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7615965 |
Power management system
A method according to one embodiment may include selecting at least one power supply, among a plurality of different power supplies, and coupling at least one available power supply to a load. The...
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7615891 |
Systems for and methods of controlling operation of a UPS
A UPS includes an AC output, power factor control circuitry; and a DC bus coupled to the power factor control circuitry where the power factor control circuitry is configured to determine a...
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7615890 |
Methods and apparatus for providing uninterruptible power
Power supply systems and methods are provided. In one aspect, a power supply system includes a frame, a power input to receive input power from a power source, a power output to provide output...
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7615889 |
Modular cell site
The present invention is a modular power system using a fuel cell as a back-up power supply. The system includes lithium-metal-polymer (LMP) batteries to bridge and also for backup power if...
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7612468 |
Uninterruptible power supply device with circuit for degradation judgment of storage battery
There is herein provided an uninterruptible power supply device with a degradation judgment circuit 4 of a storage battery 2 which can perform an exact judgment, continuing the power supply to...
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7609031 |
Method for balancing lithium secondary cells and modules
A battery pack control module for balancing a plurality of lithium secondary cells or groups of lithium secondary cells connected in series and method of use.
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7608944 |
Battery connect/disconnect for an uninterruptible power supply
An uninterruptible power supply (UPS) is provided that can alleviate difficulties in shipping electronic devices containing batteries, such as UPS devices by providing a battery connect/disconnect...
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7602082 |
Backup time endorsed power supply apparatus
In order for a backup battery to prolong a backup time period for a mobile instrument, a control signal Sc 1 becomes either low or high in accordance with a determination that a power supply...
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7592717 |
Power mains data transfer system
A power mains data transfer system according to one embodiment of the present invention comprises a data transceiver, a first data path to the power mains over which a data path is maintained, and...
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7589437 |
Control unit in a vehicle
A control unit in a vehicle is provided in which power is supplied via a converter that provides an electrical isolation. For the data exchange with external components and other components in the...
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7589436 |
Data processing unit and DC backup power supply
A backup power supply is so constructed that it is provided with multiple DC backup power supplies 111 to 11 N, each containing nickel-metal hydride battery, stored upright on the bottom of the...
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7582987 |
Double power sources switching circuit
A double power sources switching circuit comprises a detection unit utilizing a detection chip to detect a voltage state of a first power input terminal to provide a stable and accurate voltage...
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7577005 |
Method for recognizing the load of an island inverter and island inverter
The invention relates to a method for recognizing the operational state of a load ( 10 ) connected to the output ( 6, 7 ) of an island inverter ( 1 ). A load recognition signal (S L ) is applied at...
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7573156 |
Apparatus for and method of connecting a power source to a device
According to one aspect of the invention, an uninterruptible power supply includes UPS circuitry, a power source adapted to couple to the UPS circuitry, a first contact, a second contact, and a...
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7573154 |
Battery operated portable electronic device having dual batteries
A battery-operated portable electronic device has a primary battery to provide energy to low current circuitry of the portable device, and a supplemental battery to provide intermittent bursts of...
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7567060 |
System and method for advanced power management
A power management system is provided that includes a power supply means comprising a plurality of power supply strings, a testing means operably connected to said plurality of power supply strings...
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7564148 |
UPS having a dual-use boost converter
An uninterruptible power supply (UPS) system includes a rectifier having inputs connectable to an input AC power line to receive AC power therefrom. The output of the rectifier is connected to the...
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7561411 |
Uninterruptible power distribution systems and methods using distributed power distribution units
A system includes a plurality of equipment racks and a plurality of PDUs mounted in respective ones of the plurality of equipment racks and configured to distribute power via plural branch circuit...
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7560907 |
Charging system for field devices
A charging circuit for field devices is disclosed. The circuit has at least three modes and automatically shifts between the modes depending on voltage of the generator. In a first mode, the...
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7560832 |
Power supply and related systems and methods
A power supply includes a power source having first and second terminals. A circuit is coupled to the source and is operable to maintain a first quantity between the terminals within a...
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7557531 |
Power system utilizing flow batteries
The present invention is an energy generating system which uses an advanced aqueous-electrolyte energy storage system in conjunction with a commercial available primary source of power and a backup...
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7554276 |
Protection circuit for permanent magnet synchronous motor in field weakening operation
A safety circuit for providing protection against failures that impact safety of an inverter circuit driving a Permanent Magnet Synchronous Motor (PMSM) including high and low side switches...
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7550873 |
Uninterruptible power supply for home/office networking and communication system
An uninterruptible power supply for home/office networking and communication system (UPS) comprising: (i) an AC-DC converter, (ii) a battery charger, (iii) a rechargeable battery array, (iv) a...
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7547990 |
Backup power system for electrical appliances
A backup power system for household or structural appliances that normally receives power from a primary power source, and is not an uninterruptible power system. Included are batteries, a battery...
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7541776 |
Method and system for operating a portable electronic device in a power-limited manner
Improved techniques to manage operation of a portable electronic device having a substantially depleted battery when power is available from an external, power-limited source are disclosed. In one...
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7541695 |
Uninterruptible power supply with low power loss
Disclosed is an uninterruptible power supply including a controller; a first switch circuit; a second switch circuit; a transformer having a first winding connected to a load and the first switch...
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7541694 |
Time limit circuit for a hold-up battery
A circuit ( 100 ) is provided that is connectable between input lines ( 150, 152, 154 ) and output lines ( 160, 162 ). The circuit is comprised of a primary battery ( 103 ) and a hold-up battery (...
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7538530 |
Buck converter
The invention relates to a buck converter including a first high-side switch circuit having an input terminal electrically connected to a first power input terminal, a control terminal electrically...
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7538451 |
Power supply system and electronic device
An output from a generator section is controlled by a current converter section to be a constant current. Charging and discharging of a power storage section is controlled by a charge/discharge...
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7535119 |
Power control apparatus of a complex terminal
A power control apparatus of a complex terminal is disclosed that includes a DC/DC converter for outputting an auxiliary power supplied from an auxiliary battery after adjusting a level of voltage...
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7531916 |
Protection circuits for hybrid power systems
A power management and protection system is provided for a hybrid fuel cell system. The hybridization includes a fuel cell stack and an energy storage device (ESD) having either batteries,...
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7528734 |
System and method for automatically detecting power supply voltage
A system for automatically detecting power supply voltage includes a voltage divider connected to a power supply, an A/D converter connected to the voltage divider, a detection module connected to...
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7521823 |
Uninterruptible power supply
An uninterruptible power supply (UPS) system includes an AC power input configured to receive AC power from a single-phase AC power source or a multi-phase AC power source, a DC power source, an...
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7521822 |
Protection techniques for a back-up electric power system
One embodiment of the present application is directed to a protection technique for a back-up electric power generation system. This system includes an electric power generator, generator control...
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7520072 |
Exit signs with and without emergency lighting
Emergency signs and combination emergency signs and emergency lights wherein the combination signs are compact for shipment and are energy efficient using first interior light emitting diodes,...
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7518342 |
Apparatus and method for effecting power distribution to a host system from a voltage source or a battery
An apparatus for effecting power distribution to a host system at a supply locus from one of a voltage source or a battery includes: (a) a current transfer unit having a first and a second...
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7518265 |
On-demand uninterruptible power supply
An uninterruptible power supply (“UPS”) is provided with a backup power supply that has an adjustable reserve power level that is based on a user's input. The UPS provides reserve power that...
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7514817 |
Converting device with power factor correcting and dc/dc converting functions
A converting device with PFC and dc/dc converting functions is provided. The converting device includes a power source providing a dc voltage, an inverter having an input terminal electrically...
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7511389 |
Emergency electric power supply unit
An emergency electric power supply unit ( 9 ) for backing up the main electric power supply system ( 1, 10 ) at the time of the malfunction of the main electric power supply system ( 1, 10 ) which...
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7502233 |
DC power supply using either AC or DC input for both
There is provided a power supply for AC/DC and DC/DC conversion which receives the DC power supplied from airplanes, vehicles and vessels as well as normal AC power, and converts the power to DC...
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7495415 |
DC backup power supply system
A DC backup power supply system having a battery a charge-discharge circuit for charging and discharging a power between the battery and a DC line and a control circuit for controlling the...
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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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7476988 |
Power stealing control devices
A power stealing system having a switch and a circuit that takes power from equipment to operate control electronics. The system may be such that power stealing occurs while the equipment is not...
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7471061 |
Method and apparatus for extending battery life in regulated voltage applications
A technique is disclosed for more fully utilizing the full voltage range of a battery driven battery output voltage when the battery output voltage is provided through voltage regulation circuitry....
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7463500 |
Monopolar DC to bipolar DC to AC converter
An electrical DC-to-AC power conversion apparatus is disclosed that is primarily intended for use with solar photovoltaic sources in electric utility grid-interactive applications. The invention...
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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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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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7449798 |
Co-generated power supply system
In a co-generated power supply system for performing dispersed power supply to a load, a wind turbine generator, a solar cell and a fuel cell whose rated voltages are made equal to a rated voltage...
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