Patent application number | Description | Published |
20090243558 | ELECTRONIC BALLAST WITH HOLD-UP ENERGY STORAGE - An electronic ballast is provided, which includes an energy hold-up circuit that maintains operation of an AC discharge load, such as a gas discharge lamp, during at least a portion of a utility source outage. | 10-01-2009 |
20090251060 | ELECTRONIC BALLAST SYSTEM WITH LAMP INTERFACE NETWORK - An electronic ballast is provided, which includes first and second output nodes, first and second lamp outputs, and a lamp interface network. The lamp interface network includes an LC circuit coupled between at least one of the first and second output nodes and a respective one of the first and second lamp outputs. | 10-08-2009 |
20100073980 | POWER CONVERTER ASSEMBLY WITH ISOLATED GATE DRIVE CIRCUIT - A power converter assembly is provided. The power converter includes at least one switch, a high frequency oscillator coupled to the at least one switch and configured to generate a high frequency waveform based on direct current (DC) power provided thereto, and a power buffer coupled to the at least one switch and the high frequency oscillator and configured to control the operation of the at least one switch based on the high frequency waveform | 03-25-2010 |
20100078997 | AUTOMOTIVE ELECTRICAL SYSTEM FOR COUPLING POWER CONVERTERS WITH A TRANSFORMER - Systems and/or apparatus are provided for automotive electrical systems having power converters that are coupled by using a transformer. An electrical system comprises a boost converter, wherein a first winding of a transformer is coupled between the input node of the boost converter and a first reference node. The boost converter further includes a switch coupled between the first reference node and a second reference node and a diode coupled between the first reference node and the output node of the boost converter. An energy source is coupled between the input node and the second reference node and a first electrical load is coupled between the output node and the second reference node. The electrical system further comprises a voltage converter having an input coupled to a second winding of the transformer, and a second electrical load coupled to the output of the voltage converter. | 04-01-2010 |
20100102638 | SYSTEMS AND METHODS FOR DISCHARGING BUS VOLTAGE USING SEMICONDUCTOR DEVICES - Systems and methods are provided for discharging a high-voltage bus using semiconductor devices. A discharge system for a first voltage rail and a second voltage rail comprises a first semiconductor device coupled to a first voltage rail and a second semiconductor device coupled between the first semiconductor device and a second voltage rail. A control circuit is coupled to the first semiconductor device and the second semiconductor device. In response to a discharge condition, the control circuit is configured to activate the first semiconductor device and gradually activate the second semiconductor device, such that the energy potential between the first voltage rail and the second voltage rail is gradually dissipated through the semiconductor devices. | 04-29-2010 |
20110025248 | MULTI-PHASE DC/DC BOOST CONVERTER - A method and an apparatus are provided for balancing current for each of a plurality of similar phases of a DC/DC boost converter. The method includes the step of measuring a voltage drop of each of the plurality of similar phases at predetermined times by measuring the voltage drop across each phase switching device when current is flowing through the switch. The method also includes the steps of calculating current information for each of the plurality of similar phases in response to the voltage drop measured for each of the plurality of similar phases and balancing current for each of the plurality of similar phases in response to the current information of each of the plurality of similar phases. | 02-03-2011 |
20130255910 | VEHICLE OR ENVIRONMENT-CONTROLLED UNIT HAVING A MULTIPHASE ALTERNATOR WITH A PROTECTED HIGH-VOLTAGE BUS - A mobile environment-controlled unit, such as an over-the-road compartment trailer, having an environmental-control system, such as a refrigeration unit, powered by an alternator and having a high-voltage alternating current (AC) bus. The unit incorporates a high resistance ground scheme and can incorporate a solid-state input module to detect phase-chassis faults. This combination provides an improvement in protection for mobile applications that cannot have a voltage reference (or neutral point) solidly connected to earth ground. | 10-03-2013 |
20140339844 | VEHICLE OR ENVIRONMENT-CONTROLLED UNIT HAVING A MULTIPHASE ALTERNATOR WITH A PROTECTED HIGH-VOLTAGE BUS - A mobile environment-controlled unit, such as an over-the-road compartment trailer, having an environmental-control system, such as a refrigeration unit, powered by an alternator and having a high-voltage alternating current (AC) bus. The unit incorporates a high resistance ground scheme and can incorporate a solid-state input module to detect phase-chassis faults. This combination provides an improvement in protection for mobile applications that cannot have a voltage reference (or neutral point) solidly connected to earth ground. | 11-20-2014 |