Bizarre Patents
Behavior Modification Wristwatch
A wristwatch including a watch band and a watch body having an octagon shaped perimeter and being red in color and having the word STOP thereon to resemble a stop sign.
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| Number | Title | Issue Date |
| 8115458 | Driver A driver includes a sensor sensing a driving current and a driving voltage for an external device including a capacitor, a PWM, a PFC, and a controller. The PFC includes a phase angle estimation unit estimating a phase angle variation of an input voltage to the PFC ... | 02/14/2012 |
| 8111050 | Power factor control systems and methods A boost converter comprises an inductance that receives an input signal. A switch controls current supplied by the inductance to a load. A power factor control module comprises a mode control module that selects an operating mode of the boost converter and a switch ... | 02/07/2012 |
| 8022678 | Power supply device A power supply device includes first and second power factor correctors, and first and second resonant circuits. The first and second power factor correctors are for receiving an alternating current (AC) input voltage, and are driven by first and second driving sign... | 09/20/2011 |
| 7940029 | Static VAR corrector A system for providing reactive power compensation to a utility power network includes a switch coupled to the utility power network, and a capacitor coupled with the switch for providing a controlled amount of reactive current based on conditions of the utility pow... | 05/10/2011 |
| 7923973 | Method and apparatus to reduce line current harmonics from a power supply A method and apparatus for controlling a power converter. In one aspect, a controller for use in a power converter includes a first calculator coupled to determine an end of an on time of a power switch of the power converter by integrating an input current to outpu... | 04/12/2011 |
| 7919950 | Power factor correction converter A power factor correction converter includes a diode bridge arranged to perform full-wave rectification on an AC input power supply, a switching element arranged to perform switching on an output voltage thereof, an inductor arranged to pass a current interrupted by... | 04/05/2011 |
| 7893663 | Method and apparatus for active power factor correction without sensing the line voltage A power factor correction apparatus which uses Pulse Frequency Modulation (PFM) to control an AC/DC converter is disclosed. Only a current signal from the converter is used to determine the switching frequency. Sensing of the input line voltage is not needed. The sw... | 02/22/2011 |
| 7884582 | Method and device in frequency converter A method in connection with a frequency converter for correcting the power factor of the frequency converter, and a power factor correction unit. The method includes connecting the power factor correction unit between a rectifier bridge of the frequency converter an... | 02/08/2011 |
| 7800348 | Motor drive with VAR compensation Apparatus and methods are disclosed for providing VAR compensation using an AC motor drive, in which an off-line motor drive is configured to prevent power transfer to a motor load output, with a line side converter being operated to control a voltage or current in ... | 09/21/2010 |
| 7759910 | System for transmission of electric power A high voltage AC transmission cable system for transmitting power between two points, each connected to one or more power networks, and a method to operate the system. At least one transformer is arranged at each end of the AC transmission cable, wherein at least o... | 07/20/2010 |
| 7746040 | AC to DC converter with power factor correction An input current shaping AC to DC converter with PFC front end that reduces input current harmonics is provided. In one embodiment, an AC to DC converter connectable with an alternating current source and operable to output a direct current has a PFC front end follo... | 06/29/2010 |
| 7710082 | Controller for the three-phase cascade multilevel converter used as shunt active filter in unbalanced operation with guaranteed capacitors voltages balance The present invention comprises a controller for the cascade H-bridge three-phase multilevel converter used as a shunt active filter. Based on the proposed mathematical model, the controller is designed to compensate harmonic distortion and reactive power due to a n... | 05/04/2010 |
| RE41170 | Voltage regulation of a utility power network Power compensation is provided from a power compensation device to a utility power network carrying a nominal voltage. The power compensation device has a steady-state power delivery characteristic. The power compensation is providing by detecting a change of a pred... | 03/30/2010 |
| 7688041 | Method and apparatus for active power factor correction A power factor correction method and apparatus which use Pulse Frequency Modulation (PFM) to control an AC/DC converter is disclosed. The average current drawn by the AC/DC converter is compared with a reference sinusoidal signal and the error is used to determine t... | 03/30/2010 |
| 7605570 | Bridgeless PFC converter with low common-mode noise and high power density A bridgeless power factor correction converter that can reduce common-mode noise and enhance power density is made up of a boost inductor coupled to an input end, a bidirectional switch connected in series with the boost inductor, a first series rectifying circuit h... | 10/20/2009 |
| 7570029 | Active power conditioner An active power conditioner includes a first power electronic switch set, a second power electronic switch set, a third power electronic switch set, an input filter and an output filter. The active power conditioner can supply a stable AC voltage to a load when a vo... | 08/04/2009 |
| 7567064 | Systems of parallel operating power electronic converters A converter unit is disclosed which produces an output voltage based on reference signals (u*d, u*q) that are generated from active and reactive components (P, Q) of the converter's output power. A first reference signal for a reactive componen... | 07/28/2009 |
| 7508173 | System and method for providing reactive power support with distributed energy resource inverter A reactive power compensation system includes a distributed energy resource situated at a local location configured to also receive power from a remote location by a distribution feeder line. The distributed energy resource includes an inverter including power semic... | 03/24/2009 |
| 7501800 | Power factor correction circuit and output voltage control method thereof Disclosed is a power factor correction circuit for varying an output voltage according to an input voltage, and an output voltage control method thereof. A reference voltage is generated corresponding to a voltage at an output terminal of a boost circuit at a predet... | 03/10/2009 |
| 7466110 | Power factor improving circuit A power factor improving circuit including: a boost reactor that inputs a rectified voltage obtained by rectifying an AC power supply voltage of an AC power supply by a rectifier circuit; a main switch that inputs the rectified voltage through the boost reactor and ... | 12/16/2008 |
| 7446511 | Active power conditioner for AC load characteristics An active power conditioner, connecting with a load and a power source in parallel, includes a DC power capacitor, a power converter, a high-frequency filter and a control circuit. The control circuit detects the voltage of the DC power capacitor and the current of ... | 11/04/2008 |
| 7436155 | Control device for a three-phase machine and method for operating the control device A control device for a three-phase machine contains an inverter, which can be connected on the input side to a direct voltage source and on the output side to the three-phase machine. The control device further has a reactive power converter, which on the output sid... | 10/14/2008 |
| RE40528 | Voltage fluctuation compensating apparatus Voltage compensating circuits are connected serially to a power system, including capacitors each having different charging voltages (in relationship of approximately 2k (K=0, 1, 2, . . . ) times the smallest charging voltage value). The voltage compensat... | 10/07/2008 |
| 7427852 | Low power control mode for power supply Systems and methods are disclosed to mitigate power consumption in a power supply, such as when operating in a low power mode. One aspect of the present invention relates to a control system for a power supply. The system includes a bias generator that provides a bi... | 09/23/2008 |
| 7400517 | Power factor correction circuit and method therefor In one embodiment, a power factor correction circuit is configured to use a stored value of a feedback signal to assist in regulating the value of an output voltage and to bypass the sample and hold circuit if the output voltage increase to an upper limit or decreas... | 07/15/2008 |
| 7397678 | Method for driving a switch that controls current drawn in a power factor correction circuit and a drive circuit therefor The invention relates to a method for provision of a drive signal for a switch which controls the current drawn by an inductive energy storage element in a power factor correction circuit, in which a control signal which controls the power consumption is available. ... | 07/08/2008 |
| 7394226 | High voltage generation systems and methods Systems and methods presented herein generally provide for the controlled voltage of electrical energy through the selected operation of power stages. Generally, a system that provides electrical energy includes a power supply and up to 20 power stages coupled to th... | 07/01/2008 |
| 7388766 | Harmonic control and regulation system for harmonic neutralized frequency changer A control and regulation system for use with a harmonic neutralization frequency changer system. In the generalized frequency changer system, a direct converter frequency changer is used to convert bulk power, but unwanted harmonics are introduced. Input and output ... | 06/17/2008 |
| 7382112 | Methods and devices for input waveform control in switching power supplies The invention recognizes that filter size can be reduced substantially as power factor is permitted to deviate below unity in systematic ways. Preferred methods of the invention provide specific, computable waveforms that permit use of a minimum filter size given a ... | 06/03/2008 |
| 7368891 | Charge control method of capacitor in thyristor converter Charging time of a capacitor is shortened while avoiding erroneous firing due to distortion of a power supply voltage and sustaining an inrush current at a constant level. In the charge control method of a capacitor in a thyristor converter comprising a thyristor fo... | 05/06/2008 |
| 7365451 | Power converter A power converter that can continue to operate after suffering a partial failure. The power converter includes multiple array transformers; normally-on switches connected respectively in series with the ends of each of the primary windings of the array transformers;... | 04/29/2008 |
| 7355373 | DC-DC converter In an up-converter a switching element is controlled both by an integrated control circuit and by a secondary winding on an inductor. High power factor and low total harmonic distortion are achieved while the design of the integrated control circuit is comparatively... | 04/08/2008 |
| 7355296 | Wind turbine generator system To shorten a startup interval to reach a synchronizing condition, a phase difference and an amplitude difference between the grid voltage and the stator voltage of one phase of a winding are obtained. The difference in amplitude is decreased prior to or in parallel ... | 04/08/2008 |
| 7352599 | Switching power source apparatus A power-factor improving circuit applicable to a switching power source apparatus includes a rectifier having a diode bridge, a step-up reactor, a switching element, an output diode, a smoothing capacitor, a controller, and a variable reference voltage generator. If... | 04/01/2008 |
| 7352597 | Comprehensive power quality controller for substation in power system This invention disclosed is a comprehensive power quality controller for substation in the electric power system and includes a Thyristor Controlled Reactor (TCR), pure tuned passive filter Zf, additional inductor L active power filter (APF), and a coupli... | 04/01/2008 |
| 7352161 | Burst-mode switching voltage regulator with ESR compensation System and method for a burst-mode switching voltage regulator with good stability and small output voltage ripple. A preferred embodiment comprises a current sense circuit coupled to a power switch in the burst-mode switching voltage regulator to sense a current fl... | 04/01/2008 |
| 7352158 | SEPIC synchronous rectification A SEPIC converter having synchronous rectification, accommodating changes in the converter duty cycle, and the ringing conditions when the converter changes operation from a continuous mode to a discontinuous mode, and back. Conductive losses are significantly reduc... | 04/01/2008 |
| 7345379 | Power converter with voltage and current fault setting A power converter includes a steady-state controller for outputting a first voltage command such that a detected power value matches a power command, a transient controller for outputting a second voltage command such that a voltage detected before the occurrence of... | 03/18/2008 |
| 7339480 | Power processing interface for passive radio frequency identification system A power processing interface for a radio frequency identification system is provided. The power processing interface includes a resonance circuit for inducing a first signal transmitted from a terminal as an AC voltage, a first rectifier circuit electrically connect... | 03/04/2008 |
| 7332827 | Method for controlling a power-grid connected wind turbine generator during grid faults and apparatus for implementing said method The present invention relates to a method and an apparatus for controlling a power-grid connected wind turbine generator during grid faults. During grid faults, the stator windings of the wind turbine generator are disconnected from the power grid and impedances for... | 02/19/2008 |
