In Rectifier Systems Patents (Class 363/125)
  • Patent number: 10770982
    Abstract: An isolated synchronous rectifying DC/DC converter includes a drain terminal connected to a drain of a synchronous rectification transistor, a source terminal connected to a source of the synchronous rectification transistor; a comparator configured to compare a drain voltage of the drain terminal with a predetermined threshold voltage which set is based on a potential of the source terminal, a first flip-flop to which an OFF signal output from the comparator is input, a driver configured to output a gate signal to the synchronous rectification transistor based on an output signal of the first flip-flop, and a first abnormality detection circuit including an abnormality detection comparator configured to compare a voltage of the source terminal with a detection threshold voltage, and configured to output a first abnormality detection signal based on an output of the abnormality detection comparator.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: September 8, 2020
    Assignee: ROHM CO., LTD.
    Inventor: Hiroki Kikuchi
  • Patent number: 10763744
    Abstract: Disclosed are a PFC controller and a method of controlling the PFC controller. The PFC controller can include: a voltage controller configured to control a PFC output terminal voltage using a PFC output terminal voltage value and a PFC output terminal requirement voltage value; a current controller configured to control a PFC input terminal current by deriving a PFC input terminal requirement current value using an output of the voltage controller and by deriving a PFC duty using the PFC input terminal requirement current value and a PFC input terminal current value; and a distortion compensator configured to monitor an input voltage of an input power source, determine whether the input voltage is distorted, and prevent a divergence of the PFC input terminal current by transmitting a distortion frequency to the current controller when the input voltage is distorted.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: September 1, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Gi Bong Son, Gyu Tae Choi, Hui Sung Jang, Hyun Wook Seong
  • Patent number: 10742135
    Abstract: The invention relates to an energy recovery rectifier device (16), in particular for an industrial plant (2), for connection to an AC system (8), comprising an energy recovery rectifier (24) and a buffer capacitor (46) that is connected in parallel to the DC side (30) of the energy recovery rectifier (24). A step-up converter (52) is connected between the buffer capacitor (46) and the energy recovery rectifier (24). The invention further relates to a method (86) for operating an energy recovery rectifier device (16) as well as to an industrial plant (2) comprising an energy recovery rectifier device (16).
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: August 11, 2020
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Kurt Göpfrich, Hubert Schierling
  • Patent number: 10734903
    Abstract: An uninterruptible power supply apparatus (1) drives a converter (6) at a relatively high frequency (fH) and supplies an output voltage (VDC) of the converter (6) directly to a load (23) when a load current (IL) is greater than a predetermined value (Ic), and drives the converter (6) at a relatively low frequency (fL), steps up the output voltage (VDC) of the converter (6) by a bidirectional chopper (11), and supplies the output voltage (VDC) of the converter (6) to the load (23) when the load current (IL) is smaller than the predetermined value (Ic).
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: August 4, 2020
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventor: Masaru Toyoda
  • Patent number: 10622911
    Abstract: A rectifier circuit for a power supply includes a diode bridge, a first metal-oxide-semiconductor field-effect transistor (MOSFET) and a second MOSFET each coupled in parallel with corresponding diodes of the diode bridge to reduce losses associated with bridge diode voltage drops and increase conversion efficiency. A self-driven driver circuit is coupled for controlling switching operation of the first MOSFET and the second MOSFET to operate the first MOSFET and the second MOSFET as high-side floating synchronous rectifiers. Methods of supplying power via a rectifier circuit of a power supply are also described.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: April 14, 2020
    Assignee: Astec International Limited
    Inventors: Rahul Vinaykumar Davare, Robert Henry Kippley
  • Patent number: 10622890
    Abstract: A switched-mode power regulator circuit has four solid-state switches connected in series and a capacitor and an inductor that regulate power delivered to a load. The solid-state switches are operated such that a voltage at the load is regulated by repetitively (1) charging the capacitor causing a current to flow in the inductor and (2) discharging the capacitor causing current to flow in the inductor. The power regulator circuit may be configured to operate with zero current switching at frequencies in the range of 100 MHz, enabling it to be fabricated on a unitary silicon die along with the load that it powers.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: April 14, 2020
    Assignee: Empower Semiconductor, Inc.
    Inventors: David Lidsky, Timothy Alan Phillips
  • Patent number: 10574137
    Abstract: The system and method for dynamically reducing the peak electromagnetic interference produced by a group of electrical or electronic switching devices connected to a common communications bus. The system and method includes a fixed range of frequencies that includes frequencies emitted by the group of switching devices during normal operation and subranges of frequencies within the fixed range of frequencies, each subrange of frequencies being associated with a unique bus address of one switching device in the group of switching devices. Each subrange of frequencies being determined by the unique bus address of its associated switching device and characteristic weights dynamically determined and/or assigned to its associated switching device and/or load by a microprocessor implemented algorithm.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: February 25, 2020
    Assignee: Schneider Electric USA, Inc.
    Inventors: Michael Carter, Kevin M Jefferies, Benjamin W Edwards
  • Patent number: 10530155
    Abstract: A drive circuit drives a plurality of switching elements connected in parallel to each other. The drive circuit includes an operating unit that performs first and second switching processes. In the first switching process, under a condition that a first current detection value acquired before next time an on-command is received is determined to fall below a first threshold that is equal to or less than a threshold current, an on-operation target that is used the next time the on-command is received is set to a second switching element. In the second switching process, under a condition that the second current detection value acquired before the next time the on-command is received is determined to exceed a second threshold that is equal to or greater than the threshold current, the on-operation target that is used the next time the on-command is received is set to a first switching element.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: January 7, 2020
    Assignee: DENSO CORPORATION
    Inventor: Tetsuya Dewa
  • Patent number: 10476309
    Abstract: A wireless power transfer system includes a wireless power transmitter and a wireless power receiver. The wireless power receiver includes: a receiver resonator for wirelessly receiving power from the wireless power transmitter through resonant inductive coupling to generate an AC induced voltage; an AC-to-DC converter having a first input terminal and a second input terminal that are connected to the receiver resonator for receiving the AC induced voltage therefrom, and converting the AC induced voltage into a DC converted voltage; and a power storage element connected to the first and second input terminals of the AC-to-DC converter.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: November 12, 2019
    Assignee: NATIONAL CHI NAN UNIVERSITY
    Inventors: Yo-Sheng Lin, Chien-Chin Wang
  • Patent number: 10454300
    Abstract: An Uninterrupted Power Supply (UPS) power supply system is provided, which includes: a filter module connected to a mains supply and configured to filter an input from the mains supply; a BOOST module, where a first terminal of the BOOST module is connected to the filter module via a first switch group and connected to a battery via a second switch group, and a second terminal of the BOOST module is connected to a positive bus and a negative bus; and a bi-directional Direct Current/Direct Current (DC/DC) module, where a first terminal of the bi-directional DC/DC module is connected to the battery, and a second terminal of the bi-directional DC/DC module is connected to the positive bus and the negative bus.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: October 22, 2019
    Assignee: Vertiv Tech Co., Ltd.
    Inventors: Junrui Xu, Yunhe Mao, Fubin Xu, Yang Bing
  • Patent number: 10447194
    Abstract: A motor drive apparatus for driving a motor includes a rectifier, a capacitor, an inverter circuit, a control portion arranged to output a drive signal, and a sensing portion arranged to sense a smoothed direct-current voltage, and output an analog sensing result to the control portion. After outputting a drive signal to drive the motor, the control portion quantizes the sensing result using a predetermined number of bits at a predetermined interval for a period longer than a power-supply period of an alternating-current power supply, determines Vn+1 which satisfies both Vn+1>Vn+2 and Vn+1>Vn to be a peak value when Vn denotes an nth voltage value obtained by quantizing the sensing result, determines whether the peak value is within a predetermined range, and outputs a drive signal to stop the motor if the peak value is outside of the predetermined range.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: October 15, 2019
    Assignee: NIDEC SERVO CORPORATION
    Inventor: Masatomo Ishikawa
  • Patent number: 10389336
    Abstract: One embodiment describes a Josephson transmission line (JTL) system. The system includes a plurality of JTL stages that are arranged in series. The system also includes a clock transformer comprising a primary inductor configured to propagate an AC clock signal and a secondary inductor arranged in a series loop with at least two of the plurality of JTL stages. The clock transformer can be configured to propagate a single flux quantum (SFQ) pulse to set a respective one of the plurality of JTL stages in response to a first phase of the AC clock signal and to reset the respective one of the plurality of JTL stages in response to a second phase of the AC clock signal that is opposite the first phase.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: August 20, 2019
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Donald L. Miller, Ofer Naaman
  • Patent number: 10333400
    Abstract: A boost DC-DC converter includes: an input terminal; an output terminal; a first boost circuit configured to generate, from an input power to the input terminal, a first boosted power having a higher voltage than a voltage of the input power, and outputs the generated first boosted power from the output terminal; a second boost circuit configured to generate, from the input power, a second boosted power having a higher voltage than the voltage of the input power; and a storage capacitor configured to store the second boosted power as a storage power, and supply the storage power to the first boost circuit as an operation power source. The first boost circuit is configured to start a boost operation with the storage power when a voltage of the storage power is equal to or higher than a minimum operation voltage of the first boost circuit.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: June 25, 2019
    Assignee: ABLIC INC.
    Inventors: Fumiyasu Utsunomiya, Takakuni Douseki, Ami Tanaka
  • Patent number: 10320225
    Abstract: A charging system, a charge method, and a power adapter are provided. The charging system includes a battery, a first rectifying circuit, a switch circuit, a transformer, a second rectifying circuit, a sampling circuit, and a control circuit. The control circuit outputs a control signal to the switch circuit, and regulates a duty cycle of the control signal according to the current sampling value so that the voltage with the third pulsating waveform satisfies a requirement of charging the battery.
    Type: Grant
    Filed: January 7, 2017
    Date of Patent: June 11, 2019
    Assignee: Guangdong Oppo Mobile Telecommunications Corp., Ltd.
    Inventors: Chen Tian, Jialiang Zhang
  • Patent number: 10305392
    Abstract: The conversion apparatus includes a conversion module having a plurality of phases, each having a converter capable of performing voltage conversion of discharging electric power of a power source and a sensor detecting phase current flowing in the converter, and in which the phases are electrically connected in parallel, and a controller which controls each converter with a control signal based on a predetermined duty ratio. The controller includes a first determination unit which determines a basic duty ratio common to all of the plurality of phases, a second determination unit which determines a correction duty ratio for correcting the basic duty ratio at each of the converters, and a generation unit which generates a control signal based on the basic duty ratio and the correction duty ratio. The second determination unit determines the correction duty ratio, and sets an upper or lower limit value of the correction duty ratio.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: May 28, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventor: Masaaki Komatsu
  • Patent number: 10277140
    Abstract: This specification describes a device that includes a voltage-regulated DC-DC converter comprising a switching network, a resonant circuit, and control circuitry, wherein the switching network has a switching frequency. The DC-DC converter has an output impedance and the control circuity uses a control loop to control the DC-DC converter. The control circuitry implements the control loop using: an output voltage sensor configured to sense an output voltage of the DC-DC converter; and a compensator configured to adjust operation of the DC-DC converter based on the output voltage sensed by the output voltage sensor. The DC-DC converter comprises an output impedance suppression mechanism configured to at least partially suppress increases in the output impedance of the DC-DC converter.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: April 30, 2019
    Assignee: Google LLC
    Inventors: Liang Jia, Srikanth Lakshmikanthan
  • Patent number: 10236787
    Abstract: In a device for operating a rectifier, in particular a semi-controlled rectifier bridge, and a method for operating a rectifier, in particular a power converter, the rectifier is supplied from system phases, in particular from a three-phase AC voltage system, and supplies a unipolar voltage on the output side, the rectifier including controllable switches, in particular semiconductor switches such as thyristors, etc., a respective system phase supplying a respective current source, the current generated in each case being used as trigger signal for the controllable switch allocated to the respective system phase as a function of the state of a controllable switch unit.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: March 19, 2019
    Assignee: SEW-EURODRIVE GMBH & CO. KG
    Inventors: Norbert Hettel, Hans Jürgen Kollar
  • Patent number: 10205384
    Abstract: A resonant AC-to-DC converter apparatus includes an inductance circuit comprising an inductor with a first and connected in series with each phase of an AC power source comprising a fundamental frequency, and a capacitance circuit that includes a capacitance for each phase. Each capacitance is connected between a second end of the inductor of a phase and a neutral connection, and the capacitance and the inductor of the connected phase form a resonant frequency. The apparatus includes a rectification circuit with an input and an output, the input connected, for each phase, in series with the second end of the inductor of the phase. The resonant frequency is related to the fundamental frequency to provide a gain at the fundamental frequency, the gain boosting a voltage of the input to the rectification circuit at the fundamental frequency above an output voltage of the AC source.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: February 12, 2019
    Assignee: Wireless Advanced Vehicle Electrification, Inc.
    Inventors: Patrice Lethellier, Marcellus Harper, Ryan Calder
  • Patent number: 10193448
    Abstract: In one embodiment, a power supply control circuit may include a capacitive boost circuit having only three switches and only one boost capacitor. The capacitive boost circuit may be configured to receive an input voltage and form a first voltage to apply to an inductor. A control circuit of the power supply control circuit may be configured to switch an inductor switch at a first frequency to regulate the output voltage to the desired value, to switch the three switches at substantially the same frequency, and to adjust a duty cycle of the three switches.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: January 29, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Philip Crawley
  • Patent number: 10177662
    Abstract: A first control device sends a common required carrier frequency, and a synchronizing signal that is synchronous with a first triangular wave, to a second control device. On satisfaction of a first condition that a carrier frequency of the first triangular wave is different from the required carrier frequency, the first control device changes the carrier frequency of the first triangular wave to value of the required carrier frequency. The second control device calculates a recognizing carrier frequency of the first triangular wave, based on the synchronizing signal. On satisfaction of second conditions that a carrier frequency of a second triangular wave is different from the recognizing carrier frequency and that the recognizing carrier frequency is equal to the required carrier frequency from the first control device, the second control device changes the carrier frequency of the second triangular wave to value of the required carrier frequency.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: January 8, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Kazuya Taniguchi
  • Patent number: 10110041
    Abstract: A system is provided to allow for charging of a chemical storage device without a rectifier. A gate is used in conjunction with a gate controller. The gate controller monitors input voltage and opens the gate when voltage crosses a zero crossing in a first direction. The gate monitor then closes the gate when the voltage crosses a zero crossing in a second direction. This increases the chances that the output power will have voltage in a single direction. This output power is then fed to a chemical storage device, where it can be stored and used by one or more electronic devices.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: October 23, 2018
    Assignee: Keme, Inc.
    Inventors: Jeffrey Rose, Jennifer Fraser
  • Patent number: 10097027
    Abstract: A power bank device has an input connector, an output connector, a DC-to-DC switching converter, a plurality of battery cells coupled together in series, and novel light load detection circuitry. The power bank device is operable in a discharging mode in which the battery cells power the DC-to-DC converter, and the converter drives a regulated DC voltage onto the output connector. The detection circuitry detects whether a light load condition exists in which only a small amount of current is being output onto the output connector. If the condition is detected, then the converter is disabled so that current flow out of the output connector is stopped. In one example, the condition is detected by supplying a constant current onto the output connector and detecting whether the voltage on the output connector rises and stays above a predetermined voltage for a predetermined amount of time.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: October 9, 2018
    Assignee: Active-Semi, Inc.
    Inventor: Hong Mao
  • Patent number: 10097099
    Abstract: A power converter and a control method therefor are provided. The power converter includes a transformer, synchronous rectifier and a control circuit. A primary side of the transformer receives an input voltage, and a secondary side of the transformer generates a sensing signal. The synchronous rectifier is coupled to the secondary side of the transformer. The control circuit receives the sensing signal and detects a changing slope of the sensing signal, and accordingly generates a control signal to control the synchronous rectifier to be turned on or turned off, so as to regulate an output voltage of the power converter.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: October 9, 2018
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Yung-I Chang, Kuo-Hsien Huang
  • Patent number: 10008955
    Abstract: A synchronous rectification converter circuit is provided, including three transformer secondary-windings, three current transformers, a synchronous rectification switching circuit, a diode rectification circuit, and a control circuit. Each of three current transformers includes a primary-winding and secondary-winding. The three transformer secondary-windings and the three current transformer primary-windings are alternately connected in series to form a first triangular structure circuit. Three vertices of the first triangular structure circuit are connected to the synchronous rectification switching circuit. The three current transformer secondary-windings are connected in series to form a second triangular structure circuit. Three vertices of the second triangular structure circuit are connected to the diode rectification circuit. The diode rectification circuit is connected to the control circuit and the synchronous rectification switching circuit is connected to the control circuit.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: June 26, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Wenbin Chen, Kui Zhou
  • Patent number: 9997941
    Abstract: A charging and discharging system, a charging and discharging method, and a photovoltaic power generation system are provided. The charging and discharging system includes: a unidirectional converter, a unidirectional switch, an energy storage device and a controller; where an input terminal of the unidirectional converter is connected to an output terminal of a photovoltaic device of a photovoltaic power generation system to which the charging and discharging system is applied, and an output terminal of the unidirectional converter is connected to an input terminal of the energy storage device; the unidirectional switch is connected between an output terminal of the energy storage device and an input terminal of a bidirectional inverter of the photovoltaic power generation system to which the charging and discharging system is applied; the controller is connected to the unidirectional converter, the unidirectional switch, the energy storage device and the bidirectional inverter.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: June 12, 2018
    Assignee: SUNGROW POWER SUPPLY CO., LTD.
    Inventors: Lei Tao, Nianan Pan, Jigui Feng, Haiyan Zou
  • Patent number: 9973104
    Abstract: A power module includes a substrate, a first sub-module, a second sub-module and a circuit board. The semiconductor switches and the diodes of the first sub-module and the second sub-module are embedded within insulation layers. Consequently, the first sub-module and the second sub-module are formed as a high-voltage-side switching element and a low-voltage-side switching element of a bridge circuit. The first sub-module and the second sub-module are disposed on a first surface of the substrate. An electrode of the first sub-module and some electrodes of the second sub-module are electrically connected with corresponding conducting parts of a circuit board. A heat sink is disposed on a second surface of the substrate.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: May 15, 2018
    Assignee: DELTA ELECTRONICS, INT'L (SINGAPORE) PTE LTD
    Inventors: Yiu-Wai Lai, Da-Jung Chen
  • Patent number: 9894719
    Abstract: A driver includes a semiconductor chip, a bridge rectifier, and a current driver. The semiconductor chip includes a rectifying diode and a constant current source formed thereon. The bridge rectifier includes the rectifying diode. The current driver includes the first constant current source to provide a constant current.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: February 13, 2018
    Assignee: Epistar Corporation
    Inventors: Chih-Shu Huang, Chang-Hseih Wu, Min-Hsun Hsieh
  • Patent number: 9868358
    Abstract: A power conversion system includes a DC-DC converter, a voltage detector, a current detector and a controller. The controller controls the DC-DC converter such that the DC-DC converter starts outputting power when the output voltage detected by the voltage detector is below a predetermined voltage and stops outputting the power when the output current detected by the current detector is below a reference current that corresponds to the conversion efficiency being larger than or equal to a predetermined conversion efficiency. The reference current is determined as a current value at which the conversion efficiency is decreased to be lower than the predetermined conversion efficiency when the output current exceeds the current value. The controller includes a limiting means that limits the output current not to exceed the reference current while the DC-DC converter is outputting the power.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: January 16, 2018
    Assignee: DENSO CORPORATION
    Inventor: Toshiyuki Kono
  • Patent number: 9837828
    Abstract: A wireless power supply system includes: a wireless power transmitting device configured to include a variable resonant circuit having a variable-controllable resonant frequency characteristic, and to transmit electric power wirelessly via the variable resonant circuit; a power transmission control unit configured to variably control the resonant frequency characteristic of the variable resonant circuit; and a plurality of wireless power receiving devices configured to include respective unique resonant circuits having respective unique resonant frequency characteristics which are different to each other, and to wirelessly receive power from the wireless power transmitting device by a magnetic field resonance mode arising as a result of the unique resonant circuit tuning to a resonant frequency of the variable resonant circuit.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: December 5, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Akiyoshi Uchida
  • Patent number: 9793261
    Abstract: A power semiconductor device includes: a first MOSFET having a first conductivity type including a first source, a first drain, and a first gate; a second MOSFET having a first conductivity type including a second drain, a second source electrically coupled to the first source, and a second gate electrically coupled the first gate; and a diode being coupled between the first and second drains.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: October 17, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masaaki Takiguchi, Katsuhisa Kawasaki
  • Patent number: 9712047
    Abstract: A power factor controller is disclosed, in which error feedback is provided my means of a parallel combination of at least two error feedback channels. By providing at least two error feedback channels, the stability associated with, for instance, a continuously integrated feedback loop with relatively long time constant, may be combined with a fast transient response associated with, for instance, a sample-and-hold error feedback. A method of operating such a power factor controller is also disclosed.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: July 18, 2017
    Assignee: NXP B.V.
    Inventors: Cheng Zhang, Frans Pansier, Peter Theodorus Johannes Degen
  • Patent number: 9705417
    Abstract: A rectifier includes a larger Field Effect Transistor (FET1) and a smaller FET (FET2). A sense resistor is in series with FET2's body diode between a cathode terminal and an anode terminal. If the cathode terminal voltage is greater than the voltage on the anode terminal, then body diodes of FETs are reverse biased, the FETs are controlled to be off, and there is no current flow through the rectifier. If, however, the voltage on the anode terminal becomes positive with respect to the cathode terminal, then the body diode of FET2 starts to conduct and there is a voltage drop across the sense resistor. A comparator detects this condition and turns both FETs on. The rectifier is then conductive, so current can flow from the anode terminal, through the larger FET1, and to the cathode terminal, with a small forward voltage drop and without passing across the sense resistor.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: July 11, 2017
    Assignee: IXYS Corporation
    Inventors: Anatoliy V. Tsyrganovich, Leonid A. Neyman
  • Patent number: 9692318
    Abstract: A synchronous rectifier, which rectifies an alternating voltage signal as an input signal and/or forwards a dc voltage signal as an input signal for use as an output signal. Included is a rectifying unit composed of at least one controllable switch element; a smoothing unit, which is connected to the rectifying unit and smooths the signal rectified or forwarded by the rectifying unit, in order to provide a smoothed signal for use as output signal; a control logic, which controls the rectifying unit based on the input signal and the output signal coming from the smoothing unit.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: June 27, 2017
    Assignee: Endress + Hauser GmbH + Co. KG
    Inventors: Tobias Paul, Niels Donkers, Juan Angel Alonso-Schonlau, Klaus Ruf
  • Patent number: 9692246
    Abstract: A power bank device has an input connector, an output connector, a DC-to-DC switching converter, a plurality of battery cells coupled together in series, and novel light load detection circuitry. The power bank device is operable in a discharging mode in which the battery cells power the DC-to-DC converter, and the converter drives a regulated DC voltage onto the output connector. The detection circuitry detects whether a light load condition exists in which only a small amount of current is being output onto the output connector. If the condition is detected, then the converter is disabled so that current flow out of the output connector is stopped. In one example, the condition is detected by supplying a constant current onto the output connector and detecting whether the voltage on the output connector rises and stays above a predetermined voltage for a predetermined amount of time.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: June 27, 2017
    Assignee: Active-Semi, Inc.
    Inventor: Hong Mao
  • Patent number: 9692312
    Abstract: A power conversion apparatus includes a rectifier, a converter including a reactor, a switching element, and a reverse current prevention element, a smoothing capacitor configured to smooth the output voltage, a current detector configured to detect a reactor current, a voltage detector configured to detect the output voltage, and a converter control unit configured to control operation of the switching element of the converter. The converter-control unit includes a switching command calculation unit configured to calculate a switching command value responsive to a ratio of the rectified voltage to the output voltage in accordance with the output voltage and the reactor current, a switching control unit configured to control operation of the switching element in accordance with the switching command value, and a supply abnormality determination unit configured to determine occurrence of a momentary power failure or voltage sag in accordance with the switching command value.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: June 27, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenta Yuasa, Shinsaku Kusube, Akihiro Tsumura, Takuya Shimomugi
  • Patent number: 9673728
    Abstract: A converter arrangement can include a first rectifier having an AC input and a DC output with two DC output poles, a capacitance (C) connected between the DC output poles of the first rectifier, a second rectifier having an AC input with two AC input poles and a DC output with two DC output poles, wherein the DC output of the second rectifier is connected between the DC output poles of the first rectifier. A magnetic amplifier includes at least one control winding (L2) and at least one AC winding (L11, L12), wherein the at least one control winding is connected between the DC output poles of the first rectifier, and wherein the at least one AC winding (L2) of the magnetic amplifier is connected in series with the AC input of the second rectifier.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: June 6, 2017
    Assignee: ABB Technology Oy
    Inventors: Markku Talja, Veikko Hakala
  • Patent number: 9634514
    Abstract: A rectification and regulation circuit for a wireless power receiver includes a coil, a full-wave rectifier circuit and a control unit. The full-wave rectifier has a first pair of controllable rectifiers including a first transistor connected to a first terminal of the coil and a second transistor connected to a second terminal of the coil. The control unit is operable to control switching of the transistors of the full-wave rectifier so that the full-wave rectifier (a) generates a rectified output for charging a battery of the wireless power receiver by rectifying current through the coil or voltage across the coil and (b) regulates the rectified output.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: April 25, 2017
    Assignee: Infineon Technologies Austria AG
    Inventor: Darryl Tschirhart
  • Patent number: 9595835
    Abstract: A method for manufacturing and operating a semiconductor device is disclosed. The semiconductor device includes a first capacitor node, a second capacitor node, a first capacitor electrode, a second capacitor electrode, a first switch and a second switch. The first switch is coupled between the first capacitor electrode and the first and second capacitor nodes such that the first switch has a first position that couples the first capacitor electrode to the first capacitor node and a second position that couples the first capacitor electrode to the second capacitor node. The second switch is coupled between the second capacitor electrode and the first and second capacitor nodes such that the second switch has a first position that couples the second capacitor electrode to the first capacitor node and a second position that couples the second capacitor electrode to the second capacitor node.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: March 14, 2017
    Assignee: Infineon Technologies AG
    Inventors: Karl-Heinz Allers, Reiner Schwab
  • Patent number: 9577546
    Abstract: An AC-DC power converter is provided with two pairs of self-driven synchronous rectifier switches in addition to, or in place of, diode bridge rectifiers for boosting efficiency and reducing cost. An AC sensing circuit is coupled to AC input terminals, and a DC level shifting circuit applies a DC offset to an AC input signal received via the sensing circuit. A comparator circuit determines positive and negative half waves of the AC input signal relative to the DC offset value. Gate drive signals are provided for driving a first set of parallel rectifier switches during a positive half cycle of the AC input signal, and for driving a second and opposing pair of parallel rectifier switches during a negative half cycle of the AC input signal. In an embodiment, high side gate drive signals may be electrically isolated from the active rectifier control circuitry.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: February 21, 2017
    Assignee: PAI CAPITAL LLC
    Inventors: Andrej Teren, Marian Vranka, Martin Pietka, Lee Tai Keung
  • Patent number: 9577542
    Abstract: The present invention discloses a constant on-time isolated converter comprising a transformer with a primary side and a secondary side. The primary side is connected to an electronic switch and secondary-side is connected to a load and a processor. The processor is connected to a driver on primary side through at least one coupling element and to the electronic switch. The processor receives an output voltage or an output current across the load generating a control signal accordingly. The driver receives the control signal through the coupling element and accordingly changes the ON/OFF state of the electronic switch, regulating the output voltage and the output current via the transformer, where the duration of the ON/OFF state of the electronic switch is determined between the moment control signal changes from negative to positive and the moment it changes from positive to negative to achieve a high-speed load transient response.
    Type: Grant
    Filed: December 7, 2014
    Date of Patent: February 21, 2017
    Assignee: Alpha & Omega Semiconductor (Cayman), Ltd.
    Inventors: Tien-Chi Lin, Chih-Yuan Liu, Yung-Chuan Hsu, Pei-Lun Huang
  • Patent number: 9520777
    Abstract: A time signal generator and a time generating method used in a power converter are provided. The time generating method includes following steps. An error delay signal is generated according to an error signal, wherein the error signal is related to an output voltage of the power converter. A time signal is generated according to the error signal and the error delay signal. The time signal may serve to improve a response speed of the power converter.
    Type: Grant
    Filed: April 30, 2014
    Date of Patent: December 13, 2016
    Assignee: uPI Semiconductor Corp.
    Inventor: Ya-Ping Chen
  • Patent number: 9444247
    Abstract: An apparatus and method of protecting a power receiver of a wireless power transmission system are provided. A wireless power receiver includes a rectifier comprising an input and an output, and configured to receive a signal through the input, to rectify the signal to produce a rectified signal, and to output the rectified signal through the output, and a capacitor connected to the output of the rectifier and to ground. The wireless power receiver further includes a direct current-to-direct current (DC/DC) converter connected to the output of the rectifier and to a load, and configured to convert the rectified signal to a power, and to provide the power to the load, and a device configured to create a short circuit to protect the rectifier and/or the capacitor when a voltage greater than a threshold voltage is applied to the input of the rectifier and/or the output of the rectifier.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: September 13, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Zo Kim, Sang Wook Kwon, Ki Young Kim, Nam Yun Kim, Yun Kwon Park, Eun Seok Park, Young Ho Ryu, Chang Wook Yoon, Jin Sung Choi, Young Tack Hong
  • Patent number: 9431895
    Abstract: An SMPS received a rectified periodic input line voltage and is configure to provide a regulated output. A power switch has a constant turn-on time in a given cycle of the rectified periodic input line voltage. A maximum value of the envelope of peak currents through the power switch is determined and is compared with a reference value, and the power switch turn-on time in the next cycle is adjusted accordingly. The output of the power supply is regulated to a target output value, and the current is in phase with the periodic input line voltage, resulting in a high power factor. No sampling of the line voltage is needed to maintain the high power factor. A controller chip can have as few as five pins. Alternatively, a seven-pin controller chip can have two external resistors for selecting operations in either Boundary Conduction Mode (BCM) or Discontinuous Conduction Mode (DCM).
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: August 30, 2016
    Assignee: Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.
    Inventors: Na Liu, Zeqiang Chen, Yajiang Zhu, Jianhua Duan, Chao Deng, Zhimin Hu, Siyuan Xu
  • Patent number: 9389659
    Abstract: A power supply system for an information handling system is provided. The information processing system is electrically coupled to an AC power source and includes at least one computer unit. The power supply system includes: at least one AC power supply unit electrically coupled to the at least one computer unit and the AC power source; at least one DC power supply unit electrically coupled to the at least one computer unit; and a backup power unit electrically coupled to the at least one DC power supply unit. In response to the at least one AC power supply unit not supplying power, the at least one DC power supply unit supplies power to the at least one computer unit. A data center having the power supply system is further provided.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: July 12, 2016
    Assignee: International Business Machines Corporation
    Inventors: Jung-Tai Chen, Wei-Tien Chen, George Cheng, Chih-Chiang Chiu, Chin-Yu Huang, JunHom Lin, W. J. Tseng
  • Patent number: 9306464
    Abstract: A synchronous rectifying control circuit of a power converter is provided. The synchronous rectifying control circuit comprises a synchronous rectifying driver, a charge pump capacitor, and a capacitor. The synchronous rectifying driver is coupled to a transformer for generating a control signal to switch a transistor. The charge pump capacitor is coupled to a power source for generating a charge pump voltage. The capacitor is coupled to store the charge pump voltage. The transistor is coupled to the transformer and operated as a synchronous rectifier. The charge pump voltage is coupled to guarantee a sufficient driving capability for the control signal.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: April 5, 2016
    Assignee: SYSTEM GENERAL CORPORATION
    Inventors: Ta-Yung Yang, Chou-Sheng Wang
  • Patent number: 9274491
    Abstract: The discharge circuit includes plural resistors connected in parallel to a capacitor and connected between input lines. When input of an alternative voltage has stopped, the plural resistors form plural discharge paths to remove charges accumulated in the capacitor, thereby removing the charges in the capacitor connected between the input lines of the alternative voltage.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: March 1, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shinichiro Matsumoto
  • Patent number: 9257901
    Abstract: In a DC power supply circuit, a first period and a second period are alternately repeated a plurality of times during each half cycle of AC supplied to the DC power supply circuit. The first period is a period during which current flows along a first current path extending from an output terminal at a high-potential side of a rectifier circuit to an output terminal at a low-potential side of the rectifier circuit, via an inductor and a switching element. The second period is a period during which current flows along a second current path extending from the output terminal at the high-potential side of the rectifier circuit to the output terminal at the low-potential side of the rectifier circuit, via the inductor, a charging current supply path, and a capacitor.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: February 9, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kazushige Sugita, Kazuhiko Itoh, Masanobu Murakami
  • Patent number: 9190847
    Abstract: A power distribution system includes a DC-DC converter which outputs a DC power after converting the DC power outputted from a DC power source to a desired voltage level. In the power distribution system, the DC-DC converter is controlled so as to operate only when the input voltage falls in a predetermined range.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: November 17, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hideki Tamura, Takuya Kagawa, Hiroaki Koshin
  • Publication number: 20150145452
    Abstract: A power converting circuit for supplying power to an inductive load, includes an inductance, a switching circuit and an energy saving circuit. The inductance is charged when the switching circuit is conductive and discharges energy to the energy saving circuit and the inductive load when the switching circuit is nonconductive. The energy saving circuit discharges energy to the inductive load when the switching circuit is conductive.
    Type: Application
    Filed: November 28, 2014
    Publication date: May 28, 2015
    Inventors: Chi Ping SUN, Fei XIN, Xiu Wen YANG, Shing Hin YEUNG, Yun Long JIANG, Yan Yun CUI
  • Publication number: 20150145453
    Abstract: A power conversion circuit for supplying power to an inductive load, includes a switching circuit and an energy saving circuit. The inductive load is supplied with electrical power and the energy saving circuit is charged when the switching circuit is conductive, and the inductive load is disconnected from the electrical power supply and the energy stored in the energy saving circuit is discharged to the inductive load when the switching circuit is nonconductive.
    Type: Application
    Filed: November 28, 2014
    Publication date: May 28, 2015
    Inventors: Chi Ping SUN, Fei XIN, Xiu Wen YANG, Shing Hin YEUNG, Yun Long JIANG, Yan Yun CUI