Patent application number | Description | Published |
20080238520 | POWER ELECTRONIC MODULE INCLUDING DESATURATION DETECTION DIODE - A power electronic module includes: a switch module including a desaturation detection diode and a power semiconductor switch, and wherein the desaturation detection diode is coupled to a switching connection of the power semiconductor switch; and a driver module coupled to the switch module, wherein the driver module is configured for obtaining a voltage signal across the desaturation detection diode and the power semiconductor switch and configured for turning off the power semiconductor switch upon the voltage signal exceeding a threshold. In one example, the driver module is discrete from the switch module. In another example, the switch module and driver modules are configured to respectively provide and receive a voltage signal of less than or equal to seventy volts. | 10-02-2008 |
20080257397 | SYSTEM, METHOD, AND APPARATUS FOR EXTRACTING POWER FROM A PHOTOVOLTAIC SOURCE OF ELECTRICAL ENERGY - System, method, and apparatus are provided for harvesting electrical energy from a photovoltaic source of electrical energy. The photovoltaic source has power-generating characteristics defined by a family of voltage-current curves comprising points of maximum electrical power over a respective range of at least one of the following for the photovoltaic source: distinct illumination intensities and distinct temperatures. The apparatus is made up of a switching converter coupled to the photovoltaic source. The converter has an input voltage-current curve having a predefined functional relationship between the input voltage and the input current. The predefined functional relationship of the input voltage-current curve of the converter is configured to provide during operation of the converter an approximation with respect to at least some of the points of maximum electrical power for the photovoltaic source without having to perform current and voltage calculations corresponding to a maximum power from the photovoltaic source. | 10-23-2008 |
20080285205 | INTEGRATED INDUCTOR AND CAPACITOR COMPONENTS AND METHODS OF MANUFACTURE - An integrated inductor and capacitor component is provided and includes a number of tapered conductors. Neighboring ones of the tapered conductors are separated by a gap extending along a length of the component. A first one of the tapered conductors is characterized by a first width w | 11-20-2008 |
20090154056 | Low inductance capacitor and method of manufacturing same - A film capacitor includes metallization that is sectionalized, patterned and configured to provide interconnections on only one face of a rolled or stacked film capacitor. | 06-18-2009 |
20090231890 | Boost converter input ripple current reduction circuit - A boost inductor value reduction circuit is integrated into a traditional boost power converter to greatly reduce undesirable high frequency harmonics from being fed back to the input side of the boost power converter. The boost inductor value reduction circuit is very small when compared with traditional filter techniques, is less costly than traditional filter techniques, and does not degrade the boost power converter control performance. It can also be used to reduce the size of the boost inductor without compromising the converter performance for use in energy efficient sensitive applications such as photovoltaic inverters. | 09-17-2009 |
20090296434 | High efficiency, multi-source photovoltaic inverter - A photovoltaic (PV) inverter system operates continuously in a buck converter mode to generate a sum of full wave rectified sine wave currents at a current node common to a plurality of buck converters in response to a plurality of full wave rectified sine wave currents generated via the plurality of buck converters. The PV inverter system increases the level of the voltage sourcing each buck converter when a corresponding DC power source voltage is lower than the instantaneous voltage of a utility grid connected to the PV inverter system. | 12-03-2009 |
20090323379 | High efficiency photovoltaic inverter - A photovoltaic (PV) inverter includes a single DC to AC converter configured to operate solely in a buck mode for PV array voltage levels greater than a connected power grid instantaneous voltage plus converter margin, and further configured to operate solely in a boost mode for PV array voltage levels plus margin less than the connected power grid instantaneous voltage, such that the PV inverter generates a rectified sine wave current in response to the available PV array power, and further such that the PV inverter generates a utility grid current in response to the rectified sine wave current. | 12-31-2009 |
20100071742 | Quasi-AC, photovoltaic module for unfolder photovoltaic inverter - A photovoltaic (PV) energy system includes a pulsed bus defined by a non-zero average value voltage that is proportional to a rectified utility grid AC supply voltage. The PV energy system also includes a plurality of PV modules, each PV module including a bucking circuit configured to convert a corresponding PV voltage into a pulsing current, wherein the pulsating bus is configured to sum the pulsing currents produced via the plurality of PV modules such that a resultant pulsing current is injected into the pulsating bus in phase with the non-zero average value voltage. A current unfolding circuit is configured to control the amount of AC current injected into the utility grid in response to the resultant pulsing current. | 03-25-2010 |