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RE38625 |
Static switch method and apparatus
Method and apparatus for providing alternate current paths to a junction through different sets of gate controlled SCRs coupled to the junction. The method starts with the step of initiating a...
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6795322 |
Power supply with uninterruptible function
A power supply provided with: an AC/DC converter which receives AC power, converts the AC power into DC power, and outputs the DC power; a DC/DC converter which receives the DC power from the AC/DC...
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6795778 |
System and method for facilitating welding system diagnostics
A system and method for facilitating welding system diagnostics is provided. The invention includes a welder, a local system, a remote system, and/or an alarm component. The invention further...
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6791208 |
Electrical power controller
An electrical power controller controls the selection of power sources, backup generator and normal utility line, to an automatically controlled load and other loads during and at the end of a...
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6788000 |
Distributed emergency lighting system having self-testing and diagnostic capabilities
A distributed emergency building lighting system senses the presence or absence of AC power at the input of a switch controlling lighting in a designated area or an input stimulus such as an alarm...
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6788511 |
Domain power notification system
A domain power notification system detects when a power domain experiences a power condition, such as lost power and low-voltage power, and communicates that information to the domains that...
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6787936 |
Semiconductor integrated circuit
A semiconductor integrated circuit includes two power supply lines and at least one electronic circuit connected to each of the power supply lines. One of the two power supply lines is connected...
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6787938 |
Method and circuit for switchover between a primary and a secondary power source
An integrated circuit and method for providing a switchover from the primary power source to the secondary power source to prevent a volatile element from losing stored data. The integrated circuit...
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6781316 |
Vehicle light apparatus
A vehicle light apparatus 1 includes a discharge lamp 7 as a dipped (low)-beam light source and a high-beam light source or a light source of an auxiliary light (incandescent lamp) 3 as a...
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6774507 |
Reliable DC power supply
A highly reliable power supply comprises two independent input power train units each connected to a separate primary winding of a common transformer, and an output power train unit connected to...
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6768224 |
Power supply system
A power supply system includes a main power regulator, standby power regulator and automatic electronic switch. The main power regulator having a first rectifier outputs a first voltage signal to...
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6768223 |
Apparatus and method for rapid fault detection and transfer in a utility-interactive uninterruptible power supply
A method and apparatus are disclosed for improving the disturbance pass through characteristics of a line interactive uninterruptible power supply (“UPS”). One disclosed technique uses a...
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6765314 |
Power management system associated with semiconductor manufacturing facilities
A power management system for semiconductor manufacturing prevents malfunctions of loading devices when transient power interruption occurs by maintaining power to the facilities for a period of...
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6760203 |
Switching power supply with overcurrent protection
A switching power supply with overcurrent protection is provided that comprises a current detection resistor ( 8 ) for detecting electric current through an FET ( 5 ); a capacitor ( 11 ) for...
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6753651 |
Emergency ballast with battery heater
An emergency ballast for a fluorescent lamp including a heater disposed adjacent the battery for maintaining the battery at a safe and effective operating temperature during the time which the lamp...
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6753622 |
Uninterruptible power supply systems and methods using rectified AC with current control
An uninterruptible power supply (UPS) system includes an AC input port, a DC input port, and an output port configured to be connected to an AC load. A rectifier circuit is coupled to the AC input...
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6754835 |
Method and system for providing power fault tolerance in a network of chained computer systems through bidirectional links
A method and system for providing computer system for use in a network having a plurality of computer systems linked in a chain is disclosed. The method and system include providing a power supply,...
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6751109 |
Dual input AC/DC/ battery operated power supply
A dual input battery assisted power converter ( 10 ) which provides a continuous, regulated DC voltage output to a user-connected mobile device, such as, a lap top computer or a cell phone, for...
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6750636 |
Redundant field drive for an electric machine
An electric power generating system comprising: a generator including an alternator and regulator, the regulator including a normal field control and a redundant field control with a default field...
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6746790 |
Power system including heat removal unit for providing backup power to one or more loads
A fuel cell system is described for providing backup power to one or more loads (including without limitation a cooling unit) upon the occurrence of a power outage condition, which includes a...
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6747372 |
Distributed control method for multiple connected generators
An energy generation network according to the present disclosure includes energy generating elements organized in a tree structure of superior and inferior system levels, with control systems and a...
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6741064 |
Power charging system and related apparatus
A power charging system for charging portable electric devices. The power charging system includes a plurality of transformers for transforming a plurality of different input voltages into a...
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6737762 |
Generator with DC boost for uninterruptible power supply system or for enhanced load pickup
A local power generation system generates a substantially DC voltage at an inverter input, which is modulated to generate a resulting output AC power signal to a load. The inverter input voltage...
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6731023 |
Backup power supply for restraint control module
A backup power supply for a restraint control module is disclosed that includes a main power source that is connected to a backup power source charging circuit. A boost converter control and driver...
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6727603 |
Automatic mode transitions for microturbine generating systems
A system and method for controlling a microturbine generator system comprising: providing a computer control unit; providing a utility power grid sensor input line to the computer control unit; and...
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6720673 |
Voltage island fencing
A circuit for fencing input signals to circuits in a voltage island when switching between a normal and a standby power supply is disclosed. A voltage detector detects the switch over in power...
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6717786 |
Automatic voltage source selector for circuit breakers utilizing electronics
Methods and systems for selecting and connecting an electronics package to a power source from one or more of a plurality of possible power source paths. An embodiment of the invention uses...
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6717292 |
Method and structure for measurement of a multiple-power-source device during a test mode
A test mode structure and method of a multi-power-source device provides for the device to remain in a test mode, during which current draw of the device may be accurately measured, even after...
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6693409 |
Control system for a power converter and method of controlling operation of a power converter
A control system ( 20 ) for a power converter ( 22 ) designed to convert DC power from a source ( 30 ) such as a battery, flywheel or fuel cell into AC power. The control system includes an...
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6693806 |
Electric power source
In an electric power source for supplying an electric power from a battery to an electric power line with boosting a voltage generated by the battery so that the electric power of boosted voltage...
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6690095 |
Device for supplying current and/or voltage to a vehicle trailer for the supply of brake components
A device for supplying current and/or voltage to a vehicle trailer for the electric supply of brake components of the vehicle trailer, where the vehicle trailer is connected with the tractor...
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6670779 |
High power factor electronic ballast with lossless switching
An electronic converter receiving low frequency input power, converting this power to DC power at a voltage greater than the input voltage peak, and providing output power from a commutator stage....
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6664656 |
Aircraft electrical power distribution network
A data collection network and electrical power distribution network designed to reduce airplane wire weight and allow nearly complete wiring design and installation of wiring and equipment in the...
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6664659 |
CATV amplifier power supply redundancy
A power supply system that provides redundant power by automatically selecting one power supply as the master power supply. Power supplies configured in parallel share load. The load voltage of the...
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6657416 |
Control system for stand-by electrical generator
A generator structure is provided for generating an AC power for a load. The generator structure includes a generator connectable to a load and an engine operatively connected to the generator for...
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6657320 |
Integrated flywheel uninterruptible power supply system
Integrated flywheel uninteruptible power supply (UPS) systems provide reliable back-up power protection in a single integrated housing unit. The integration of the two normally independent systems...
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6653749 |
Portable power supply system and a method for providing electrical power
Methods and systems for providing a portable source of electrical power are disclosed. These methods and systems include portable power supplies and power synchronizing devices. These methods and...
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6653821 |
System controller and method for monitoring and controlling a plurality of generator sets
In accordance with the present invention, a system controller and method for monitoring and controlling a plurality of generator sets are provided. Each generator set generates electrical power and...
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6653748 |
System and method for controlling an output signal of a power supply
A control system for selectively isolating a power supply from a common bus is provided. The control system comprises a connection to an output path of an output signal of the power supply and a...
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6650967 |
Battery configuration with a click
An automated battery configuration system for a telecommunications power system includes at least one rectifier module, a controller and at least one backup battery. A database system is associated...
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6642632 |
Efficient battery transfer circuit
The present invention is a battery transfer circuit connected to a load, a power supply for powering the load with at least a minimum supply voltage during normal operating conditions, and a source...
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6643152 |
DC power supply device
A DC power supply device comprises an AC/DC converter 1 , a DC/DC converter 2 , and a DC converter 3 converting DC power from a battery 4 to DC voltage for connecting to output terminals of the...
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6639330 |
Transfer relay for computer based equipment
A power switching transfer relay is provided to automatically switch an electrical load, such as that drawn by a computer or other sensitive electrical or electronic equipment, from a primary power...
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6633802 |
Power management under limited power conditions
A vehicle power system includes a multiple of electrical generators which provide power for vehicle electrical systems or loads through an electrical load management center which communicates with...
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6633799 |
Configurable switchgear system
A switchgear system, as well as a method of controlling a switching status of two switches in a switchgear system, are disclosed. The switchgear system includes a first switch capable of...
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6630751 |
Excessive load capacitor detection circuit for UPS
Embodiments of the present invention are directed to an uninterruptible power supply for providing AC power to a load having a capacitive element. In embodiments of the present invention the...
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6630753 |
Low cost redundant AC to DC power supply
The power supply in accordance with the present invention provides AC redundancy while also preventing voltages from multiple AC voltage sources from adding at a common node. The adding of voltages...
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6630752 |
Uninterruptible transfer switch
An uninterruptible transfer switch (UTS) coupled to two or more power sources and a load, said UTS including switches and an inverter, powered through one of several sources routed through...
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6630750 |
Spare bus power plant
A DC power plant system is provided utilizing battery back up for emergency power for use with telephone switching equipment or other loads, whereby the system provides for a more efficient use of...
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6628012 |
Uninterruptible power supply
An uninterruptible power supply system (UPS) includes a coupling choke ( 5 ) being operably arranged between an electrical load ( 2 ) and an external source of power ( 4 ). A generator ( 8 ) is...
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