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8164867 |
Method for protection of energy storage source, and in particular motor vehicle battery
A method for protection of an energy storage source (2), in particular a battery of a motor vehicle, against possible overloading caused by prolonged application of an electric voltage to the...
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8130478 |
Power limiting system for multiple electric motors
A power limiting system for multiple electric motors includes an electrical power generating component, such as an alternator, and a plurality of motor controllers connected to an electrical bus....
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8050004 |
Power circuit with feed through protection circuit
A power circuit includes a gate drive sever comparator circuit operable to disconnect a pre-drive transistor circuit from ground in response to an over voltage fault condition. A back-up gate drive...
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7973585 |
Driver circuit
A driver circuit including a pre-driver B1 that operates by receiving operating power from a first power supply VDDI, and a main-driver B2 that receives operating power from a second power supply...
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7944661 |
Protection circuit, flat display device using the same, and method for driving flat display device using the same
A protection circuit which is capable of preventing a faulty operation resulting from an abnormal control signal a method for operating the same, a flat display device using the same, and a method...
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7933101 |
Generator power plant protection system and method
A typical power plant has a plurality of generators; at least one load; at least one bus interconnecting the generators and the at least one load. The plant is operated on an uncorrected droop...
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7791310 |
Vehicle electrical system including battery state of charge detection on the positive terminal of the battery
In a vehicle electrical system powered by a battery for supplying a plurality of loads, an integrated module is provided between the positive terminal of the battery and the loads, and the...
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7777453 |
Car power source apparatus having an over-charge and over-discharge protection circuit with automatic self-test function
A car power source apparatus includes a battery array that has a plurality of battery units connected in series, a battery over-charge and over-discharge detection circuit, selection switches that...
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7750501 |
System and method of over voltage control for a power system
A system and method for preventing over voltages in a power system coupled to an electric machine are disclosed. Briefly described, one embodiment is a method comprising detecting an operating...
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7602269 |
Permanent current switch
There is disclosed a permanent current switch which has a high temperature margin and which is thermally stable and which securely performs a switching operation between a superconducting state and...
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7518838 |
Protection of variable frequency power systems from excessive peak electrical potentials
A method of protecting an electromechanical power transfer system from excessive peak electrical potentials, the power transfer system comprising a prime mover, a dynamoelectric machine coupled to...
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7477493 |
Alternator control device for vehicle
A vehicle alternator control device in which, when a signal detection portion detects a determined input signal, an operating mode of an overvoltage warning portion is switched to a detection...
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7466113 |
Break-before-make sensing for drivers
A driver package includes an integrated circuit (IC) comprising pull up circuitry capable of turning ON an associated switch and pull down circuitry capable of turning OFF the associated switch....
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7462952 |
Electrical power control system
An electrical power control system for use with a recreational vehicle or similar load to selectively control power thereto from either a utility power source or a generator power source comprising...
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7383133 |
Diffuse seismic imaging systems and methods
Systems and methods are disclosed to construct subsurface images from diffuse seismic energy. Various disclosed system embodiments include multiple seismic sensors that each convert received...
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7375933 |
High voltage design structure for high temperature superconducting device
In accordance with the present invention, modular corona shields are employed in a HTS device to reduce the electric field surrounding the HTS device. In a exemplary embodiment a fault current...
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7262520 |
Robust power distribution systems and methods
The present invention provides systems and methods that allow for individual power sources to be disconnected and reconnected without interrupting the power supply from the other power sources and...
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7199987 |
Diode system having zener diodes and a generator
A diode system and a generator, uses Zener diodes. The diode system has AC voltage terminals and DC voltage terminals, in which the Zener diodes are operable in the forward direction to rectify an...
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7095597 |
Distributed static var compensation (DSVC) system for wind and water turbine applications
A power generating system wherein a variable speed turbine is mounted on top of a tower or tethered underwater. The reactive component of turbine generated electrical power is corrected...
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6795287 |
Static excitation system having capability of eliminating shaft vibrations of a generator and overvoltage when underexited
A static excitation system that can eliminate shaft vibrations of a generator and overvoltage when it is underexited is provided. The static excitation system includes an initial excitation...
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6753836 |
Liquid crystal device driver circuit for electrostatic discharge protection
A liquid crystal device (LCD) driver circuit includes first through N-th input pads for respectively receiving first through N-th voltages (N>1). First through N-th electrostatic discharge (ESD)...
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6741436 |
Microprocessor-controlled DC to DC converter with fault protection
A DC/DC converter features a programmable controller in a feedback control loop thereof. The programmable controller enables easy changes to operating parameters by reprogramming the controller's...
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6738238 |
Fire detection system including an automatic polarity sensing power and signal interface
A fire detection system comprising a control panel comprised of one or more controllers for controlling a plurality of devices. A pair of lines are operably connected to the control panel and the...
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6704182 |
Method for protection of a matrix converter against overvoltages, and an active overvoltage device
A method and a device for protecting a matrix converter is disclosed. The matrix converter has nine bi-directional circuit-breakers which are arranged in a 3×3 switch matrix. A highest potential ...
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6654215 |
Photodetector circuit with avalanche photodiode
A photodetector circuit having a power supply and an avalanche photodiode coupled electrically thereto. The power supply includes a first portion, which supplies a substantially constant current,...
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6453421 |
Processor system with power supply selection mechanism
A microprocessor motherboard and system include a microprocessor having external input and external output connections. The microprocessor includes a conductive path formed between one of the...
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6351692 |
Method and apparatus for configuring a genset controller for operation with particular gensets
A genset controller that is configurable for controlling a variety of types of gensets, as well as a method of configuring a genset controller for controlling a genset, are disclosed. The genset...
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6324039 |
Circuit for protection against slow circuit breaker closure during synchronization of a generator and an associated electrical system
The protecting apparatus includes a circuit for automatically and continuously determining the difference voltage between the voltage at the input side of a connecting circuit breaker and the...
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6252753 |
Energy service stabilizer
An electrical power distribution system having geographically separated plural generation stations and geographically separated loads is improved by dynamically offsetting a nominal real power...
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6031701 |
Device and method for overvoltage protection
An overvoltage protective arrangement to protect an electrical installation against overvoltages, which installation has an onboard power supply system fed by an electrical D.C. generator (9) and...
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6031352 |
Active alternator load circuit
A control apparatus controlling the operation of pulse width modulator for an electric clutch or electric motor in portable spray painting equipment having a pressure transducer for sensing the...
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5892342 |
Self-test circuit for a shorted diode protection panel in a diesel electric locomotive
A self-test system for a shorted diode protection circuit in an electric vehicle propulsion system includes a series of relays for selectively coupling a battery in circuit with a field winding of...
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5805395 |
Half-cycle summation V/Hz relay for generator and transformer over-excitation protection
A system for implementing accurate V/Hz value measurement and trip time determination for generator/transformer overexcitation protection independent of the conventional frequency tracking and...
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5805394 |
Overvoltage protection circuit for a generating system utilizing a fault current sensing Circuit in combination with a shunting circuit
An overvoltage protection circuit utilizes the fault current sensing capabilities of a differential protection circuit in combination with a shunting circuit to protect a power generating system...
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5604653 |
Protection component for a three-phase alternator used in automobile vehicles
A three-phase alternator protection component is associated with a rectifying bridge. Three Shockley diodes and an avalanche diode are interconnected through three electrodes, of a first polarity,...
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5594321 |
Battery charging apparatus with fault detection
The battery charging apparatus includes a generator, main voltage regulator, an auxiliary voltage regulator, at least one consuming device and a protective circuit having circuit portions for...
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5568025 |
Abnormally detecting device for relay
There is disclosed a device for detecting an abnormality in relays which is adapted such that if there is a current flow through a motor (M) when first and second transistors (Q1, Q2) are off...
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5532574 |
Brushless exciter protection circuit
A protection circuit for a brushless excitation system is provided which directly monitors the output voltage of the diode bridge rectifier of the system. The protection circuit includes a...
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5528444 |
Automatic overvoltage protection for an alternator in a locomotive propulsion system
A shorted diode protection system for a traction vehicle propulsion system including a synchronous generator having armature and field windings and a bridge rectifier circuit coupling the generator...
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5453901 |
Detection and protection of excitation system from diode failure
Loss of excitation and control and subsequent damage to exciter windings in an excitation system for dynamoelectric machines wherein one or more rotating diodes fail in a shorted mode is prevented...
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5444592 |
Portable power unit
A portable power unit has a protective circuit for cutting off an output current from the power unit when the power unit is in an overload state. An amount of the output current is detected. An...
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5422778 |
Protection system for controller and control wiring induced under voltage faults in an electric power generating system
A protection system minimizing utilization equipment's exposure to, and power interruption resulting from, an under voltage condition in an electric power generating system includes generator...
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5390068 |
Microprocessor based integrated generator set controller apparatus and method
An electrical generator system integrated controller device utilizing PID control and capable of regulating voltage or current, and frequency simultaneously. The device utilizes a micro-controller...
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5262680 |
Switch control apparatus for eliminating intermittent on/off condition on a power supply switch
Disclosed is an apparatus for controlling a solenoid switch connecting a power supply to a load. The apparatus constantly monitors the level of output voltage of the power supply, and accordingly...
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5195007 |
Engine-driven power generating system
An engine-driven power generating system comprising a bridge circuit section in which a low-frequency switching elements driven alternately by low-frequency drive signals, and high-frequency...
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5162964 |
Connection control device for controlling the connection of small generator unit to electric power system
A connection control device for controlling the connection of a small generator unit, which is installed at the consumer's location, to an electric power system. The connection control device...
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5093597 |
Brushless exciter saturable reactor diode snubber
A saturable reactor diode snubber assembly is provided for use witha brushless excitation system. The diode snubber provided includes a thin film member composed of a saturable magnetic material....
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4982316 |
Polyphase full-wave rectifying circuit
A polyphase full-wave rectifying circuit that is connected to a polyphase AC line having a neutral point includes DC output terminals and plural pairs of rectifying elements. Each pair is composed...
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4950973 |
Permanent magnet generator system
A permanent magnet generator system is provided with a permanent magnet generator having a multiple phase armature that includes several circuit branches which are electrically connected to provide...
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4945277 |
Control device for a vehicle A.C. generator
A control device for a vehicle a.c. generator comprises a rectifier connected to an armature coil of the a.c. generator, and having a main rectification output terminal for outputting the rectified...
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