Patents Issued in February 1, 2007
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Publication number: 20070024208Abstract: The invention relates to a circuit arrangement for operating a gas discharge lamp with a current. According to the invention, the current comprises a high-frequency AC component and a low-frequency AC component.Type: ApplicationFiled: September 7, 2004Publication date: February 1, 2007Inventor: Peter Lurkens
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Publication number: 20070024209Abstract: A protection control circuit for discharge lamps aims to control protection signals input to a load at a rear end of a high voltage output zone that are generated during abnormal conditions. The high voltage output zone has a control unit and a driving unit, and a switch device interposed between them to receive a first voltage distribution signal output from the control unit and output a plurality of second voltage distribution signals corresponding to the number of the driving devices. Each of the driving devices is connected to a high voltage output zone line of the discharge lamp that feeds back a protection signal to the switch device. The switch device determines a first electricity condition or a second electricity condition of each high voltage output zone line of the discharge lamps that is connected to the individual driving device.Type: ApplicationFiled: July 26, 2005Publication date: February 1, 2007Inventors: Chin-Wen Chou, Ying-Nan Cheng, Chin-Biau Chung
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Publication number: 20070024210Abstract: A lighting apparatus emitting polychromatic light comprising light of at least two light-channels with different colors, wherein each light-channel is controlled by one modified pulse-width-modulated signal (modified PWM-signal), and each modified PWM-signal results from the modulation of one color-pulse-width-modulated signal (color-PWM-signal) with an intensity-pulse-width-modulated signal (intensity-PWM-signal) in order to control the brightness and color location of the polychromatic light.Type: ApplicationFiled: July 27, 2005Publication date: February 1, 2007Inventors: Michel Zwanenburg, Timothy Dunn
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Publication number: 20070024211Abstract: A flexible cable is provided for a lighting system having a power supply that includes a power supply input to receive a first signal having a first frequency and a circuit for converting the first signal to a second signal, and at least one luminaire coupled to a lamp driver. The cable comprises a first leg of wires for carrying the second signal. The first wire electrically connects a loop output of the power supply to an input of the lamp driver and a second wire electrically connects an output of the lamp driver to a loop return of the power supply. The cable further comprises a second leg of wires electrically connected to a ground of the power supply and the ground of the lamp driver. The second signal has a substantially constant current and a second frequency distinctly higher than the first frequency. The flexible cable further comprises a modular connector.Type: ApplicationFiled: March 20, 2006Publication date: February 1, 2007Inventors: Philip Rimmer, Carole Sherrington
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Publication number: 20070024212Abstract: A multi-lamp driver t disclosed, comprising a power driver coupled to a plurality of lamps to supply power thereto, a feedback circuit coupled to at least one of the lamps to generate a feedback signal, a control circuit coupled between the feedback circuit and the power driver to control the power driver according to an illumination control signal and the feedback signal for total illumination adjustment of the lamps, and at least one switch controlled by the control circuit to turn at least one of the lamps on or off In a total illumination adjustment of the lamps, the switch turns on or off timely. The difference between the maximum and minimum value of the total illumination of the lamps is thus increased.Type: ApplicationFiled: July 26, 2006Publication date: February 1, 2007Applicant: BENQ CORPORATIONInventors: Chung-Jung Huang, Yung-Yi Hsu
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Publication number: 20070024213Abstract: Exemplary embodiments provide a system, method and appartus for regulating current in loads, such as in an array of independent pluralities of light emitting diodes (“LEDs”). An exemplary system comprises a multiplexer adapted to switch current to each independent string of LEDs; a first controller to maintain a substantially constant average current level to the plurality of LEDs; and a second controller to modulate a current amplitude and duration of time division multiplexing for each independent string of LEDs. Another aspect of the system provides for modulating the on time for switching current to maintain a substantially constant average current level and to respond and converge quickly to changing current reference levels.Type: ApplicationFiled: July 27, 2006Publication date: February 1, 2007Applicant: SynDiTec, Inc.Inventors: Anatoly Shteynberg, Harry Rodriguez
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Publication number: 20070024214Abstract: A method for determining whether to activate an illumination source includes directing an air current across at least a portion of the illumination source and across at least a portion of a temperature sensor. The method also includes sensing the temperature of the air current with the temperature sensor and determining whether to activate the illumination source based on the temperature of the air current.Type: ApplicationFiled: July 26, 2005Publication date: February 1, 2007Inventors: Timothy Souza, Daniel Rudolph
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Publication number: 20070024215Abstract: The instant invention relates to an ignitor turn-off switch for ballasts for high intensity discharge (HID) lamps to prevent damage to ballasts by disconnecting the ignitor if a lamp has failed or is missing. The ignitor turn-off switch circuit comprises an AC power source, a full-wave bridge rectifier circuit, a voltage regulator circuit, a first solid state integrated circuit as a timer circuit, and a second solid state integrated circuit as a switch circuit. The second solid state integrated circuit comprises an optically-coupled triac and light emitting diode wherein the optically-coupled triac is driven by a beam generated by the light emitting diode.Type: ApplicationFiled: July 26, 2006Publication date: February 1, 2007Applicant: VARON LIGHTING, INC.Inventors: Glenn Garbowicz, Thomas Mayer
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Publication number: 20070024216Abstract: A video display apparatus including a display unit and a horizontal deflector to deflect a beam scanned onto the display unit based on a video signal including horizontal synchronization information. The video display apparatus may further include a signal generator to generate a pulse signal having a predetermined duty ratio based on the horizontal synchronization information of the video signal, a driver to transform a predetermined power source voltage into a driving current to drive the horizontal deflector in correspondence to the pulse signal and to output the driving current to the horizontal deflector, a memory to store duty ratio information of the pulse signal corresponding to the driving current for the horizontal deflector, and a controller to control the signal generator to generate the pulse signal having the duty ratio corresponding to the duty ratio information stored in the memory.Type: ApplicationFiled: July 26, 2006Publication date: February 1, 2007Inventor: Sang-soo JO
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Publication number: 20070024217Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may include receiving shunt current in one or more conductors according to a sensed component of power distributed by the conductors through one or more transformers coupled to the conductors and determined by an inductance associated with the transformers and a capacitance associated with the conductors.Type: ApplicationFiled: July 26, 2005Publication date: February 1, 2007Inventor: Carl Dodge
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Publication number: 20070024218Abstract: A motorized roller incorporating a driving motor for driving the roller and accompanied with a motor driving circuit for driving the motor, including a lock detecting means adapted to detect a lock of at least one selected from the driving motor and the motorized roller and a power control means adapted to control electric power supplied to the driving motor, wherein the control means is adapted to reduce the electric power supplied to the driving motor upon detection of the lock of the at least one by the lock detecting means.Type: ApplicationFiled: July 20, 2006Publication date: February 1, 2007Inventor: Yoshinori Nagai
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Publication number: 20070024219Abstract: A voltage detector is connected to a connection terminal connected to one phase of an AC output of an inverter through a diode. A removable charge power supply is connected to said connection terminal and another connection terminal. A charge-power-supply connection judging circuit judges whether the charge power supply is or isn't connected, based on a charge power supply voltage detected by a voltage detector. A mode change control circuit outputs switch signal by the result of said judgment. By receiving this switch signal, the inverter controller switches the operation of the inverter between the Motor Drive mode or the Battery Charge mode. Thereby, a motor drive device detects a connecting status of an external charge power supply and steadily switches the operation of the inverter between the Motor Drive mode or the Battery Charge mode.Type: ApplicationFiled: July 27, 2006Publication date: February 1, 2007Inventors: Shigehisa Aoyagi, Tsunehiro Endo, Hidefumi Shirahama, Yoshiki Ito
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Publication number: 20070024220Abstract: A permanent magnet brushless 3-phase motor comprises windings R, Y, B, each divided into a plurality of sections 1-5 and switch means S1-S12 for selectively connecting the section of the respective winding e.g. R in series and/or parallel with all other sections of that winding R. Control means are provided for actuating the switch means S1-S12 to connect the winding sections 1-5 in different configurations whilst the motor is running to alter the speed/torque characteristics of the motor.Type: ApplicationFiled: October 22, 2004Publication date: February 1, 2007Inventors: Nabeel Shirazee, Praveen Choudhary
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Publication number: 20070024221Abstract: A motor control device for controlling rotation of a motor by controlling a driving voltage applied to the motor is provided. The device includes a driving voltage control unit configured to control the driving voltage, and a detecting unit configured to detect rotation of the motor. The motor has operating characteristics indicative of relationship between the driving voltage and a rotation speed of the motor, where the operating characteristics have a specific dead-band range of driving voltages wherein the rotation speed of the motor is zero regardless of changes in the driving voltage. The driving voltage control unit performs a low rotation control operation including at least one alternating repetition of a first control operation and a second control operation.Type: ApplicationFiled: July 26, 2006Publication date: February 1, 2007Inventors: Yasuhiko Yoshihisa, Hitoshi Igarashi
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Publication number: 20070024222Abstract: An electronic device includes a motor, a detector, and a controller. The detector detects a rotational speed of the motor. The controller selects a gain from a plurality of gains based on the rotational speed and controls rotation of the motor through feedback control. The controller uses a first gain from startup of the motor until the motor initially reaches a predetermined rotational speed after the startup. The controller switches to a second gain smaller than the first gain when the motor initially reaches the predetermined rotational speed after the startup, and uses the second gain in a predetermined range with respect to the rotational speed. The predetermined range is defined between a lower limit smaller than the predetermined rotational speed and a higher limit larger than the predetermined rotational speed.Type: ApplicationFiled: July 27, 2006Publication date: February 1, 2007Applicant: Brother Kogyo Kabushiki KaishaInventor: Tasuku Sugimoto
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Publication number: 20070024223Abstract: A start-up circuit which decreases a start-up current and stabilizes running of a DC fan. The start-up circuit includes a digital-analog converter for convert a digital control signal from a control chip to an analog control signal, a comparator, a switching device for controlling start-up of the DC fan, and a feedback device adjusting current passing through the switching device. The comparator includes two input terminals and an output terminal. One input terminal is connected to an output terminal of the digital-analog converter. The switching device is connected to the output terminal of the comparator. An output signal of the switching device is inputted to the other input terminal of the comparator via the feedback device.Type: ApplicationFiled: May 24, 2006Publication date: February 1, 2007Applicant: HON HAI Precision Industry CO., LTD.Inventors: Yong-Xing You, Feng-Long He, Hai-Qing Zhou
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Publication number: 20070024224Abstract: A kW-based torque controller for use with an AC induction motor has been developed that includes an AC-to-DC converter for receiving incoming three-phase power from a utility and converting the three-phase AC signal to a DC signal, a DC-AC inverter, coupled to the output of the AC-to-DC converter for transforming the DC input signal into a variable frequency/variable phase output signal (the output signal from the DC-AC converter being applied as the input signal to the AC induction motor), and a load sensing unit coupled between a load connected to the motor and the DC-AC inverter for measuring changes in the kW load condition at the motor and providing control signals to the DC-AC inverter to adjust the torque accordingly.Type: ApplicationFiled: July 26, 2005Publication date: February 1, 2007Inventor: Raymond McDonald
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Publication number: 20070024225Abstract: An electronically commutated motor comprises a rotor (208); a stator (201) electromagnetically interacting with the rotor (208), which stator is formed with a stator winding (202, 204, 206); a power stage (122) controlling the currents flowing in the stator winding (202, 204, 206) during operation; at least one current measuring element (242, 244) for sensing a measured value for the currents (I_UPPER, I_LOWER) flowing in the power stage, and an overcurrent measuring element (152, 162) for evaluating an associated measured value and for sensing a current whose absolute value exceeds a predetermined limit value (I_MAX_UPPER, I_MAX_LOWER); a holding element (154, 164) associated with the overcurrent measuring element (152, 162), configured, when an overcurrent occurs in the associated current measuring element (242, 244), to generate an overcurrent signal (OC_UPPER, OC_LOWER), to store the signal, and to deliver a signal to the power stage (122).Type: ApplicationFiled: July 14, 2006Publication date: February 1, 2007Inventors: Alexander Hahn, Harald Schmid, Michael Kisch
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Publication number: 20070024226Abstract: A method for controlling at least one electric drive of a vehicle includes comparing a value of an electric variable to a threshold. The electric variable relates to an operation of the electric drive or is derived from the operation of the electric drive. The electric drive is stopped or operated with a reduced value of the electric variable if the threshold is reached and/or if the threshold is exceeded. The threshold is specified by a permissible value of the electric variable relating to an operation of several electric drives.Type: ApplicationFiled: July 19, 2006Publication date: February 1, 2007Inventor: Gerhard Mersch
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Publication number: 20070024227Abstract: An actuating drive for a rotor blade in a wind power installation is provided with an electric motor and a frequency converter which has a rectifier that is to be fed from a power supply system, a link connected to the rectifier, and a d.c.-to-a.c. inverter for feeding the motor, the link carrying a specified nominal operating voltage in a network-fed normal operation of the frequency converter. Furthermore, an auxiliary energy supply device is provided that is connected to the link. The auxiliary energy supply device includes and energy store which makes available a support voltage that amounts to less than 80% of the nominal operating voltage of the link. A diode is connected between the energy store and the link, and is arranged, with regard to its forward direction, in such a way that it feeds a support voltage from the energy store into the link if the link voltage falls below the support voltage.Type: ApplicationFiled: June 29, 2006Publication date: February 1, 2007Inventors: Steffen Kunkel, Karl-Gunter Herrmann, Michael Horning, Berno Kobelbauer, Jorg Dantlgraber, Stephan Becker, Gunther Neidlein, Bernd Schnurr
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Publication number: 20070024228Abstract: To provide a stepping motor drive apparatus for driving a stepping motor, that is a driving object, with low noise and low vibration.Type: ApplicationFiled: July 27, 2006Publication date: February 1, 2007Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventor: Hiroshi FUJINAKA
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Publication number: 20070024229Abstract: An AC electronic variable speed drive unit is used to power an AC induction motor that drives a centrifugal pump at controlled speeds for controlling the flow of a fluid process. The feedback loop controller function is implemented in the variable speed drive electronics, another network device, or may be located in a separate controller. This drive/motor/pump unit is used instead of a more conventional process control valve, with its attending actuator and positioning device, in order to improve the responsiveness, stability, and accuracy of the control loop. Coincidently, it also reduces the energy required for the process by the elimination of pressure drop across the control valve and allows a lower cost, smaller electric motor and pump to be used. Elimination of the control valve eliminates a source of fugitive emission through the valve packing, and reduces maintenance requirements that are necessary for a control valve.Type: ApplicationFiled: June 21, 2006Publication date: February 1, 2007Inventor: Richard Caro
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Publication number: 20070024230Abstract: An electrically powered hand tool is described and which includes a three phase electrical motor having a plurality of poles; an electrical motor drive electrically coupled with the three phase electrical motor; and a source of electrical power which is converted to greater than about 208 volts three-phase and which is electrically coupled with the electrical motor drive.Type: ApplicationFiled: July 29, 2005Publication date: February 1, 2007Inventors: Kurt Myers, Teddy Reed
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Publication number: 20070024231Abstract: A motor drive for conditioning power to be delivered to a load includes a current feedback circuit that monitors current being fed to a transformer connected between the motor drive and the load. Based on the total current input to the transformer, a controller adjusts the V/Hz profile along which the motor drive operates. In this regard, the motor drive operates according to a V/Hz profile during start-up that prevents transformer saturation.Type: ApplicationFiled: July 26, 2005Publication date: February 1, 2007Inventors: Kevin Lee, Jyrki Ahlgren, Ian Wallace, Thomas Doring
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Publication number: 20070024232Abstract: A motor controller capable of suppressing a large speed change generated at the time of changeover from a synchronous operation mode to a position feedback operation mode and implementing even acceleration characteristics regardless of the load torque by estimating a torque of a permanent magnet motor in the synchronous operation mode for driving the permanent magnet motor and setting an initial value of a current command value in a position sensor-less operation mode on the basis of information of the torque estimated value.Type: ApplicationFiled: July 28, 2006Publication date: February 1, 2007Inventors: Takahiro Suzuki, Tsunehiro Endo, Kazuaki Tobari, Daigo Kaneko, Daisuke Maeda, Akira Yamazaki
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Publication number: 20070024233Abstract: Self powered cell phones are operated with a rotatable crank shaft, the rotary motion of which is translated by cam or slotted slider crank-driven gear trains into pivoting motions of an internal armature, in reciprocal alternating opposite directions, whereby one or more conductive wire coils, supported by the armature, are caused to intersect the magnetic flux of one or more permanent magnets disposed within the cell phones, thereby generating electrical voltage and current for operating, charging or recharging the cell phone batteries. Recharging mechanisms are provided which can be manually or flywheel operated to impart the pivotal motions of the armature and supply the current generated therein directly to the cell phone batteries.Type: ApplicationFiled: July 28, 2005Publication date: February 1, 2007Inventors: Jack Ekchian, Berj Terzian
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Publication number: 20070024234Abstract: A charging system for an unmanned underwater vehicle (UUV) is disposed within a submerged docking station. The charging system includes a battery, a fuel cell, a fuel source, and a charge controller. The battery supplies electrical power to an electrical distribution bus in the docking station. The charge controller monitors the charge state of the battery and, when needed, activates the fuel cell to recharge the battery. The charge controller also activates the fuel cell when a UUV is docked in the docking station for recharging of its power plant.Type: ApplicationFiled: March 30, 2004Publication date: February 1, 2007Inventors: Calvin Potter, Sharon Brault, Paul Wingett
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Publication number: 20070024235Abstract: A battery pack comprising: a housing; at least one cell within the housing; wherein the housing has inscribed thereon a battery pack date code for identifying a date of manufacture of the battery pack; and, wherein the cell has inscribed thereon a number (e.g., a periodically changing, predetermined random number) that is associated with the battery pack date code in an external list; whereby comparing the number on the cell to the number recorded in the list for the battery pack date code of the battery pack determines whether the cell belongs to the battery pack.Type: ApplicationFiled: July 28, 2005Publication date: February 1, 2007Applicant: Research In Motion LimitedInventor: Martin Guthrie
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Publication number: 20070024236Abstract: The invention provides a battery box including a body (1) for housing a lead acid battery (2), the body having a base (3) and sides (4) extending from the base to define an open top (5). A lid (6) is applicable to the body to close the top. In use, the lid has at least one generally vertically oriented side (7). Each one of a plurality of relatively water sensitive electrical components is electrically connectable to the battery and housed substantially within the lid. The electrical components each have a user interface located on the vertically oriented side (7) thereby to inhibit damage to the electrical component as a result of water ingress.Type: ApplicationFiled: September 10, 2003Publication date: February 1, 2007Inventor: Richard Arakelian
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Publication number: 20070024237Abstract: A preferred embodiment of portable lunchbox equipment that is particularly useful at construction and other jobsites is disclosed which provides important desirable features and functionality comprising a housing, at least one charger for charging a removable battery pack, an audio unit for producing an audio signal, a heating unit, an insulated compartment, a cooling unit for the compartment, a cord and plug for connecting said apparatus to a source of AC power, and circuitry for selectively applying power to the audio unit, the charger and the heating unit.Type: ApplicationFiled: July 18, 2006Publication date: February 1, 2007Inventors: Steven Cole, Richard Gray
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Publication number: 20070024238Abstract: A kit comprising an inductive charger having a first coil and a portable device having an energy store and a second coil coupled to the energy store whereby the energy store can be charged from a varying electrical field applied across the first coil, the charger and the device being configured remotely from the coils for encouraging coupling between the first and second coils when the charger and the device are located against each other.Type: ApplicationFiled: July 27, 2005Publication date: February 1, 2007Inventors: Shogo Nakade, Takaharu Fujii, Kenichi Hashizume
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Publication number: 20070024239Abstract: A data communication cable for automatically recognizing a power-supply source is disclosed. The cable includes a USB (Universal Serial Bus) port and a data port to perform a data communication between a terminal and a personal computer (PC) and provides the terminal with a charge current, so that a power-supply source is automatically recognized and adjusted to stably perform a charge operation while minimizing the number of overload occurrences and the number of faulty charging operations.Type: ApplicationFiled: February 1, 2006Publication date: February 1, 2007Inventor: Yoon Park
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Publication number: 20070024240Abstract: An apparatus and method for detecting total voltage of an assembled battery including a number of serially-connected electric cells. Voltages of the respective cells are detected and added up, correlation between the resulting total voltage and a total voltage obtained by detecting the voltage of the assembled battery directly from its terminals is obtained, and a corrective arithmetic operation is carried out inside the device to correct the total voltage obtained through direct detection. The total voltage is detected with a high degree of accuracy without the need for individual adjustment operations using a variable resistance, high-accuracy external tester.Type: ApplicationFiled: July 26, 2006Publication date: February 1, 2007Applicant: Nissan Motor Co., Ltd.Inventors: Tsuyoshi Morita, Utaka Kamishima
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Publication number: 20070024241Abstract: Devices and methods that monitor batteries used in electronic devices are disclosed herein. An embodiment of a device comprises a sample and hold circuit connected between terminals of the battery, wherien the sample and hold circuit comprising a sample and hold output. A comparator comprising a comparator input connected to the sample and hold output and a comparator output. The state of the comparator output changes when the potential of the comparator input crosses a preselected voltage threshold. A processor comprising a processor input is connected to the comparator output. The processor initiates a shut down of the electronic device upon a change of state of the comparator output.Type: ApplicationFiled: July 26, 2005Publication date: February 1, 2007Inventors: Heather Bean, Peter Millett
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Publication number: 20070024242Abstract: A battery management system includes a sensing unit, a controller, an Open Circuit Voltage (OCV) calculator, and a State of Charge (SOC) determination unit. The sensing unit measures a total voltage of the secondary battery. The controller maintains the secondary battery in an open circuit state for a first period of time after a power supply switch is turned on, and couples the secondary battery to an external device when the first period of time ends. The OCV calculator receives the measured voltage from the sensing unit and calculates an OCV of the secondary battery during the first period of time. The SOC determination unit receives the calculated OCV from the OCV calculator and determines an SOC corresponding to the OCV.Type: ApplicationFiled: July 5, 2006Publication date: February 1, 2007Inventors: Se-Wook Seo, Soo-Seok Choi
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Publication number: 20070024243Abstract: Battery protection circuitry and method are disclosed. A battery is protected from a large current overdrawn condition by setting a discharge switch into a controllable conduction state. After the discharge switch is in the controllable conduction state, a tickle discharge current is gradually generated under control of a switch control signal. The trickle discharge current can be used to determine whether the large current overdrawn condition still exists. When the large current overdrawn condition is removed, the discharge switch is turned back on.Type: ApplicationFiled: September 29, 2006Publication date: February 1, 2007Inventors: Liusheng Liu, Bruce Denning
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Publication number: 20070024244Abstract: A system and method of controlling temperature of a vehicle power source. The method includes determining a representative temperature of the power source, determining an ambient zone in which the power source is operating, determining a thermal control action based on the representative temperature and the ambient zone, and adjusting the temperature of the power source based on the thermal control action.Type: ApplicationFiled: July 28, 2005Publication date: February 1, 2007Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Douglas Zhu, William Treharne
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Publication number: 20070024245Abstract: A power supply apparatus for a vehicle is provided. The power supply apparatus comprises a first battery pack and a second battery pack. The power supply apparatus also comprises a first fan proximate to the first battery pack and a second fan proximate to the second battery pack. The power supply apparatus can extend battery life and increase performance through the independent cooling of the first and second battery pack.Type: ApplicationFiled: August 1, 2005Publication date: February 1, 2007Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventor: Douglas Zhu
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Publication number: 20070024246Abstract: A battery charger that includes a relay, a control unit, and a temperature sensor. The relay controls the flow of an electrical charge current from a power supply to one or more batteries. The temperature sensor continuously measures the ambient temperature of the one or more batteries and communicates the temperature measurements to the control unit. The control unit control the actuation of the relay. The control unit receives the temperature measurements from the temperature sensor, determines a charging time period for the one or more batteries, and selectively actuates the relay for the charging time period. The charging time period has a predetermined duration and represents a coolest time period within a monitoring period of the control unit.Type: ApplicationFiled: July 27, 2006Publication date: February 1, 2007Inventor: David Flaugher
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Publication number: 20070024247Abstract: In a power generation apparatus equipped with an AC energization synchronous generator, when energization of a secondary winding starts to conduct connecting to the network of the AC energization synchronous generator to a network voltage, energization of the secondary winding starts at a fixed frequency and a slip frequency is calculated from a difference between a frequency of the network voltage and a resultant stator voltage frequency. Thereafter, energization starts at the calculated slip frequency and a voltage having a frequency generally coincident with the network frequency is output to the stator to incorporate the generator to the network. A phase is adjusted to make zero a phase difference when the rotation speed changes or the phases become different.Type: ApplicationFiled: April 28, 2006Publication date: February 1, 2007Inventors: Masaya Ichinose, Motoo Futami, Shinya Oohara, Kazuhiro Imaie, Mitsugu Matsutake
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Publication number: 20070024248Abstract: A method of calculating torque of a Lundell-type synchronous generator is disclosed in which only power generation output current and a rotational speed are input for calculation of the amount of electric power and the amount of losses for thereby enabling calculation of power generating torque, based on a sum of the amount of electric power and the amount of losses, which is generated as an output. The present method establishes formulae enabling calculation based on only output current and the rotational speed, enabling a minimal number of inputs to shorten a calculation time interval.Type: ApplicationFiled: July 28, 2006Publication date: February 1, 2007Applicant: DENSO CORPORATIONInventors: Atsushi Umeda, Tsutomu Shiga, Kouichi Ihata
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Publication number: 20070024249Abstract: In one aspect, an alternator is described which includes a current control apparatus including a stator winding and a control winding, wherein current control in the control winding regulates the stator winding. In another aspect, a gas turbine engine includes a multiple-channel alternator for redundantly driving accessory systems. In another aspect, an alternator cooling scheme is provided, which alternator includes means for reducing stray inductance of stator winding end turns.Type: ApplicationFiled: September 14, 2006Publication date: February 1, 2007Inventor: Kevin DOOLEY
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Publication number: 20070024250Abstract: A method and apparatus are described for controlling the flow of power in each input line to a three phase AC inductive load in order to reduce the amount of VAR in the system, and thus increase the operational efficiency of the inductive load. Solid state relays are positioned in series in each of the three inductive load line inputs, and current allowed to flow to the inductive load only during the time during which the SSRs are in a conducting state. The calculation of VAR is achieved by processing data from each of the input lines using a separate controller boards each dedicated to each of the lines. The controller in turn, based on the calculated VAR, increments the time, either increasing or decreasing it from a predetermined value, during which the SSRs in that line remains in the non-conducting state.Type: ApplicationFiled: August 1, 2005Publication date: February 1, 2007Applicant: Enviroworld Systems, Inc.Inventor: Hugh Simpson
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Publication number: 20070024251Abstract: The continuous conduction mode (CCM) boost voltage power factor correction apparatus with an average-current control mode of the present invention uses resettable integrators to integrate the difference voltage signal outputted from the voltage error amplifier and the input current signal obtained from detection. The integration results are then compared to control the duty cycle of the switch. Thereby, the input current and the input voltage in the AC/DC electrical power converter have a proportion relation and their phases are the same as each other. The components used in this control method are simpler than the PFC circuit of the prior art. It is easy to integrate in one chip with fewer pins. The apparatus of the present invention has a high power factor and a low total harmonic distortion (THD).Type: ApplicationFiled: October 5, 2005Publication date: February 1, 2007Inventors: Chung-Cheng Wu, Qin Huang, Ning Zhu, Xin Zhang
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Publication number: 20070024252Abstract: A control circuit for a DC/DC converter has a linear-control loop, which receives a quantity to be controlled and a first reference quantity, and generates a modulation value. A nonlinear modulation unit is activated in presence of a variation of the quantity to be controlled higher than a preset intervention threshold and modifies in a nonlinear way the reference quantity supplied to the linear-control loop. In the case of large variation and of preset sign of the quantity to be controlled, the linear-control loop is deactivated, a signal for switching-off of the DC/DC converter is initially generated, and then a false steady-state-modulation value is supplied to the DC/DC converter.Type: ApplicationFiled: July 18, 2006Publication date: February 1, 2007Applicant: STMicroelectronics S.R.L.Inventors: Filippo Marino, Marco Minieri, Giuseppe Di Blasi, Valeria Boscaino
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Publication number: 20070024253Abstract: A multi-phase buck converter comprising a plurality of output switch arrangements each comprising a high side switch and a low side switch connected in series across a DC voltage and having a common connection coupled through a respective output inductor to a converter output node at which a converter output voltage is provided; a plurality of circuit arrangements providing pulse width modulated control signals to the high side and low side switches of each output switch arrangement for regulating the converter output voltage; a control arrangement providing a timing signal for controlling the start of conduction times of the high side and low side switches of each output switch arrangement and for providing an error signal related to a difference between the converter output voltage and a reference signal; a current sense arrangement coupled to each output inductor for providing a phase current signal related to the phase current provided by the respective output switch arrangement through the respective outType: ApplicationFiled: September 11, 2006Publication date: February 1, 2007Applicant: INTERNATIONAL RECTIFIER CORPORATIONInventors: George Schuellein, Dan Clavette, Mark Crowther
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Publication number: 20070024254Abstract: A circuitry comprises a converter means for generating an alternating current signal from an energy from an energy source, a piezo transformer with an input and an output, wherein the input of the piezo transformer is electrically coupled to the converter means, to receive the alternating current signal as an excitation on the input side from the converter means, and wherein the output of the piezo transformer is designed to provide an output current, and a load, which is coupled to the output of the piezo transformer, so that output current flows through the same. The load is designed to convert at least part of the electrical energy supplied by the output current flowing through the load into another form of energy. The load is further designed such that a useful power provided in the form of useful energy is substantially proportional to the output current. The circuitry is designed to adjust the output current to a predetermined value.Type: ApplicationFiled: May 18, 2006Publication date: February 1, 2007Inventors: Matthias Radecker, Michael Lenz
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Publication number: 20070024255Abstract: Enhancement of the power conversion efficiency and reduction of switching noise of a power supply circuit are achieved. The power supply circuit includes, on the primary side, a composite resonance type converter formed from a current resonance type converter and a partial voltage resonance circuit in combination, and is configured so as to produce a plurality of secondary side DC output voltages. A particular one of the plural secondary side DC output voltages is controlled to a constant voltage by variably controlling the switching frequency of a primary side switching converter. Each of the remaining secondary side DC output voltages is controlled to a constant voltage by adjusting the level of control current to be supplied to a controlling winding of a control transformer in response to the level of the secondary side DC output voltage to adjust the inductance of a controlling winding of the control transformer inserted in a rectification current path.Type: ApplicationFiled: November 13, 2003Publication date: February 1, 2007Applicant: Sony CorporationInventor: Masayuki Yasumura
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Publication number: 20070024256Abstract: An integrated converter for converting a DC power source into multiple DC output voltages is provided. In the converter, a voltage regulator is selectively coupled to the power source. A control module outputs a timing signal based on a buck/boost signal. A voltage bucking/boosting module bucks or boosts the power source based on the timing signal. When the buck/boost signal indicates a buck operation, the voltage regulator is operably coupled to the power source to generate an output voltage, and the voltage bucking/boosting module bucks the generated output voltage to generate another output voltage.Type: ApplicationFiled: July 27, 2005Publication date: February 1, 2007Inventor: Yi-Chung Chou
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Publication number: 20070024257Abstract: A control circuit for a switching DC/DC Converter comprising: an input for an indicator signal indicative of an output current level from said converter; a peak detector for detecting and storing a maximum value of said indicator signal; a comparator element for comparing an instantaneous value of said indicator signal with said stored maximum value, and for generating a switching signal when said instantaneous value becomes less than a predetermined fraction of said stored value; reinitializer means for reinitializing said peak detector in response to said switching signal; and means for generating a control signal that switches between a state in which it increases over time and a state in which it decreases over time in response to said switching signal. A control module for photovoltaic generator, the module including such a control circuit, and a photovoltaic generator system comprising a plurality of such modules, each controlling a respective photovoltaic generator.Type: ApplicationFiled: May 2, 2006Publication date: February 1, 2007Inventor: Pablo Boldo