Bizarre Patents
Ballistic resistant body covering
A ballistic resistant body covering for protecting the torso, groin and neck area from ballistic missiles.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8139382 | System and method for integrating local maximum power point tracking into an energy generating system having centralized maximum power point tracking A system for integrating local maximum power point tracking (MPPT) into an energy generating system having centralized MPPT is provided. The system includes a system control loop and a plurality of local control loops. The system control loop comprises a system oper... | 03/20/2012 |
| 8125803 | Signal converter for generating switch drive signals for a multi-level converter, drive circuit, pulse-width-modulation signal generator, multi-level converter, methods and computer program A signal converter for generating switch drive signals for a multi-level converter includes a logic. In the presence of the first polarity, the logic sets the first switch drive signal and the third switch drive signal according to the pulse width modulation input s... | 02/28/2012 |
| 8116105 | Systems and methods for uninterruptible power supply control Systems and methods are provided for distributing power to a load by controlling an uninterruptible power supply that has an inverter and a filter, where the filter has an inductor and a capacitor. The systems and methods apply a pulse width modulation control signa... | 02/14/2012 |
| 8077489 | System and method of cancelling noise radiated from a switch-mode power converter A switch-mode power converter comprises a converter circuit and an auxiliary switching circuit. The converter circuit comprises a storage component configured to temporarily store input energy; and at least one switch configured to control release of the stored ener... | 12/13/2011 |
| 8009446 | Ripple voltage suppression method for DC/DC converter and apparatus thereof A ripple voltage suppression apparatus includes a DC/DC converter and a control circuit. The DC/DC converter has a power electronic switch. The control circuit has a voltage detector detecting a DC output voltage of the DC/DC converter, a ripple voltage suppression ... | 08/30/2011 |
| 7983061 | Switching controller capable of reducing acoustic noise for power converters The present invention provides a switching controller capable of reducing acoustic noise of a transformer for a power converter. The switching controller includes a switching circuit, a comparison circuit, an activation circuit, and an acoustic-noise eliminating cir... | 07/19/2011 |
| 7952897 | System for producing electric power from renewable sources and a control method thereof Described herein is a system for generating electric power, comprising: an electric-power source (1) having a preferential point of operation; a double-stage inverter (3A, 3B), which transfers the energy from said source to an external a.c.-volt... | 05/31/2011 |
| 7948779 | Converter with reduced harmonic waves Converter and method for controlling a converter with power semiconductor switches, having a filter (1) which is connected to the power semiconductor switches and having a drive circuit (4) which is connected to the power semiconductor switches for the... | 05/24/2011 |
| 7920394 | Method to create PWM switching with near zero common mode noise A method for controlling a three-level inverter with a two-level inverter controller uses a conversion circuit to process the two-level control signals and output a set of three-level control signals. ... | 04/05/2011 |
| 7907428 | Digitally controlled current-mode switched power supply Disclosed is a current mode switched power supply. The current mode switched power supply includes a switching element and a power stage coupled to the switching element and configured to provide, in response to the switching of the switching element, an output volt... | 03/15/2011 |
| 7885087 | Modularized active power filter A modularized active power filter includes a control module and at least one power module. The control module automatically identifies the number of parallel connected power modules and generates one set of PWM signals to correspondingly control the parallel connect... | 02/08/2011 |
| 7881080 | Apparatus and method for controlling inverter An apparatus and method for controlling an inverter capable of enhancing reliability of current measurement by ensuring an optimal time for which effective voltage vectors are applied to detect a three-phase current according to a phase current and sizes of the effe... | 02/01/2011 |
| 7881081 | Systems and methods for reducing AC drive common-mode currents Control systems, methods and power conversion systems are presented for controlling common mode currents in power converters, in which feedback signals used in pulse width modulated inverter switching control are selectively adjusted to ensure minimum differences be... | 02/01/2011 |
| 7869233 | Voltage conversion device and computer-readable recording medium having program recorded thereon for computer to control voltage conversion by voltage conversion device A control device calculates a voltage command value of a voltage step-up converter based on a torque command value and a motor revolution number and calculates an on-duty of an NPN transistor based on the calculated voltage command value and a DC voltage from a volt... | 01/11/2011 |
| 7859867 | Method and inverter for converting a DC voltage into a 3-phase AC output A method and inverter (2, 27) for converting a DC input voltage supplied by a DC source (9), which is in particular a solar cell array, into a 3-phase AC output. For each phase (R, S, T) the DC input voltage is converted to a DC output voltage (DCR, DC... | 12/28/2010 |
| 7855901 | AC voltage output apparatus and hybrid vehicle including the same An AC command voltage obtained by compensating a reference value of a commercial AC voltage output from a multiplication unit using an FB control unit is multiplied by k (0≦k≦1) by a multiplication unit and output to a first inverter control unit, and the remain... | 12/21/2010 |
| 7768804 | Inverter and method for controlling output frequency of inverter An inverter includes a counter, a PWM generator, a central controller and a power converter. The counter is used for receiving a frame switch signal to generate a frame counting signal. The PWM generator is coupled to the counter, and is used to select a specific fr... | 08/03/2010 |
| 7738269 | Switching device and related operating method A switching device 30 and a related operating method are disclosed for generate a train of drive pulses under a basic pattern for a repetition cycle time T. The train of drive pulses has leading edges shifted from basic time periods T1 by shift amounts... | 06/15/2010 |
| 7733674 | Power conversion apparatus for converting direct current to polyphase alternating current A power conversion apparatus for converting direct current from a power source to polyphase alternating current includes a plurality of carrier signal generators, a plurality of gate signal generators, and a plurality of legs. The carrier signal generators are confi... | 06/08/2010 |
| 7729140 | Sampling method with adjusting duty ratios A sampling method with adjusting duty ratios is provided and includes the following steps. A first working pulse signal which has a pulse-width duty ratio D in a switching period Ts is provided. A first adjusting period comprising first N successive switc... | 06/01/2010 |
| 7688605 | Systems and methods for reducing the magnitude of harmonics produced by a power inverter Systems and methods are provided for operating a pulse width modulation (PWM) circuit in a direct current (DC) to alternating current (AC) power inverter to reduce the magnitude of harmonics. The PWM circuit operates using a reference signal having an irregular peri... | 03/30/2010 |
| 7649756 | Common mode noise reduction in converter systems through modification of single phase switching signal A method and apparatus for reducing common mode noise in a three phase pulse width modulated (PWM) system, the method comprising the steps of receiving the first, second and third modulating waveforms, identifying one of the modulating waveforms that is at least one... | 01/19/2010 |
| 7646618 | Method and system for controlling pulse width in a night vision system power system A night vision system comprising a power system having a low voltage unit coupled to a high voltage unit; the low voltage unit including a low voltage controller generating a pulse width code; the high voltage unit including an opto-isolator for receiving the pulse ... | 01/12/2010 |
| 7639518 | Device and method for controlling power converting device A control device for a power converting device which performs PWM on an output from a DC power supply and produces an output of AC power, including: a current controller which converts a given current command value into a voltage command value; a carrier generator w... | 12/29/2009 |
| RE41040 | Step switched PWM sine generator Apparatus for generating a high time-varying AC voltage using low voltage power semiconductors arranged in series bridge circuits, each powered by an independent DC source. At least one bipolar output pulse width modulation bridge circuit and at least a pair of bipo... | 12/15/2009 |
| 7633775 | Power conversion system and method A power generation system for supplying a resultant output voltage is provided. The system comprises a power converter system. The power converter system comprises at least two power converter bridges, each configured for switching at a low frequency and generating ... | 12/15/2009 |
| 7626836 | Method and apparatus for adjustable voltage/adjustable frequency inverter control An apparatus and method for controlling an inverter, the apparatus including an adjustable frequency controller receiving a reference frequency value and generating a command frequency value as a function thereof, an adjustable voltage controller receiving a referen... | 12/01/2009 |
| 7626837 | Digitally controlled current-mode switched power supply Disclosed is a current mode switched power supply. The current mode switched power supply includes a switching element and a power stage coupled to the switching element and configured to provide, in response to the switching of the switching element, an output volt... | 12/01/2009 |
| 7599201 | Method of controlling the duty of a PWM signal, PWM signal generating circuit, and image forming apparatus using same A PWM signal generating circuit that generates a PWM signal having a period controlling portion for slightly fluctuating a period of the PWM signal; and a duty controlling portion for changing a duty of the PWM signal by changing a duty ratio in the period fluctuate... | 10/06/2009 |
| 7589984 | Method for starting pulse width modulation A method for starting the modulation of a frequency converter, which method comprises the steps of receiving reference voltages (sa, sb, sc; Uref), generating output switch commands from the reference voltages. The generat... | 09/15/2009 |
| 7558088 | Power supply device A power supply device comprises: a voltage converting portion that converts a voltage generated from a power supply portion into an output voltage to be supplied to a load; a voltage divider circuit that generates an output voltage setting signal for providing a set... | 07/07/2009 |
| 7548439 | Electric power converter for reducing generated high frequency components By reduction in loss and noise of a three-phase reactor on the AC side of an electric power converter, compactness and reduction in weight of the reactor are realized, and countermeasures for heat and noise are reduced, and a specific frequency component is reduced,... | 06/16/2009 |
| 7542312 | Electric power converter By reduction in loss and noise of a three-phase reactor on the AC side of an electric power converter, compactness and reduction in weight of the reactor are realized, and countermeasures for heat and noise are reduced, and a specific frequency component is reduced,... | 06/02/2009 |
| 7518891 | Auxiliary circuit for use with three-phase drive with current source inverter powering a single-phase load An auxiliary circuit for reducing low order current harmonics in a three-phase drive system driving a single-phase load, the three-phase drive system including a three-phase source voltage connected to a rectifier system connected to a DC link choke inductor connect... | 04/14/2009 |
| 7492617 | Frequency control and power balancing in disturbed power inverter system and method thereof A system and method are disclosed for controlling DC to AC power converters (inverters) that are operated as voltage sources and are paralleled on the AC side. This method allows for controlling frequency while sharing real power. The disclosed method requires no co... | 02/17/2009 |
| 7483279 | Apparatus and method for detecting phase currents of inverter The present invention previously sets a threshold voltage, compares the set threshold voltage with a reference voltage, and judges whether a minimal pulse width of a PWM signal is obtained. When a pulse width of one PWM signal is equal to or greater than the minimal... | 01/27/2009 |
| 7480161 | Control apparatus for semiconductor power converter A control apparatus for controlling a three- or single-phase semiconductor power converter employing fixed-pulse switching patterns superposes a DC component on an AC output voltage, to suppress asymmetrical magnetization of a transformer connected to the power conv... | 01/20/2009 |
| 7471526 | Method and apparatus to reduce PWM voltage distortion in electric drives Methods and apparatus are provided for reducing voltage distortion effects at low speed operation in electric drives. The method comprises receiving a first signal having a duty cycle with a range between minimum and maximum achievable duty cycles, producing a secon... | 12/30/2008 |
| 7433404 | Apparatus for higher resolution pulse width modulation duty cycle A pulse width modulation (PWM) generator featuring very high speed and high resolution capability and the ability to generate standard complementary PWM, push-pull PWM, variable offset PWM, multiphase PWM, current limit PWM, current reset PWM, and independent time b... | 10/07/2008 |
| 7433216 | Voltage control and harmonic minimization of multi-level converter A controller applies a pattern of pulses to switching elements within a multi-level controller to effectuate control of the fundamental voltage magnitude and phase associated with the converter, as well as providing harmonic minimization of the 5th and 7 | 10/07/2008 |
