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7623331 |
Method and system for improving voltage regulator accuracy in vehicle alternators
A method for implementing voltage regulation for an electrical generator device includes comparing an output voltage of the electrical generator device to a desired set point voltage thereof, and...
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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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7564662 |
Overload protection system for an electromagnetic lift
A method for protecting against current overload conditions associated with an electromagnetic lift system comprises receiving current data from a current monitoring device associated with an...
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7551416 |
Power supply equipped with an independent overload protection mechanism
A power supply equipped with an independent overload protection mechanism includes a control circuit and a transformation circuit that form multiple sets of combination circuits for transforming AC...
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7545056 |
Saturation control of electric machine
The invention includes an electric alternator/motor having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic...
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7528611 |
Methods and system for detecting winding faults in a generator with parallel windings
A method for detecting stator ground faults in a generator is described. The method includes receiving a neutral voltage signal from a neutral point of a stator, receiving a plurality of terminal...
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7453674 |
Method for protecting an electric generator
A method for protecting an electrical generator which includes providing an electrical generator which is normally synchronously operated with an electrical power grid; providing a synchronizing...
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7400188 |
Voltage providing circuit
A voltage providing circuit includes a protective circuit and a power supply circuit. The protective circuit includes a first transistor. A first control signal is input to a collector of the first...
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7345456 |
Power system stabilizer providing excitation limiter functions
A stabilizer and synchronous electric power generator system using same that provides both power system damping and excitation limiter functionality. The stabilizer includes a processing unit and a...
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7329966 |
Vehicle-mounted electrical generator control system enabling suppression of supply voltage spikes that result from disconnecting electrical loads
A vehicle generator control system detects a time point at which an electrical load is to be disconnected from the generator output, with the detection being achieved prior to that disconnection...
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7304403 |
Power signaling based technique for detecting islanding conditions in electric power distribution systems
A signaling system for detecting power line discontinuity in a power distribution system having a local power generator in a feeder line employs a signal generator that provides a local generator...
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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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7253634 |
Generator protection methods and systems self-tuning to a plurality of characteristics of a machine
A method for detecting stator ground faults in a generator is described. The method includes receiving a neutral voltage signal from a neutral point of a stator, receiving a plurality of terminal...
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7233128 |
Calculation of state of charge offset using a closed integral method
A state of charge control system and method uses a region of voltage linearity and a long-term average voltage to estimate an average battery state of charge for storage batteries and to eliminate...
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7203041 |
Primary side turn-off of self-driven synchronous rectifiers
There is disclosed a power conversion circuit including self synchronous rectifiers and a rapid shutdown section. When power is removed from the power conversion circuit, the rapid shutdown section...
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7167348 |
Miniaturized motor overload protector
A Digital Programmable Motor Overload Protector includes a base module and a detachable, removable user interface module interfaced through a serial communications link. The base module provides...
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7164562 |
Configuration and method for protecting converter means
A protection configuration for converter means which comprise a plurality of controllable switches, the protection configuration comprising a protection circuit coupled to the alternating voltage...
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7133726 |
Thermal cycler for PCR
An instrument for PCR comprising an assembly, a heated cover, and a computer. The assembly can include a sample block, Peltier devices, and a heat sink, clamped together. The sample block...
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7113379 |
DC-DC converter
A switching power supply unit includes an overcurrent protection circuit section and a latch-stop release signal output circuit section. The overcurrent protection circuit section performs an...
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7102250 |
Three-phase generator having increased output
A three-phase generator that has a plurality of stator windings, a rectifier system connected with the stator windings, an exciter winding, a generator controller, and an additional circuit that...
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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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7084609 |
Alternator controlled rectifier
A system and method for controlling the voltage output of an alternator is disclosed. The system includes an alternator having a rotor, which has a field winding, a stator having a plurality of...
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7023196 |
High level arc fault detector
Apparatus and methods for detecting high level arc faults in aircraft power systems are disclosed. One embodiment of the invention with reduced susceptibility to nuisance trips includes three low...
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7006338 |
System and method for individual phase motor over voltage protection
A motor controller comprises a plurality of solid state switches each for connection between an AC line and a motor winding terminal for controlling application of AC power to the motor. A...
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6954345 |
Generator for producing high voltages
A generator for producing high voltages and having at least one generator winding ( 12 ) is connected via a generator circuit ( 10 ) to a network ( 19 ), which generator circuit has means ( 15, . ....
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6917179 |
Load driver and control method for safely driving DC load and computer-readable recording medium with program recorded thereon for allowing computer to execute the control
In regenerative braking mode, an inverter converts, according to PWMC signal from a control unit, an AC voltage generated by a motor into a DC voltage to supply the converted DC voltage to an...
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6891706 |
Protected exciter for an electrical power generator and associated methods
An exciter for an electrical power generator includes a shaft, an armature connected to the shaft, a field surrounding the armature to cause the armature to generate an alternating current, and a...
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6870332 |
Multi-functional motor control device
A multi-functional motor control device is disclosed. A control circuit set are connected between three input currents of different phases and a motor. The control circuit set includes a main...
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6856496 |
Solar tile assembly
A solar tile assembly ( 1 A) comprises a removable rectangular outer panel ( 1 ) that comprises ten photovoltaic cells ( 3 ) disposed on the outermost surface thereof, and a substantially...
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6813123 |
Method for protecting a DC generator against overvoltage
A method is for protecting a DC generator against overvoltage in the event of a loss of load. A voltage limit value is defined and, when starting the current generator, one or a few small current...
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6798627 |
Engine generator set systems and methods providing load power fault protection
An engine-generator set includes a load power fault protector circuit that detects when the power delivered to the load reaches a predetermined maximum power value, and substantially prevents the...
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6775113 |
Safety device for power circuit and fuse box
The safety device for a power circuit includes a first power circuit ( 2 A) including a first load ( 4 ) and a first fuse element ( 5 A) for receiving a first voltage power from a power supply ( 9...
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6774614 |
Method and apparatus for detecting current
An apparatus for detecting currents in a three-phase power transmission system includes a first detection circuit electrically coupled to a first phase of the three-phase transmission system, a...
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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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6696914 |
Electrical fuse for rotary current generator with rectifier
The invention relates to an electrical fuse for rotary current generators, having a rectifier assembly ( 14 ) for supplying a DC network, in particular in motor vehicles. To achieve simple,...
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6693778 |
Diode fault detection and ground fault detection systems
The new Ground Fault Detection and Diode Fault Detection (GFD/DFD) Systems have rotating and stationary component assemblies. The rotating assembly has four interface modules, which are normally...
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6606227 |
High voltage battery cutout circuit for a motor vehicle electrical system
An improved over-voltage protection circuit for a motor vehicle electrical system includes an over-voltage responsive circuit for momentarily disconnecting the vehicle storage battery and...
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6594125 |
Vehicle electrical system arc detection apparatus and method
Disclosed is a vehicle which includes an electrical system monitoring system which results in detecting arcing in the electrical distribution system of the vehicle and the ability to provide...
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6570269 |
Method and apparatus for supplying power to a load circuit from alternate electric power sources
An apparatus and method for supplying power to a load circuit from main and alternate electric power sources involves actuating a signal-controlled selector inside a housing, at least a portion of...
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6534990 |
Voltage regulator wake up control using frequency detection
A generator wake-up system that transitions the voltage regulator from a low power, sleep mode to full voltage regulation mode when the wake-up system detects and confirms a valid frequency of...
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6381109 |
Method of controlling safety tripping means in a high voltage generator, and high voltage generator using the method
A safety tripping system is controlled to prevent electrical arcing during use of high voltage apparatus, in particular an electrostatic coating product applicator. The safety tripping system is...
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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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6181028 |
Transfer mechanism for transferring power between a utility source and a stand-by generator
A transfer mechanism is provided for transferring the supply of power between a generator and utility source. The transfer mechanism includes a monitoring system for monitoring the power supplied...
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6144160 |
Lamp with a temperature-controlled automatically protecting circuit
A lamp with a temperature-controlled automatically protecting circuit which includes a temperature induction circuit and a sampling circuit with its input end to connect with an output end of the...
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6118257 |
Switchgear for a power station generator and a transformer with a three-position disconnector
The switchgear comprises a circuit breaker having an open position for isolating a generator from the network, and a closed position for connecting the generator to the network, together with a...
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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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6023402 |
Software controlled fan with hardware fail-safe restart
A control circuit for the regulation of fan speed control in a computer power supply with software controlled shutdown and automatic restart for over-temperature protection. The control circuit...
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6008508 |
ESD Input protection using a floating gate neuron MOSFET as a tunable trigger element
Disclosed is a floating gate neuron MOS transistor that may be incorporated into devices such as low voltage silicon control rectifiers for protection of internal circuits against electrostatic...
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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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5764462 |
Field ground fault detector and field ground fault relay for detecting ground corresponding to DC component extracted ground fault current
According to a field ground fault detector, a predetermined resistor is connected in series to a predetermined DC voltage. A DC voltage is applied between an N electrode side field circuit of a...
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