| Patent application number | Description | Published |
|---|
| 20080272658 | INTEGRATED GATE DRIVE FOR USE IN CONTROL AND PROTECTION OF POWER MODULES - A method and apparatus for providing isolated high and low direct current power supplies to a Power Device using a sealed high Power Device Gate Driver having a single transformer, wherein the Gate Driver integrates the power supplies, gating control and gate control, gate drive and Power Device diagnostics into a sealed unit, wherein the unit may be further sealed hermetically. | 11-06-2008 |
| 20080277687 | High power density switch module with improved thermal management and packaging - A semiconductor power device, e.g., an Insulated Gate Bi-polar Transistor (IGBT) or a Metal-Oxide Field Effect Transistor (MOSFET) may be constructed in a reusable and repairable cost-effective sealed shell. The switch may be provided with direct-pressure-contact caps which may perform as electrical conductors for a semiconductor die of the switch and also as thermal heat-sink contacts for the device. The switch may be provided with internal self-powered gate driving control and PHM incorporated in sealed shell. Embodiments of the switch may be constructed with no external gating/PHM connection pin penetrations through the shell. | 11-13-2008 |
| 20080285314 | ADVANCED MATRIX CONVERTER AND METHOD FOR OPERATION - A matrix converter may be provided with AC switches that comprise bi-directional sets of semiconductor switches that are gated with a common gating link. A low loss diode-bridge based snubber may facilitate introduction of time delay between sequential operations of the bi-directional set of semiconductor switches. The matrix converter may be operated in a three-phase mode with only one gating signals for each AC switch, in contrast to prior-art matrix converters which may require use multiple gating signals for each AC switch. | 11-20-2008 |
| 20090079436 | METHOD AND APPARATUS FOR GENERALIZED AC AND DC ARC FAULT DETECTION AND PROTECTION - According to the features discussed herein, through a single generalized arc-fault detection algorithm, various types of series and/or parallel arc faults can be detected without any nuisance trip for either AC or DC Electric Power Systems. Running Discrete Fourier Series (RDFS) formulation for nuisance-free operation and cost-effective implementation is developed. Unlike other methods which require numerous source and load-side current and voltage measurements, only source side current is required. An arc detector may include a first detector to monitor variations of a magnitude of a fundamental component of a current, and a second detector to monitor an overload condition based in an i | 03-26-2009 |
| 20090091302 | METHOD OF CHARGING AND DISCHARGING OF SUPERCAPACITORS WITHOUT THE USE OF CONVERTERS OR CHARGERS - An electrical power system may be provided with temporary power from a bank of supercapacitors connected to a bus of the power system. The supercapacitors may be charged from an output from a primary power source of the system during start-up of the power source. Output voltage of the primary power source may progressively increase and capacitor charging may occur at this progressively increasing voltage. Dedicated current-limiting devices are not required during charging. When temporary power is required the supercapacitors may be discharged sequentially in a series combination so that a high internal voltage of each capacitor is maintained and so that virtually all of the stored energy of the capacitor may be discharged to the bus at a usable voltage. | 04-09-2009 |
| 20090206657 | BATTERY SUPPLEMENTING SUPER CAPACITOR ENERGY STORAGE CHARGE AND DISCHARGE CONVERTER - A super capacitor energy storage supplementing a battery providing power to a direct current bus including charge and discharge converters is disclosed. A bank of super capacitors may be charged by a battery with a pulse-width modulation controller and an electromagnetic interference filter. The bank of super capacitors may be controllably connected to the direct current bus through an isolating transformer implemented as a isolated boost converter. | 08-20-2009 |
| 20100172166 | PLUG-IN NEUTRAL REGULATOR FOR 3-PHASE 4-WIRE INVERTER/CONVERTER SYSTEM - A neutral line regulator is designed as a plug-in module or new integrated inverter with a lower rating 4th-leg, instead of using a conventional four-leg inverter to supply power to three-phase four-wire unbalanced AC loads or three-phase nonlinear loads without a neutral connection. The neutral line regulator may be designed for controlling only the unbalanced power rather than using a fully rated inverter leg. Since this plug-in module may be separate from the main inverter and may operate at a lower power, the switching frequency may be higher than the main inverter. Thus, the size and weight requirements for providing the neutral line can be significantly reduced. In addition, the plug-in regulator may maintain voltage balance between the center-tapped DC link capacitors for non-linear, unbalanced loads. Moreover, the plug-in module may be used as a retrofit module replacing, for example, delta-wye transformers. | 07-08-2010 |
| 20110012607 | METHOD AND APPARATUS FOR GENERALIZED AC AND DC ARC FAULT DETECTION AND PROTECTION - According to the features discussed herein, through a single generalized arc-fault detection algorithm, various types of series and/or parallel arc faults can be detected without any nuisance trip for either AC or DC Electric Power Systems. Running Discrete Fourier Series (RDFS) formulation for nuisance-free operation and cost-effective implementation is developed. Unlike other methods which require numerous source and load-side current and voltage measurements, only source side current is required. An arc detector may include a first detector to monitor variations of a magnitude of a fundamental component of a current, and a second detector to monitor an overload condition based in an i | 01-20-2011 |
