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8174149 |
Auto-switching duplex module
A system and method (“utility”) for providing power to an electrically powered device from alternate, redundant power sources via a single power cord. The utility is operable to provide red...
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8159086 |
Methods and systems for no-break power transfer converter
A method is provided for using a temporary power source to transfer a power bus from a first power source to a second power source. The first power source operates at a first electrical frequency,...
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8138632 |
Control method for redundant use in the event of a fault in a polyphase converter with distributed energy stores
The invention relates to a method for controlling a power converter having at least two phase modules, which each have an upper and a lower valve branch, each having at least three series-connected...
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8129862 |
Scalable highest available voltage selector circuit
A scalable highest available voltage selector circuit determines the highest of n input voltages and connects the highest voltage to an output. The circuit has at least n circuit branches, each of...
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8120206 |
Method of detecting a sustained parallel source condition
A method of detecting a parallel source condition includes calculating a reactive power, comparing the reactive power to a predetermined threshold, and determining a parallel source condition in...
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8115337 |
Soft-start circuit
An apparatus is provided. The apparatus comprises an input circuit, a startup circuit, and a current limiter. The input circuit is coupled to a first source and is adapted to provide a first...
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8093754 |
High voltage array converter
Methods for compensating for reduced power output in stages of electrical power may be implemented within a direct current to pulse amplitude modulated (“PAM”) current converter, denominated a “PA...
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8084892 |
Power supply device and method
An object is to provide a duplex power supply for auxiliary machines. A power supply device includes a switching section that is connected to a direct-current link between a generator-side inverter...
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8084888 |
Method for the production of high amplitude RF voltages with control of the phase angle between outputs
A method of producing high frequency high amplitude AC voltages with control of the phase angle between outputs from a plurality of generators having individual DC current controlled variable...
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8084886 |
Uninterruptible power supply apparatus
An uninterruptible power supply device connects a battery for power-outage backup to the output side of an AC/DC converter. An input monitoring circuit monitors alternating current input of the...
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8080904 |
Power supply and night vision device using the power supply
Disclosed is a power supply (40) and a night vision device using the power supply (40). The power supply (40) comprises a battery (41), a power switch (42), a booster (43) for boosting a battery...
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8080902 |
Electrical generation protection system
Distributed generation systems incorporate a distribution network and typically a number of distributed generators. It is possible that power islands may be created in substations incorporating a...
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8076797 |
Energy transfer circuit and method
An energy transfer circuit for connecting a load to multiple energy sources that can have different voltages. The energy transfer circuit connects the load and at least two energy sources, and has...
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8072094 |
Active output compensation circuit
An active output compensation circuit is adopted for use on a power supply which receives input power and regulates to become a plurality of different output power. The power supply has a...
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8063514 |
Power supply selection/detection circuit
A power supply selection/detection circuit to select one main power supply from a plurality of external power supplies includes a resistance element with one end connected to an external power...
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8049368 |
Load driving circuit and load driving method
A load driving circuit that generates a desired voltage waveform to drive a load includes a target voltage waveform output section that outputs a target voltage waveform to be applied to the load....
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8013473 |
Detector based combination regulator
Methods and apparatus provide multiple input voltage regulation in which one regulator is selected for operation based on input power conditions. In one example, a dual input voltage regulator...
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8004109 |
Vehicle power supply apparatus, and vehicle
A vehicle power supply apparatus includes a battery that is the main power storage device, a power feed line through which power is supplied to an inverter that drives a motor generator, a boost...
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7982331 |
Transfer switch assembly
A transfer switch assembly is disclosed that includes a power switch device with a number engagement landings and a printed circuit board defining an opening bordered by a number of tabs. The tabs...
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7915762 |
Method for controlling a cluster of wind turbines connected to a utility grid
A method for controlling a cluster of wind turbines connected to a utility grid includes the steps of determining the frequency of the utility grid, detecting a frequency deviation in the utility...
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7884500 |
High voltage array converter
A direct current to pulse amplitude modulated (“PAM”) current converter, denominated a “PAMCC”, is connected to an individual source of direct current. The PAMCC receives direct current and provide...
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7872376 |
Multi-input power-switching circuit
The present invention discloses a multi-input power-switching circuit, which comprises: more than one power input terminal, more than one detection/evaluation circuit, and a switching/controlling...
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7868484 |
Worldwide adaptive multi-coil automatic transfer switch
A multi-coil automatic transfer switch (ATS) adapted for automatically switching an appropriately rated component to render the ATS operational over a worldwide voltage range is provided. A low...
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7830044 |
Power switch circuit
A power switch circuit includes a connector connected to a power supply, a detecting circuit, a first switch circuit, and a first conversion circuit. The connector is connected to the detecting...
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7777368 |
Redundant power supply with pulse width modulation soft start feature
Various systems and methods for providing a pulse width modulation soft start feature in a redundant power supply are disclosed. One method involves comparing an input voltage, which is received...
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7750496 |
Power supply unit for use with an aircraft electrical system
A power supply unit that provides uninterrupted power to an aircraft power bus during switchovers of the aircraft bus from one power source to another. The power supply unit includes circuitry to...
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7709977 |
Method and arrangement for controlling a switching connection between the electrical outputs of a fuel cell and an isolated electrical network
The invention relates to a method and apparatus for controlling and for setting the switching states of switches which are connected to the electrical poles or outputs of a fuel cell and which are...
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7679217 |
Apparatus, system, and method for a high efficiency redundant power system
An apparatus, system, and method are disclosed for a high efficiency redundant power system. First and second power supplies are connected in parallel to power a load. Each power supply includes a...
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7679218 |
Load compensated switching regulator
A load compensation circuit for a switching regulator including a comparator circuit and an adjustable voltage source. The switching regulator includes a switch circuit for converting an input...
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7671489 |
Method and apparatus for selectively maintaining circuit power when higher voltages are present
A method and apparatus for detecting the presence of a specified voltage source and automatically switching off a second voltage source regardless of voltage source potential of the two voltage...
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7667351 |
Method for pulse width modulation synchronization in a parallel UPS system
A method for pulse width modulated pulse synchronization in a parallel UPS system uses the locally measured critical bus voltage to detect a zero crossing and adjust the PWM pulse to coincide with...
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7667350 |
Electric power source apparatus using fuel cell and method of controlling the same
A method of controlling an electric power source apparatus, which comprises supplying electric power to an electronic device on which a secondary battery is mounted from a power source apparatus...
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7656219 |
Unity gain voltage buffer with dual supply voltage for managing current consumption in low voltage applications
A circuit and method for producing an output voltage that replicates an input voltage. A circuit comprises an amplifier stage configured to amplify a difference between an input voltage and a...
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7646115 |
Regulator circuit with multiple supply voltages
A regulator circuit may be configured to operate with multiple power supplies. The regulator circuit may be configured to receive an input voltage and provide a regulated output voltage at an...
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7638900 |
Bi-directional DC-DC converter
A bi-directional DC-DC converter includes a first series circuit connected to ends of a first DC power source and including a first winding of a first reactor and a first switch; a second series...
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7638902 |
Dual-power supplying system with circuit loop switching control circuit
An automatically switchable dual-power-circuit-loop circuit system selectively supplies a first power source through a first voltage output circuit loop to an output terminal, and a second power...
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7635967 |
Generator systems and methods using timing reference signal to control generator synchronization
A power generation system includes a generator configured to be connected to a bus. The system also includes a timing reference signal generator circuit configured to detect a timing variation of a...
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7629771 |
Protection device for non-common ground buses
A protection device for non-common ground buses is disclosed. The protection circuit includes a controller, a level shifter, a first group of switches, and a second group of switches. The...
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7622823 |
Uninterruptible power supply with low leakage current
An uninterruptible power supply having a controllable leakage current is disclosed. The leakage current is controlled by adjusting a switching speed (i.e., dV/dt rate) of switches in the output...
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7608947 |
Back-up power supply systems
A back-up power supply system includes, in one embodiment, a threshold detector circuit; a first switching circuit for enabling access to a back-up power source, the first switching circuit...
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7589438 |
Source phase sensitive transfer method and apparatus
A method and apparatus for transferring AC electrical power to a load from a first power source to a second power source provides for a time delay in the transfer to avoid problems associated with...
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7545659 |
Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter
Cycle error correction is performed in an electronic power system to compensate for a difference between an AC grid side frequency and an AC load side frequency. The electronic power system can...
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7528504 |
Automatic power adapter
An electrical device for automatically combining two input power source supply circuits with either aligned or unaligned phases, into a single operational circuit, with an output load capacity...
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7459804 |
Static transfer switch device and method
Devices and methods for improved voltage source transfer switching. First and second voltage sources (primary and alternate) are connectable to a load via corresponding first and second switches,...
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7417337 |
Method and system for facilitating no-break power transfer
An improved method and system for facilitating no-break power transfer between an APU and a main engine includes determining a required APU speed for conducting power transfer based on various APU...
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7408272 |
Method and device for supplying electric energy power to an appliance
The invention concerns a portable device for electric power supply comprising: connection means (8) for connecting an appliance (1) to be powered; and a power supply circuit (6; 16) supplying in...
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7400493 |
Circuit breaking link status detection and reporting circuit
Certain embodiments provide a circuit breaking link status and reporting system. The system includes a power source and a circuit breaking link in communication therewith. An electrical outlet is...
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7382064 |
Supply voltage identifier
A supply identifier takes precise decision on the range of the external supply to manage a proper internal supply to the core of the IC by controlling a regulator or a switch connected to external...
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7362009 |
Chain reaction control circuit for parallel power supply
A chain reaction control circuit for parallel power supply provides greater power without changing the design of the original power supply structure. It includes a control unit to receive a first...
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7282815 |
Method and circuit arrangement for minimizing interference in an electronic circuit
The method and circuit arrangement both minimize stray electromagnetic interference in an electronic circuit, in which symmetric measurement signals are evaluated. Both inputs (InP, InM) of an...
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