Patents Issued in January 29, 2015
  • Publication number: 20150028758
    Abstract: Conventional linear or switched power supplies do not sufficiently meet increased requirements for the lowest possible standby losses in idle current mode or ready mode, or for maintaining the charge in storage capacitors or rechargeable batteries even when said supplies have significantly increased circuit complexity. The proposed schematic diagram provides a solution which, in comparison to prior art, can produce a large-scale reduction in said standby losses using a breakover voltage diode, such as e.g. DIAC, SIDAC, TRISIL, or a glow lamp, which, once the respective breakover voltage or triggering voltage has been reached, repeatedly discharges a high-voltage charging capacitor via the primary winding of a pulse transformer, said capacitor in limiting the alternating current with zero-loss and being continuously re-charged by means of a high-voltage input charging capacitor in the surge and ebb supply voltage phases.
    Type: Application
    Filed: October 3, 2012
    Publication date: January 29, 2015
    Inventor: Hans-Wolfgang Diesing
  • Publication number: 20150028759
    Abstract: An LED lighting system includes a multiple output constant current LED driver and a plurality of LED arrays. The LED driver has AC/DC converter, PFC circuit, DC/DC converter and a plurality of DC/DC modules. The PFC circuit is connected to AC/DC converter, the DC/DC converter is connected to the PFC circuit, and the DC/DC modules are connected to DC/DC converter. The LED arrays are connected to DC/DC modules.
    Type: Application
    Filed: November 6, 2013
    Publication date: January 29, 2015
    Applicant: ATG ELECTRONICS, INC.
    Inventor: YaXi Ni
  • Publication number: 20150028760
    Abstract: A light-emitting diode (LED) luminaire includes a light-emitting part, a rectification unit configured to perform full-wave rectification of an alternating current (AC) voltage to supply a first drive voltage to the light-emitting part, a power factor compensation unit configured to be charged with the first drive voltage during a charge period and supply a second drive voltage to the light-emitting part during a compensation period, and an LED drive controller configured to determine a voltage level of the first drive voltage or the second drive voltage and control sequential driving of the first LED group to the nth LED group according to the determined voltage level, such that at least 60% of the LEDs comprising the light-emitting part emit light during the compensation period. The light-emitting part is configured to emit light by receiving the first drive voltage or the second drive voltage.
    Type: Application
    Filed: July 23, 2014
    Publication date: January 29, 2015
    Inventors: Kang Nyung LEE, Sang Wook Han, Hyun Gu Kang
  • Publication number: 20150028761
    Abstract: A galvanically isolated transformer (59) for energizing a lamp (5) comprises a primary circuit (60) including a half-bridge circuit that has two reciprocally clocked switches (21, 22), and including an LLC resonant circuit (25-27). The transformer (59) further comprises a secondary circuit (30) including an output (35) for supplying energy to the lamp (5). A control device (14) is designed to control the half-bridge circuit in accordance with a control variable (ipeak) detected in the primary circuit (60) in order to adjust a current intensity supplied to the lamp (5) by the secondary circuit (30) to a desired value.
    Type: Application
    Filed: April 15, 2013
    Publication date: January 29, 2015
    Applicant: TRIDONIC GMBH & CO KG
    Inventors: Christoph Vonach, Eduardo Pereira
  • Publication number: 20150028762
    Abstract: A pixel circuit and a method for driving the same, a display panel and a display apparatus are configured to improve the lifespan of the pixel circuit.
    Type: Application
    Filed: November 1, 2013
    Publication date: January 29, 2015
    Inventors: Xiaojing Qi, Wen Tan
  • Publication number: 20150028763
    Abstract: The possibility to emit and detect coded light, whereby data is modulated into the light, is known. According to one aspect of the present disclosure, to reduce the risk of the modulation going undetected due to possible frequency blind spots in the detection spectrum, the lighting device (2a, 2b, 2c) is arranged such that the frequency of its emitted modulated light (3a, 3b, 3c) shivers around a base, or center, frequency. For example the modulated light (3a, 3b, 3c) may be transmitted using pulse-width-modulation, and the resulting pulse-width-modulation light signal (3a, 3b, 3c) may thus have a period that fluctuates around the base period (T). The parameters determining the shivering of the modulated light (3a, 3b, 3c) may be chosen such that visible flicker in the emitted modulated light (3a, 3b, 3c) is avoided. According to another aspect, the lighting device (2a, 2b, 2c) emits with a plurality of different modulation frequencies simultaneously.
    Type: Application
    Filed: January 14, 2013
    Publication date: January 29, 2015
    Inventors: Lorenzo Feri, Stephanus Joseph Johannes Nijssen, Tommaso Gritti, Ruben Rajagopalan, Frederik Jan De Bruijn
  • Publication number: 20150028764
    Abstract: A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as for LED-based light bulbs. The BJT may be switched on and off from a controller coupled to two terminals of the BJT. Through the two terminals, the control IC may dynamically adjust a reverse recovery time period of the BJT. The reverse recovery time period may be adjusted by changing an amount of base charge that accumulates on the BJT. Additional, the reverse recovery may be controlled through the use of a reverse base current source applied to the BJT after beginning switching off the BJT.
    Type: Application
    Filed: July 28, 2014
    Publication date: January 29, 2015
    Inventors: Siddharth Maru, John L. Melanson, Rahul Singh, Eric King, Thirumalai Rengachari, Ramin Zanbaghi, Arnab Kumar Dutta
  • Publication number: 20150028765
    Abstract: The present invention relates to the field of display technology, and provides a pixel circuit, a driving method thereof, and a display device, so as to compensate for the TFT threshold voltage drift, thereby to improve the brightness non-uniformity of the display device and prolong the service life thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a first storage capacitor, a second storage capacitor, and a light-emitting element. The present invention is adapted to manufacture a display panel.
    Type: Application
    Filed: August 12, 2013
    Publication date: January 29, 2015
    Applicant: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Jingwen Yin, Zhongyuan Wu, Liye Duan
  • Publication number: 20150028766
    Abstract: The present disclosure relates to a field of display technology, and particularly to a pixel circuit and a method for driving the same. The pixel circuit includes a driving sub-circuit, a resetting sub-circuit, and a charging sub-circuit, wherein the driving sub-circuit includes a driving transistor, a first transistor, a third transistor, a first storage capacitor and a second storage capacitor; the resetting sub-circuit discharges the first storage capacitor and the second storage capacitor under the control of a first scan signal outputted from the first scan signal line; and the charging sub-circuit includes a fifth transistor and a sixth transistor.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 29, 2015
    Applicant: BOE Technology Group Co., LTD
    Inventor: Fei Yang
  • Publication number: 20150028767
    Abstract: The invention relates to methods for generating radiation at resonance transitions of metal atoms in mixtures of inert gases and metal vapors that are excited by an arc electric discharge. The technical effect of the claimed invention is raising the efficacy and service life of radiation sources at metal atom resonance transitions, which are excited by a low-pressure arc discharge. The technical effect is achieved due to that, according to a method for generating radiation at resonance transitions of metal atoms in mixtures of inert gases and metal vapors, which method includes exciting mixtures of inert gases and metal vapors by a high-frequency alternating longitudinal electric discharge, a discharge is excited by essentially rectangular current pulses with an off-duty ratio not more than 2.0 and duration not exceeding the efficient life-time of resonance state of the radiating metal atom.
    Type: Application
    Filed: January 22, 2013
    Publication date: January 29, 2015
    Inventors: Igor Georgievich Rudoy, Viktor Aleksandrovich Dolgikh, Leonard Pavlovich Menakhin, Akhat Zinurovich Nusratullin, Arkadij Matveevich Soroka
  • Publication number: 20150028768
    Abstract: A turn-off transition time period, also referred to as a reverse recovery time period, may be compensated for by a controller of a power stage including a bipolar junction transistor (BJT). The reverse recovery time period may be measured in one switching cycle and a subsequent switching cycle may include compensations based on the measured reverse recovery time period. That is the switching on and off of the BJT may be compensated to obtain a desired average output current to a load. When the reverse recovery time period is known, an error in the peak current obtained due to the reverse recovery time period may be calculated. The calculated error may be used to offset the target peak current for controlling the switching of the BJT to begin a turn-off transition of the BJT earlier in a switching cycle and thus reduce error in peak current at the BJT.
    Type: Application
    Filed: July 28, 2014
    Publication date: January 29, 2015
    Inventors: John L. Melanson, Thirumalai Rengachari, Siddharth Maru, Ramin Zanbaghi, Firas Azrai, Rahul Singh
  • Publication number: 20150028769
    Abstract: A driver circuit (1) for operating at least one load, such as a LED unit (7) is provided, comprising an input (2) for receiving an input voltage (V IN) from a power supply (6), an output (3) for providing an output voltage (V OUT) to said load and a switching converter (4) with at least a storage inductor (11) connected with a switching device (13), said switching converter (4) being disposed to generate an average output current by sequential switching operation of said switching device (13) between at least a charging mode and a discharging mode.
    Type: Application
    Filed: February 8, 2013
    Publication date: January 29, 2015
    Inventor: Bing Lai
  • Publication number: 20150028770
    Abstract: A light fixture including a support structure and a plurality of LEDs coupled to the structure and spaced apart along at least a portion of a length of the structure. The light fixture further includes a power pack, the power pack including a driver configured to be electrically coupled to the plurality of LEDs, power input wiring that is configured to receive power for the light fixture, and a cover provided substantially over the driver and the power input wiring. A modular power input connector is accessible without removing the cover, wherein the modular power input connector is coupled to the power input wiring, and wherein the modular power input connector is configured to accept a power cord.
    Type: Application
    Filed: September 11, 2014
    Publication date: January 29, 2015
    Applicant: Orion Energy Systems, Inc.
    Inventors: Neal R. Verfuerth, Ronald E. Ernst, Kenneth J. Wetenkamp
  • Publication number: 20150028771
    Abstract: A single wire serial interface for power ICs and other devices is provided. To use the interface, a device is configured to include an EN/SET input pin. A counter within the device counts clock pulses sent to the EN/SET input pin. The output of the counter is passed to a ROM or other decoder circuit. The ROM selects an operational state for the device that corresponds to the value of the counter. In this way, control states may be selected for the device by sending corresponding clock pulses to the EN/SET pin. Holding the EN/SET pin high causes the device to maintain its operational state. Holding the EN/SET pin low for a predetermined timeout period resets the counter and causes the device to adopt a predetermined configuration (such as off) until new clock pulses are received at the EN/SET pin.
    Type: Application
    Filed: October 15, 2014
    Publication date: January 29, 2015
    Inventors: Kevin P. d'Angelo, David Alan Brown, John Sung K. So, Jan Nilsson, Richard K. Williams
  • Publication number: 20150028772
    Abstract: A light-emitting element lighting device includes: a step-down chopper circuit which outputs a current that flows to a light-emitting element; a current command circuit which selects between a rated mode for passing a rated current for turning ON the light-emitting element and a detection mode for passing an abnormality detection current, which is smaller than the rated current, for detecting an abnormality in the light-emitting element; a voltage detection circuit which detects a voltage across both ends of the light-emitting element; and a control circuit which causes the step-down chopper circuit to stop outputting the current to the light-emitting element, when the voltage across both ends detected by the voltage detection circuit in the detection mode is lower than or equal to an abnormality detection threshold voltage which is set lower than the rated voltage at the time when the light-emitting element is turned ON.
    Type: Application
    Filed: July 17, 2014
    Publication date: January 29, 2015
    Inventors: Hirofumi KONISHI, Masanao OKAWA, Yohei HAYASHI, Itaru ONISHI
  • Publication number: 20150028773
    Abstract: The present invention discloses a light-emitting module using a special circuit design to solve the abnormal breakage of the battery lifetime and comprising a power supply module storing an electrical power; a first sub-circuit and a second sub-circuit, the first sub-circuit comprising a first light-emitting diode module, the second sub-circuit comprising a second light-emitting diode module and a passive component, wherein the passive component is connected with the second light-emitting diode module in series, the lighting color of the light-emitting diode module is different from the lighting color of the second light-emitting diode module; and a control module coupled to the power supply module, the first sub-circuit, and the second sub-circuit, for supplying the electrical power with the first sub-circuit and the second sub-circuit and driving the first light-emitting diode module and the second light-emitting diode module to emit light.
    Type: Application
    Filed: July 22, 2014
    Publication date: January 29, 2015
    Inventor: SHEN-KO TSENG
  • Publication number: 20150028774
    Abstract: A light-emitting element lighting device includes: a step-down chopper circuit which outputs current to a light-emitting element; a current command circuit which selects between (i) light-emission mode for causing a light-emission current larger than a constant rated current, which flows to the light-emitting element when continuous light-emission is caused, to flow and (ii) detection mode for causing an abnormality detection current smaller than the rated current, to flow for detecting a light-emitting element abnormality; a voltage detection circuit which detects a both-end voltage of the light-emitting element; and a control circuit which causes the step-down chopper circuit to stop outputting the current to the light-emitting element, when the both-end voltage detected by the voltage detection unit in the detection mode is lower than or equal to an abnormality detection threshold voltage which is set lower than the rated voltage at a time when the light-emitting element is turned ON.
    Type: Application
    Filed: July 23, 2014
    Publication date: January 29, 2015
    Inventors: Hirofumi KONISHI, Masanao OKAWA, Yohei HAYASHI, Itaru ONISHI
  • Publication number: 20150028775
    Abstract: A controller for controlling the illumination state of a light source of solid state lighting devices such as LED or OLED assemblies, is presented. The controller controls the light source according to a plurality of illumination states subject to determine an event of a plurality of events. The controller controls a power converter that converts power derived from an input voltage waveform of line voltage power supply into a drive signal for the light source. The controller determines an event of a plurality of events encoded within the input voltage waveform of the line voltage power supply. A first state processor determines a next illumination state of the plurality of illumination states, based on the determined event and based on the current illumination state. Line voltage Switch event detection is performed while no power is available at the line voltage terminals.
    Type: Application
    Filed: July 24, 2014
    Publication date: January 29, 2015
    Inventor: Stefan Zudrell-Koch
  • Publication number: 20150028776
    Abstract: A circuit includes a dimming controller, an adjustable resistor connected downstream of and in series connection with the dimming controller, a driver connected downstream and in series with the adjustable resistor, and a light connected downstream and in series with the driver. Related methods are also provided. A light emitting diode (LED) light fixture has a wide adjustment range of wattage and lumen outputs. A variable output LED light fixture has adjustable lumen output. An adjustable LED light fixture is adaptable to multiple lighting environments and needs, including outdoor and indoor applications. A LED light fixture includes a LED driver with a device adjusting the maximum wattage and lumen output of LED array(s). The adjustment is not permanent and can be adjusted multiple times to tune the wattage and lumen output or as required due to changes at the installation environment.
    Type: Application
    Filed: July 28, 2014
    Publication date: January 29, 2015
    Inventor: George Erik McMillan
  • Publication number: 20150028777
    Abstract: A single wire serial interface for power ICs and other devices is provided. To use the interface, a device is configured to include an EN/SET input pin. A counter within the device counts clock pulses sent to the EN/SET input pin. The output of the counter is passed to a ROM or other decoder circuit. The ROM selects an operational state for the device that corresponds to the value of the counter. In this way, control states may be selected for the device by sending corresponding clock pulses to the EN/SET pin. Holding the EN/SET pin high causes the device to maintain its operational state. Holding the EN/SET pin low for a predetermined timeout period resets the counter and causes the device to adopt a predetermined configuration (such as off) until new clock pulses are received at the EN/SET pin.
    Type: Application
    Filed: October 15, 2014
    Publication date: January 29, 2015
    Inventors: Kevin P. d'Angelo, David Alan Brown, John Sung K. So, Jan Nilsson, Richard K. Williams
  • Publication number: 20150028778
    Abstract: The present document relates to solid state lighting (SSL) devices. A driver circuit for phase-cut dimmable SSL based lighting assemblies is described. A control circuit for a power converter is provided. The power converter is configured to convert an input power derived from a mains power supply into a drive power for a light source. The control circuit comprises a dimmer mode detection unit to determine a first dimmer mode. The first dimmer mode indicates if the input power has been derived from the mains power supply using a dimmer. The control circuit comprises a state processor configured to determine a first operation mode of the power converter. The pre-determined first state information is dependent on the first dimmer mode. The control circuit comprises a first control unit configured to generate a first control signal for operating the power converter in accordance to the first operation mode.
    Type: Application
    Filed: April 29, 2014
    Publication date: January 29, 2015
    Applicant: Dialog Semiconductor GmbH
    Inventor: Stefan Zudrell-Koch
  • Publication number: 20150028779
    Abstract: An electric machine, including a set of at least six windings, voltage supply devices capable of supplying an electrical phase, and a circuit for controlling the voltage supply devices controlling phase shifts between the phases supplied by the voltage supply devices, each voltage supply device supplying a phase at the end common to two windings, the other end of the two windings being supplied by one of the two voltage supply devices supplying a phase of which the phase shift with the phase supplied by the voltage supply device is one of the two lowest, in terms of absolute value, among the phase shifts supplied by the voltage supply devices and the phase supplied by the voltage supply device.
    Type: Application
    Filed: January 23, 2013
    Publication date: January 29, 2015
    Inventor: Stephane Mouty
  • Publication number: 20150028780
    Abstract: An air conditioner includes: an outdoor fan provided in an outdoor unit; a permanent magnet synchronous motor that drives the outdoor fan; an inverter that uses a DC power source as a power source and applies a voltage to the permanent magnet synchronous motor; an inverter control means that controls the output voltage of the inverter; and a shunt resist connected between the DC power source and the inverter. If the outdoor fan is rotating due to an external force while the inverter is stopped, the inverter control means causes the inverter to operate using a brake sequence that brakes the rotation of the outdoor fan, and then causes the inverter to operate using a drive sequence that power-drives the outdoor fan.
    Type: Application
    Filed: March 7, 2012
    Publication date: January 29, 2015
    Applicant: MIitsubishi Electric Corporation
    Inventors: Kazunori Hatakeyama, Takashi Yamakawa, Shinsaku Kusube, Akihiro Tsumura
  • Publication number: 20150028781
    Abstract: A method for actuating a BLDC motor for reducing the current ripple in an intermediate circuit capacitor includes means for monitoring pulse width modulated signals (PWMU, PWMV, PWMW) for each motor phase (U, V, W), which add motor phase currents Iu, Iv, Iw) of two adjacent phases in a first step, and add the respective pulse width modulated signals (PWMU, PWMV, PWMW) if the added currents value is over zero, and shift the phase of at least one pulse width modulated signal (PWMU, PWMV, PWMW) in the time slot T if the added signals result is greater than 1.
    Type: Application
    Filed: January 9, 2013
    Publication date: January 29, 2015
    Inventors: Volker Steigerwald, Mirko Kress, Rudolf Polzer
  • Publication number: 20150028782
    Abstract: A traction motor system calculates motor flux by generating a real time effective resistance of a resistance grid calculated from motor torque and measured voltage on a DC link. Calculating effective resistance avoids solely relying on DC link voltage, which can be influenced by conditions such as wheel slip and drop out of one or more resistance grids. The effective resistance calculation is based on nominal motor values using known power levels and conditions. From these nominal values and the effective resistance, various scaling factors based on actual motor power can be generated and used to adjust a nominal flux reference to more accurately reflect actual motor flux. The scaling factors include power and torque scaling factors and a resistance scaling factor that is active during conditions such as wheel slip.
    Type: Application
    Filed: October 16, 2014
    Publication date: January 29, 2015
    Applicant: CATERPILLAR INC.
    Inventors: Alexander Cameron Crosman, III, Joshua M. Williams
  • Publication number: 20150028783
    Abstract: A motor controller comprises a PWM demodulation processor for re storing speed command value Vr from PWM command signal Si, a rotatio n control section for generating drive value Dd of a motor according to the speed command value Vr, a power drive section for generating driving vol tages Uo, Vo and Wo to energize and drive a motor winding according to the drive value Dd, a rotation speed calculating section for generating dete cted speed value Vd as an information signal to be transmitted to outside, and a PWM modulation processor for generating PWM information signal Fp pulse-width modulated by detected speed value Vd. The PWM modul ation processor outputs the PWM information signal Fp generated in sync hronization with the PWM command signal.
    Type: Application
    Filed: January 17, 2013
    Publication date: January 29, 2015
    Inventor: Daisuke Sato
  • Publication number: 20150028784
    Abstract: Disclosed herein are a parallel structure power apparatus and a control method thereof. There are provided a parallel structure power apparatus, including: an alternating current-direct current (AC-DC) converting unit, a main driving unit, a sub-driving unit, a temperature sensor unit measuring and outputting a temperature of the main driving unit and the sub-driving unit, and a controlling unit separately controlling the main driving unit or the sub-driving unit according to a state of the motor to rotate the motor and controlling the main driving unit or the sub-driving unit so that the main driving unit or the sub-driving unit which is being driven is turned off and the main driving unit or the sub-driving unit which is in a stop state is driven when the temperature measured by the temperature sensor unit becomes a predetermined temperature or more, and a control method thereof.
    Type: Application
    Filed: July 24, 2014
    Publication date: January 29, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: HAN TAE KIM, Kyeoung Hun Park, Geun Hong Lee
  • Publication number: 20150028785
    Abstract: A safety system for an electric motor controller is provided. The safety system includes a torque safety monitor having a first processor distinct from a second processor of a main motor controller. The first processor is configured to one of decrease or shut down AC (alternating current) power, sent from a DC/AC (direct current to alternating current) inverter to an electric motor, in response to an estimated torque of the electric motor differing from a commanded torque associated with the main motor controller by more than a set amount.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 29, 2015
    Applicant: Atieva, Inc.
    Inventor: Yifan TANG
  • Publication number: 20150028786
    Abstract: A drive system with energy store and method for operating a drive system, an inverter powering an electric motor, the inverter being supplied from a unipolar DC-link voltage, an energy store being connected in parallel to the inverter, in particular, a film capacitor being connected in parallel to the inverter, the DC-link voltage being generated by a DC/DC converter which is supplied from an AC/DC converter, especially a rectifier, in particular, an electric current being able to be supplied to the DC link by the DC/DC converter.
    Type: Application
    Filed: January 28, 2013
    Publication date: January 29, 2015
    Inventors: Sebastian Schiffmann, Josef Schmidt, Matthias Hauck, Christian Lampert, Daniel Tritschler, Thomas Zöller
  • Publication number: 20150028787
    Abstract: A conveyance cart includes: a body frame; a deck provided liftably against the body frame to load a burden; an electric actuator electrically driven to expand or contract to lift or lower the deck; a current detection element that detects an electric current value supplied to the electric actuator; and a PWM control element that drives the electric actuator in a pulse width modulation (PWM) control manner. The PWM control element increases an on-duty ratio input to the electric actuator if the electric current value detected by the current detection element exceeds a setting value when the deck is lifted.
    Type: Application
    Filed: March 7, 2013
    Publication date: January 29, 2015
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Shinichi Sekine, Osamu Miyatani
  • Publication number: 20150028788
    Abstract: A method of controlling a motor is provided. The method may determine one of a switching period, a fundamental cycle, and a current target per phase leg of the motor having at least one high voltage transition point; determine a dwell period to be enforced at the transition point between an engagement of a first switch of the phase leg and an engagement of a second switch of the phase leg where each of the first switch and the second switch may be selectively engageable between a first state and a second state; engage the first switch from the first state to the second state at the transition point; and engage the second switch from the first state to the second state after the transition point and upon expiration of the dwell period.
    Type: Application
    Filed: July 25, 2013
    Publication date: January 29, 2015
    Applicant: Caterpillar, Inc.
    Inventors: Jackson Wai, Ahmed Khalil, Carlos Nino Baron, Jesse Gerdes, Brad A. Kough
  • Publication number: 20150028789
    Abstract: A digital control section generates a digital drive voltage command signal in response to a digital drive current command value and to a drive current digital sensing signal. A digital-to-analog converter generates an analog drive voltage command signal from the digital drive voltage command signal. In response to the analog drive voltage command signal, a driver output section drives a motor and a sensing resistor. If the digital drive current command value is between a positive threshold voltage and a negative threshold voltage, the computation section generates an internal control signal that is in a first state “1”, and exercises control to place the gain of the drive current sensing amplifier in a first state “H”. If not, the computation section exercises control to place the gain of the drive current sensing amplifier in a second state “L”, namely, in a low state.
    Type: Application
    Filed: July 22, 2014
    Publication date: January 29, 2015
    Inventor: Ryuhei Uchida
  • Publication number: 20150028790
    Abstract: Stepper motor winding current regulation methods and apparatus adapt a maximum blanking period to generate an adapted blanking period that is proportional to a currently-selected current regulation set-point. Sensed winding current feedback is ignored at a current regulation controller during the adapted blanking period or during a minimum blanking period, whichever longer, to avoid attempting to track noise imposed upon a sensed winding current feedback signal at an initiation of rapid current changes di/dt. Doing so may decrease ripple in the motor winding current waveform and reduce zero-crossing distortion by decreasing overshoot of the current regulation set-point by the sensed winding current.
    Type: Application
    Filed: April 21, 2014
    Publication date: January 29, 2015
    Inventors: Wenchao Qu, Anuj Jain, Ryan Paul Kehr
  • Publication number: 20150028791
    Abstract: An image forming apparatus drives and rotates at least one of a photosensitive drum and a transport roller with use of a stepping motor in a multi-phase excitation mode. The image forming apparatus includes: a constant-voltage control unit controlling the stepping motor by applying a constant voltage for each phase; a constant-current control unit controlling the stepping motor by regulating an amount of current for each phase by a chopping control; a measuring unit measuring a chopping count of each phase on a per-step basis; a chopping count determination unit determining whether the chopping count of each phase is less than or equal to a predetermined count; and a control switching unit causing the constant-voltage control unit to control the stepping motor when the chopping count determination unit determines affirmatively, and causing the constant-current control unit to control the stepping motor when the chopping count determination unit determines negatively.
    Type: Application
    Filed: July 16, 2014
    Publication date: January 29, 2015
    Applicant: KONICA MINOLTA, INC.
    Inventors: Takahiro TSUJIMOTO, Hideki NAKAMURA, Takeshi ISHIDA, Naoto SUGAYA, Akimasa ISHIKAWA
  • Publication number: 20150028792
    Abstract: An induction motor controller is provided. The induction motor controller includes a first module that derives a commanded stator voltage vector, in a stator flux reference frame, via a rotor flux regulator loop and a torque regulator loop, which process at least partially in the stator flux reference frame. The induction motor controller includes a second module that processes the commanded stator voltage vector to produce AC (alternating current) power for an induction motor.
    Type: Application
    Filed: July 23, 2013
    Publication date: January 29, 2015
    Applicant: Atieva, Inc.
    Inventor: Yifan TANG
  • Publication number: 20150028793
    Abstract: A motor control apparatus includes a secondary-magnetic-flux-command calculating unit including a minimum-current-secondary-magnetic-flux-command calculating unit that calculates a secondary magnetic flux command for minimizing a current root-mean-square value due to a torque current and an excitation current and a PWM-signal generating unit that generates a torque current command for outputting a desired torque command and an excitation current command for outputting the secondary magnetic flux command, performs vector control such that a q-axis current, which is a detection value of the torque current, and a d-axis current, which is a detection value of the excitation current, respectively coincide with the torque current command and the excitation current command, and generates control signals for turning on and off a switching element in an inverter.
    Type: Application
    Filed: January 30, 2013
    Publication date: January 29, 2015
    Inventors: Takuji Yoshimoto, Yoshinori Yamashita
  • Publication number: 20150028794
    Abstract: A high efficiency multi-mode power conversion device has DC-boost receiving input power from a DC (e.g., solar) source, a power inverter and an AC grid supply. Power conversion switches are arranged in a stacked configuration with controllable inner and outer switches conveying: in an non-inverting switched mode, an AC voltage from power from the AC grid supply; in an inverting outer switched mode, an AC voltage from power from the AC grid supply; and in an inverting outer and inner switched mode, an inverted voltage from power from the DC-boost circuit. At least one input switch and output to the AC grid supply is coupled to an output of the power inverter and a resonant circuit is coupled to the input switch. A rectifier and/or high voltage AC output tap is coupled to the resonant circuit and a controller is coupled to the power conversion switches and the input switch.
    Type: Application
    Filed: July 29, 2013
    Publication date: January 29, 2015
    Applicant: Rhombus Energy Solutions, Inc.
    Inventor: Frederick Flett
  • Publication number: 20150028795
    Abstract: An energy storage apparatus includes an input unit connected to a solar cell to receive a DC power, a sensing unit for sensing and outputting a voltage of the solar cell, a signal generating unit for generating a periodic signal whose magnitude is periodically changed, a voltage generating unit for variously generating a reference voltage corresponding to the periodic signal, a control signal generating unit for generating a duty control signal by using regions in which the periodic signal has a magnitude lower than or higher than the reference voltage, a charging unit for performing a charging operation by means of an on/off switching operation according to the duty control signal, a battery unit for charging an energy by means of the charging operation of the charging unit, and a main control unit configured to control so that the charging operation is initiated with a reference voltage.
    Type: Application
    Filed: July 22, 2014
    Publication date: January 29, 2015
    Applicant: POWER BRIDGE CO.,LTD.
    Inventor: WONJIN CHO
  • Publication number: 20150028796
    Abstract: A power supply apparatus that receives electric power from a power generation apparatus having a varying output and supplies electric power to an outside, the apparatus comprising: a power storage device that has a larger amount by which electric power is stored and/or a lower self-discharge rate than a capacitor device used as a passive device and also has higher charge and discharge efficiency and/or higher responsiveness than a secondary battery, the power storage device receiving electric power from the power generation apparatus and discharging electric power to the outside; a current control unit that controls a current supplied from the power storage device to the outside; and a control unit that controls a current and a voltage of the power generation apparatus by charging and discharging the power storage device so as to maximize an amount of power generation by the power generation apparatus.
    Type: Application
    Filed: March 4, 2013
    Publication date: January 29, 2015
    Applicant: JGC CORPORATION
    Inventors: Tomonori Nakayama, Masayoshi Ishida, Hiroaki Hasegawa, Kazutaka Hiraoka, Toshiyuki Nagai, Nobuo Kakizaki
  • Publication number: 20150028797
    Abstract: A portable charger is provided for charging electronic devices from a rechargeable internal battery. To accommodate multiple electronic devices, a portable charger unit is combined with multiple power output connection interfaces for connecting to more than one electronic device, as necessary, including connector cables attached to the charger housing or power connection ports. The charger also includes at least one power input connection interface for recharging the internal battery from an external power source, including an AC wall plug interface and a DC car charger interface, each connected to the charger housing and movable between a retracted, storage position and an extended use position. The power output connector cables can also be stored within storage cavities formed in the charger housing when not in use and extended therefrom for connection with electronic devices in need of recharging. The power connection ports can act as power inputs, power outputs, or both.
    Type: Application
    Filed: March 20, 2014
    Publication date: January 29, 2015
    Inventors: Garold C. Miller, Nathan Daniel Weinstein
  • Publication number: 20150028798
    Abstract: Systems and devices for a high-efficiency magnetic link for implantable devices are disclosed herein. These devices can include a charging coil located in the implantable device and a charging coil located in a charge head of a charger. The charging coils can each include an elongate core and wire windings wrapped around a longitudinal axis of the elongate core. The charging coil of the charge head can be attached to a rotatable mount, which can be used to align the longitudinal axis of the charging coil of the charge head with longitudinal axis of the implantable device such that the axes of the charging coils are parallel.
    Type: Application
    Filed: July 29, 2014
    Publication date: January 29, 2015
    Inventors: Brian R. Dearden, Glen A. Griffith
  • Publication number: 20150028799
    Abstract: A wireless communication device includes a wireless charging circuit configurable to receive a wireless power signal from a power transmitting unit and to charge the wireless communication device under control of a processing device and in conjunction with a charging session with the power transmitting unit. A wireless interface device operates under control of the processing device to establish a wireless connection with the power transmitting unit via a connection establishment procedure, wherein the wireless connection is separate from the wireless power signal. Control data is exchanged with the power transmitting unit via the wireless connection, wherein the control data is used by the processing device to implement the charging session with the wireless charging circuit. A response is generated to a disruption event of the wireless communication device that includes implementing a restoration procedure for restoring the wireless connection, without implementing the connection establishment procedure.
    Type: Application
    Filed: August 13, 2013
    Publication date: January 29, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Chikan Kwan, Xin Tian, Erik John Rivard, Xianbo Chen, Lih-Feng Tsaur
  • Publication number: 20150028800
    Abstract: A wireless charger equipped with an auxiliary power supply includes a power input unit which is connected to an external power supply, a wireless power transmission unit which wirelessly transmits electrical power to an electronic device through a magnetic field, and an auxiliary power unit which charges a battery provided therein with electrical power supplied from the power input unit, or charges the battery and, at the same time, provides the electrical power to the wireless power transmission unit, and provides the electrical power of the battery provided therein to the wireless power transmission unit when the power supply from the power input unit is stopped.
    Type: Application
    Filed: January 7, 2014
    Publication date: January 29, 2015
    Applicant: LG INNOTEK CO., LTD.
    Inventor: Sang Beom KIM
  • Publication number: 20150028801
    Abstract: Systems and methods for converting voltages between different voltage levels in a receiver are disclosed. In an aspect, a wireless power receiver apparatus for charging a chargeable device is provided. The wireless power receiver apparatus for charging a chargeable device can include a receive antenna configured to wirelessly receive power at a level sufficient for charging the chargeable device. The wireless power receiver apparatus can also include converter circuitry. The converter circuitry can be coupled to the receive antenna. The converter circuitry can be configured to receive an input voltage derived from the wirelessly received power. The converter circuitry can also be configured to produce an output voltage that is scaled to a value relative to the input voltage based on a relationship between the input voltage and a first voltage level threshold.
    Type: Application
    Filed: April 22, 2014
    Publication date: January 29, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Francesco Carobolante, Joseph Najib Maalouf, Sumukh Ashok Shevde
  • Publication number: 20150028802
    Abstract: A wireless charging device may include: a sensor unit sensing an input from an external device and generating a wake-up signal; a control unit, upon receiving the wake-up signal, exiting from a sleep mode to enter an active mode, and generating an activation signal; a detection unit receiving the activation signal from the control unit to detect a mobile terminal; and a power supply unit, in the case that the detection unit detects the mobile terminal, supplying power to the mobile terminal wirelessly.
    Type: Application
    Filed: April 30, 2014
    Publication date: January 29, 2015
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Gye Won LEE, Hyun Keun LIM
  • Publication number: 20150028803
    Abstract: Systems and methods for converting voltages between different voltage levels in a receiver are disclosed. In an aspect, a wireless power receiver apparatus for charging a chargeable device is provided. The apparatus includes a plurality of receive antennas disposed on a cover of the chargeable device, wherein at least one of the plurality of receive antennas is configured to wirelessly receive power according to a wireless charging protocol different from at least one other of the plurality of receive antennas. The apparatus includes a switching circuit disposed on the cover and configured to receive the wireless power from at least one of the plurality of receive antennas and selectively provide a respective voltage from a corresponding one of the plurality of receive antennas across an output configured to be connected to an input of the chargeable device.
    Type: Application
    Filed: July 21, 2014
    Publication date: January 29, 2015
    Inventors: Sumukh Ashok Shevde, Joseph Najib Maalouf, Francesco Carobolante
  • Publication number: 20150028804
    Abstract: A contactless power transmission device includes a switching unit that switches a power transmission line so that a first power is transmitted through the first line when an AC power supply outputs a first AC power and so that a second power is transmitted through a second line when the AC power supply outputs a second AC power. An impedance conversion unit is arranged on the second line that converts an impedance from an output of the AC power supply to a variable load when the second power is transmitted through the second line to approach an impedance from the output of the AC power supply to the variable load when the first power is transmitted through the first line.
    Type: Application
    Filed: February 19, 2013
    Publication date: January 29, 2015
    Applicant: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Yutaka Nakashima, Tsuyoshi Koike, Hiroshi Katsunaga, Yuichi Taguchi, Hiroki Togano, Keisuke Matsukura, Yuki Tsunekawa, Takuma Ono
  • Publication number: 20150028805
    Abstract: A charger that evaluates the effectiveness of the charging field generated by the charger at an implantable device. The charger includes a charging coil, a communication module, and a processor. The processor can include instructions to determine the effectiveness of the charging field based on one or several signals or communications received from the implantable device. The charger can use the determination of the effectiveness of the charging field to vary the strength of the charging field and/or to prompt the user to move the charger with respect to the implantable device.
    Type: Application
    Filed: July 29, 2014
    Publication date: January 29, 2015
    Inventors: Brian R. Dearden, Brian M. Shelton, James H. Wolfe
  • Publication number: 20150028806
    Abstract: A charger including a class E power driver, a frequency-shift keying (“FSK”) module, and a processor. The processor can receive data relating to the operation of the class E power driver and can control the class E power driver based on the received data relating to the operation of the class E power driver. The processor can additionally control the FSK module to modulate the natural frequency of the class E power transformer to thereby allow the simultaneous recharging of an implantable device and the transmission of data to the implantable device. The processor can additionally compensate for propagation delays by adjusting switching times.
    Type: Application
    Filed: July 29, 2014
    Publication date: January 29, 2015
    Inventors: Brian R. Dearden, James H. Wolfe, Manish Khemani
  • Publication number: 20150028807
    Abstract: A method and system for efficient distribution of power using wireless means, and a system and method for wireless power distribution to provide electric devices, such as vehicles with a way to continuously and wirelessly collect, use and charge their power systems and thereby use the transmitted power for operation. The system and method allows a hybrid, simplified and less costly way to charge devices, such as vehicles so that the devices continuously operate while charging/recharging.
    Type: Application
    Filed: October 11, 2014
    Publication date: January 29, 2015
    Inventor: Alex Mashinsky