonant tank comprising a capacitor and an inductor. A controller is configured to receive a feedback signal correlated to the output of the power converter for generating a first switching signal and a second switching signal to drive the first transistor and the second transistor, respectively. A diode coupled to the first transistor and the resonant tank for detecting the state of the first transistor and generating a detection signal for the controller. The detection signal indicates if the transistors are in a zero voltage switching (ZVS) state. If the transistors are not in the ZVS state, the switching frequency of the transistors will be increased.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: February 18, 2014
    Assignee: System General Corp.
    Inventors: Tien-Chi Lin, Hang-Seok Choi, Ta-Yung Yang
  • Publication number: 20140043863
    Abstract: A method of controlling a switching mode power converter enables zero voltage switching by forcing a voltage across the main switch to zero. This is accomplished by sensing when a current on the secondary side of the power converter drops to zero, or other threshold value, and then generating a negative current through the secondary winding in response. The negative secondary current results in a corresponding discharge current in the primary winding, which reduces the voltage across the main switch. The voltage across the main switch is monitored such that when the voltage reaches zero, or other threshold value, the main switch is turned ON. In this manner, the circuit functions as a bi-directional current circuit where a forward current delivers energy to a load and a reverse current provides control for reducing the voltage across the main switch to enable zero voltage switching.
    Type: Application
    Filed: August 13, 2012
    Publication date: February 13, 2014
    Applicant: FLEXTRONICS AP, LLC
    Inventors: Mark Telefus, Wei Li
  • Patent number: 8634214
    Abstract: A current resonance power supply includes a transformer having a primary winding and a secondary winding, two switching elements connected to one end of the primary winding of the transformer and arranged in series, a resonance capacitor connected to the other end of the primary winding, and a voltage detection unit connected between the one end of the primary winding and the two switching elements and configured to detect that AC voltage input to a primary side of the transformer becomes lower, wherein operations of the switching elements are controlled based on a detection result of the voltage detection unit.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: January 21, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keisuke Samejima
  • Patent number: 8625310
    Abstract: A power supply apparatus includes an AC-DC rectifier, a transformer, a feedback inductor, a resonant unit, and a primary and auxiliary switch. The AC-DC rectifier rectifies an input voltage. The transformer includes a primary coil having a first primary coil and an isolated second primary coil, and transforms a first voltage of the primary coil into a second voltage of the secondary coil. The feedback inductor is connected to a tap between the first primary coil and second primary coil and an output of the AC-DC rectifier. The resonance unit is connected in parallel with the secondary coil and is configured to output an output voltage by rectifying the second voltage provided from the secondary coil. The primary switch and secondary switch are connected in parallel between the transformer and AC-DC rectifier.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: January 7, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hyeon-Yong Jang
  • Patent number: 8593836
    Abstract: A power converter includes a main switch to which a capacitor is connected through a sub-diode. A series connection of a primary coil of a transformer and a sub-switch is connected parallel to the capacitor. A main diode is coupled in series with the main switch. A series connection of a sub-diode and a secondary coil of the transformer is parallel to the main diode. The rate of a rise in voltage across the main switch when turned off is suppressed by the rate of charging of the capacitor. Subsequently, by turning on the sub-switch, the current flowing through the main diode to be delivered to the transformer, thereby causing the current flowing through the main switch when turned on to be decreased by the sub-inductor.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: November 26, 2013
    Assignee: Denso Corporation
    Inventor: Kazuhiro Umetani
  • Patent number: 8593835
    Abstract: The present invention relates to an oscillator that is capable of realizing duty balancing. The oscillator determines a switching frequency of a converter converting an input voltage according to a switching operation of switches to generate an output voltage. The oscillator determines a first half cycle of a duty signal determining the switching frequency by using a reference current according to a feedback signal corresponding to the output voltage. The oscillator senses a first half cycle period by using an output of the frequency setting unit, and determines the same period as the first half cycle as a second half cycle of the duty signal after the first half cycle.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: November 26, 2013
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Hyun-Chul Eom, Sung-Yun Park
  • Publication number: 20130223109
    Abstract: An electrical circuit as part of a reduced size power supply with improved use of electrical power can include an isolation circuit between an LC switching circuit and a load, a parallel LC energy storage circuit, and/or a dual LC switching circuit.
    Type: Application
    Filed: January 14, 2013
    Publication date: August 29, 2013
    Applicant: Moxtek, Inc.
    Inventor: Moxtek, Inc.