For Phase Shift Or Control Patents (Class 323/212)
  • Patent number: 10345766
    Abstract: According to an embodiment, server includes estimator, condition setter, calculator, receiver, and controller. Estimator estimates an energy demand in building where electrical apparatuses are equipped based on apparatus data. Condition setter sets energy consumption suppression conditions. Calculator calculates operation schedule of apparatuses which can optimize an energy balance in building based on the demand and condition. Receiver receives DR signal including energy consumption suppression condition. Controller controls the apparatuses based on operation schedule calculated based on the condition corresponding to that included in the DR signal.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: July 9, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Dai Murayama, Masaaki Saito, Masahiko Murai, Yutaka Iino
  • Patent number: 10284098
    Abstract: A load current adjusting circuit can include: a counter configured to generate first and second digital signals in accordance with a pulse signal, where a numerical relationship between the first and second digital signals is determined in accordance with a duty cycle of the pulse signal; and an adjusting circuit configured to adjust a load current to vary along with the duty cycle of the pulse signal in accordance with the first and second digital signals.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: May 7, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Limin Yu
  • Patent number: 10243246
    Abstract: A phase shifter is formed by providing a branchline coupler having a pair of phase adjusting sections. Each one of the phase adjusting sections is coupled to a corresponding one of a pair of shunt transmission line sections of the branchline coupler. Each one of the pair of phase adjusting sections includes: first and second conductive pads are disposed on the surface of a substrate having a gap between them; one of the pads being connected to a ground plane conductor on a bottom surface of the substrate. A series of conductive layer segment is sequentially written on the surface of the substrate in the gap electrically connected to sidewalls of the first and second pads. Phase shift through the phase shifter is measured after each one of the segments is written. The writing process is terminated when the measuring detects a predetermined phase shift through the phase shifter.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 26, 2019
    Assignee: Raytheon Company
    Inventors: Christopher M. Laighton, Susan C. Trulli, Elicia K. Harper
  • Patent number: 9941833
    Abstract: Provided is a converter for an HEV system. The converter includes a PCB, a PWM (IC) mounted on the PCB to output a plurality of PWM signals including a first PWM signal and a second PWM signal, a plurality of MOSFETs mounted on the PCB, the plurality of MOSFETs including a first MOSFET, which performs a switching operation according to the first PWM signal, and a second MOSFET which performs a switching operation according to the second PWM signal, and a plurality of inductors including a first inductor, which is magnetized according to the switching operation of the first MOSFET to operate in one phase, and a second inductor which is magnetized according to the switching operation of the second MOSFET to operate in other one phase.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: April 10, 2018
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Soo Bin Hwang
  • Patent number: 9859791
    Abstract: A method for charge-reuse, the method may include performing multiple repetitions of the steps of: operating a second capacitive load while the second capacitive load is disconnected from a first capacitive load; wherein the second capacitive load is a Microelectromechanical systems (MEMS) capacitive load or a Nanoelectromechanical systems (NEMS) capacitive load; electrically coupling a first capacitive load to a second capacitive load via a path that comprises an inductor; charging the first capacitive load with a second charge provided from the second capacitive load; electrically disconnecting the first capacitive load, the second capacitive load and the inductor from each other; feeding the inductor with a supply current provided by a supply circuit; disconnecting the inductor from the supply circuit and coupling the inductor to the first capacitive load; charging the first capacitive load by the inductor; electrically coupling the first capacitive load to the second capacitive load via the path that comp
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: January 2, 2018
    Assignee: DSP GROUP LTD.
    Inventor: Moshe Haiut
  • Patent number: 9761165
    Abstract: A display apparatus includes a power supply for providing power, a circuit board including an integrated circuit (IC) with a central processing unit (CPU) that processes an image signal; and a display configured to display an image corresponding to the image signal; the IC includes a power controller configured to monitor a voltage level of a core voltage provided by the power supply to the IC and adjust a phase margin of a voltage corresponding to a voltage detected by the monitoring. Thus, a phase margin may be adjusted in accordance with a voltage of an IC, thereby compensating for voltage fluctuation due to instantaneously varying ripples and thus stably driving a system.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: September 12, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Jea-hee Han
  • Patent number: 9755521
    Abstract: A control circuit for an interleaved switching power supply having a plurality of parallel coupled power stage circuits, can include: a feedback circuit that receives an output voltage of the interleaved switching power supply, and generates an output voltage feedback signal; a ripple generator that receives a plurality of switching control signals, and generates an AC ripple signal having a frequency that is N times a switching frequency; an adder circuit that adds the output voltage feedback signal with the AC ripple signal, and generates a superposition signal; a comparison circuit that receives the superposition signal and a reference voltage, and generates a comparison signal; and a frequency divider circuit that divides the comparison signal into a plurality of turn on control signals configured to control turn on of a plurality of main power switches in the plurality of power stage circuits.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: September 5, 2017
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Yongbin Cai, Shengjun Chen
  • Patent number: 9729062
    Abstract: A flyback converter has a sub-nanofarad capacitor disposed between the primary winding and the secondary winding of a transformer included in the flyback converter. A controller in the flyback converter co-optimizes the switch period and width such that the flyback converter operates substantially at peak efficiency via the use of a novel set point and control-signal. A model of global optimal control is provided via a novel characterization and analysis method.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: August 8, 2017
    Assignee: Maxout Renewables, Inc.
    Inventor: Eric Bryant Cummings
  • Patent number: 9698691
    Abstract: A switching DC-to-DC converter has an adaptive duty cycle limiting circuit with an inductor current sensor to generate a sense signal indicative of magnitude of the inductor current. A replica signal is generated from the sense signal and transferred through a replica parasitic resistance circuit. A differential voltage is developed across the replica parasitic resistances and compared with a maximum limit voltage level. The maximum limit voltage level is indicates that a gain level of the switching DC-to-DC converter has decreased even though the duty cycle has increased. A duty cycle limit signal is generated and transferred to disable a switch in a switching circuit for limiting the duty cycle of the switching DC-to-DC converter, when the gain level has decreased such that the switching DC-to-DC converter does not enter a region where the gain of the switching DC-to-DC converter has a negative slope.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: July 4, 2017
    Assignee: Dialog Semiconductor (UK) Limited
    Inventors: Kemal Ozanoglu, Selcuk Talay, Pier Cavallini, Naoyuki Unno, Louis deMarco
  • Patent number: 9577529
    Abstract: An energy harvesting circuit is based on a switch mode inductive DC-DC converter circuit. The inductor current is sensed and a duration of an on-time is controlled in dependence on the sensed inductor current. A duration of an overall switching period of the converter circuit is controlled in dependence on an on-time set by a first timing control circuit and input and output voltages. This converter circuit enables independent control of the on-time and a full period of a converter cycle. Very rapid switching can be avoided which can give rise to very high energy consumption. The full cycle period can be set to achieve a desired constant value of an input resistance of the DC-DC converter, and thereby maximize power transfer.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: February 21, 2017
    Assignee: Stichting IMEC Nederland
    Inventor: Stefano Stanzione
  • Patent number: 9037884
    Abstract: In accordance with one embodiment of the present disclosure, a multi-phase voltage regulator may comprise a plurality of phases, each phase configured to supply electrical current to one or more information handling resources electrically coupled to the voltage regulator. A controller may be electrically coupled to the plurality of phases. The controller may designate at least one of the plurality of phases as a first state phase, and designate each of the plurality of phases not designated as a first state phase as a second state phase. The controller may alternate the designation of at least two of the plurality of phases between a first state phase and a second state phase. Each first state phase may be configured to supply a first electrical current regardless of electrical current demand. Each second state phase may be configured to supply a second electrical current based on the current demand.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: May 19, 2015
    Assignee: Dell Products L.P.
    Inventors: Johan Rahardjo, John Breen, Shiguo Luo
  • Patent number: 8930723
    Abstract: In accordance with one embodiment of the present disclosure, a multi-phase voltage regulator may comprise a plurality of phases, each phase configured to supply electrical current to one or more information handling resources electrically coupled to the voltage regulator. A controller may be electrically coupled to the plurality of phases. The controller may designate at least one of the plurality of phases as a first state phase, and designate each of the plurality of phases not designated as a first state phase as a second state phase. The controller may alternate the designation of at least two of the plurality of phases between a first state phase and a second state phase. Each first state phase may be configured to supply a first electrical current regardless of electrical current demand. Each second state phase may be configured to supply a second electrical current based on the current demand.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: January 6, 2015
    Assignee: Dell Products L.P.
    Inventors: Johan Rahardjo, John Breen, Shiguo Luo
  • Patent number: 8547072
    Abstract: A phase control apparatus includes a first transistor whose source or emitter is connected to one end of an AC power supply and whose drain or collector is connected to one end of a load, a second transistor whose source or emitter is connected to the other end of the AC supply and whose drain or collector is connected to the other end of the load, a diode bridge that rectifies an AC voltage of the AC supply, and a parallel circuit of a zener diode and a capacitor. The parallel circuit generates a high potential relative to a bridge negative output terminal potential, or generates a low potential relative to a bridge positive output terminal potential. First and second transistor control terminal potentials are switched between the high and the bridge negative output terminal potentials, or between the low and the bridge positive output terminal potentials.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: October 1, 2013
    Assignee: Maeda Metal Industries, Ltd.
    Inventor: Takayoshi Obatake
  • Patent number: 8531136
    Abstract: Exemplary apparatus and associated methods involve a bypass module for modulating conductivity of one or more current paths to provide a first set of LEDs that are conducting near minimum output illumination and having a larger conduction angle than that of a second set of LEDs that conduct at a maximum output illumination. In an illustrative example, the conductivity of a bypass path in parallel with a portion of the second set of LEDs may be reduced while the AC input excitation is above a predetermined threshold voltage or current. The bypass path may be operated to provide a reduced effective turn-on voltage while the input excitation is below the predetermined threshold. For a given maximum output illumination at a maximum input excitation, the bypass module may control current through selected LEDs to construct an input current waveform with substantially improved power factor and reduced harmonic distortion.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: September 10, 2013
    Assignee: Once Innovations, Inc.
    Inventor: Zdenko Grajcar
  • 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: 8502481
    Abstract: A positive counter starts counting, starting with an initial value, upon receiving a positive edge of a dimming pulse signal. A negative edge counter starts counting, starting with an initial value, upon receiving a negative edge of the dimming pulse signal. For each i-th (2?i?n) channel, the phase shift amount is calculated by multiplying a period count value that indicates the period of the dimming pulse signal by (i?1)/n. When the count value matches the phase shift amount, a burst control signal is switched to a first level. When the count value matches the phase shift amount, the burst control signal is switched to a second level.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: August 6, 2013
    Assignee: Rohm Co., Ltd.
    Inventors: Junichi Hagino, Shingo Haruta, Toshikazu Takei
  • Patent number: 8466627
    Abstract: Devices (1) have branches (20,30) for receiving AC voltages. First branches (20) comprise first light-emitting diode circuits (21) and first arrangements for phase-shifting first currents flowing through the first light-emitting diode circuits (21) with respect to the AC voltages. Second branches (30) comprise second light-emitting diode circuits (31) and do not comprise second arrangements for phase-shifting second currents flowing through the second light-emitting diode circuits (31) with respect to the AC voltages. As a result, an overall flicker index of the device (1) will be smaller than individual flicker indices of the light-emitting diode circuits (21,31). The first arrangements may comprise capacitors (22) coupled serially to the first light-emitting diode circuits (21). The branches (20,30) may further comprise resistors (23,33) coupled serially to or forming part of the light-emitting diode circuits (21,31).
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: June 18, 2013
    Assignee: Koninklijke Philips N.V.
    Inventor: Harald Josef Gunther Radermacher
  • Patent number: 8384361
    Abstract: An active phase angle correction circuit which corrects the phase angle between voltage and current in an AC supply varies the capacitive loading of the AC mains to reduce the phase angle to near zero by detecting the phase angle, reactively and resistively loading the AC mains in steps until the phase angle is at a desired level close to zero, and then maintaining or incrementally adjusting the loading. The applied loading may be continuously switched in and out at a rate much greater than the mains supply frequency.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: February 26, 2013
    Assignee: Advanced Environmental Technologies Limited
    Inventor: Mohamed Sirajuddin
  • Publication number: 20120299560
    Abstract: In one embodiment, a temperature compensation circuit is used in a peak current control multi-phased DC/DC converter. Each phase has a duty cycle needed to generate a regulated output voltage of the converter. The temperature for each phase in the converter is sensed to generate corresponding first signals for all the phases. The first signals are averaged to generate a second signal corresponding to the average temperature of all the phases. For each phase, a third signal is generated corresponding to the difference between the first signal and the second signal. The third signal is then used to adjust the duty cycle of each phase to control the temperature of each phase to be substantially equal to the average temperature. In the steady state, the output voltage of the converter will be the desired voltage and the temperatures of the phases will be balanced.
    Type: Application
    Filed: May 25, 2011
    Publication date: November 29, 2012
    Applicant: LINEAR TECHNOLOGY CORPORATION
    Inventor: Yiding Gu
  • Patent number: 8248439
    Abstract: A backlight controller for driving multiple light emitting diode (LED) strings includes feedback circuitry, phase array circuitry, and encoder circuitry. The feedback circuitry generates multiple feedback signals indicative of currents flowing through the LED strings respectively. The encoder circuitry generates a code signal indicative of a total number of operative LED strings among the multiple LED strings based on the feedback signals. The phase array circuitry generates multiple saw tooth signals according to the code signal. A phase shift amount between two adjacent signals of the saw tooth signals is determined by the total number of the operative LED strings. The phase array circuitry compares each of the saw tooth signals with a dimming control signal to generate multiple phase shift signals so as to respectively control the operative LED strings.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: August 21, 2012
    Assignee: O2Micro, Inc
    Inventors: Kaiping Ran, Da Liu, Yung Lin Lin
  • Publication number: 20120194144
    Abstract: A method of maintaining balance in power systems is provided herein. The method comprises of detecting a need for load switch from a source phase to a target phase; then applying a Direct Current (DC) conversion to the target phase, to yield a DC representation of the target phase; then synthesizing the DC representation of the target phase to yield synthesized source phase; then, conveying specified amount of load from the source phase to the synthesized source phase; then, repeatedly advancing, in each cycle, the phase of the synthesized source phase until it breaches the phase of target phase. The advancing is carried out in a rate of up to a standard error deviation that complies with electricity standard and conveying a load from the synthesized source phase to the target phase.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 2, 2012
    Inventors: Erez KOREN, Michael VYSOTSKY, Alexander GUSINSKY
  • Patent number: 8232779
    Abstract: A method for selecting the optimum number of phases for a converter is provided, which selects a duty range using an input voltage and an output voltage, obtains ripple values for multiple phases in the duty range, and selects the optimum number of phases using the corresponding ripple values. The method for selecting the optimum number of phases for a converter includes a duty range selection step of selecting a duty range using an input voltage and an output voltage, a ripple value calculation step of obtaining ripple values for multiple phases within the selected duty range, a range ripple selection step of selecting one or more phases in the duty range, and a rated ripple selection step of selecting the phases having the minimum ripple value in a rated duty among the phases selected in the range ripple selection step.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: July 31, 2012
    Assignee: Sungkyunkwan University Foundation for Corporate Collaboration
    Inventors: Byoung-Kuk Lee, Jong-Soo Kim, Gyu-Yeong Choe
  • Patent number: 8214677
    Abstract: A system is disclosed. The system includes a central processing unit (CPU) to operate in one or more low power sleep states, and a power converter. The power converter includes phase inductors; and one or more power switches to drive the phase inductors. The one or more power switches are deactivated during the CPU sleep state.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: July 3, 2012
    Assignee: Intel Corporation
    Inventors: Edward Burton, Robert Greiner, Anat Deval, Doug Huard
  • Patent number: 8212535
    Abstract: Disclosed is a toroidal core current transformer comprising a primary conductor which penetrates the toroidal core and a secondary winding that is wound around the toroidal core. A measuring shunt (RSh) or a load (Zb) is provided at the secondary end. In order to compensate the phase error (f) between the primary current (IP) and the secondary current (Is), a compensation circuit (K) whose capacity (C) is measured substantially according to equation (I) or (II) is provided at the secondary end. In equation (I) or (II), C represents the capacity of the compensation circuit, ? represents the radian frequency, ? represents the phase error between the primary current and the secondary current, Rsh represents the resistance of an optional measuring shunt, and Zb represents the impedance of an optional load.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: July 3, 2012
    Assignee: Trench France SAS
    Inventors: Ruthard Minkner, Joachim Schmid, Rolf Fluri
  • Patent number: 8125207
    Abstract: A method for operating a voltage regulator controller, for use in a voltage regulator including coupled inductors, is provided as follows. A first signal is generated for driving a first switch of the voltage regulator. A second signal is generated driving a first switch of the voltage regulator. The voltage regulator determines whether a light-load condition exists. Upon determining the existence of a light-load condition, adjusting the phase difference between said first and second signals so that the first and second signals are approximately in-phase.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: February 28, 2012
    Assignee: Intersil Americas Inc.
    Inventors: Michael J. Houston, Christopher S. Saunders
  • Patent number: 8115408
    Abstract: A light source apparatus and a light source adjusting module are provided. The light source apparatus includes a power supply, a phase modulator, an electrical transformer, a light source adjusting module and a light-emitting device. The power supply provides a first AC voltage signal. The phase modulator receives the first AC voltage signal and adjusts a conducting phase of the first AC voltage signal to generate a modulated AC voltage signal. The electrical transformer transforms the modulated AC voltage signal to generate a second AC voltage signal. The light adjusting module generates a luminance adjusting signal according to a state of the second AC voltage signal. The light-emitting device receives the luminance adjusting signal to generate a corresponding light source.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: February 14, 2012
    Assignee: Novatek Microelectronics Corp.
    Inventors: Yi-Te Liu, Chih-Jen Yen, Chih-Yuan Hsieh, Lan-Shan Cheng
  • Patent number: 8022646
    Abstract: Information indicative of the placement of spindle motor components may be obtained and used to provide a correction to one or more BEMF-derived attributes used to control the spindle speed. In some implementations, first and second signals indicative of BEMF of different stator windings may be used to determine a speed-related characteristic. The speed related characteristic may be used to determine an error amount, which may be used to determine a correction factor to control the speed of the spindle motor.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: September 20, 2011
    Assignee: Marvell International Ltd.
    Inventors: Pantas Sutardja, Jerry Richgels
  • Publication number: 20110169462
    Abstract: A converter device for power conversion in e.g. a power plant such as a wind turbine is disclosed. The converter device is configured for converting an input power to an electrical output power. The converter device may be configured for receiving mechanical input power or, according to another embodiment, may be configured for receiving electrical input power. The converter device includes a controller which is configured for setting a phase angle between a voltage and a total current of the electrical output power to a predetermined value if the voltage indicated by the voltage signal is outside a predetermined voltage band.
    Type: Application
    Filed: January 13, 2011
    Publication date: July 14, 2011
    Inventors: Björn Andresen, Steffen Wulff
  • Patent number: 7962248
    Abstract: Methods of reducing peak electrical demand at a single customer location of an electrical service provider during at least one time interval during a day can include shifting the activation of a first electrical appliance located at the single customer location from the at least one time interval during a day to a second time interval during which a second electrical appliance is not activated for at least part of the second time interval. Related systems, circuits, and computer program products are disclosed.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: June 14, 2011
    Inventor: Daniel Flohr
  • Publication number: 20110133704
    Abstract: A method is provided for controlling turn-on of phases of a multiphase regulator. According to the method, there are tested the conditions necessary for the turn-on of a phase to be turned-on indicated by a first cell of the phase register, and in response to a positive result a corresponding ramp signal is reset. There is then tested the conditions necessary for the turn-on of a phase successive to the phase to be turned on according to the list of priorities of the phase register, and corresponding ramp signals are reset if there is a positive result. In response to no positive results of testing conditions necessary for the turn-on of all phases successive to the phase to be turned on, there is reset a ramp signal corresponding to a phase successive to a last turned on phase indicated by a last cell of the phase register.
    Type: Application
    Filed: June 10, 2010
    Publication date: June 9, 2011
    Applicant: STMicroelectronics S.r.I
    Inventors: Osvaldo Enrico Zambetti, Alessandro Zafarana
  • Patent number: 7952309
    Abstract: A rotating electrical machine control device includes an inverter; a resolver; a unit; a three-phase/two-phase modulation switching unit; and a motor control unit that switches to a two-phase modulation in a specific region where an electric noise given to the resolver by a rotating electrical machine is large, even in a region where the modulation ratio is smaller than the three-phase/two-phase modulation switching boundary.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: May 31, 2011
    Assignee: Aisin A W Co., Ltd.
    Inventors: Keisuke Nishimura, Masuho Sakakibara, Yoshinari Nakagawa, Yoshinori Oono
  • Publication number: 20110091233
    Abstract: A method and an apparatus to control power supplied to a heating roller and a phase control circuit corresponding to the method or the apparatus. The phase control circuit may include an examination unit to compare levels of a sine wave having a predetermined first period and a switching signal to increase and decrease repeatedly according to a predetermined second period, and a phase control signal generation unit to generate a phase control signal having a non-zero in intervals of time sections including a time when levels of the switching signal and the sine wave which is in a decreasing section are equal to each other during a time period when the level of the sine wave is zero, and a time when levels of the switching signal and the sine wave which is in an increasing section are equal to each other during a time period when the level of the sine wave is zero.
    Type: Application
    Filed: December 27, 2010
    Publication date: April 21, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Tae-kwon NA, Young-min Chae
  • Patent number: 7923974
    Abstract: A power supply system includes multiple power converter phases. A controller (e.g., a processor device) monitors energy delivery for each of multiple power converter phases that supply energy to a load. The controller analyzes the energy delivery associated with each of the multiple power converter phases to identify an imbalance of energy delivered by the multiple power converter phases to the load. Based on the analyzing and detection of an imbalance condition, the controller modifies a future order of activating the multiple power converter phases for powering the load. Accordingly, a single phase of a multiphase switching power converter may be prevented from becoming overloaded while delivering energy to power the load.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: April 12, 2011
    Assignee: CHiL Semiconductor Corporation
    Inventors: Gary D. Martin, Robert T. Carroll
  • Patent number: 7920942
    Abstract: A microsource is provided, which includes an energy storage device, a power generation device, and a controller. The energy storage device is operably coupled for power transfer to a load through a first power bus. The power generation device is operably coupled for power transfer to the load through a second power bus. The controller determines a mode of operation for the energy storage device and the power generation device based on an energy level of the energy storage device and on the load; determines minimum power set points and maximum power set points for the energy storage device and the power generation device based on the determined mode of operation, on a storage output power measured at the first power bus, and on a generation output power measured at the second power bus; and controls an output power of the energy storage device and an output power of the power generation device based on the determined minimum and maximum power set points.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: April 5, 2011
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Robert H. Lasseter, Paolo Piagi
  • Patent number: 7906924
    Abstract: Methods and systems are provided for controlling a discretely commutated, multi-phase DC electric motor or actuator is used. The methods and systems may be used for motor or actuator applications where accurate, high resolution torques may be need over a relatively wide range. The methods and systems provide alternative means of selecting the magnitudes of currents to be driven into the motor windings.
    Type: Grant
    Filed: January 21, 2008
    Date of Patent: March 15, 2011
    Assignee: Honeywell International Inc.
    Inventor: James C. Fischer
  • Patent number: 7871420
    Abstract: A phacoemulsification system includes a phacoemulsification handpiece including a cutting tip ultrasonically vibrated by an ultrasonic transducer. A power supply is provided for driving the ultrasonic transducer at a resonant frequency of the transducer and cutting tip and varying power to the transducer, in response to loading of the cutting tip, by phase shifting voltage and current supplied to the transducer.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: January 18, 2011
    Assignee: Abbott Medical Optics Inc.
    Inventors: David L. Anderson, Nate G. Elsen, Michael W. Fellinger, Pravin V. Mehta
  • Publication number: 20100283436
    Abstract: Reducing, suppressing or canceling parallel parasitic capacitance and/or resistive effects that affect the frequency response of components, elements and/or circuits in an electronic circuit or system that exhibit inductance is disclosed. Noise generated by parallel parasitic capacitance and/or parasitic resistance of the components, the physical orientation of the components, and/or the layout of components, devices and/or conductive tracks (board traces) on printed circuit boards within an electronic circuit or system is reduced, suppressed or canceled. The reduction, suppression or cancelation is achieved by adding a current source in parallel with a part or component of the electronic circuit or system that exhibits inductance, the current source being adapted to deliver a compensating current of roughly equal magnitude and roughly opposite phase to parasitic current associated with the part or component.
    Type: Application
    Filed: May 5, 2009
    Publication date: November 11, 2010
    Applicant: CITY UNIVERSITY OF HONG KONG
    Inventors: Henry Shu Hung CHUNG, Wai To YAN
  • Publication number: 20100283437
    Abstract: Reducing, suppressing or canceling series parasitic inductance and/or resistive effects that affect the frequency response of components, elements and/or circuits in an electronic circuit or system that exhibit capacitance is disclosed. Noise generated by series parasitic inductance and/or parasitic resistance of the components, the physical orientation of the components, and/or the layout of components, devices and/or conductive tracks (board traces) on printed circuit boards within an electronic circuit or system is reduced, suppressed or canceled. The reduction, suppression or cancellation is achieved by adding a voltage source in series with a part or component of the electronic circuit or system that exhibits capacitance, the current source being adapted to deliver a compensating voltage of roughly equal magnitude and roughly opposite phase to parasitic voltage associated with the part or component.
    Type: Application
    Filed: May 5, 2009
    Publication date: November 11, 2010
    Applicant: CITY UNIVERSITY OF HONG KONG
    Inventors: Henry Shu Hung CHUNG, Wai To YAN
  • Patent number: 7808216
    Abstract: Disclosed is a phase shift circuit. The phase shift circuit comprises a frequency multiplier outputting a square wave signal by frequency-multiplying a reference signal, a frequency synchronizer receiving the square wave signal to output a triangle wave signal, and a PWM nodule receiving the triangle wave signal to output a phase-shifted multi-channel control signal.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: October 5, 2010
    Assignee: LG Innotek Co., Ltd.
    Inventor: Taek Soo Kim
  • Publication number: 20100219799
    Abstract: Disclosed is a toroidal core current transformer comprising a primary conductor which penetrates the toroidal core and a secondary winding that is wound around the toroidal core. A measuring shunt (RSh) or a load (Zb) is provided at the secondary end. In order to compensate the phase error (f) between the primary current (IP) and the secondary current (Is), a compensation circuit (K) whose capacity (C) is measured substantially according to equation (I) or (II) is provided at the secondary end. In equation (I) or (II), C represents the capacity of the compensation circuit, ? represents the radian frequency, ? represents the phase error between the primary current and the secondary current, Rsh represents the resistance of an optional measuring shunt, and Zb represents the impedance of an optional load.
    Type: Application
    Filed: February 17, 2006
    Publication date: September 2, 2010
    Applicant: Trench Switzerland AG
    Inventors: Ruthard Minkner, Joachim Schmid, Rolf Fluri
  • Publication number: 20100166447
    Abstract: A system for delivering desired magnitudes of AC power to a load. A three-cycle power mode includes a 1st and 3rd cycle in which either no AC power, or full power, is delivered to the load, and a 2nd cycle in which an AC switch is triggered at a desired phase angle to deliver the desired increments of AC power during the 2nd cycle. AC power is delivered in each cycle in a manner to provide a net zero DC offset in the AC current delivered to the load. A two-cycle mode can be achieved by using the 1st and 2nd cycle, or by using the 2nd and 3rd cycles to optimize power delivery performance. A multi-cycle power delivery system can employ both the three-cycle and the two-cycle modes together to minimize the harmonic content during delivery of various power levels.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 1, 2010
    Inventors: William Paul Cook, Michael Charles Day, Wesley David McIntire
  • Patent number: 7729808
    Abstract: A system for making real-time predictions about an arc flash event on an electrical system is disclosed. The system includes a data acquisition component, an analytics server and a client terminal. The data acquisition component is communicatively connected to a sensor configured to acquire real-time data output from the electrical system. The analytics server is communicatively connected to the data acquisition component and is comprised of a virtual system modeling engine, an analytics engine and an arc flash simulation engine. The arc flash simulation engine is configured to utilize the virtual system model to forecast an aspect of the arc flash event.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: June 1, 2010
    Assignee: EDSA Micro Corporation
    Inventors: Adib Nasle, Ali Nasle
  • Patent number: 7693608
    Abstract: A system for filtering and interpreting real-time sensory data from an electrical system is disclosed. The system includes a data acquisition component, a power analytics server and a client terminal. The data acquisition component acquires real-time data output from the electrical system. The power analytics sewer is comprised of a virtual system modeling engine, an analytics engine, and a decision engine. The virtual system modeling engine generates predicted data output for the electrical system. The analytics engine monitors real-lime data output and predicted data output of the electrical system. The decision engine compares the real-time data output against the predicted data output to filter out and interpret indicia of electrical system health and performance. The client terminal is communicatively connected to the power analytics server and configured to display the filtered and interpreted indicia.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: April 6, 2010
    Assignee: EDSA Micro Corporation
    Inventor: Adib Nasle
  • Publication number: 20100039078
    Abstract: Provided is a load fluctuation compensation circuit for compensating a power source voltage supplied to an operation circuit, the load fluctuation compensation circuit including: a periodic signal changing section that receives a power source voltage from a power source shared with the operation circuit, and outputs a changed signal resulting from changing a supplied periodic signal according to the power source voltage; a phase comparator that compares a phase of the periodic signal with a phase of the changed signal outputted from the periodic signal changing section; an initializing section that generates a bias voltage supplied to the periodic signal changing section and adjusts a phase difference between the periodic signal and the changed signal to a preset value, based on the comparison result of the phase comparator; a controller that holds the bias voltage outputted from the initializing section when the phase difference between the periodic signal and the changed signal has become the preset value;
    Type: Application
    Filed: February 13, 2009
    Publication date: February 18, 2010
    Applicant: ADVANTEST CORPORATION
    Inventor: Masakatsu SUDA
  • Publication number: 20090179619
    Abstract: A method and system control the adding or dropping of phases in a multiphase voltage regulator. The regulator has an efficiency and this efficiency of the regulator is calculated for a given number of phases being activated from an output voltage, input voltage, output current, and duty cycle of the regulator. The efficiency of the regulator is also calculated if a phase is added using the derivative of the duty cycle as a function of the output current. The efficiency of the regulator is further calculated if a phase is dropped using the derivative of the duty cycle as a function of the output current. From these operations of calculating, a phase is either added, dropped, or the phase is maintained at its current value to thereby optimize the efficiency of the regulator.
    Type: Application
    Filed: December 12, 2008
    Publication date: July 16, 2009
    Applicant: Intersil Americas Inc.
    Inventor: Michael Jason Houston
  • Patent number: 7561451
    Abstract: In a power converter apparatus, such as an uninterruptible power supply, a phase reference signal is generated responsive to a DC voltage on a DC bus. A magnitude reference signal may be generated responsive to a phase current of an AC bus and/or the DC voltage on the DC bus. Power is transferred between the AC and DC busses responsive to the phase reference signal and the magnitude reference signal. Generation of the phase reference signal may include generating a DC voltage error signal responsive to the DC voltage on the DC bus, generating a phase offset signal responsive to the DC voltage error signal, and generating the phase reference signal responsive to the phase offset signal. Generation of the magnitude reference signal may include generating a volt-amperes reactive (VAR) error signal responsive to the phase current and generating the magnitude reference signal responsive to the VAR error signal.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: July 14, 2009
    Assignee: Eaton Corporation
    Inventors: John G. Tracy, Hans-Erik Pfitzer, Keith Bauman
  • Publication number: 20090134833
    Abstract: In various embodiments, a phase current sampling apparatus (300, 600, FIGS. 3, 6), an electric motor drive system (100, FIG. 1), and a motor vehicle (1200, FIG. 12) include switching circuitry adapted to receive first and second phase current waveforms. The switching circuitry provides the first phase current waveform during at least two offset sampling instants, and provides the second phase current waveform during a reference sampling instant. An analog-to-digital converter is adapted to sample the first phase current waveform at the offset sampling instants, and to sample the second phase current waveform at the reference sampling instant. An embodiment of a method for regulating phase current waveforms includes an analog-to-digital converter generating samples of a first phase current waveform at sampling instants that occur before and after a reference sampling instant, and generating a sample of a second phase current waveform at the reference sampling instant.
    Type: Application
    Filed: November 26, 2007
    Publication date: May 28, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: STEPHEN T. WEST, BRIAN A. WELCHKO, STEVEN E. SCHULZ, SILVA HITI
  • Publication number: 20080264923
    Abstract: Provided is a welding system and method for controlling a welding system with an improved waveform. In accordance with one aspect of the present invention, a welding system waveform is calibrated such that the welding transfer regularly occurs during short circuits, comprising applying a voltage and a current to a welding electrode, applying an increased voltage and an increased current to the welding electrode, increasing the current to the welding electrode when a short circuit is detected, and maintaining the increased current applied to the welding electrode until a desired time expires after the short circuit is detected or until the short circuit clears, whichever occurs first.
    Type: Application
    Filed: April 23, 2008
    Publication date: October 30, 2008
    Applicant: Illinois Tool Works Inc.
    Inventor: Galen Jon White
  • Patent number: 7342372
    Abstract: The invention relates to a method for power control of an electric motor, in particular a motor for driving the suction fan of a vacuum cleaner connected to an AC mains power supply. The power control is effected by varying the phase angle of the electric alternating quantity supplied to the motor by the use of semiconductor switches. AC power supplied to the motor is switched by using different delay times for the switching in each half-period of a full AC period to suppress odd harmonics, particularly the third harmonic of the mains power line frequency. Half-periods of a full period are mirrored in the next consecutive full period in order to suppress even harmonics, particularly the second harmonic of the mains power line frequency. A set of delay times t1 and t2 are defined and selected to be used in further avoiding critical delay time areas for harmonics and minimize the generation of vibrations.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: March 11, 2008
    Assignee: Aktiebolaget Electrolux
    Inventors: Stefan Jonsson, Jonas Beskow
  • Patent number: 7204921
    Abstract: A vacuum apparatus which can easily regenerate plasma is provided. A matching box used in the vacuum apparatus can vary the impedance thereof by varying the magnitudes of the inductance of variable inductance elements. Controlling the magnitude of direct current makes it possible to control the magnitudes of inductance of the variable inductance elements so that it is possible to carry out matching operation at high speed.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: April 17, 2007
    Assignee: ULVAC Inc.
    Inventors: Taro Yajima, Minoru Akaishi, Yoshikuni Horishita