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| Number | Title | Issue Date |
| 8189356 | PWM inverter There is provided a PWM inverter capable of preventing a phase error from occurring in generating a PWM signal even in the case where a carrier wave frequency is not sufficiently higher than a signal wave frequency. A PWM signal generating section (2) include... | 05/29/2012 |
| 8159849 | Downsized power inverter and housing for a larger heat release value A power inverter comprises at least a box-shaped housing; and a power module, a smoothing capacitor, a base plate made of a flat plate, and a rotating electric machine control circuit board arranged in order in the housing. The base plate is arranged with the fringe... | 04/17/2012 |
| 8154897 | RF power supply An RF power supply, in particular a plasma supply device, for generating an output power greater than 500 W at an output frequency of at least 3 MHz includes at least one inverter connectable to a DC power supply, which inverter comprises at least one switching elem... | 04/10/2012 |
| 8120936 | DC-to-AC power converting device A power converting device is adapted for converting a DC voltage input from an external power source into an AC voltage output. The power converting device includes: a transformer having first and second windings each having opposite first and second ends; a clamp u... | 02/21/2012 |
| 8107269 | Power converter An apparatus to convert a direct current to an alternating current includes a power module disposed between an input terminal of the direct current and output terminal of the alternating current, the power module comprising an on/off switch element, a first smoothin... | 01/31/2012 |
| 8054660 | Inverter module with thermally separated semiconductor devices Systems and apparatus are provided for an inverter module for use in a vehicle. The inverter module comprises a first electrical base and a second electrical base each having an electrically conductive mounting surface, wherein the electrical bases are physically di... | 11/08/2011 |
| 8027183 | 3-phase inverter module, motor driving apparatus using the same, and inverter integrated circuit package A 3-phase inverter module is provided, which includes first and second U-phase switching elements connected in series to each other to constitute a U-phase inverter, first and second V-phase switching elements connected in series to each other to constitute a V-phas... | 09/27/2011 |
| 8023296 | High voltage, high speed, high pulse repetition rate pulse generator A high voltage, high speed, and high repetition rate pulse generator solves the high pulse repetition rate limitations associated with RF power amplifiers. The pulse generator employs resonant techniques to provide current limiting features that allow for continued ... | 09/20/2011 |
| 8000119 | Switching mode power supply and method of operation In one embodiment, an SMPS includes a rectifier for generating an input DC voltage from an input AC voltage. A switching transistor is coupled to a primary coil of a transformer for generating power which is transferred to a second side of the transformer according ... | 08/16/2011 |
| 7965529 | Voltage source inverter and medium voltage pre-charge circuit therefor A medium voltage adjustable frequency drive includes an input isolation transformer having a three-phase input and a three-phase output, a converter having a three-phase input electrically connected to the three-phase output of the input isolation transformer and an... | 06/21/2011 |
| 7881085 | Inverter and programming device thereof It is possible to easily and rapidly develop an inverter application while maintaining stable quality. Executable code modules which have been sufficiently tested are installed in an inverter. An application source code is created on a programming device by using fu... | 02/01/2011 |
| 7755918 | Converter circuit for switching a large number of switching voltage levels A converter circuit for switching a large number of switching voltage levels is specified, in which a first switching group is provided for each. Second switching groups are provided, each having a first, second, third, fourth, fifth and sixth drivable bidirectional... | 07/13/2010 |
| 7751214 | Power control apparatus and method A power control apparatus and power control method that reduce harmonic noise produced when modulating a carrier wave frequency over predetermined cycles. A command value signal is generated for obtaining a desired output voltage, and a carrier wave is output. The f... | 07/06/2010 |
| 7751215 | Semiconductor device and electric apparatus having a semiconductor layer divided into a plurality of square subregions The present invention provides a semiconductor device and an electric apparatus each of which can realize both high-speed switching operation and energy loss reduction and excels in resistance to current concentration based on a counter electromotive voltage generat... | 07/06/2010 |
| 7692938 | Multiphase power converters and multiphase power converting methods A new class of multiphase converters having at least two switching cells driven by out-of-phase PWM reference signals and corresponding respective PWM control signal signals. In some embodiments, once of the switching cells are driven as a function current-balancing... | 04/06/2010 |
| 7599202 | DC-AC converter with feedback signal control circuit utilizing power supply voltage, controller IC therefor, and electronic apparatus utilizing the DC-AC converter An inverter controls the power supplied to a load such as a CCFL connected to a secondary winding of a transformer by means of pulse width modulation (PWM) control of the switches of a semiconductor switching circuit connected to the primary winding of the transform... | 10/06/2009 |
| 7542317 | Semiconductor device and power conversion apparatus using the same The power conversion apparatus uses the semiconductor device. Said semiconductor device includes a first group of power semiconductor elements at least one of which is electrically connected between a first potential and a third potential, a second group of power se... | 06/02/2009 |
| 7460380 | Highly efficient switching power converter using a charge pump to power the drive circuit A switching power converter having a first and a second transistor are connected in series with the transformer to provide higher switching efficiency. A charge pump circuit is coupled to a drive circuit to provide a power source for driving the first transistor. A ... | 12/02/2008 |
| 7436160 | Half bridge adaptive dead time circuit and method A high voltage offset detection circuit registers the voltage at the midpoint of a switching half-bridge and may determine when the midpoint voltage reaches a given value to avoid hard-switching in the half-bridge switches. The midpoint voltage of the switching half... | 10/14/2008 |
| 7414864 | Switching power supply apparatus A switching power supply apparatus includes a first inductor that is serially connected to a primary winding of a transformer, and a second inductor that is arranged so as to apply a voltage of a capacitor with sine waves obtained by rectifying an AC input voltage f... | 08/19/2008 |
| 7411801 | Method and apparatus for controlling voltage linearity of voltage source inverters Methods and apparatus are provided for modifying a pulse width modulation signal controlling a voltage source inverter. The method comprises the steps of determining a duty cycle of the signal, clipping the duty cycle when a modulation index is greater than a minimu... | 08/12/2008 |
| 7400122 | Method and apparatus for reducing audio noise in a switching regulator A switching regulator utilizing on/off control that reduces audio noise at light loads by adjusting the current limit of the switching regulator. In one embodiment, a switching regulator includes a state machine that adjusts the current limit of the switching regula... | 07/15/2008 |
| 7397679 | Inductive transmission of electric energy An inductive electric energy transmission circuit includes: an oscillating circuit; a push-pull circuit including a first switching transistor and a second switching transistor that are configured to alternate a current flow through the oscillating circuit. The circ... | 07/08/2008 |
| 7375984 | Zero voltage zero current switching converter A power converter circuit includes an input switching circuit, an isolation circuit, a rectifier circuit that includes a least a pair of rectifiers, and an output circuit. The input switching circuit receives a first voltage and generates an AC voltage. The isolatio... | 05/20/2008 |
| 7362019 | Vehicle alternator A vehicle alternator for generating electric power has a stator, a rotor, a rectifier, a regulator case, and a cooling fin part. A stator winding is wound on the stator. The rotor is placed on opposite faces to the stator. The rectifier rectifies an alternating curr... | 04/22/2008 |
| 7362600 | Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system includes an electronic power inverter, such as one usable with an uninterrup... | 04/22/2008 |
| 7359219 | Power supply A power supply, including a step-up converter, a resonant converter, and control unit. The step-up converter is connected to the resonant converter; the step-up converter and the resonant converter are each connected to the primary control unit. ... | 04/15/2008 |
| 7359222 | Method and apparatus to improve regulation of a power supply Techniques are disclosed to regulate a power supply with a compensation signal generation circuit. One example regulated power supply includes a sense circuit coupled to sense an output voltage of the regulated power supply. The regulated power supply also includes ... | 04/15/2008 |
| 7355864 | Switching regulator and its control method A switching regulator has an input voltage detection circuit which inputs a voltage applied to a rectifier diode 7 connected in series with the secondary side of a transformer and generates a voltage signal Vvp corresponding to the voltage, and a calculation ... | 04/08/2008 |
| 7339801 | Switching power supply circuit The present invention provides a voltage resonant converter that achieves ZVS over the entire allowable load range. A switching power supply circuit includes a class-E resonant converter as its primary-side switching converter that is supplied with a DC input voltag... | 03/04/2008 |
| 7336510 | Method and system for increasing load start-up capability of a DC-to-AC converter A power system for increasing a load start-up capability of a DC/AC converter includes a DC/AC converter, a processor coupled to the DC/AC converter and a memory subsystem coupled to the processor. The memory subsystem stores code that when executed by the processor... | 02/26/2008 |
| 7336057 | DC/DC converter A DC/DC converter includes: a boost converter that boosts an input voltage in accordance with a first control signal; an insulated converter that converts an output of the boost converter in accordance with a second control signal; a current sensor that detects an o... | 02/26/2008 |
| 7333353 | Isolating type self-oscillating flyback converter with a soft start loop An isolating type self-oscillating flyback converter is disclosed, which includes a coupled transformer, a FET, a transistor and an electro-optical coupled isolating feedback unit, wherein the input terminal of the circuit is connected to the source of the FET throu... | 02/19/2008 |
| 7332882 | Motor drive device that combined charge controller 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... | 02/19/2008 |
| 7315162 | Reducing power consumption of electrical meters The invention contemplates an electrical power meter and method of operating the electrical power meter. The inventive power meter includes a power supply for converting alternating current (AC) voltage to a direct current (DC) voltage for powering the electronic co... | 01/01/2008 |
| 7315462 | Stabilized power supply A stabilized power supply for X-ray tubes having a first rectifier circuit, an inverter circuit comprising main switches, a transformer, a second rectifier circuit an oscillation circuit and an inverter circuit. The power supply includes an auxiliary circuit that ca... | 01/01/2008 |
| 7310247 | Method for controlling transformer excitation cycles and circuit for controlling the same The present invention discloses a method for controlling transformer excitation cycles and a circuit for controlling the same, wherein the excitation cycle and the demagnetization cycle, which determine the rise and fall of the excitation current, are modified to pr... | 12/18/2007 |
| 7309850 | Measurement of current-voltage characteristic curves of solar cells and solar modules A solar cell or solar module is measured during a short pulse of light in such a way that the resulting data for current and voltage at each light intensity is the same as would be measured under steady-state illumination conditions and therefore predictive of the a... | 12/18/2007 |
| 7309977 | System and method for an adaptive synchronous switch in switching regulators Techniques for an adaptive synchronous switch in switching regulators are described, one aspect of which is to achieve a more optimal on/off timing of a synchronous switch that is controlled by the comparator in a feedback control loop and thereby improves power con... | 12/18/2007 |
| RE39933 | Power conversion integrated circuit and method for programming A single input pin (48) provides multi-functional features for programming a power supply (10). By connecting the appropriate interface circuit (92, 100, or 112) to the single input pin (48), the power supply (10) is program... | 12/04/2007 |
