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7045914 |
System and method for automatically providing continuous power supply via standby uninterrupted power supplies
A system for automatically providing continuous power supply via standby uninterrupted power supplies (UPSs) includes: a plurality of primary UPSs ( 10 ) for providing power supply to electrically...
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7045964 |
Emergency lighting system with automatic diagnostic test
An emergency lighting system powers all the luminaires of a lighting system during normal use, and switches from utility power to an emergency power source to drive some of the luminaires during a...
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7042108 |
Backup power system
A backup power system is connected in parallel to a load which is powered via a power line connecting that load to a main power source, such as a utility. The backup system includes a...
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7030514 |
Power transfer switch assembly
A modularly attachable transfer switch assembly for operative connection to two alternate power sources and a power load is disclosed. The transfer switch can be quickly and easily installed upon...
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7030517 |
Mobile devices power server
A mobile device (power supplying device) includes a mobile device power server (MD PS) for providing power to another mobile device (power receiving device) having no external power supply...
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7026783 |
Drive system
A drive system includes a central power supply with a line-commutated converter and a DC/DC converter connected downstream of the line-commutated converter, and a plurality of inverters, each...
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7023109 |
Uninterruptible power source apparatus
An uninterruptible power supply unit essentially includes: a DC power supply source 3 , a parallel converter 4 , and a series converter 6 that are individually connected in parallel to both...
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7019416 |
Power source circuit, electronic device being equipped with same power source circuit and control method of power source circuit
A power source circuit capable of improving an efficiency of using energy of a chemical battery cell by responding suitably to an intermittent change in a load current, by during a load burst...
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7015599 |
Backup power management system and method of operating the same
A backup power management system connectable to a primary power source and a secondary power source, and a method of operating the same. The system includes a transfer switch connectable to the...
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7015404 |
Do-it-yourself system for portable generator
An apparatus that connects generator power, from a generator to a hard-wired load, the load being connected in circuit to a load power switch that switches power to the load. The apparatus includes...
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7005759 |
Integrated converter having three-phase power factor correction
An integrated converter is provided. The integrated converter includes an AC/DC converter electrically connected to a three-phase power supply for converting an alternating current into a first...
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6996746 |
Apparatus and method to handle power supply failures for a peripheral device
One embodiment of the invention is directed to a data processing system that includes an electrical detection circuit to determine whether the electrical power is going from “on” to “off,”...
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6987363 |
Emergency ballast for compact fluorescent lamp with battery heater
An emergency ballast for a compact fluorescent lamp including a heater disposed adjacent the battery for maintaining the battery at a safe and effective operating temperature during the time which...
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6982500 |
Power-down scheme for an on-die voltage differentiator design
According to one embodiment, an integrated circuit is disclosed. The integrated circuit includes a plurality of circuit blocks. Each circuit block includes a voltage differentiator that generates a...
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6979965 |
Spring return actuator for a damper
An actuator including an electric motor driven by a drive circuit powered by a power source, and a load coupled to the electric motor. The actuator further includes a spring biasing the load to a...
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6967415 |
Power source apparatus
A power source apparatus comprising: a direct current power source to output a first voltage; a load driven with a second voltage higher than the first voltage; a booster converter to boost an...
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6966005 |
Energy caching for a computer
The following are provided for example: methods comprising determining a value for an energy condition affecting at least one computer in a cluster; updating said value continuously; comparing said...
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6960842 |
Integrated uninterruptible power supply enclosure
The present invention provides an uninterruptible power supply (UPS) having a chassis formed using mating panels of a sturdy, lightweight, substantially rigid material, such as ABS plastic, that...
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6961236 |
Computer chassis
A computer chassis has a post assembly, a motherboard holder, a guardian board and a mounting board. The post assembly has a first post, a second post and a power supply holder. The motherboard...
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6949843 |
Grid-connected power systems having back-up power sources and methods of providing back-up power in grid-connected power systems
A grid-connected power system includes a primary power source, a back-up power source, a DC/AC inverter and a DC/DC converter. Direct current from the primary power source is supplied to the DC/AC...
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6944035 |
Power factor corrected UPS with improved connection of battery to neutral
An uninterrupted power supply (UPS) device with uninterrupted neutral from input to output utilizes the same converter for converting rectified AC power and battery power to positive and negative...
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6940187 |
Robust controller for controlling a UPS in unbalanced operation
A controller ( 236 ) for an uninterruptible power supply (UPS) compensates for harmonic distortion in the output current ( 224,26,228 ). The controller also provides a control vector ( 230 ) also...
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6940334 |
Methods and systems for generating interim voltage supplies
Methods and systems for protecting integrated circuits (“ICs”) from power-on sequencing problems provide an interim voltage during power-on sequences in order to prevent over-voltage conditions...
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6933626 |
Ferroelectric transformer-free uninterruptible power supply (UPS) systems and methods for communications signal distribution systems
Uninterruptible Power Supply (UPS) systems and methods for a communications signal distribution system, such as a cable television (CATV) signal distribution system that distributes a communication...
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6924731 |
Power supply alarm control system
Methods and systems are provided for controlling the enabling and/or disabling of an audio alarm that indicates an occurrence of a predetermined event of a power supply, such as an uninterruptible...
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6912123 |
Power supply device
An object of the present invention is to provide a power supply device that permits high efficiency and miniaturization, that makes the constitution of a power supply device advantageous from a...
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6909621 |
System for and method of controlling standby power
An apparatus for and a method of controlling standby power to minimize energy consumption in a standby mode. The standby power control apparatus includes a control unit, a power supply unit, a...
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6906434 |
Electric utility system with superconducting magnetic energy storage
a voltage recovery device is configured to provide real and reactive power to a utility power network at a sufficient level and for a sufficient duration to recover the voltage on the utility power...
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6906435 |
Uninterruptible power system with two current conversion units
An uninterruptible power system has two current conversion units coupled between a line voltage and a load in parallel, wherein each current conversion unit has a rectifier and an inverter...
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6885112 |
Proton exchange membrane based power system for a telecommunication facility
A power system specifically designed to provide reliable electrical power to a telecommunication facility is disclosed. In one embodiment, the system includes a number of proton exchange membranes...
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6881509 |
Fuel cell system power control method and system
A fuel cell is placed in parallel with a battery via a mechanical switch. The voltage is held nearly constant by the battery and the power flow is controlled by adjusting the fuel cell operating...
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6879060 |
Method and apparatus for transfer control and undervoltage detection in an automatic transfer switch
An automatic transfer switch is disclosed that features a novel arrangement for detecting a failure of the power source as well as a novel arrangement for preventing cross-conduction between the...
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6879061 |
Current adjusting apparatus and current adjusting method
A direction and a magnitude of a current flowing between an external alternating current power source ( 20 ) and a load ( 30 ) are detected by a current transformer ( 11 ). A voltage generated to a...
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6876103 |
Automatic transfer switch systems and controllers
An automatic transfer switch (ATS) controller is disclosed which includes a power supply circuit to regulate and filter input power, a transformer to convert utility and generator power sources...
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6861769 |
Apparatus and method for protection of an electronic circuit
An apparatus and method for the protection of an electronic circuit against anomalies in a supplied power voltage where the apparatus includes: a reserve power source connected to the supplied...
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6853097 |
Uniterruptible power supply and its starting method
The present invention provides an uniterruptible electric power supply capable of inhibiting an excessively high intensity of inrush electric current at the time of start even when the inrush...
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6849811 |
Methods and apparatus for transfer switch
A transfer switch for switching between power sources for a load includes a plurality of symmetrical phase plates, a plurality of stationary contact pads associated with each said phase plate, each...
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6849967 |
Automatic transfer switch for microturbine and method of operation
A multi-mode transfer switch selectively operates in a first operating mode in which the utility source alone is connected to the load bus, a second operating mode in which only the microturbine is...
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6847131 |
Power supply device and electronic equipment
A power supply device is presented which can provide a sufficiently long ending process time to an electronic equipment connected thereto even if an input voltage is disconnected abnormally and...
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6833634 |
Disk enclosure with multiple power domains
A disk enclosure includes a first group of one or more power sources that powers a first group of elements in a first power domain and a second group of power sources that powers a second group of...
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6825577 |
Dual power polarity protector/indicator
A diode-configured power supply interface circuit prevents inadvertent miswiring of power supply leads to wrong polarity voltages of either primary or auxiliary DC supply voltages from triggering...
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6822345 |
Chip/package resonance damping using controlled package series resistance
A method and apparatus for reducing an impedance of a power supply path of an integrated circuit is provided. The power supply path includes a first power supply line and a second power supply line...
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6819226 |
Systems and methods for energy storage in land-based telemetry applications
The invention involves systems and methods of providing energy to land-based telemetry devices wherein the energy storage and power conditioning system is comprised of an input power supply, an...
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6819535 |
Device for protecting loads supplied by an alternator
A device of protection of at least one circuit supplied by a voltage obtained from at least one inductive element, including a switch for short-circuiting the supply provided by the inductive...
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6815624 |
Methods and apparatus for transferring electrical power
A method for manufacturing a transfer switch includes providing a transfer switch including a first shunt contact and a second shunt contact, and operationally coupling a shunt solenoid to the...
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6815843 |
Power supply device
A power supply device with n power supply units comprises main power supplies generating DC voltage supplies V DC1 to V DCn supplied to a load, respectively, unit side control sections each...
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6813897 |
Supplying power to at least one cooling system component
A primary power system and a secondary power system are operable to supply power to at least one cooling system component in a cooling system. The amount of power supplied by the primary power...
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6815844 |
Circuit for supplying power to a network termination unit of a message transmission system
The invention relates to a circuit for supplying power to a network termination unit ( 55 ) of a message transmission system, which is connected to a central station via a subscriber line ( 30 ). A...
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6812587 |
Continuous power supply with back-up generation
A continuous power supply may include a turbogenerator to provide power to supply the load and or an energy storage element and possibly also to the primary energy source. Utilizing an isolated DC...
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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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