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7492058 |
Modular uninterruptible power supply with loadsharing between modules
In the preferred embodiments, an uninterruptible power supply has multiple UPS modules connected in parallel. Each module has an AC-DC-AC converter and a subcontroller for controlling the operation...
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7492057 |
High reliability DC power distribution system
A high voltage DC power distribution system that eliminates static switches and batteries. Flywheel energy storage devices and extremely reliable, high power DC/DC converters provide at a lower...
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7486033 |
Lighting device
A lighting device including: a power management module connected with and processing alternating-current power and outputting direct-current power; a light source driving module receiving and...
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7485988 |
Uninterruptible power supply
Disclosed is an uninterruptible power supply including a switch connected between an external power source and a load, a power supply module connected to the external power source and the switch...
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7482815 |
Method of operating a shielded connection, and communication network
To provide a method of operating a shielded connection where signals are exchanged between two nodes ( 1 ) on a communications network over a connecting line ( 5 a, 5 b ) and the connecting line (...
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7468567 |
Power switching apparatus and network equipment
The invention provides a power switching apparatus used in a network equipment in order to switch power generated by the Ethernet and an D.C. power supply. The power switching apparatus comprises a...
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7462954 |
Apparatus for providing high quality power
There is provided a system that includes (a) a power feed that distributes a high DC voltage in a building, where the high DC voltage is in a range of about 300 to 600 VDC, (b) a converter, coupled...
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7462955 |
Electrical power distribution system and method thereof
A system for providing auxiliary electrical power is provided. The system includes a plurality of loads and a plurality of power sources, each providing electrical power to one or more of the...
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7459803 |
Iso-parallel UPS system configuration
An Iso-Parallel UPS system may combine the system redundancy, isolation and fault-limiting properties of isolated-redundant systems, with the ability to spread system load evenly across all modules...
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7456520 |
Control system, method and product for uninterruptible power supply
A method for controlling an uninterruptible power supply (UPS) for servicing a load is disclosed. The UPS has a bypass feed path operable in parallel with an inverter feed path, the bypass feed...
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7456604 |
Electric power control apparatus, power generation system and power grid system
An electric power control apparatus outputs output from a power generation apparatus to a power system has a power converter that converts power output from the power generation apparatus and a...
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7456608 |
Battery-driven screwdriver
A cordless screwdriver having a housing ( 12, 18 ), having a handle ( 14 ), in particular one that is angled in pistol fashion, having a preferably permanently installed rechargeable battery ( 40...
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7456519 |
Power conversion system
A power conversion system includes a power generating apparatus, an auxiliary generation device that consumes power, an auxiliary-devised power source, a secondary battery device chargeable and...
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7456518 |
Method and apparatus for providing uninterruptible power
Methods and apparatus for providing uninterruptible power are provided by aspects of the invention. One aspect is more particularly directed to an uninterruptible power supply for providing power...
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7453169 |
Integrity testing of isolation means in an uninterruptible power supply
An uninterruptible power supply wherein an isolation device is automatically tested during normal operation to ensure that it is capable of effectively isolating the input from an auxiliary power...
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7450568 |
System and method for managing a VolP network
The invention provides a system and method for improved management of VoIP networks. In one respect, embodiments of the invention provide a dual channel interface between a control unit and an...
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7446432 |
Electronic device having path of power supplied to display part switched according to whether external power is supplied
An electronic device operable from one of an external power supply and a battery. The electronic device includes a display part, a power converter, an inverter generating an operating voltage for...
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7446437 |
Apparatus and method for preventing an electrical backfeed
At least one aspect is directed to a transfer switch including a first input to couple a first multiphase low voltage electrical supply to the transfer switch, and a second input to couple a second...
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7443055 |
Systems and methods for providing redundant voltage regulation
Systems and methods for providing redundant voltage regulation are provided. A representative method incorporates: providing a first voltage regulator and a second voltage regulator, the second...
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7435920 |
Automatic transfer switch with double throw air circuit breaker
An automatic transfer switch with a double throw air circuit breaker is disclosed, which consists of a unit able to automatically disconnect a preparatory power when a contact point is connected...
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7436079 |
Power system for a telecommunications site
A reliable power supply solution for a telecommunications site provides a combined primary and backup source of electrical power. One system of the power supply solution includes one or more...
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7432615 |
Uninterruptable power supply system and method
Methods and apparatus for delivering uninterruptible power to loads are provided. One aspect on the invention is directed to a system for providing power to a load. The system includes a first...
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7429807 |
Adjustable speed drive system for primary loop recirculation pump
An adjustable speed drive system for a primary loop recirculation pump capable of keeping a PLR pump operating even if a single malfunction occurred in a main adjustable speed drive circuit...
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7420294 |
Smart power switch for broadband communications network
A power switching module provides power to a line amplifier in a broadband telecommunications network. The switch includes a first input port for connection to a first power source, a second input...
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7418314 |
Methods and apparatus for providing and distributing standby power
Aspects of the invention are directed to power distribution systems and methods for distributing power from a primary power source and a backup power source to a load. In one particular aspect, a...
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7414330 |
Power switch device
A power switching device which is used to receive plenty of input voltage and output a switch voltage is provided. The device comprises a first switching unit, a second switching unit, and a...
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7411314 |
Automatic shut off of backup power source in the extended absence of AC power
A system is provided with the ability to automatically shut off a backup power source from further sourcing power for the system, when AC is absent, after the backup power source has sourced power...
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7411313 |
Controller for plural supplies driving single load
A controller is disclosed for determining that the currents from the two AC power sources are correctly phased. Required circuitry can be disposed within a housing from which extend power cables...
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7408271 |
Power interface box
An isolated ground interface apparatus for providing a remote termination point for isolated ground conductors. The isolated ground interface apparatus includes an isolation transformer, a...
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7405488 |
Power generator
There is provided a power generator including a plurality of power generation elements, and a fuel supply portion that communicates with the plurality of power generation elements through a fuel...
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7402766 |
Panel transfer switch
A transfer switch is provided for transferring the supply of electrical power to a load between a utility source and a generator that generates electrical power when started. The load is...
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7402921 |
Method and apparatus for providing uninterruptible power
At least one aspect is directed to an uninterruptible power supply that includes a first input to receive a first input voltage from a first voltage source, a second input to receive a second input...
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7394169 |
Power distribution system
A power distribution system and method may include a first power domain having a first plurality of power rails, a second power domain having a second plurality of power rails, where the first...
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7394674 |
Backup power supply with parallel AC power source and DC power source
Provided is a backup power supply comprising at least one DC/DC power electrically connected to a DC power source for taking DC current therefrom prior to providing regulated DC current, at least...
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7388304 |
Power supply system and electronic device comprising the same
A power supply system generates drive power and supplies the drive power to a load. The system includes an electric power generating part having at least a power generation section which has a fuel...
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7382063 |
Uninterruptible power source for a barrier operator and related methods
An uninterruptible power source (UPS) for supplying power to a barrier operator when mains power has failed is disclosed. The UPS includes a UPS controller for detecting and responding to a mains...
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7378756 |
Battery backup electric plug with female plug
A plug which is attached to a power cord of an appliance, such as a clock or an appliance having an internal clock, includes a battery that will supply power to the appliance during a failure of...
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7370666 |
Power system with computer-controlled fuel system
The present invention is a fuel-control system for a turbine which includes a programmable logic controller. The controller manages utility and stored natural gas sources using a surge tank and...
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7368834 |
Electronic protection devices for automatic circuit-breakers
Described herein is an electronic protection device for automatic circuit-breakers comprising: a control unit; a warning interface; a supply system comprising a main supply system and a first...
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7368835 |
Power distribution system and method
A backplane in a power distribution shelf has power outputs connected to corresponding primary card slots and adjacent card slots. Power distribution cards are seated in the card slots. A...
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7362696 |
Method and apparatus for automatic transfer switch
An automatic transfer switch includes; a housing, at least one switch for switching electrical connection from a first external power source to a second external power source, and a first and at...
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7352087 |
Power system configuration
A power system includes an input power port, a power rail, a battery unit, and a system charger voltage regulator (VR). The system charger VR couples the input power port to the battery unit. The...
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7352578 |
Fuel cell system with inverter and phase change material
The present invention is a back-up power supply of alternating current and direct current, with the alternating current being generated by an inverter from the direct current, which is produced by...
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7352147 |
Power supply to provide operation power for cooling fans
A power supply to provide operation power for cooling fans includes a non-stop power system to provide DC power in normal conditions to a remote switch control circuit to set a computer in an ON or...
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7349446 |
Signal superimposition
A method and apparatus are provided in which control data for a generator system is multiplexed onto a synchronization signal.
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RE40161 |
Cam operated inverter bypass safety switch
An inverter by pass safety switch for rerouting electrical power either through or around AC variable frequency inverter drives during electrical disturbances, thus allowing a motor to continue...
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7336003 |
Transfer switch and power system including the same
A transfer switch includes first terminals adapted to input power from a first power source, second terminals adapted to input power from a second power source, third terminals adapted to output...
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7307360 |
Uninterruptible power supplies
Uninterruptible power supplies (UPSs) are generally discussed herein with particular discussions extended to fuel-cell-based UPSs used in conjunction with DC power supplies for improved operating...
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7302752 |
Method of manufacturing an extended test switch
A method of making and using an extended test switch starting with a previously existing un-extended test switch that is ready for connection to electrical devices to be tested. A housing selected...
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7301248 |
Control method for voltage boosting circuit
A control method for a voltage boosting circuit adapted to be used in an uninterruptible power supply is proposed. The uninterruptible power supply includes a battery module and a voltage boosting...
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