For Semiconductor Rectifier Patents (Class 363/48)
  • Patent number: 10271389
    Abstract: Converters (1) comprise switches (14) for in response to control signals controlling amplitudes of converter output signals and comprise control loops for in response to detections of the amplitudes of the converter output signals producing the control signals. The control loops comprise circuits (21-23) for in response to simple detections of the amplitudes counting a first number of first time-intervals for which the amplitudes are above or below reference amplitudes, for transforming counting results into the control signals having control values, and for in response to the first number of first time-intervals being equal to/larger than a reference number overruling the control values and producing control signals having first or second limit values. Complex detections of the amplitudes are no longer necessary.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: April 23, 2019
    Assignee: SIGNIFY HOLDING B.V.
    Inventor: Andrew Ulrich Rutgers
  • Patent number: 9979281
    Abstract: A power converter is configured to increase bandwidth in response to a magnitude of the difference between the target output voltage and the actual output voltage. The converter includes a subtractor to receive a reference voltage and a scaled output as inputs, configured to produce an error as output, a functional block configured to receive the error as input and to produce a functional block output, a first multiplier configured to receive the functional block output and scale the functional block output by a first loop constant, and a second multiplier configured to receive the functional block output and scale the functional block output by a second loop constant. The functional block is configured to increase the error value fed to the first multiplier and the second multiplier by a factor f(x).
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: May 22, 2018
    Assignee: Excelitas Technologies Corp.
    Inventor: Neil Symonds
  • Patent number: 9670897
    Abstract: A control system for controlling an operation of a hydroelectric turbine. The control system comprises a converter system to convert AC power, supplied by a generator connected to the turbine, and having a voltage and frequency that is a function of a rotational speed of the turbine, to AC power having a voltage and frequency of a transmission system for transmitting the AC power to a receiving station. The system further comprises a control unit that is arranged to co-operate with the converter system to adjust the AC voltage supplied by the generator in response to a water flow speed through the turbine to thereby control rotation of the turbine. The converter system comprises a first-stage converter and a second-stage converter, with a DC link provided between the first and second-stage converters. The first-stage converter is arranged to convert the AC power supplied by the generator to DC power.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: June 6, 2017
    Assignee: Openhydro IP Limited
    Inventors: Edward Spooner, Simon Cawthorne, Wee Keong Khoo
  • Patent number: 9638160
    Abstract: A hydroelectric turbine array system comprises an array of turbine systems and a supervisory controller. Each turbine system of the array comprises a hydroelectric turbine and a control system. The control system includes a converter system arranged to convert AC power, supplied by a generator connected to the hydroelectric turbine and having a voltage and frequency that is a function of a rotational speed of the hydroelectric turbine, to AC power having a voltage and frequency of a transmission system for transmitting the AC power to a receiving station and a control unit co-operable with the converter system to adjust the AC voltage supplied by the generator.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: May 2, 2017
    Assignee: Openhydro IP Limited
    Inventors: Edward Spooner, Simon Cawthorne, Wee Keong Khoo
  • Patent number: 9621020
    Abstract: A control circuit for controlling a switching device having a first terminal, a second terminal, and a control terminal is disclosed. The control circuit includes a first diode for coupling to the first terminal of the switching device, a second diode for coupling to the second terminal of the switching device, a first transistor for coupling to the control terminal of the switching device, and a second transistor coupled to the second diode. The first transistor is coupled to the first diode. The control circuit is configured to allow current flow in only one direction between the first and second terminals of the switching device.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: April 11, 2017
    Assignee: ASTEC INTERNATIONAL LIMITED
    Inventors: Zong Bo Hu, Ying Qu, Kevin Donald Wildash, Wai Kin Chan, Wing Ling Cheng
  • Patent number: 9543881
    Abstract: A rotary electric machine driving device that drives and controls an alternating-current rotary electric machine, the rotary electric machine driving device including: an inverter that is electrically interposed between a direct-current power supply and the rotary electric machine, and converts electric power between a direct current and an alternating current; a smoothing capacitor that is electrically interposed between the direct-current power supply and the inverter, and is connected between a positive pole and a negative pole on a direct-current side of the inverter; and an inverter control unit that controls switching of a switching element of the inverter according to a predefined switching frequency.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: January 10, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Yasuhiko Kobayashi
  • Patent number: 9541053
    Abstract: A control system for controlling an operation of a hydroelectric turbine. The control system comprises a converter system to convert AC power, supplied by a generator connected to the turbine, and having a voltage and frequency that is a function of a rotational speed of the turbine, to AC power having a voltage and frequency of a transmission system for transmitting the AC power to a receiving station. The system further comprises a control unit that is arranged to co-operate with the converter system to adjust the AC voltage supplied by the generator in response to a water flow speed through the turbine to thereby control rotation of the turbine. The converter system comprises a first-stage converter and a second-stage converter, with a DC link provided between the first and second-stage converters. The first-stage converter is arranged to convert the AC power supplied by the generator to DC power.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: January 10, 2017
    Assignee: Openhydro IP Limited
    Inventors: Edward Spooner, Simon Cawthorne, Wee Keong Khoo
  • Patent number: 9349528
    Abstract: A power supply arrangement for an electricity meter includes an input, a full wave rectifier, and a voltage doubler circuit. The input is configured to receive a periodical input signal. The full wave rectifier is coupled to the input and has a first output. The first output is coupled to a first load of the electricity meter. The voltage doubler circuit is coupled to the input and has a second output coupled to a second load of the electricity meter. The voltage doubler is configured to prevent the flow of current from the second output to the input.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: May 24, 2016
    Assignee: Landis+Gyr, Inc.
    Inventors: John Voisine, Raj Sundaram
  • Patent number: 9192001
    Abstract: A capacitance based reactive power balancing current limited power supply (RPBCLPS) for driving floating DC loads utilizes capacitive reactance to limit current being supplied to a load, rather than inductance. A capacitor transfers charge from an AC current input to a DC load. A fuse electrically protects the capacitor from high frequency current harmonics. A diode clamp electrically protects the capacitor from voltage spikes. A rectifier converts the AC current input into DC current for driving the DC load. The reactive power balancing current limited power supply can be incorporated as a key component into reactive power balancing electrical power distribution systems. Such systems can comprise a grid configuration structured to distribute the AC electrical power from a utility source to a plurality of DC loads. Further, the DC loads can be cooperatively located to provide functional distributed capacitance throughout a substantial portion of the grid.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: November 17, 2015
    Assignee: Ambionce Systems LLC.
    Inventor: Dale B. Stepps
  • Patent number: 9184591
    Abstract: This invention relates to a multiple phase electrical system, including: a first and a second electrical lane, each lane having a generator and a load connected by a bus system, and a rectifier between the generator and load; and, a transformer connected between the two lanes, the transformer having a plurality of power windings across each of which corresponding phases of the first and second lanes are connected, and a plurality of phase shift windings.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: November 10, 2015
    Assignee: ROLLS-ROYCE PLC
    Inventors: David Reginald Trainer, Konstantinos Kampisios, Omar Jasim
  • Patent number: 9143030
    Abstract: A passive power factor correction (PFC) circuit is disclosed. It converts an AC input voltage into at least one DC output voltage. A diode bridge and a diode pair rectify the AC input voltage and provide first and second rectified voltages, respectively. A resistor applies the second rectified voltage to a first capacitor that stores the first voltage. A diode applies the first voltage to an inductor. The inductor applies the first rectified voltage to an output capacitor that stores the DC output voltage. The passive PFC circuit is intended to expand commonly used full-wave bridge rectifier and following storage capacitor. It can replace an input circuit, including low pass filter, in many applications even if improved power factor is not required. The passive PFC specifically targets size of the inductor while avoiding any switching, and maintaining power factor that challenges active PFC circuits. Early prototypes reached power factor of 0.99 while driving a 100 W load.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: September 22, 2015
    Assignee: TELEDYNE REYNOLDS, INC.
    Inventors: Jeff Gucyski, Victor Chen, George Panagotacos
  • Patent number: 9137933
    Abstract: A refrigeration apparatus includes: an electrical circuit (10) including a power device (14); a refrigerant jacket (30) which is thermally connected to the power device (14), and in which a refrigerant for a refrigeration cycle flows; a refrigerant pipe (20) which carries the refrigerant flowing in the refrigerant jacket (30), and forms a current path (20a, 20b) for grounding the refrigerant jacket (30); and a magnetic body (90) which is attached to the current path (20a, 20b), and generates a predetermined impedance in the current path (20a, 20b).
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: September 15, 2015
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventor: Yoshitsugu Koyama
  • Patent number: 9117588
    Abstract: A combination converter arrangement and a switching device including such a combination converter arrangement are disclosed. The combination of a current transformer with a core made of ferromagnetic material and a Rogowski coil is referred to as a combination converter, the current transformer being used to supply energy to the electronic tripping unit of the switching device, and the Rogowski coil being used to measure current. In order to make use of the installation space available in the switching device for installing combination converters, a plurality of combination converters are arranged in a common housing to thereby provide a multi-pole combination converter module.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: August 25, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Markus Gross, Thomas Kiendl
  • Patent number: 8995153
    Abstract: The disclosure relates to a passive power factor correction circuit. The passive power factor correction circuit comprises: a filtering device being used for decreasing high order harmonic of an input current; a resonance device being coupled to the filtering device for controlling operation time of the input current; and a suppression device being coupled to the resonance device for suppressing ripple of the input current.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: March 31, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Po-Yen Chen, Ching-Tsai Pan
  • Publication number: 20150070949
    Abstract: A power transfer system for transferring power from a first circuit to a second circuit by a differential signal generated in the first circuit includes a first isolation element for transmitting a first component of the differential signal between the first and second circuits. The system also includes a second isolation element for transmitting a second component of the differential signal between the first and second circuits. A digital rectifier is coupled to the first and second isolation elements for generating a rectified voltage in response to the first and second components of the differential signal. The system includes circuitry for monitoring the rectified voltage and generating a signal representative of the rectified voltage. The system also includes a controller for changing the rectified voltage in response to the signal representative of the rectified voltage.
    Type: Application
    Filed: September 8, 2014
    Publication date: March 12, 2015
    Inventors: Rajarshi Mukhopadhyay, Mark W. Morgan
  • Patent number: 8813346
    Abstract: A coil-type electronic component has a coil inside or on the surface of its base material and is characterized in that: the base material is constituted by a group of grains of a soft magnetic alloy containing iron, silicon and other element that oxidizes more easily than iron; the surface of each soft magnetic alloy grain has an oxide layer formed on its surface as a result of oxidization of the grain; this oxide layer contains the other element that oxidizes more easily than iron by a quantity larger than that in the soft magnetic alloy grain; and grains are bonded with one another via this oxide layer.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: August 26, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Hideki Ogawa, Atsushi Tanada, Hitoshi Matsuura, Kiyoshi Tanaka, Hiroshi Kishi, Kenji Kawano
  • Patent number: 8789262
    Abstract: A method for manufacturing an inductor includes a mold device having a mold cavity, disposing a coil member above the mold cavity of the mold device, filling metallic particles into the mold cavity of the mold device, forcing the coil member into the metallic particles to form a base member, applying two conductive coating members onto the base member and electrically connecting to the terminals of the coil member respectively, and attaching two conductive coverings onto the conductive coating members respectively and electrically connecting to the conductive coating members respectively for allowing the inductors to be quickly manufactured in a mass production.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: July 29, 2014
    Assignee: Mag. Layers Scientific Technics Co., Ltd.
    Inventor: Chien Chih Liu
  • Publication number: 20140204634
    Abstract: A power supply apparatus capable of setting a ripple current to be not more than an acceptable value regardless of an input voltage is obtained. The apparatus calculates switching frequency by a current detected by a current detector so that the switching frequency is set to be low if the current is large and the switching frequency is set to be high if the current is small. The switching frequency is set to be high if the input voltage is high and switching frequency is set to be low if the input voltage is low depending on a voltage inputted to an input terminal; and a switching element is controlled by restricting the switching frequency so that the switching frequency to be set by the current detected by the current detector is not lower than the switching frequency to be set by the input voltage.
    Type: Application
    Filed: March 21, 2014
    Publication date: July 24, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: TORU DAIGO, NOBUHIRO KIHARA, NAOKI ITOI
  • Patent number: 8707547
    Abstract: A lead-frameless power inductor and its fabrication method are disclosed. The power inductor comprises a lower substrate, a coil provided on the lower substrate, and an intermediate layer which encloses the coil, wherein the lower substrate can be a soft magnetic entrainer or a non-magnetic entrainer. The coil is made of an insulated wire, and the intermediate layer is a colloid consisting of magnetic powder. A method for fabricating the lead-frameless power inductor includes steps of preparing a lower substrate; forming a plurality of conducting metal layers on the lower substrate; forming a wire package on an upper surface of said lower substrate; coating a surface of said wire package with a magnetic powder; dividing the substrate into a plurality of granulated elements by cutting process; and forming the conducting metal layer on both sides of the element to form a surface mounting device.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: April 29, 2014
    Assignee: Inpaq Technology Co., Ltd.
    Inventor: Wei Chih Lee
  • Publication number: 20140112034
    Abstract: A three-phase interleave converter with a TSSC includes: a filter circuit, a PFC circuit, a star connection between the filter circuit and the PFC circuit, and a second capacitor 7; where an output end of the filter circuit is connected to an input end of the PFC circuit by using a conducting wire; the star connection is set on the conducting wire connecting the filter circuit and the PFC circuit; one end of the star connection is connected to the conducting wire and the other end of the star connection is connected to one end of the second capacitor 7; and the other end of the second capacitor 7 is connected to an input wire. By using the foregoing solution, the number of capacitors is reduced from the original three to one. Therefore, fewer capacitors are used, and the volume is further reduced, thereby increasing the power density.
    Type: Application
    Filed: November 22, 2013
    Publication date: April 24, 2014
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Shaohua WANG, Zhikai WEN
  • Publication number: 20140104901
    Abstract: A system for filtering electromagnetic interference (EMI) includes a power source that provides alternating current (AC) power; a load; an active rectifier that converts AC power from the power source to direct current (DC) power for the load; and a filter connected between the power source and the active rectifier, wherein the filter comprises at least one notch filter that filters selected frequencies of EMI generated by the active rectifier.
    Type: Application
    Filed: October 11, 2012
    Publication date: April 17, 2014
    Applicant: HAMILTON SUNDSTRAND CORPORATION
    Inventor: Vietson M. Nguyen
  • Patent number: 8601673
    Abstract: A method of producing an inductor with high inductance includes forming a removable polymer layer on a temporary carrier; forming a structure including a first coil, a second coil, and a dielectric layer on the removable polymer layer; forming a first magnetic glue layer on the removable polymer layer and the structure; removing the temporary carrier; and forming a second magnetic glue layer below the structure and the first magnetic glue layer.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: December 10, 2013
    Assignee: Cyntec Co., Ltd.
    Inventor: Shih-Hsien Tseng
  • Patent number: 8593837
    Abstract: Provided is a power supply device for an image forming apparatus, the power supply device including: a filter unit filtering alternating current (AC) power from an AC power source; and a converter generating a direct current (DC) power from the filtered AC power, wherein the filter unit includes: a capacitor connected to the AC power source; a discharge device connected to the capacitor and discharging electric charges accumulated in the capacitor; and a switching device switching connection between the capacitor and the discharge device according to a power supply mode of the power supply device.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: November 26, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hyung-Won Hong
  • Patent number: 8531142
    Abstract: A bi-power motor controlling apparatus, which is electrically connected with a motor, includes a driver IC having a first pin and a second pin. The first and second pins are used to receive a first power and a second power, respectively, from outside. The second power is supplied to the driver IC, and the first power is supplied to the motor for controlling the rotational speed of the motor.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: September 10, 2013
    Assignee: Delta Electronics, Inc.
    Inventors: Ming-Lung Liu, Chun-Chia Lu, Chia-Feng Wu, Chun-Lung Chiu
  • Patent number: 8468837
    Abstract: A high efficiency thermoelectric cooling system and method is described. The cooling system has a thermoelectric module having a semi-conductor body sandwiched in contact between a pair of thermally conductive plates. A smooth continuous variable output direct current source supplies the semi-conductor body to attenuate thermal stress in the conductive plates due to temperature differential fluctuation across the plates. Current flow in the semi-conductor body transfers heat from one plate to the other plate. A cold heat sink absorbs heat from the cold plate. A heat convection assembly, including a hot heat sink, evacuates heat from the hot plate. The thermoelectric cooling device is secured to a wall of an insulated enclosure. An air convection housing may b provided to evacuate heat from the hot heat sink using an outside air supply or ambient air supply.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: June 25, 2013
    Inventor: Claude Pinet
  • Patent number: 8427853
    Abstract: A power factor correction converter includes a diode bridge that rectifies an alternating-current voltage input from an alternating-current input power supply Vac, a series circuit including an inductor and a switching element, a rectifying smoothing circuit connected in parallel with the switching element and including a diode and a smoothing capacitor, and a digital signal processing circuit that controls turning on and off of the switching element such that the input current input from the alternating-current input power supply Vac comes to have a similar shape to the alternating-current voltage. The current flowing through the inductor in the off period of the switching element is detected by using a current detection resistor, the operation mode is determined on the basis of the inductor current IL at a predetermined timing and the switching element is optimally controlled in accordance with the operation mode.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: April 23, 2013
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Yoshiyuki Uno
  • Patent number: 8407883
    Abstract: A damascene process is utilized to fabricate the segmented magnetic core elements of an integrated circuit inductor structure. The magnetic core is electroplated from a seed layer that is conformal with a permanent dielectric mold that results in sidewall plating defining an easy magnetic axis. The hard axis runs parallel to the longitudinal axis of the core and the inductor coils are orthogonal to the core's longitudinal axis. The magnetic field generated by the inductor coils is, therefore, parallel and self-aligned to the hard magnetic axis. The easy axis is enhanced by electroplating in an applied magnetic field parallel to the easy axis.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: April 2, 2013
    Assignee: National Semiconductor Corporation
    Inventors: Peter Smeys, Peter Johnson, Andrei Papou
  • Publication number: 20130077361
    Abstract: This disclosure provides systems, methods, and apparatus for filtering of a rectifier in a wireless power receiver. In one aspect a wireless power receiver is provided. The wireless power receiver includes a rectifier circuit configured to provide direct-current (DC) based at least in part on a time-varying voltage generated via a wireless field provided from a wireless power transmitter. The wireless power receiver further includes a band-stop filter circuit configured to filter an output of the rectifier circuit and electrically isolate a capacitor from the rectifier circuit at an operating frequency.
    Type: Application
    Filed: March 30, 2012
    Publication date: March 28, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Zhen Ning Low, Sreenivas Kasturi, Xuanning Gao
  • Patent number: 8375566
    Abstract: Methods of providing arc resistant switchgear enclosures for dry-type transformers are provided. The enclosures have one or more arc-resistant features, including arc channels, arc fault dampers, and arc fault plenums. In a preferred embodiment, the method comprises providing a base structure with a dry-type transformer seated thereon, providing walls and a roof, wherein at least the front wall contains at least one longitudinal seam covered by an arc channel.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: February 19, 2013
    Assignee: ABB Inc.
    Inventors: Robert C. Ballard, Nathan T. Sigman, Edgar A. Wimmer, Jr., Rafael Gutierrez, Jr.
  • Patent number: 8307534
    Abstract: A method of forming an encapsulated coupled coil arrangement. The method includes coupling a first lead of a first coil to a second lead of an electrical circuit device, by soldering or infusion, using a superconductive jointing alloy; and encapsulating the first coil, the electrical circuit device and the jointed leads of the first coil and the electrical circuit device in an encapsulation material. The jointing alloy has a melting point higher than a highest temperature experienced by the encapsulation material having the encapsulation process.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: November 13, 2012
    Assignee: Siemens Plc
    Inventors: Graham Hutton, M'Hamed Lakrimi, Adrian Mark Thomas
  • Patent number: 8302287
    Abstract: A multilayer inductor includes a bottom magnetic layer having an external conductive pattern formed on a bottom surface thereof for connection to a substrate such as a printed circuit board. The bottom external conductive pattern includes signal/power contacts and first and second inductor electrodes. A top magnetic layer includes a top external conductive pattern having signal/power contacts and inductor electrode contacts. An inductor conductive pattern formed on the top surfaces of intermediate magnetic layers disposed between the top and bottom magnetic layers are electrically coupled to each other by means of through holes to form a spiral inductor element.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: November 6, 2012
    Assignee: Alpha and Omega Semiconductor Incorporated
    Inventors: Jun Lu, François Hébert
  • Publication number: 20120268972
    Abstract: A power supply apparatus capable of setting a ripple current to be not more than an acceptable value regardless of an input voltage is obtained. The apparatus calculates switching frequency by a current detected by a current detector so that the switching frequency is set to be low if the current is large and the switching frequency is set to be high if the current is small. The switching frequency is set to be high if the input voltage is high and switching frequency is set to be low if the input voltage is low depending on a voltage inputted to an input terminal; and a switching element is controlled by restricting the switching frequency so that the switching frequency to be set by the current detected by the current detector is not lower than the switching frequency to be set by the input voltage.
    Type: Application
    Filed: September 2, 2011
    Publication date: October 25, 2012
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Toru DAIGO, Nobuhiro KIHARA, Naoki ITOI
  • Patent number: 8215003
    Abstract: A method of fabricating a reactor composed of a coil, a core, and a container, capable of suppressing the core to break when a current flows in the coil to generate magnetic flux. In the method, the coil is formed by spirally winding a conductive wire. The coil is immersed in an insulating film in liquid with electrical insulation. The coil is placed in a furnace. Annealing for the coil and thermosetting for the insulating film are performed at a temperature within 250 to 320° C. for a period of time within 30 minutes to one hour before forming the core in the container. The coil is then disposed in the container. Inside and outside areas of the coil in the container is filled with a resin mixture composed of magnetic powder and resin. The resin mixture in the container is hardened to form the core.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: July 10, 2012
    Assignees: Denso Corporation, NEC Tokin Corporation
    Inventors: Kenji Saka, Yousuke Setaka, Hiroyuki Katsuta, Takashi Yanbe
  • Patent number: 8209849
    Abstract: A method of A production method including interdiffusion of a Ni component in a magnetic layer and a Zn component in a nonmagnetic sheet to form an interdiffusion layer in a region of the nonmagnetic sheet inside a conductive pattern. This method allows the interdiffusion layer to be formed without need for complicated processing of the nonmagnetic sheet. Furthermore, there is no boundary region between the magnetic layer and the nonmagnetic sheet around it. The nonmagnetic layer is located between turns of a coiled conductor to suppress degradation of dc bias characteristics and a magnetic body penetrates in a region inside the coiled conductor to suppress reduction in inductance due to provision of the nonmagnetic layer between turns of the coiled conductor.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: July 3, 2012
    Assignee: TDK Corporation
    Inventors: Hidekazu Sato, Masazumi Arata, Kunio Oda, Yoshimitsu Satoh
  • Patent number: 8205324
    Abstract: A damascene process is utilized to fabricate the segmented magnetic core elements of an integrated circuit inductor structure. The magnetic core is electroplated from a seed layer that is conformal with a permanent dielectric mold that results in sidewall plating defining an easy magnetic axis. The hard axis runs parallel to the longitudinal axis of the core and the inductor coils are orthogonal to the core's longitudinal axis. The magnetic field generated by the inductor coils is, therefore, parallel and self-aligned to the hard magnetic axis. The easy axis is enhanced by electroplating in an applied magnetic field parallel to the easy axis.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: June 26, 2012
    Assignee: National Semiconductor Corporation
    Inventors: Peter Smeys, Peter Johnson, Andrei Papou
  • Patent number: 8136222
    Abstract: A method of forming an encapsulated coupled coil arrangement. The method includes coupling a first lead of a first coil to a second lead of an electrical circuit device, by soldering or infusion, using a superconductive jointing alloy; and encapsulating the first coil, the electrical circuit device and the jointed leads of the first coil and the electrical circuit device in an encapsulation material. The jointing alloy has a melting point higher than a highest temperature experienced by the encapsulation material during the encapsulation process.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: March 20, 2012
    Assignee: Siemens Plc
    Inventors: Graham Hutton, M'Hamed Lakrimi, Adrian Mark Thomas
  • Patent number: 8116104
    Abstract: A power supply to improve an EMI characteristic and an electronic device having the power supply. The power supply includes a power converter to convert an alternating current (AC) power applied from outside to a direct current (DC) power, a ground portion to supply a ground power to the power converter and a noise attenuator to reduce noise by blocking a harmonic current generated by a driving of the power converter from passing through the ground portion. Accordingly, the stable ground power can be supplied to the internal elements by avoiding the potential change of the ground power and the noise caused by the flow of the harmonic current can be reduced by shortening the harmonic current path. Therefore, the EMI characteristic can be improved.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: February 14, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Seung-hak Lee
  • Patent number: 8108984
    Abstract: Methods of manufacture of integrated circuit inductors having slotted magnetic material will be described. The methods may employ electro- or electroless plating techniques to form a layer or layers of magnetic material within the slotted magnetic material structure, and in particular those magnetic material layers adjacent to insulator layers.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: February 7, 2012
    Assignee: Intel Corporation
    Inventors: Donald S. Gardner, Gerhard Schrom, Peter Hazucha, Fabrice Paillet, Tanay Karnik
  • Publication number: 20120014144
    Abstract: A power supplying apparatus includes a rectifier and a first electromagnetic interference (EMI) filter. The rectifier receives and rectifies an alternating current (AC) input power for generating a direct current (DC) power. The first EMI filter receives the DC power through a first power input terminal and a first reference input terminal thereof. The first EMI filter filters the DC power for generating a DC output power between a first power output terminal and a first reference output terminal thereof. The first EMI filter includes an inductor module, a first X capacitor, and a first Y capacitor.
    Type: Application
    Filed: January 14, 2011
    Publication date: January 19, 2012
    Inventors: Ming Xu, Chuan-Yun Wang, Chih-Chung Chen
  • Patent number: 8022575
    Abstract: Exemplary embodiments of the present disclosure provide a method and controller for damping multimode electromagnetic oscillations in electric power systems which interconnect a plurality of generators and consumers. The controller for damping such oscillations includes a phasor measurement unit (PMU) and a power oscillation damper (POD) controller. Each oscillating mode signal is damped and then superposed to derive a control signal. A feedback controller is used to feedback the control signal to a power flow control device in the power system.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: September 20, 2011
    Assignee: ABB Research Ltd
    Inventors: Petr Korba, Mats Larsson
  • Patent number: 7978486
    Abstract: A rectifier circuit includes an input terminal that receives an alternating-current signal, a first rectifier circuit that generates a first direct-current voltage from the alternating-current signal, a bias-voltage generating circuit that generates a bias voltage from the first direct-current voltage, and a second rectifier circuit that generates a second direct-current voltage from the alternating-current signal biased with the bias voltage.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: July 12, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiyuki Umeda, Shoji Otaka
  • Patent number: 7921546
    Abstract: A method for making a high current low profile inductor includes forming an inductor element comprising a coil having an open center and an outside surface, the coil also having first and second coil ends, making a dry mixture comprising a dry resin and an insulated dry powdered magnetic powder, and compressing the dry mixture around the outside surface of the coil and within the open center of the coil to create an inductor body without liquefying the dry mixture, whereby the inductor body engages the coil both within the coil open center and also the coil outside surface.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: April 12, 2011
    Assignee: Vishay Dale Electronics, Inc.
    Inventors: Timothy M. Shafer, Brett W. Jelkin
  • Patent number: 7886425
    Abstract: A method of manufacturing a transformer is disclosed. A first bobbin piece, having a first channel and a primary winding section is provided. A second bobbin comprising first and second secondary side plates, plural partition plates, a wall portion, a secondary base having a first pin arranged on a bottom surface of the secondary base, plural secondary winding sections, and a second channel is provided. A second pin is inserted into the second bobbin piece to form a wire-arranging part protruded from the second secondary side plate and an insertion part protruded from the bottom surface of the secondary base. A primary winding coil is wound on the primary winding section, and the first and second terminals of a secondary winding coil are respectively fixed on the first pin and the wire-arranging part. A magnetic core assembly is partially disposed within the first channel and the second channel.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: February 15, 2011
    Assignee: Delta Electronics, Inc.
    Inventors: Tzu-Yang Liu, Ching-Hsien Teng, Hsin-Wei Tsai, Yi-Lin Chen, Bou-Jun Zung, Chia-Hung Pai, Shih-Hsien Chang
  • Patent number: 7881078
    Abstract: A device for transmitting electric power between alternating voltage networks includes converters interconnected by direct current lines and provided each with several six-pulse conversion bridges. The six-pulse conversion bridges of one same converter are capable of being connected to an alternating voltage network associated with the converters via inductances differently phase-shifted. A control unit is provided to energize the valves of the six-pulse conversion bridges. The device is more economical and the converters are interconnected by a plurality of direct current circuits, each direct current circuit being galvanically separated from at least an alternating voltage network.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: February 1, 2011
    Assignee: Siemens AG
    Inventors: Marcos Pereira, Kadry Sadek
  • Patent number: 7849586
    Abstract: A method for making a power inductor comprises providing a first magnetic core comprising a ferrite bead core material, cutting a first cavity and a first air gap in said first magnetic core, and attaching a second magnetic core to said first magnetic core at least one of in and adjacent to said air gap.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: December 14, 2010
    Assignee: Marvell World Trade Ltd.
    Inventor: Sehat Sutardja
  • Patent number: 7843709
    Abstract: A rectifier circuit includes an input terminal that receives an alternating-current signal, a first rectifier circuit that generates a first direct-current voltage from the alternating-current signal, a bias-voltage generating circuit that generates a bias voltage from the first direct-current voltage, and a second rectifier circuit that generates a second direct-current voltage from the alternating-current signal biased with the bias voltage.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: November 30, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiyuki Umeda, Shoji Otaka
  • Patent number: 7841070
    Abstract: A planar transformer or balun device, having small trace spacing and high mutual coupling coefficient, and a method of fabricating the same is disclosed. The method may comprise providing a first and a second inductor on a primary and a second substrate respectively, interleaving at least partially the first inductor with the second inductor, coupling the primary and the secondary substrates to form a unitary structure, and providing electrical contacts to couple the first and second inductors with another device or circuit.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: November 30, 2010
    Assignee: Intel Corporation
    Inventor: Telesphor Kamgaing
  • Patent number: 7836578
    Abstract: A method of fabricating a coil-embedded inductor provides steps for obtaining uniform density of coil-embedded inductor. The cavity of a first die is filled with dust before being flipped, and then filled with dust a second time. The dust in the cavity is pressed only once for improving the density.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: November 23, 2010
    Assignee: Delta Electronics, Inc.
    Inventors: Yu-Lin Hsueh, Cheng-Hong Lee, Yi-Hong Huang
  • Patent number: 7817449
    Abstract: A power supply to improve an EMI characteristic and an electronic device having the power supply. The power supply includes a power converter to convert an alternating current (AC) power applied from outside to a direct current (DC) power, a ground portion to supply a ground power to the power converter and a noise attenuator to reduce noise by blocking a harmonic current generated by a driving of the power converter from passing through the ground portion. Accordingly, the stable ground power can be supplied to the internal elements by avoiding the potential change of the ground power and the noise caused by the flow of the harmonic current can be reduced by shortening the harmonic current path. Therefore, the EMI characteristic can be improved.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: October 19, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Seung-hak Lee
  • Patent number: 7746675
    Abstract: In a power converter having m=two or more channels of power factor correction (PFC) circuits connected in parallel and an electromagnetic interference (EMI) filter connected in series therewith, phase shifts in switching between the respective PFC channels can allow increase of EMI filter corner frequency allowing reduction of size and cost of the EMI filter at some switching frequencies. Asymmetrical phase shifts (other than 360°/m) such as 360°/2m and other phase shifts and variations in m allow increase of EMI filter corner frequency at switching frequencies where symmetrical, 360°/m phase shifts provide no benefit to EMI filter design by providing cancellation or partial cancellation of different harmonics of the switching noise; which cancellation may be arranged to be complementary to the EMI filter function at more than one peak of the noise spectrum. (Such asymmetrical phase shifts do not significantly increase ripple and consequent switching noise).
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: June 29, 2010
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Chuanyun Wang, Ming Xu, Fred C. Lee