Having Transistorized Inverter Patents (Class 363/16)
  • Patent number: 9641071
    Abstract: Disclosed is a ?uk based current source, a control circuit for a ?uk based current source, and a method for providing a current.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: May 2, 2017
    Assignee: Infineon Technologies Austria AG
    Inventors: Andrea Logiudice, Giorgio Chiozzi
  • Patent number: 9627917
    Abstract: The present application discloses a device for wireless charging circuit, comprising: a primary circuit box, which comprises at least one first switch unit; a secondary circuit box, which comprises at least one second switch unit; a transmission plate, which comprises a primary inductor of a transformer and a primary compensation capacitor, the primary inductor being coupled in series with the primary compensation capacitor; a receiving plate, which comprises a secondary inductor of the transformer; the transmission plate and the receiving plate are magnetically coupled with each other; the transmission plate is coupled with the primary circuit box; and the receiving plate is coupled with the secondary circuit box. The voltage between external terminals of transmission plate and the voltage between external terminals of receiving plate can satisfy the safety requirement.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: April 18, 2017
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Chao Yan, Lizhi Xu, Xinlei Li
  • Patent number: 9621048
    Abstract: A switching power-supply circuit includes a second rectifying/smoothing circuit arranged to generate a second output voltage by rectifying and smoothing the output of a second secondary winding, and the second rectifying/smoothing circuit includes a second rectifier circuit and a capacitor, connected to the second secondary winding. A second switching control circuit operates in response to an alternating-current winding voltage occurring in the second secondary winding, and includes a time constant circuit causing a switch mechanism connected to the control terminal of a rectifier switch element to operate, and a second feedback circuit arranged to detect and feed back the second output voltage to the time constant circuit.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: April 11, 2017
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Tatsuya Hosotani, Satoshi Yamaguchi
  • Patent number: 9621065
    Abstract: An energy efficient apparatus includes a switching device, a frequency dependent reactive device, and a control element is provided. The switching device is coupled to a source of electrical power and includes a pair of transistors and is adapted to receive a control signal and to produce an alternating current power signal. The frequency of the alternating current power signal is responsive to the control signal. The frequency dependent reactive device is electrically coupled to the pair of transistors for receiving the alternating current power signal and producing an output power signal. The frequency dependent reactive device is chosen to achieve a desired voltage of the output power signal relative to the frequency of the alternating current power signal. The control element senses an actual voltage of the direct current power signal and modifies the control signal delivered to achieve the desired voltage of the direct current power signal.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: April 11, 2017
    Assignee: ADVANCED CHARGING TECHNOLOGIES, LLC
    Inventors: Michael H. Freeman, W. J. “Jim” Weaver, Jr., Mitchael C. Freeman, Robert Dieter, Brian Santee
  • Patent number: 9614375
    Abstract: Discussed are a power conversion apparatus and a photovoltaic module including the power conversion apparatus. The power conversion apparatus includes a converter unit to convert DC voltage from a solar cell module, the converter unit including a plurality of interleaving converters, and a controller to control the converter unit, wherein the controller changes switching periods of the interleaving converters and changes phase differences between the interleaving converters during operation sections of the interleaving converters, in response to a change of the switching periods of the interleaving converters. Consequently, it is possible to prevent instantaneous reduction of output power due to change of switching frequencies of the interleaving converters.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: April 4, 2017
    Assignee: LG Electronics Inc.
    Inventors: Younjong Kang, Myonghwan Kim, Myungsoo Ham, Kyungsoo Jung
  • Patent number: 9602017
    Abstract: A switching power source device according to one aspect of the present invention is a current-resonant DC-DC converter, and includes a control integrated circuit having an oscillation circuit that determines a switching frequency of switching elements and a burst control circuit that controls a burst operation in the standby mode, as well as an output voltage detecting unit connected to a secondary side of a transformer to detect an output voltage. The switching frequency of the switching element is determined by the oscillation circuit by the smaller of a first frequency control voltage generated from a voltage of an auxiliary coil disposed in the primary side of the transformer and a second frequency control voltage corresponding to the output voltage, and the burst control circuit generates the first frequency control voltage that gradually increases or decreases in accordance with the voltage of the auxiliary coil.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: March 21, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Jian Chen
  • Patent number: 9590492
    Abstract: In accordance with an embodiment, a method of operating a switched-mode power supply includes starting up the switched-mode power supply by applying a first switching signal to a control node of the first switching transistor and a second switching signal to a control node of a second switching transistor, where a duty cycle of the first switching signal is less than a duty cycle of the second switching signal. After starting up the switched mode power supply, the switched mode power supply is operated by applying a third switching signal to the control node of the first switching transistor and a fourth switching signal to the control node of the second switching transistor, where a duty cycle of the third switching signal is substantially equal to a duty cycle of the fourth switching signal.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: March 7, 2017
    Assignee: Infineon Technologies Austria AG
    Inventors: Chia Jui Chang, Jheng Bin Huang, Jin Hung Lin
  • Patent number: 9572224
    Abstract: Thermally protected bleeder circuits for maintaining an input current of a power converter above a dimmer circuit holding current are disclosed. In one example, a bleeder control circuit may generate a bleeder control signal to control a bleeder current of the bleeder circuit based on an input current signal and a temperature signal. The bleeder control circuit may cause the bleeder current to be substantially equal to zero in response to the input current signal being greater than or equal to a reference signal, and may cause the bleeder current to be proportional to a difference between the input current signal and the reference signal in response to the input current signal being less than the reference signal. The reference signal may be constant for temperatures less than a threshold temperature, but may decrease with respect to increases in temperature for temperatures greater than the threshold temperature.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: February 14, 2017
    Assignee: Power Integrations, Inc.
    Inventors: Yury Gaknoki, Mingming Mao, Tiziano Pastore, Ricardo Luis Janezic Pregitzer, Michael Yue Zhang
  • Patent number: 9548670
    Abstract: Methods and systems for calibrating an inductor-inductor-capacitor (LLC) resonant converter are provided herein. The method includes calculating input voltage mathematically as a function of at least one of an output voltage, a load current, and tolerances of components of the LLC resonant converter and operating the LLC resonant converter in an open loop mode at a nominal resonant frequency. The method also includes measuring output voltage of the LLC resonant converter and comparing the measured output voltage to the calculated input voltage.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: January 17, 2017
    Assignee: General Electric Company
    Inventors: Raghothama Reddy, Darwin Drake Smith
  • Patent number: 9548653
    Abstract: A method includes comparing, by a voltage-second (VS) controller, a first duty cycle used to control a first switch at a primary side of a power transformer of a DC-to-DC converter with a threshold. The method further includes if a value of the first duty cycle is less than the threshold, controlling, by the VS controller, a second duty cycle used to control a second switch at a secondary side of the power transformer, and maintaining a voltage level at an output voltage node at a non-zero value, and if the value of the first duty cycle is greater than the threshold, controlling, by an output voltage loop, the second duty cycle based on the first duty cycle, and monotonically increasing the voltage level the at the output voltage node from the non-zero value to a predetermined value.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: January 17, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Frank Tang, Kening Gao, Sheng Lin, Danyang Zhu
  • Patent number: 9543842
    Abstract: The present invention relates to a converter for transferring power between a first DC system of DC voltage V1 and a second DC system of DC voltage V2, the converter comprising: —a first AC/DC converter for transforming DC voltage V1 into a first single phase AC voltage V1ac, of frequency ?, root mean square line-neutral magnitude V1acm and angle ?1; a second AC/DC converter for transforming DC voltage V2 into a second single phase AC voltage V2ac, of frequency ?, root mean square line-neutral magnitude V2acm and angle ?2; and two inductors L1, L2 and a capacitor C, wherein the first terminals of the inductors and capacitor are connected together, the second terminal of inductor L1 and the second terminal of the capacitor C are connected to the first AC voltage V1ac, and the second terminal of inductor L2 and the second terminal of the capacitor C are connected to the second AC voltage V2ac; wherein the value of the capacitor C, inductor L1 and inductor L2 are selected to enable required power transfer and to
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: January 10, 2017
    Assignee: University Court of The University of Aberdeen
    Inventor: Dragan Jovcic
  • Patent number: 9537395
    Abstract: A peak efficiency detection system may include a switched power supply (SPS) module providing an output supply signal. The SPS module may have an internal node, and a plurality of SPS circuits configured to generate the output supply signal on the internal node. A dead type module may generate control signals. A central node external to the SPS module may deliver the output supply signal to a load module. A power stage size control module may generate control signals for controlling the SPS module. A peak-efficiency detection (PED) module may receive the output supply signal from the central node, the control signals from the SPS module, and the control signals from the power stage size control module. The PED module may generate a signal representative of an efficiency of the SPS module.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: January 3, 2017
    Assignee: STMicroelectronics International N.V.
    Inventor: Vratislav Michal
  • Patent number: 9537388
    Abstract: A hybrid distribution transformer is provided that includes an electromagnetic transformer and a voltage source converter that is operable to reduce fluctuation in the output voltage of the hybrid distribution transformer in the event of an increase or decrease in the input voltage.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: January 3, 2017
    Assignee: ABB Research Ltd.
    Inventors: Mohamed Y. Haj-Maharsi, Sandeep Bala, Le Tang
  • Patent number: 9532487
    Abstract: A system for cooling air includes an air cooling apparatus that includes an intermediate ducted section with two movable dampers separated by a divider containing a heat exchange element. The heat exchange element can be situated parallel to a direction of airflow in the air cooling apparatus, such that opening both dampers can cause a flow of air to bypass the apparatus and closing both dampers can force the air to pass through the heat exchange element.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: December 27, 2016
    Assignee: Amazon Technologies, Inc.
    Inventor: Alan Joseph Lachapelle
  • Patent number: 9515573
    Abstract: An inverting apparatus and a control method thereof are provided. The inverting apparatus includes an inverting circuit, a capacitor, and a control circuit. The inverting circuit receives a DC input power and is configured to convert the DC input power into an AC output power, wherein an AC output current of the AC output power is preset to a preset output current. The capacitor is connected to an output terminal of the inverting circuit. The control circuit is coupled to the inverting circuit and is configured to control a power conversion of the inverting circuit, wherein the control circuit superimposes a preset capacitor compensation current of which the phase leads to the preset output current on the preset output current, so as to control the inverting circuit to adjust the AC output current and provide the adjusted AC output current to a power grid.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: December 6, 2016
    Assignee: FSP TECHNOLOGY INC.
    Inventors: Han-Wei Chen, Chun-Hao Yu, Chia-Hua Liu
  • Patent number: 9509218
    Abstract: A DC to DC converter assembly, for connecting first and second high voltage DC power transmission networks, comprising first and second modular multilevel converters, each converter including a first converter limb having first and second limb portions, each limb portion including a least one module switchable to selectively provide a voltage source and thereby vary the magnitude ratio of a DC voltage (V1, V2) across the first and second terminals of a respective converter and an AC voltage (VAC) at the third terminal of the corresponding converter, the DC to DC converter assembly further including a first link electrically connecting the third terminal of one converter, with the third terminal of the other converter, and at least one converter further including a controller configured to switch the first and second limb portions in the first converter limb of the said converter into simultaneous conduction to divert a portion (IDiV1) of current flowing within the said converter away from the first link.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: November 29, 2016
    Assignee: Alstom Technology Ltd.
    Inventors: David Reginald Trainer, Nnamdi Okaeme
  • Patent number: 9484773
    Abstract: An energy harvesting apparatus includes: a capacitor configured to store energy generated by an energy harvesting element; and a switch connected to the capacitor and configured to switch energy supply from the capacitor to a load based on a capacitor voltage with which the capacitor is charged. An energy harvesting system includes: energy harvesting elements; energy harvesting apparatuses which are provided to respectively correspond to the energy harvesting elements; and a load as an energy supply destination connected to the energy harvesting apparatuses.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: November 1, 2016
    Assignee: ROHM CO., LTD.
    Inventors: Koichi Miyanaga, Jun Maede
  • Patent number: 9473045
    Abstract: A soft-switching and low input current ripple power inversion circuit, in which the inversion circuit is connected in parallel to an input DC voltage source and includes a top cell, a bottom cell and at least one transformer, in which the top cell and the bottom cell have its individual impedance adjusting unit of which the impedance can easily be adjusted to obtain the required equivalent resonant inductance or capacitance. Thus, the semiconducting switches therein can be soft-switched alternately to reduce the switching loss. Moreover, the inversion circuit can be modified by adding at least one middle cell inserted between the top cell and the bottom cell to reduce the voltage stress on the semiconductor switch. Consequently, low voltage rating semiconductor switch accompanied with lower RDS(on), conduction losses can be reduced to improve the converter efficiency.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: October 18, 2016
    Assignee: NATIONAL TAIWAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventor: Ching-Shan Leu
  • Patent number: 9473034
    Abstract: Disclosed are an isolated power converter and a switching control signal using the same. In the isolated power converter, the positions of the power switch and the primary winding are exchanged, and the feedback voltage detection and secondary current zero-crossing detection are carried out in accordance with the voltage across the primary winding. Thus, primary side control can still be implemented without employment of an auxiliary winding.
    Type: Grant
    Filed: January 20, 2015
    Date of Patent: October 18, 2016
    Assignee: Silergy Semiconductor Technology (Hangzhou) Ltd.
    Inventors: Qiukai Huang, Zhiliang Hu, Xinlei Li
  • Patent number: 9456474
    Abstract: A biasing and driving circuit for an electric load, having an input adapted to receive an a.c. input voltage and an output adapted to supply a d.c. output voltage, comprising: a voltage-regulator device, having a feedback input terminal configured to receive a sensing voltage that is a function of a supply current that flows through the electric load and regulating, on the basis of the sensing voltage received, the supply current; a resistive sensing element, operatively coupled to the feedback input, configured to receive the supply current and generate the sensing voltage as a function of the supply current; a resistor coupled to the feedback input; and an auxiliary biasing circuit adapted to receive the a.c. input voltage and inject through the resistor an a.c. auxiliary biasing current that varies in a way inversely proportional to the input voltage.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: September 27, 2016
    Assignee: STMICROELECTRONICS S.R.L.
    Inventors: Fulvio Ottavio Lissoni, Domenico Attianese, Stefano Signoria
  • Patent number: 9444249
    Abstract: A semiconductor driving device includes a negative surge detection circuit and a level shifter circuit. The negative surge detection circuit detects whether the negative surge occurs at a connection point between a P-side SW element and N-side SW element. The level shifter circuit maintains a driving voltage used in driving the P-side SW element upon the negative surge detection circuit detecting occurrence of the negative surge.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: September 13, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Motoki Imanishi, Kenji Sakai, Takaki Nakashima
  • Patent number: 9436198
    Abstract: A method and apparatus for converting a first power to a second power. In one embodiment the apparatus comprises a power conversion circuit for receiving the first power; and a controller, coupled to the power conversion circuit, for dynamically selecting between a non-interleaved mode and an interleaved mode for operating the power conversion circuit to convert the first power to the second power.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: September 6, 2016
    Assignee: Enphase Energy, Inc.
    Inventor: Martin Fornage
  • Patent number: 9438124
    Abstract: A power supply circuit includes a plurality of output terminals that output voltages (voltages may have the same or different voltage values among the output terminals), and a transformer that has a plurality of output windings. First and second output windings of the plurality of output windings are coupled to each other. The first and second output windings have the same number of turns. First terminals, which have a first polarity, of the first and second output windings are connected to each other via a capacitor. Further, second terminals, which have a second polarity opposite to the first polarity, of the first and second output windings are electrically connected to each other. The second terminals of the first and second output windings may be directly connected to each other.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: September 6, 2016
    Assignee: TDK Corporation
    Inventors: YueQing Wang, Honglei Wang
  • Patent number: 9431391
    Abstract: A semiconductor device having high breakdown withstand voltage includes a first element which is a normally-on type transistor made of nitride compound semiconductor, a second element which is connected to the first element in series and is a transistor having withstand voltage between a source and a drain lower than withstand voltage of the first element, a first diode which is connected between a gate of the first element or a gate of the second element and a drain of the first element so that a cathode of the first diode is connected at the drain's side and has predetermined avalanche withstand voltage, and a first resistance connected to the gate to which the first diode is connected. The avalanche withstand voltage of the first diode is lower than breakdown voltage of the first element.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: August 30, 2016
    Assignees: Furukawa Electric Co., Ltd., Fuji Electric Co., Ltd.
    Inventor: Katsunori Ueno
  • Patent number: 9423433
    Abstract: An RF electronics module includes a grounding plate, a non-conductive substrate, a number of conductive vias, RF PA circuitry, and RF power detection circuitry. The non-conductive substrate is over the grounding plate. The conductive vias extend parallel to one another from a surface of the non-conductive substrate opposite the grounding plate through the non-conductive substrate to the grounding plate. The RF PA circuitry is coupled to the grounding plate through a first one of the conductive vias. The RF power detection circuitry is coupled to a second one of the conductive vias and configured to measure a signal induced in the second one of the conductive vias due to electromagnetic coupling with the first one of conductive vias. The first one of the conductive vias is adjacent to the second one of the conductive vias.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: August 23, 2016
    Assignee: Qorvo US, Inc.
    Inventors: Douglas Andrew Teeter, Ming Ji, Praveen Varma Nadimpalli
  • Patent number: 9425694
    Abstract: A current resonance type DC-DC converter includes a transformer that has a primary winding and a secondary winding, a switching circuit that has a pair of first switching elements and that is connected to the primary winding, an AC/DC transfer circuit that has four rectifying devices, which are connected in full bridge and include a pair of second switching elements, that is connected to the secondary winding, that converts an AC voltage, which is induced at the secondary winding, into a DC voltage and that outputs the DC voltage, and a control circuit that controls ON and OFF operations of the pairs of the first and second switching elements. The control circuit controls the ON and OFF operations so as to synchronize the pair of the first switching elements with the pair of the second switching elements.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: August 23, 2016
    Assignee: TDK Corporation
    Inventors: Ken Matsuura, Hiroshige Yanagi
  • Patent number: 9417679
    Abstract: Various computing devices and methods of managing the power consumption thereby are disclosed. In one aspect, a method of managing power consumption of a computing device that has a battery is provided. The method includes cycling the computing device between a connected standby active state and a connected standby idle state. The duration of the connected standby idle state is set based at least in part on a charge level of the battery.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: August 16, 2016
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Greg Sadowski, Alexander J. Branover, Maurice B. Steinman
  • Patent number: 9419511
    Abstract: In one embodiment, a method of controlling a capacitor discharge for a switching power supply, can include: (i) generating a first voltage signal from a voltage at an X capacitor that is coupled between input terminals of the switching power supply; (ii) activating a detection signal in response to the first voltage signal being inactive for a duration of a predetermined time interval, where the detection signal being activated indicates a cut-off of the input terminals; and (iii) at least partially discharging the X capacitor after the cut-off and in response to activation of the detection signal.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: August 16, 2016
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Qiukai Huang, Yunlong Han, Xiaoru Xu
  • Patent number: 9401648
    Abstract: A power converter having a current limit module and a method for controlling the power converter. The power converter converts an input voltage to an output voltage based at least on driving a main switch to switch on and off and regulates the output voltage through regulating a duty cycle of the main switch. The current limit module is configured to compensate a first current limit threshold indicative of a maximum allowable value of a peak value of a switching current of the main switch with a threshold compensation signal indicative of the duty cycle to provide a second current limit threshold. The second current limit threshold is used to limit the maximum value of the peak value, so that a maximum allowable output power of the power converter is substantially uninfluenced by the variation in the duty cycle.
    Type: Grant
    Filed: June 28, 2014
    Date of Patent: July 26, 2016
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventor: Yike Li
  • Patent number: 9391535
    Abstract: Provided is a received power conversion device for a resonant wireless charging system, including a wireless power receiver for receiving wireless power from a wireless power transmission device, a rectifier for rectifying power in an Alternating Current (AC) form received in the wireless power receiver into a Direct Current (DC), a free-wheeling switching unit for switching according to a switching control signal to form a path for free-wheeling the power in the AC form, a feedback circuit fed back with an output signal of a corresponding power conversion device to detect a level of the output signal, and a controller for controlling switching of the free-wheeling switching unit according to the output level detected by the feedback circuit.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: July 12, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-Ku Yeo, Gyu-Hyeong Cho, Se-Ho Park, Se-Ki Kim, Young-Min Lee, Jun-Han Choi
  • Patent number: 9391524
    Abstract: The disclosed embodiments provide an AC/DC power converter that converts an AC input voltage into a DC output voltage. This AC/DC power converter includes an input rectifier stage which rectifies an AC input voltage into a first rectified voltage. The AC/DC power converter also includes a switching resonant stage which is directly coupled to the output of the input rectifier stage. The switching resonant stage converts the rectified voltage into a first high frequency AC voltage of a first amplitude. This AC/DC power converter additionally includes a transformer which is coupled to the output of the switching resonant stage and is configured to down-convert the first high frequency AC voltage into a second high frequency AC voltage of a second amplitude. Furthermore, the AC/DC power converter includes an output rectifier stage which is coupled to the output of the transformer, wherein the output rectifier stage rectifies the second high frequency AC voltage into a DC output voltage.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: July 12, 2016
    Assignee: Apple Inc.
    Inventors: InHwan Oh, Nicholas A. Sims
  • Patent number: 9391527
    Abstract: There is provided a power supply apparatus capable of precisely control a primary side switching frequency at a secondary side by receiving fed-back information regarding a power state at the secondary side without a separate expensive circuit or a complicated circuit. The power supply apparatus includes: a power supplying unit having a primary side and a secondary side having different ground electrical characteristics, switching power input to the primary side, and transferring the switched power to the second side electrically insulated from the primary side to supply the power; a controlling unit provided on the secondary side and receiving fed-back information regarding a power state of the power supplying unit to control a maximum value and a minimum value of a switching frequency of the primary side; and a transferring unit transferring a control signal from the controlling unit to the primary side of the power supplying unit.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: July 12, 2016
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Dae Hoon Han, Seo Hyung Kim, Joon Youp Sung, Jung Eui Park, Jung Sun Kwon, Jae Shin Lee
  • Patent number: 9374012
    Abstract: There is provided a power supply including a direct current (DC) to DC converter supplying main power to a load, and a sub converter connected to the DC to DC converter and reducing output loss, wherein the sub converter is operable based on a hold-up time.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: June 21, 2016
    Assignee: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Jae Kook Kim, Chong Eun Kim, Sung Ho Kim, Dong Kyun Ryu
  • Patent number: 9374002
    Abstract: The present invention related to a switch control circuit, a coupled inductor boost converter including the same, and a driving method thereof. The coupled inductor boost converter includes a first inductor connected between an input voltage and a first node, a second inductor connected between the first node and a second node, and a power switch connected between the first node and a ground, and a switch control circuit. The switch control circuit receives a voltage of the second node and turn on the power switch by using the voltage of the second node at a time when a voltage of the first node becomes a zero voltage.
    Type: Grant
    Filed: May 8, 2013
    Date of Patent: June 21, 2016
    Assignee: Fairchild Korea Semiconductor LTD
    Inventors: Jae-Yong Lee, Young Sik Lee, Young-Bae Park, Young-Je Lee, Eunsung Jang
  • Patent number: 9369053
    Abstract: In a power supply device, a primary winding of a transformer is connected in series to a main switching element, and is connected in parallel to a series circuit of a resonance capacitor and a sub switching element. A secondary winding of the transformer is connected in series to a series circuit of a rectifying element and a resonance inductor. The capacitance of the resonance capacitor and the inductance of the resonance inductor are each set such that, when the sub switching element is in an on state, the waveform of the voltage that is generated between the first main terminal and the second main terminal of the main switching element takes a protruding curve shape, the voltage being generated due to a resonance phenomenon of at least the resonance capacitor and the resonance inductor.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: June 14, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kiyoshi Ogasawara, Takafumi Fujino, Hiromichi Goto, Teruhito Takeda, Satohiko Hosomi, Kei Mitsuyasu, Katsuyuki Doi, Hideaki Abe
  • Patent number: 9369051
    Abstract: An interleaved forward voltage converter having a first inverter stage has a first transformer having a first secondary winding coupled to a filter inductor. A second converter stage has a second transformer having a second secondary winding coupled to the filter inductor. A diode is coupled between the first and second secondary windings to automatically connect the first and second secondary windings in series when a duty cycle of the converter exceeds 50%. An interleaved forward voltage converter can connect the two primary windings in either parallel or a series configuration. The two secondary windings can be connected in either parallel or a series configuration. Having the two primary windings in parallel and the two secondary windings in series allows the converter to operate with a lower input voltage. Having the two primary windings in series and the two secondary windings in a parallel configuration allows the converter to operate with a higher input voltage.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: June 14, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Isaac Cohen
  • Patent number: 9363856
    Abstract: The present invention relates to a driver device (10) for driving a load (18), in particular an LED (18) unit having one or more LEDs, comprising input terminals (14, 16) for connecting the driver device (10) to a voltage supply (12) and for receiving an input voltage (V10) from the voltage supply (12), an output terminal for connecting the driver device (10) to the load (18), an converter unit (24) for converting a drive voltage to an output (V20) voltage for powering the load (18), a switching unit (20, 22) connected to the input terminals (14, 16) for providing different voltage levels as the drive voltage to the converter unit (24), and a control unit (28) for controlling the switching unit (20, 22) on the basis of an electrical converter signal (V12; V13; I12; I13) measured at a member (30, 36) of the converter unit (24) and a reference signal (Vth) having an alternating component to provide an out put signal (V20) having an alternating signal component on the basis of the alternating component of the re
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: June 7, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Andrew Ulrich Rutgers, Reinhold Elferich
  • Patent number: 9362826
    Abstract: An apparatus for electric power conversion includes a converter having a regulating circuit and switching network. The regulating circuit has magnetic storage elements, and switches connected to the magnetic storage elements and controllable to switch between switching configurations. The regulating circuit maintains an average DC current through a magnetic storage element. The switching network includes charge storage elements connected to switches that are controllable to switch between plural switch configurations. In one configuration, the switches forms an arrangement of charge storage elements in which at least one charge storage element is charged using the magnetic storage element through the network input or output port. In another, the switches form an arrangement of charge storage elements in which an element discharges using the magnetic storage element through one of the input port and output port of the switching network.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: June 7, 2016
    Assignee: Arctic Sand Technologies, Inc.
    Inventor: David M. Giuliano
  • Patent number: 9356504
    Abstract: A switched-mode power supply is disclosed, which includes a transformer with a primary winding and a secondary winding. A switch is coupled in series with the primary winding and configured to repeatedly interrupt a current through the primary winding. An inductor is located differently with reference to magnetic fields that the primary and secondary windings are configured to induce. A connection exists between the inductor and a circuit that contains one of the primary and secondary windings. The connection is configured to connect from the inductor to the circuit a first voltage that has a waveform representative of and a polarity opposite to a second voltage induced in the switched-mode power supply by leakage flux of the transformer at a switching moment of the switch.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: May 31, 2016
    Assignee: SALCOMP OYJ
    Inventors: Ilkka Suorsa, Jarmo Minkkinen
  • Patent number: 9356526
    Abstract: A DC-DC power conversion apparatus and a DC-DC power conversion method are provided. The DC-DC power conversion apparatus includes a switching circuit, a main transformer circuit, a main rectifier circuit, an auxiliary transformer circuit and an auxiliary rectifier circuit. The switching circuit provides an input power to a primary winding of the main transformer circuit or a primary winding of the auxiliary transformer circuit by time-division. An AC input terminal of the main rectifier circuit is coupled to a secondary winding of the main transformer circuit. An AC input terminal of the auxiliary rectifier circuit is coupled to a secondary winding of the auxiliary transformer circuit. A power output terminal of the auxiliary rectifier circuit is coupled to a reference voltage terminal of the main rectifier circuit for lifting a voltage of the power output terminal of the main rectifier circuit.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: May 31, 2016
    Assignee: Industrial Technology Research Institute
    Inventors: Chi-Seng Lee, Nan-Hsiung Tseng, Chin-Hone Lin, Wei-Han Lai, Hidekazu Miwa, Jih-Sheng Lai
  • Patent number: 9351360
    Abstract: Various embodiments relate to a drive circuit for an illumination device and an illumination device. The drive circuit includes a first drive module, wherein the first drive module is configured to convert an alternating current signal from a power supply to a constant current drive signal supplied to a light-emitting unit of the illumination device, and wherein the drive circuit further includes a second drive module, and wherein the second drive module is in series connection with the first drive module and the light-emitting unit and is configured to hold a voltage which is applied across the second drive module by the constant current drive signal, and the second drive module further includes a first switch means which is driven by the held voltage to turn on such that a current signal output from the second drive module is a direct current signal.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: May 24, 2016
    Assignee: OSRAM GMBH
    Inventor: Quan Zhang
  • Patent number: 9348383
    Abstract: Described is a soft-start scheme for a voltage regulator. The apparatus comprises: a first voltage regulator to provide regulated voltage to an output node coupled to a load, the first voltage regulator operable to be in open loop via a bypass unit, the first voltage regulator including a comparator; and a second voltage regulator, coupled to the first voltage regulator, operable to be in closed loop, via the bypass unit, to provide a reference voltage for the comparator of the first voltage regulator.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: May 24, 2016
    Assignee: Intel Corporation
    Inventors: Raghu Nandan Chepuri, Fenardi Thenus, Peng Zou, Henry W. Koertzen
  • Patent number: 9350260
    Abstract: A method comprises providing a resonant converter comprising a switching network comprising a plurality of switches, a resonant tank coupled between the switching network and a transformer, wherein the resonant tank comprises a series resonant inductor coupled to a switching network and the transformer and a series resonant capacitor coupled to the switching network and the transformer and a driver having an adjustable bias voltage and in response to a startup process of the resonant converter, configuring the switching network to operate a switching frequency higher than a resonant frequency of the resonant tank.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: May 24, 2016
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventors: Heping Dai, Daoshen Chen, Xujun Liu, Liming Ye
  • Patent number: 9341358
    Abstract: In accordance with systems and methods of the present disclosure, an apparatus may include a power converter and a controller. The controller may be configured to monitor a voltage at an input of the power converter, cause the power controller to transfer energy from the input to a load at a target current, decrease the target current responsive to determining that the voltage is less than or equal to an undervoltage threshold, and increase the target current responsive to determining that the voltage is greater than or equal to a maximum threshold voltage.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: May 17, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Eric J. King, Daniel J. Baker, John L. Melanson
  • Patent number: 9343988
    Abstract: Circuits, systems, and methods of current mode regulation include a primary side for receiving an input signal and a secondary for outputting an output signal. A regulator spans the primary and secondary sides in a configuration by which the input signal may be rectified and thereafter provided to the output node as an output signal. A current monitor is provided at the output node for comparing the output signal to a reference. A communication link is included for providing feedback to the primary side of the regulator for use in regulating the signal.
    Type: Grant
    Filed: August 4, 2012
    Date of Patent: May 17, 2016
    Assignee: TRIUNE SYSTEMS, LLC
    Inventors: Ross E. Teggatz, David D. Briggs, Amer H. Atrash, Wayne T. Chen
  • Patent number: 9343970
    Abstract: A converter and method for reducing voltage of node thereof are disclosed herein. The converter includes a first transmitting circuit and a second transmitting circuit. The first transmitting circuit is configured to receive a first AC voltage. The second transmitting circuit is electrically coupled to the first transmitting circuit and the second transmitting circuit is configured to transmit a second AC voltage according to the first AC voltage. One of the first transmitting circuit and the second transmitting circuit includes at least one divider unit and the other one of the first transmitting circuit and the second transmitting circuit includes at least two divider units. Each of the divider units includes an inductor network and a capacitor network coupled in series. The inductor network and the capacitor network of the adjacent divider units are coupled in series alternately.
    Type: Grant
    Filed: May 6, 2014
    Date of Patent: May 17, 2016
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Chao Yan, Wei-Qiang Zhang, Li-Zhi Xu, Xin-Lei Li
  • Patent number: 9318968
    Abstract: The present invention provides a series of DC-DC converter circuit designs, and DC-DC converters based on such circuit design, that provide high input-to-output voltage conversion. The converters include a resonant tank and a means for interrupting the tank current to produce a near zero-loss “hold” state wherein zero current and/or zero voltage switching is provided, while providing control over the amount of power transfer. A resonant DC-DC converter for high voltage step-up ratio in accordance with the circuit design includes: (a) a low voltage DC-AC converter, (b) a resonant tank, (c) a high voltage AC-DC converter, (d) a (i) common ground on an input and an output without use of a transformer and/or (ii) a single high voltage controllable switch within the resonant tank.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: April 19, 2016
    Assignee: UNIVERSITY OF TORONTO GOVERNING COUNCIL
    Inventor: Peter Waldemar Lehn
  • Patent number: 9306470
    Abstract: An inverter control module electrically connected to an inverter module is disclosed to include an error detection unit for receiving a control signal and a feedback signal from an external source and processing these signals and then outputting a corresponding error signal, a signal amplifier module electrically coupled to the error detection unit for receiving the error signal and amplifying the error signal or raising the frequency of the error signal and then outputting the processed signal, and a driver module electrically coupled to the signal amplifier module for receiving the amplified or frequency-raised error signal and generating a corresponding driving signal and then outputting the driving signal to a power module of the inverter module for driving the power module to work.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: April 5, 2016
    Assignee: SHUN-FU TECHNOLOGY CORP.
    Inventors: Shun-Hua Lee, Yung-Sheng Huang
  • Patent number: 9305699
    Abstract: A transformer driver circuit couples to a transformer having a primary winding, a secondary winding, and a transformer tap that is connected to a first voltage source. The primary winding electrically connects at its ends to respective unipolar controllable current sinks that form part of an integrated circuit. The transformer driver circuit operates by each current sink selectively sinking current from the end of the primary winding to which it is connected so as to cause current to flow in the secondary winding in a push-pull fashion. The transformer driver circuit further includes a load electrically connected to the secondary winding and protection circuitry operative to protect the integrated circuit from input levels greater than it can withstand.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: April 5, 2016
    Assignee: Broadcom Europe Limited
    Inventors: Jonathan Ephraim David Hurwitz, Seyed Danesh, Steven Maughan
  • Patent number: 9293998
    Abstract: A two-transistor flyback converter includes a transformer having a primary side and a secondary side, a first transistor connected between an input voltage source and a first terminal of the primary side, a second transistor connected between ground and a second terminal of the primary side, and a diode directly connected between the first terminal of the primary side and ground. The first and second transistors are operable to switch on and off simultaneously and with no current return from the primary side to the input voltage source when the input voltage source is less than a reflected voltage from the secondary side.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: March 22, 2016
    Assignee: Infineon Technologies Austria AG
    Inventors: Mladen Ivankovic, Fred Sawyer