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| Number | Title | Issue Date |
| 8159847 | Method and arrangement in connection with a brake chopper A method of controlling a brake chopper and a control arrangement, the brake chopper being connected between the positive and the negative rails of an intermediate voltage circuit feeding an inverter bridge, wherein current measurement means are arranged between a D... | 04/17/2012 |
| 8154893 | Three-phase power converting apparatus A three-phase inverter circuit including a DC portion including capacitors connected between output terminals of a solar battery and single-phase inverters connected in series with AC output lines of the three-phase inverter circuit that together constitute an inver... | 04/10/2012 |
| 8144492 | Current controlled power converter A current controlled power converter includes a converting part configured to convert a three-phase ac voltage into a dc voltage or converts a dc voltage into a three-phase ac voltage, ac side current detection portions configured to detect an ac side current of the... | 03/27/2012 |
| 8134850 | Systems and methods for frequency control of a voltage converter Various embodiments of the present invention provide voltage converters and methods for using such. As one example, a voltage converter is disclosed that includes a transformer, an operational detector, and a controllable oscillator. The transformer includes a first... | 03/13/2012 |
| 8059434 | Power conversion device and control method thereof A power conversion device is provided for converting a DC voltage to an alternating current corresponding to an AC voltage according to the AC voltage, which includes a power conversion unit and an output unit. The power conversion unit converts the DC voltage to a ... | 11/15/2011 |
| 8031497 | Three-leg power converter apparatus A three-leg power converter apparatus including first, second and third input/output ports, a three-leg bridge converter, a filter circuit, a decoupling circuit and a controller is presented. The three-leg bridge converter has three single-leg circuits, two DC termi... | 10/04/2011 |
| 8027179 | Inverter circuit and method for operating the inverter circuit An inverter circuit having a primary circuit with a first choke for periodically connecting a primary winding to a DC voltage present at an input of the inverter circuit, a secondary circuit with a secondary winding, the secondary winding arranged in series with a f... | 09/27/2011 |
| 8027181 | Load drive device and vehicle equipped with the same A surge voltage generated by the switching operation of an IGBT element and voltage variation generated in an equivalent series resistance of a capacitor are superimposed on an input voltage of an inverter. The equivalent series resistance has a temperature dependen... | 09/27/2011 |
| 8027180 | Power generating apparatus A power generating apparatus including an AC generator that supplies electric power to a load including a voltage accumulating means, an inverter that applies AC control voltage to armature winding of the generator from the voltage accumulating means, and a controll... | 09/27/2011 |
| 7974113 | Electric power unit for induction heating Reverse conducting type semiconductor switches are arranged in a bride from, an energy storage capacitor is connected with its DC terminal to obtain a magnetic energy regeneration switch, and then an induction coil is connected to its AC terminal. An AC pulse curren... | 07/05/2011 |
| 7969757 | Apparatus providing bias to solar cells Solar panels of certain technologies may experience a degradation of their efficiency as a result of exposure to sunlight, either prior to installation or during normal operation. A direct current to pulse amplitude modulated (“PAM”) current converter, denominat... | 06/28/2011 |
| 7952900 | H-bridge buck-boost converter An H-bridge buck-boost converter includes a first half-bridge portion having at least one first transistor, an inductor portion connected to the first half-bridge portion at a first connection, a second half-bride portion connected to the inductor portion at a secon... | 05/31/2011 |
| 7920395 | Pulse width modulation method for a power converter A pulse width modulation method has the steps of operating a second instruction signal so that each of the differences between two or three arbitrary instruction signals in three first instruction signals may become more than the predetermined value, and modulating ... | 04/05/2011 |
| 7885089 | Electric power generation and conversion with controlled magnetics A power conversion system comprises: a source of multiphase high frequency alternating current (AC) electrical input power; a high frequency controlled magnetics transformer for each phase of the multiphase high frequency AC input power, with each transformer having... | 02/08/2011 |
| 7881084 | DC/AC cold cathode fluorescent lamp inverter A DC/AC cold cathode fluorescent lamp (CCFL) inverter circuit includes a transformer with a primary winding and a secondary winding for providing increased voltage to a CCFL, a first and second MOSFET switches for selectively allowing direct current of a first polar... | 02/01/2011 |
| 7872888 | Electric power conversion system An electric power conversion system includes a DC power supply, plural main circuit switching devices bridge-connected to carry out DC/AC convert, having freewheeling diodes connected in reverse parallel thereto, respectively, and a reverse voltage application circu... | 01/18/2011 |
| 7787272 | Inverter based storage in dynamic distribution systems including distributed energy resources A microsource is provided, which includes an inverter, an energy storage device, and a controller. The controller calculates a maximum frequency change for the inverter based on a first comparison between a first power set point and a measured power from the inverte... | 08/31/2010 |
| 7773397 | Method and system of controlling a power inverter Methods and systems for controlling a power inverter are provided. In accordance with one embodiment, a system for converting a direct current into an alternating current may include a switching module, a sensing module, and a control module. The switching module ma... | 08/10/2010 |
| 7760527 | Device and method for controlling an electric power converter The control device of an electric power converter comprises a control circuit controlling turn-on of power semi-conductor arms. The control circuit comprises a module for determining possible turn-offs of an arm, and a module for selecting turn-offs enabling double ... | 07/20/2010 |
| 7751210 | Inverter device with improved 3-phase pulse width modulation and vehicle air conditioner using the same The inverter device contains three sets of series circuit formed by connecting two switching elements (2) in series between a positive terminal and a negative terminal of DC power supply (1). Connecting points of the two switching elements are connecte... | 07/06/2010 |
| 7733679 | Method for setting switching times, in particular idle times, of an inverter based on detected power, and inverter A method for an inverter, for inputting power output by a direct current voltage source in an alternating current voltage network chops the direct current voltage source by a bridge inverter by alternate switching of parallel-mounted and series-mounted circuit eleme... | 06/08/2010 |
| 7729146 | Power converter control and power conversion method A power converter and power conversion method wherein operation of a switching element is controlled by the frequency of a carrier wave where the frequency is varied such that the same frequency of the carrier wave is not repeated during a single modulation period. | 06/01/2010 |
| 7724553 | DC-to-DC converter with improved transient response A DC-to-DC converter with improved transient response, accuracy and stability is disclosed. The DC-to-DC converter includes a comparator, a driver, at least one switch and a stability circuit. The stability circuit receives a voltage signal based upon sensing one of... | 05/25/2010 |
| 7724554 | DC-AC converter and controller IC thereof A semiconductor switch circuit is connected to a primary winding of a transformer having a secondary winding connected to a load. The semiconductor switch circuit has switches controlled by PWM to provide a controlled constant current. In the inventive inverter, con... | 05/25/2010 |
| 7692940 | Voltage conversion device A voltage transformer, which is placed between a DC power source (B) and a motor (M1), includes: a voltage sensor (10) and an electric current sensor (11), which senses input and output of electric power to and from the DC power source (B); a bu... | 04/06/2010 |
| 7679944 | Motor drive To provide a motor drive adapted to operate stably and suffer essentially no damage, even when a high voltage is applied between grounding terminals of upper and lower arms. The motor drive of this invention includes: an arm with a first electric power semico... | 03/16/2010 |
| 7672148 | Controller and method for frequency-varying control of power converter A controller and method changing a frequency of a control (or carrier) signal in accordance with a waveform that periodically changes within a first frequency range from a frequency fc1 to a frequency fc2, where the frequency fc1 is smaller than... | 03/02/2010 |
| 7672149 | Device for feeding electrical energy from an energy source A device (1) for feeding electrical energy from an energy source with variable source voltage into an electric power supply network (15), said device (1) including a transformer (112) for galvanic isolation, a resonant inverter (11... | 03/02/2010 |
| 7660139 | Output power factor control of pulse-width modulated inverter An inverter operable to supply high power factor electrical power to an AC load including an AC power grid includes a DC bus and a DC to AC converter section of the full bridge type. The inverter further includes a voltage sensor configured to produce an instantaneo... | 02/09/2010 |
| 7652899 | Switching sequence control method for a PS-ZVT bridge converter The switching sequence of a phase-shifted zero-voltage-transition (PS-ZVT) full bridge converter circuit is alternated between two modes by periodically reversing the switching sequence for diagonally opposed switching devices of the bridge. Over a period of operati... | 01/26/2010 |
| 7649758 | Power supply apparatus, methods and computer program products using D-Q domain based synchronization techniques A value of an AC reference waveform is obtained and converted to a d-q reference frame value. A phase estimate is generated responsive to the d-q reference frame value. An AC output of the power supply apparatus is controlled responsive to an output current of the p... | 01/19/2010 |
| 7630222 | Inverter apparatus with adaptable voltage-to-frequency control An inverter apparatus has an adaptable high-resolution voltage-to-frequency (V/f) control. The inverter apparatus receives an analog input signal and includes a first circuit, a second circuit, a third circuit, and a micro-controller unit. The first circuit processe... | 12/08/2009 |
| 7589986 | Single stage integrated boost inverter motor drive circuit An integrated boost inverter circuit including at least one inverter stage having series connected high- and low-side switches having a common node. Each switch having an anti-parallel connected diode connected across the switch, which diode can be an external diode... | 09/15/2009 |
| 7583523 | Three phase inverter control circuit detecting two phase currents and deducting or adding identical ON periods A small and highly vibration-proof inverter capable of detecting a phase current without requiring the development of complicated control software and without causing any current distortion is provided. Shunt resistors (15, 16) serving as a kind of current de... | 09/01/2009 |
| 7548440 | Power and information signal transfer using micro-transformers A power converter provides power across an isolation barrier, such as through the use of coils. A coil driver has transistors connected in a positive feedback configuration and is coupled to a supply voltage in a controlled manner by measuring the output power and o... | 06/16/2009 |
| 7535740 | Electronic apparatus and power circuit having reduced switching loss An electronic apparatus having a load including: a power supply unit supplying a driving voltage to the load; an inverter unit switching the driving voltage; and a control voltage supply unit outputting a first control voltage lower than a reference voltage applied ... | 05/19/2009 |
| 7529111 | Drive controller for a self-commutated converter A drive controller for a self-commutated converter providing a “safe stop” is described. The converter has two half-bridges, and the drive controller includes two control circuits having outputs operatively connected to respective converter valves of the half-br... | 05/05/2009 |
| 7515446 | High-efficiency adaptive DC/AC converter A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasit... | 04/07/2009 |
| 7515445 | High-efficiency adaptive DC/AC converter A CCFL power converter circuit is provided using a high-efficiency zero-voltage-switching technique that eliminates switching losses associated with the power MOSFETs. An optimal sweeping-frequency technique is used in the CCFL ignition by accounting for the parasit... | 04/07/2009 |
| 7508689 | Inverter and a drive system using the inverter A inverter has a switching device for switching DC to change it to AC, and a bipolar type rechargeable battery connected to the switching device in parallel or in series for smoothing the current from the switching device. ... | 03/24/2009 |
