For Rectifier System Patents (Class 363/84)
  • Patent number: 10224819
    Abstract: A power circuit substantially canceling ripples at the source. The power circuit includes a switching circuit configured to control a power flow between an input and an output, a main storage element electrically connected in series with the switching circuit, and a resonant tank electrically coupled to the switching circuit and configured to compensate for switching ripples in the main storage element. Aspects of the invention can be applied to a converter circuit or to an inverter circuit.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: March 5, 2019
    Assignee: The Curators of the University of Missouri
    Inventors: Pourya Shamsi, Mehdi Ferdowsi
  • Patent number: 10063091
    Abstract: Provided is a standby power saving circuit. A switching element is arranged between a SMPS supplying power to a load and a power supply unit supplying power to the SMPS to block power supply to SMPS in a standby mode by turning off the switching element in the standby mode and to supply power to the SMPS only when an electronic device operates. In addition, a circuit supplying a power to a load and a circuit for supplying a standby power are separated, a power storage unit for supplying a driving power to the switching element is arranged inside the circuit for supplying the standby power, and if a charged power of the power storage unit is lower than a reference value, power is supplied to only the circuit for supplying the standby power, and the power storage unit is charged. Therefore it is possible to reduce a standby power.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: August 28, 2018
    Assignee: DAJAE TECH CO., LTD
    Inventor: Yeon Moon Jeong
  • Patent number: 9983602
    Abstract: Presented systems and methods can facilitate efficient voltage sensing and regulation. In one embodiment, a presented multiple point voltage sensing system includes Multiple point voltage sensing. Multi-point sensing is the scheme where voltage feedback from Silicon to the voltage regulator is an average from multiple points on the die. In one embodiment, multi-point sensing is done by placing multiple sense points across the partition/silicon and merging the sense traces from each sense point with balanced routing. In one embodiment, a presented multiple point voltage sensing system includes Virtual VDD Sensing with guaranteed non-floating feedback. In one exemplary implementation, Virtual VDD Sensing with guaranteed non-floating feedback allows more accurate sensing when a component is power gated off by removing the sensing results associated with the component.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: May 29, 2018
    Assignee: NVIDIA CORPORATION
    Inventors: Tezaswi Raja, Sagheer Ahmad
  • Patent number: 9912229
    Abstract: A multiple-output integrated power factor correction system includes, for example, a processor that is formed in a substrate and is arranged to monitor each voltage output of two or more output stages of a power supply and in response to generate an individual voltage error signal for each monitored output stage. A combined output voltage error signal is generated in response to each of the individual voltage error signals. The voltage input to the power supply and the total inductor current of the power supply are monitored and used to generate a combined output voltage control signal in response to the monitored input voltage total inductor current as well as the combined output voltage error control signal. Each individual output voltage control signal for each monitored output stage is generated in response to each of the respective generated individual voltage error signals.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: March 6, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Shamim Choudhury, Zhenyu Yu, Zhong Ye
  • Patent number: 9882468
    Abstract: A power conversion device includes a power supplying terminal, a switching converter, a signal injector, a coupler circuit, a detecting circuit and a controller. After an input voltage is converted into an output voltage by the switching converter, the output voltage is outputted to a load through the power supplying terminal. The signal injector provides a signal. When the load is connected with the power supplying terminal, an operating parameter at the first end of the coupler circuit has a first variation value in response to the signal. When the load is disconnected from the power supplying terminal, the operating parameter at the first end of the coupler circuit has a second variation value in response to the signal. According to the detecting result of the detecting circuit, a switching action of the switching element is selectively enabled or disabled by the controller.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: January 30, 2018
    Assignee: DELTA ELECTRONICS INC.
    Inventor: Sheng-Hua Li
  • Patent number: 9847709
    Abstract: A switched-mode power supply device that rectifies and smoothes a direct input voltage to obtain a predetermined output voltage is disclosed. A series circuit includes a reactor and a switching element and the circuit switches the direct input voltage. An OFF time calculator calculates an OFF time of the switching element based on the direct input voltage, the output voltage, and an ON time of the switching element calculated based on the output voltage and a reference value. A frequency calculator calculates at least one of a period and a frequency based on the OFF time calculated by the OFF time calculator and the ON time. A controller that controls switching of the switching element based on a result of comparison between one of the period and the frequency, and a corresponding one of a reference period and the reference frequency.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: December 19, 2017
    Assignee: SANKEN ELECTRIC CO., LTD.
    Inventor: Toshihiro Nakano
  • Patent number: 9843269
    Abstract: When power consumption of a load is smaller than a first threshold, a switch element of each of one or more circuits is made nonconductive to supply power from all of the one or more circuits to the load. When the power consumption of the load is larger than the first threshold, the switch element of at least one of the one or more circuits is made intermittently conductive to supply power from all of the one or more circuits to the load.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: December 12, 2017
    Assignee: Daikin Industries, Ltd.
    Inventors: Kazuhiro Ohshita, Kazuhiro Nakatani, Norio Sakae, Mitsuru Imoto
  • Patent number: 9799288
    Abstract: The present invention discloses a driving circuit and a liquid crystal display device. An anode of a first diode is employed for inputting a voltage, and a cathode of the first diode is coupled to an anode of a second diode, and a cathode of the second diode is coupled to an anode of a third diode, and a cathode of the third diode is coupled to an anode of a fourth diode, and a cathode of the fourth diode is employed for outputting the voltage.
    Type: Grant
    Filed: September 24, 2015
    Date of Patent: October 24, 2017
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Xianming Zhang
  • Patent number: 9553504
    Abstract: Disclosed are a power factor correction circuit and a power adapter, and the power factor correction circuit includes a sampler, a controller and a current limiter, and the controller includes an error amplification unit, a peak value adjusting unit, an ON/OFF computing unit and a phase lock unit. The sampler is coupled to the phase lock unit, and the current limiter is coupled to the error amplification unit and the ON/OFF computing unit, so as to achieve the effects of enhancing the power factor property of the power factor correction circuit, lowering the manufacturing cost, and improving the electric power utilization.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: January 24, 2017
    Inventors: Yung-Hong Wang, Zhi-Jian Fan
  • Patent number: 9374010
    Abstract: A power adaptor is provided. The power adaptor includes a voltage converter, a connecting port, a first transformer and a controller. The voltage converter receives an input voltage and determines whether to convert the input voltage to an output voltage according to an indicating signal. The first transformer includes a primary side and a secondary side. The primary side and the secondary side are coupled to each other, and a first end and a second end of the secondary side are coupled to the connecting port, respectively. The controller generates the indicating signal according to a voltage at the primary side of the first transformer. The connecting port is used to connect to an electrical device, and when the connecting port is electrically connected to the electrical device, a first end and a second end of the secondary side are short to a reference ground end of the secondary side.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: June 21, 2016
    Assignee: ASUSTeK COMPUTER INC.
    Inventors: Yu-Cheng Shen, Yu Hung
  • Patent number: 9318974
    Abstract: A multi-level inverter having one or more banks, each bank containing a plurality of low voltage MOSFET transistors. A processor configured to switch the plurality of low voltage MOSFET transistors in each bank to switch at multiple times during each cycle.
    Type: Grant
    Filed: September 13, 2014
    Date of Patent: April 19, 2016
    Assignee: Solaredge Technologies Ltd.
    Inventors: Ilan Yoscovich, Tzachi Glovinsky, Guy Sella, Yoav Galin
  • Patent number: 9312788
    Abstract: A control device and control method of power conversion unit applied to a three-phase AC grid. The control device includes detection unit, current detection unit, and signal processing unit. The detection unit detects three-phase voltage signal of the three-phase AC grid and calculates and generates negative sequence reactive current given signal. The current detection unit detects current of the power conversion unit to output feedback current signal. The signal processing unit receives the negative sequence reactive current given signal, positive sequence current given signal, and the feedback current signal to output modulation signal. The power conversion unit is electrically coupled to the signal processing unit and the three-phase AC grid. The power conversion unit absorbs negative sequence reactive currents from the three-phase AC grid according to the modulation signal when the three-phase voltage signal is unbalanced to reduce negative sequence voltage at output terminal of the power conversion unit.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: April 12, 2016
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Hai-Fen Xue, Li Cai, Chao Tian, Dian-Chen Zheng
  • Patent number: 9271355
    Abstract: In an example embodiment, a controller generates a switch signal for controlling a switch to convert an input signal from a phase cut dimmer into a driving signal for a solid state lighting element. The controller determines a conduction period of the input signal from the phase cut dimmer within a half cycle period of the input signal, determines a burst period within the conduction period is a period of time less than the conduction period, and generates a switch signal comprising a plurality of switching cycles over the burst period. The switch signal has first and second subsets of switching cycles. The controller controls the switching cycles of the second subset such that the average energy transferred per switching cycle to the driving signal is less than the average energy transferred per switching cycle to the driving signal for the switching cycles of the first subset.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: February 23, 2016
    Assignee: NXP B.V.
    Inventors: Leendert van den Broeke, Robert de Nie
  • Patent number: 9246404
    Abstract: The present disclosure discloses a power converter providing a low output voltage from an offline AC. The power converter defines a voltage window for the input AC signal. Inside the voltage window, the rectified DC waveform is passed through to the output and the storage capacitor; outside the voltage window, the power converter is idle (or the output is blocked from input) and let the output storage capacitor alone supply the load.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: January 26, 2016
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Joseph Urienza, Yiqing Jin
  • Patent number: 9093903
    Abstract: The present disclosure discloses a power converter providing a low output voltage from an offline AC. The power converter defines a voltage window for the input AC signal. Inside the voltage window, the rectified DC waveform is passed through to the output and the storage capacitor; outside the voltage window, the power converter is idle (or the output is blocked from input) and let the output storage capacitor alone supply the load.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: July 28, 2015
    Assignee: Monolithic Power Systems, Inc.
    Inventors: Rajesh Swaminathan, Joseph Urienza
  • Publication number: 20150146460
    Abstract: A power factor correction apparatus (10) is applied to a power application system (20). The power application system (20) outputs a rectified power (202) to the power factor correction apparatus (10). The power factor correction apparatus (10) includes a detection unit (102), a control unit (104), a variable capacitance unit (106) and a power factor correction unit (108). The variable capacitance unit (106) filters the rectified power (202). The detection unit (102) detects a status of the power application system (20) and then informs the control unit (104). According to the status of the power application system (20), the control unit (104) is configured to control a capacitance of the variable capacitance unit (106), so that a power factor of a power outputted from the power factor correction unit (108) to the power application system (20) is rising.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 28, 2015
    Applicant: Chicony Power Technology Co., Ltd.
    Inventor: Ching-Chang LIN
  • Publication number: 20150138856
    Abstract: A power supply system includes an Offline Total Power Management Integrated Circuit (OTPMIC). The OTPMIC controls a Power Factor Correction (PFC) converter, a main AC/DC converter, and a standby AC/DC converter. A PFC Autodetect circuit in the OTPMIC monitors current flow in the PFC converter. If a high power condition is detected, then the PFC Autodetect circuit enables the PFC converter. The high power condition may be a voltage drop across a current sense resistor of a predetermined voltage for a predetermined time, within one half period of the incoming AC supply voltage. If a low power condition is detected, then the PFC Autodetect circuit disables the PFC converter. The PFC Autodetect circuit stores an IMON value that determines the predetermined voltage, and a TMON value that determines the predetermined time. The IMON and TMON values are loaded into the Autodetect circuit across an optocoupler link of the standby converter.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 21, 2015
    Applicant: Active-Semi, Inc.
    Inventors: Steven Huynh, Hue Khac Trinh, Khanh Quang Dinh, Duong Cong Le, Degang Xia
  • Publication number: 20150113295
    Abstract: Examples disclose a controller with a meter interface to receive a first input power measurement provided from a meter. The meter delivers input power to a rectifier which delivers power to a load. Additionally, the examples disclose the controller with a rectifier interface to receive a second input power measurement provided from the rectifier. Further, the examples disclose the controller to manage the rectifier based on the first and the second input power measurements.
    Type: Application
    Filed: July 31, 2012
    Publication date: April 23, 2015
    Inventors: David Paul Mohr, Michael G. Waters, Zachary J. Gerbozy
  • Publication number: 20150091461
    Abstract: According to one embodiment, there is provided a power supply device which includes a power conversion circuit which outputs an input power to an LED element as a load by converting the input power into a predetermined output power; and a control circuit which performs a feedback control of the power conversion circuit by detecting the output power of the power conversion circuit, and performs a dimming control which causes the LED element to be subject to a dimming operation based on a dimming signal which is output from a dimmer, in which, when a dimming OFF signal is input, the power conversion circuit outputs power which causes the LED element to be turned off while continuing an operation of the power conversion circuit.
    Type: Application
    Filed: March 7, 2014
    Publication date: April 2, 2015
    Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
    Inventors: Hiroto Nakamura, Go Kato, Naoko Iwai
  • Publication number: 20150070953
    Abstract: A waveform shape discriminator includes a running maximum finder circuit coupled to receive a sense signal. The running maximum finder circuit is coupled to update a running maximum signal in response to the sense signal. A first comparator is coupled to receive the sense signal and a running maximum threshold signal that is representative of the running maximum signal. A search window block is coupled to receive the input signal to detect a search window in the sense signal. An output circuit is coupled to an output of the first comparator and an output of the search window block to determine a presence of a waveform shape in the sense signal within the search window in the sense signal.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 12, 2015
    Applicant: Power Integrations, Inc.
    Inventor: Roger Colbeck
  • Publication number: 20150049528
    Abstract: A power factor correction (PFC) boost circuit. The PFC boost circuit can include a first switching device, a second switching device, a first gate driver coupled to the first switching device, a second gate driver coupled to the second switching device, and a PFC controller configured to control the first and second gate drivers. The PFC controller will utilize a new technique, referred to herein as “predictive diode emulation” to control the switching devices in a desired manner and to overcome inefficiencies and other problems that might arise using traditional diode emulation. The PFC controller is configured to operate in synchronous and non-synchronous modes.
    Type: Application
    Filed: May 30, 2013
    Publication date: February 19, 2015
    Applicant: EFFICIENT POWER CONVERSION CORPORATION
    Inventors: Michael A. De Rooij, Johan Strydom
  • Patent number: 8957547
    Abstract: An uninterruptible power supply (UPS) includes a rectifier, a buck converter, a solar energy module, a boost converter, a controller, and a power distribution unit (PDU). The solar energy module receives solar energy and converts the solar energy to a first DC voltage. The controller compares the first DC voltage with a preset voltage, and outputs a control signal to turn the boost converter on or off. When the boost converter is turned off, the rectifier receives an AC voltage from the AC power source and converts this to a rectified DC voltage which is output to the buck converter. When the boost converter is turned on, the boost converter converts the first DC voltage to a second DC voltage. The buck converter converts the rectified DC voltage or the first DC voltage to a working DC voltage and outputs to a power supply unit through the PDU.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: February 17, 2015
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Kuo-Hsiang Chang, Yu-Chi Tsai
  • Patent number: 8958218
    Abstract: An energy conversion system for use with an alternative energy source is disclosed. The alternative energy source can generate either an AC or a DC voltage. A first power converter is connected between the source and a DC bus, and a second power converter is connected between the DC bus and the grid or another load. The first power converter is configured to operate during periods of low energy generation. The energy captured will be stored in an electrical storage medium. When sufficient energy is stored, this energy is subsequently transferred to the grid or load via the second power converter. The second power converter is configured to operate intermittently during periods of low power generation, transferring energy from the DC bus when sufficient energy is stored and turning off when the stored energy drops to a point at which the second power converter can no longer be operated efficiently.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: February 17, 2015
    Assignee: ZBB Energy Corporation
    Inventors: Jeffrey A. Reichard, Nathan Jobe
  • Publication number: 20150029768
    Abstract: An AC to DC power supply is provided based on feedback control of an analog current blocking (ACB) device. The ACB element receives rectified high voltage AC. The output of the ACB element is provided to an integrating circuit that provides an output DC voltage. The output DC voltage depends on the average current passed by the ACB element. The average current passed by the ACB element depends on the current limit of the ACB element, which is under feedback control.
    Type: Application
    Filed: July 25, 2014
    Publication date: January 29, 2015
    Inventor: Andrew J. Morrish
  • Patent number: 8937821
    Abstract: A DC power supply apparatus comprising: a rectifying circuit including, a first rectifying portion, a second rectifying portion, a third rectifying portion and a fourth rectifying portion; a current detection portion; a first switching portion; and a second switching portion; wherein each of the first rectifying portion cooperatively operating with the first switching portion and the second rectifying portion cooperatively operating with the second switching portion is a semiconductor element which is formed by using a Schottky junction formed between silicon carbide or gallium nitride and metal and has a withstanding voltage property with respect to a voltage of an AC power supply.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: January 20, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Katsuyuki Amano, Daisuke Suzuki, Katsuhiko Saito
  • Publication number: 20150016164
    Abstract: The high-voltage power supply apparatus includes an inductor to be applied with a voltage when a driving unit is driven by a drive signal at a predetermined frequency, a rectification unit connected to both ends of the inductor, the rectification unit including multiple capacitors and multiple diodes, a current detection unit configured to detect a current flowing through the rectification unit, and a control unit configured to control a duty of the drive signal based on a result of detection by the current detection unit.
    Type: Application
    Filed: July 8, 2014
    Publication date: January 15, 2015
    Inventor: Toshiki Takajou
  • Publication number: 20140376290
    Abstract: An AC to DC circuit includes a rectifier circuit, a voltage detecting circuit, the current source and the output circuit. The rectifier circuit converts the AC power to pulsating DC. The constant current source provides current to the voltage detection circuit and to the control port of the output circuit. The current passing throughout the constant current source is the sum of the current flowing to the voltage detection circuit and to the output circuit. The voltage detection circuit increases with the instantaneous value of the output voltage of the rectifier circuit, it absorbs more current from the current provided by the constant current source and less current flows from the constant current source to the control port of the output circuit. The output circuit amplifies the current of the control port and outputs it to power the load.
    Type: Application
    Filed: April 28, 2012
    Publication date: December 25, 2014
    Applicant: MORNSUN GUANGZHOU SCIENCE&TECHNOLOGY LTD.
    Inventors: Baojun Wang, Xiangyang Yin
  • Publication number: 20140369091
    Abstract: A drive controller and a method for operating a drive controller having a converter with a DC link circuit, includes measuring during operation phase currents generated by the converter; forming from the measured phase currents a current vector in a first coordinate system; rotating, with a first transformation angle and with a first rate of change, the current vector into a second coordinate system to generate a resulting current vector; supplying the resulting current vector to a regulator to generate a resulting voltage vector at an output of the regulator; rotating, with the first transformation angle or with a second transformation angle rotating at the first rate of change, the resulting voltage vector back into the first coordinate system to generate a resulting back-transformed voltage vector; and using the resulting back-transformed voltage vector as an influencing variable in addition to U/f control or vector regulation for controlling the converter.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 18, 2014
    Inventors: Franz Bauer, HUBERT SCHIERLING
  • Patent number: 8901901
    Abstract: A multiphase power converter includes one or both of a phase control circuit and a valley switching locking circuit. The phase control circuit measures a phase difference between a first phase circuit and a second phase circuit and varies an on-time of a drive switch of the second phase circuit to produce and maintain a predetermined phase difference between the first phase circuit and the second phase circuit. When the multiphase power converter is operating in a discontinuous mode of operation, the valley switching locking circuit counts the number of zero crossings of an input current of the first phase circuit and blocks a second zero crossing detection signal from a waveform generator (i.e., PWM driver) associated with the second phase circuit until an input current of the second phase circuit has as many zero crossings as that of the first phase circuit input current.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: December 2, 2014
    Assignee: PAI Capital LLC
    Inventors: Silvio Ziegler, Ivan Feno
  • Patent number: 8896157
    Abstract: The power supply includes a first power connector, a power conversion circuit, a control unit and a detection circuit. The first power connector includes a plurality of power terminals and a first detecting terminal. The power conversion circuit is coupled to the power terminals of the first power connector for converting an input voltage into an output voltage. The control unit is coupled to the power conversion circuit for controlling an operation of the power conversion circuit. The detection circuit is coupled to the control unit and the first detecting terminal of the first power connector for detecting if the first detecting terminal is connected or disconnected with a predetermined voltage terminal and correspondingly generating a power transmission status signal to the control unit.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: November 25, 2014
    Assignee: Delta Electronics, Inc.
    Inventor: Yu-Hung Huang
  • Patent number: 8897037
    Abstract: Power conversion system and method. The system includes a first capacitor, a second capacitor, and a plurality of diodes including a first diode, a second diode, a third diode, and a fourth diode. Additionally, the system includes a fifth diode including a first anode and a first cathode and a sixth diode including a second anode and a second cathode. Moreover, the system includes a primary winding, and a secondary winding coupled to the primary winding. The first anode is connected to a first input terminal, and the second anode is connected to a second input terminal. The first input terminal and the second input terminal are configured to receive an input voltage. The secondary winding is configured to generate an output voltage based on at least information associated with the input voltage.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: November 25, 2014
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yingchieh Lin, Bo Li, Lieyi Fang
  • Patent number: 8890463
    Abstract: A direct current bus management system can include a power management and distribution unit, having a source management section, a bus management section coupled to the source management section, a load management section coupled to the bus management section, a DC bus coupled to the power management and distribution unit, a plurality of DC sources coupled to the source management section and a plurality of loads coupled to the load management section, wherein the bus management section is configured to reconfigure excess DC power on the DC bus from the DC inputs from the plurality of DC sources based on a plurality of priorities, a plurality of feedback signals and a plurality of system parameters.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: November 18, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Gregory I. Rozman, Steven J. Moss
  • Patent number: 8879288
    Abstract: A command value is a current command value with a triangular-like waveform having a cycle that is ? of a cycle of a three-phase voltage. A carrier has a triangular-like waveform having a cycle shorter than the cycle of the command value. Comparison result signals are pulse signals indicating a result of the comparison between the carrier and the command value. In a region of a phase of 30 to 90 degrees, a portion of the comparison result signal present in this region is employed as a gate signal. In a region of a phase of 270 to 330 degrees, a portion of the comparison result signal present in this region is employed as the gate signal.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: November 4, 2014
    Assignee: Daikin Industries, Ltd.
    Inventor: Takayuki Fujita
  • Publication number: 20140320091
    Abstract: In a control method for supplying power, a first power regulator supplies a first current and an output voltage to a second power regulator and the second power regulator supplies a second current to a load. The method includes: increasing the output voltage and detecting the second current; determining whether the second current suddenly drops as the output voltage increases; when the second current drops, defining a level of the output voltage which corresponds to a starting point of the sudden drop as an upper limit; when the output voltage increases but the second current neither increases nor suddenly drops, defining a level of the output voltage corresponding to a point where the second current stops increasing as a lower limit; and setting the output voltage to be lower than or equal to the upper limit, and higher than or equal to the lower limit.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 30, 2014
    Applicant: RICHTEK TECHNOLOGY CORPORATION
    Inventor: Nien-Hui Kung
  • Patent number: 8837180
    Abstract: A power supply switch apparatus includes a voltage decreasing circuit, a rectification circuit, a comparison circuit, and a control circuit. The voltage decreasing circuit receives a first alternating voltage output from a power supply and converts the first alternating voltage to a second alternating voltage. The rectification circuit receives the second alternating voltage and converts the second alternating voltage to a first direct voltage. The voltage regulating circuit receives the first direct voltage and converts the first direct voltage to a second direct voltage. The comparison circuit receives the second direct voltage, compares the second direct voltage with a reference voltage, and outputs a control signal. The control circuit receives the control signal and connects the power supply to different circuits according to the control signal.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: September 16, 2014
    Assignees: Hong Fu Jin Precision Industry (WuHan) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Zhi-Yong Gao, Yun-Fei Zhang, Yu-Lin Liu
  • Patent number: 8830705
    Abstract: A power converter configured to improve power capture in a wind turbine during low wind speed operation is disclosed. The power converter converts the power generated by the alternator of the wind turbine into a suitable AC current for delivery to a utility grid or to an electric load independent of the utility grid. The power converter is configured to operate in multiple operating modes, utilizing both synchronous and non-synchronous control methods, to extend the operating range of the power converter. During non-synchronous operation, the power converter utilizes a modulation routine that may either vary the dead-time compensation period during a constant modulation period or vary the modulation period with a constant on-time. A seamless transfer between non-synchronous and synchronous control methods with low total harmonic distortion (THD) improves the range of power generation for wind generators.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: September 9, 2014
    Assignee: ZBB Energy Corporation
    Inventors: Jeffrey A. Reichard, Nathan Jobe, Thomas Alan Laubenstein
  • Publication number: 20140245030
    Abstract: In an embodiment, set forth by way of example and not limitation a USB power converter for an electronic device includes a USB bus including VBUS power line, a D? data line and a D+ data line, a variable voltage converter, a processor clock, a USB transceiver coupled to the D? data line and the D+ data line, and a processor coupled to processor clock and to the USB transceiver. Preferably, the variable voltage converter has an alternating current (AC) input, a direct current (DC) output coupled to the VBUS power line, and a voltage control input responsive to a voltage control signal to provide a plurality of voltage levels at the DC output. The process is, in this example embodiment, operative to develop the control signal based upon communication from an electronic device connected to the USB bus.
    Type: Application
    Filed: February 22, 2013
    Publication date: August 28, 2014
    Applicant: MAXIM INTERGRATED PRODUCTS, INC.
    Inventor: MAXIM INTERGRATED PRODUCTS, INC.
  • Publication number: 20140241019
    Abstract: Multi-level rectifiers are provided. A multi-level rectifier may convert a medium AC voltage to a medium DC voltage. A multi-level rectifier may comprise an input inductor, a set of diodes, a set of switches, and a DC link comprising a set of capacitors. One end of the input inductor is coupled to the input AC voltage and the other end of the input inductor is coupled to a pair of diodes that are series connected. The set of switches may be regulated such that the inductor may be coupled to a DC voltage point of the DC link. A multi-level rectifier may operate under a set of operation modes. Each operation mode may be determined from the input voltage and the inductor current. Accordingly, a sinusoidal voltage at the fundamental frequency of the input voltage may be synthesized by selectively switching between adjacent operation modes of the set of operation modes.
    Type: Application
    Filed: February 27, 2014
    Publication date: August 28, 2014
    Applicant: VARENTEC, INC.
    Inventors: DEEPAKRAJ M. DIVAN, ROHIT MOGHE, ANISH PRASAI
  • Patent number: 8816752
    Abstract: A low voltage AC power controller uses a line coupled capacitor AC to DC converter circuit to obtain energy from AC line power supplied to an AC load and may be used with an external high voltage AC switching device to control power supplied to the AC load. The line coupled capacitor AC to DC converter circuit provides a low power device that senses characteristics of the power supplied to the load and can communicate sensed information and/or receive control information related to the power supplied to load.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: August 26, 2014
    Assignee: Silicon Laboratories Inc.
    Inventor: Eric B. Smith
  • Patent number: 8817505
    Abstract: A three-phase rectifier converts three-phase alternating current (AC) power supplied from a three-phase AC power supply into direct current (DC) power. The three-phase rectifier includes a full-wave rectifier circuit, a bidirectional switch circuit, and a controller. The full-wave rectifier circuit rectifies three-phase AC power to DC power. The bidirectional switch circuit switches on and off inputs of respective phases from the three-phase AC power supply to the full-wave rectifier circuit. The controller detects voltages of the respective phases of the three-phase AC power supply, generates switching patterns for the respective phases to switch the bidirectional switch circuit on and off based on the detected voltages of the phases, and controls switching of the bidirectional switch circuit based on the switching patterns.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: August 26, 2014
    Assignee: Fujitsu General Limited
    Inventor: Satoshi Ichiki
  • Patent number: 8804387
    Abstract: To measure input power as accurate as possible, a power supply apparatus includes an AC/DC converter that generates a direct-current internal power supply from an alternating-current commercial power supply, an output-voltage measurement unit that measures an output voltage of the internal power supply, an output-current measurement unit that measures an output current of the internal power supply, a temperature measurement unit that measures an environmental temperature of the power supply apparatus itself, a storage device that stores therein in advance conversion efficiency data in which a correspondence between a conversion efficiency ? of the AC/DC converter and the environmental temperature is recorded, and a computation unit that determines the conversion efficiency ? based on the environmental temperature and the conversion efficiency data and calculates the input power of the commercial power supply by using the determined conversion efficiency ?, the output voltage, and the output current.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: August 12, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Takahiko Yamanaka
  • Publication number: 20140218983
    Abstract: An additional electric power receiving method replacing conventional grounding with a negative voltage source includes the step of transmitting electromagnetic wave or current from a power supply source to a rectifier, wherein a grounding end of the rectifier is in electrical communication with the negative voltage source, and the negative voltage source is selected from a negative potential intrinsic of an organism. A device applicable to the electric power receiving method includes a rectifier having an input end and two output ends, wherein the input end is in electrical communication with a power supply source, and rectified direct current is transmitted from the output ends. With the method and device, not only an increase in additional electric power obtained is achieved, but conversion efficiency and stability of current and electromagnetic wave is enhanced.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 7, 2014
    Applicant: ARBL CO., LTD.
    Inventor: Chung-Pin LIAO
  • Publication number: 20140211526
    Abstract: In accordance with an embodiment, an electronic device includes a controller configured to apply slope compensation to a reference signal in a power factor corrector. The device also configured to adjust the slope compensation based on an input voltage of the power factor corrector.
    Type: Application
    Filed: January 31, 2013
    Publication date: July 31, 2014
    Applicant: Infineon Technologies AG
    Inventors: Albino Pidutti, Andrea Carletti
  • Publication number: 20140204638
    Abstract: Provided is a power supply apparatus with low power in a standby mode. The apparatus includes a voltage multiplier configured to multiply an input voltage and including a first terminal through which the multiplied voltage is output and a second terminal through which a voltage lower than a voltage of the first terminal is output; a main switch-mode power supply (SMPS) configured to receive the voltage of the first terminal of the voltage multiplier; and a standby SMPS configured to receive a voltage of the second terminal of the voltage multiplier.
    Type: Application
    Filed: February 1, 2013
    Publication date: July 24, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Jee-hoon JUNG
  • Patent number: 8787051
    Abstract: The disclosure provides a method for controlling an equivalent resistance of a converter. The method includes receiving a power source input signal, generating a first control signal according to a voltage level and a state of the power source input signal to adjust an equivalent resistance of the voltage conversion module and cause the voltage conversion module to operate in the damper mode or the converter mode, when the voltage conversion module operates in the converter mode converting the power source input signal to an output signal, and when the voltage conversion module operates in the damper mode detecting the voltage level or the current level of the power source input signal, and adjusting the equivalent resistance so that the voltage conversion module could operate in the bleeder mode or the converter mode to convert the power source input signal to the output signal.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: July 22, 2014
    Assignee: Macroblock, Inc.
    Inventors: Lon-Kou Chang, Yi-Wen Huang, Han-Hsiang Huang
  • Patent number: 8780596
    Abstract: A voltage adjusting circuit is provided includes an inducing circuit configured to induce a voltage from electromagnetic waves, a first rectifying circuit configured to rectify an output voltage of the inducing circuit, a control circuit configured to control an output voltage of the first rectifying circuit in response to the output voltage of the first rectifying circuit, and a second rectifying circuit configured to simultaneously rectify and regulate the output voltage of the inducing circuit in response to the output voltage of the first rectifying circuit.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: July 15, 2014
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Il Jong Song, Hang Seok Choi, Sang Hyo Lee
  • Publication number: 20140185342
    Abstract: The object of the present invention is to provide an electrical supply apparatus which keeps the loading of the supply system low. What is proposed for this purpose is an electrical supply apparatus, in particular a power supply unit comprising a power factor correction device 7, wherein the power factor correction device generates a current waveform signal from a predefined current waveform pattern half-cycle.
    Type: Application
    Filed: July 31, 2012
    Publication date: July 3, 2014
    Applicant: DIEHL AEROSPACE GMBH
    Inventors: Uwe Nieberlein, Jens Jordan, Günther Köninger
  • Publication number: 20140177301
    Abstract: There are provided a power module in which a bias voltage is varied and supplied to a control circuit controlling power conversion when an idle mode is switched to a normal mode, and a distributed power supply apparatus having the same. The power module includes: a power factor correction stage; a DC/DC conversion stage switching power to convert the power into pre-set DC power in a powering mode in which normal power is output; a standby stage converting the power into pre-set standby power in a cold standby mode in which the DC/DC conversion stage outputs power having a level lower than that of normal power; and a variable bias supply unit varying a voltage level of bias power for controlling DC/DC power conversion and supplying the same to the DC/DC conversion stage in the cold standby mode and the powering mode.
    Type: Application
    Filed: March 15, 2013
    Publication date: June 26, 2014
    Inventors: Chong Eun KIM, Jeong Nam LEE, Duk You KIM, Gun Woo MOON, Don Sik KIM
  • Publication number: 20140169049
    Abstract: A controller for a power converter and method of operating the same. In one embodiment, the controller includes a current-sense device couplable in series with switched terminals of power switches of interleaved switching regulators and configured to produce a current-sense signal. The controller also includes an error amplifier configured to produce an error signal as a function of a characteristic of the power converter. The controller also includes a duty-cycle controller configured to sample the current-sense signal at mid-points of duty cycles of the power switches and regulate the characteristic as a function of the error signal and the current-sense signal.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 19, 2014
    Applicant: POWER SYSTEMS TECHNOLOGIES, LTD.
    Inventor: Sriram Chandrasekaran
  • Publication number: 20140160817
    Abstract: There are provided a power factor correction circuit, and a power supply including the same, the power factor correction circuit including a main switch adjusting a phase difference between a current and a voltage of input power, a main inductor storing or discharging the power according to switching of the main switch, a snubber circuit unit including a snubber switch forming a transfer path for surplus power present before the main switch is turned on and a snubber inductor adjusting an amount of a current applied to the snubber switch, and a reduction circuit unit including an auxiliary inductor inductively coupled to the snubber inductor and an auxiliary resistor consuming power induced from the snubber inductor through the auxiliary inductor.
    Type: Application
    Filed: February 28, 2013
    Publication date: June 12, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: In Wha JEONG, Bum Seok SUH, Kwang Soo KIM