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7622901 |
System power supply apparatus and operational control method
A system power supply apparatus includes a first constant voltage circuit that generates and increases a voltage up to a first constant level when receiving a first control signal. A second...
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7622886 |
Method for determination of the risk to disturbance-free operation of a frequency converter
The invention relates to a method for determining the chance of a disturbance-free operation of a frequency converter ( 2 ) connected to a feeding network ( 18 ). According to the invention, during...
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7592718 |
Boosted switch drive with charge transfer
A switch drive circuit utilizes charge transfer within and/or between boost circuit and/or snubber circuits for boosted switch drives. A boost circuit may include a divider to limit a boosted...
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7586214 |
High voltage energy storage connection monitoring system and method
A connection monitoring system and method for a vehicle high voltage energy storage system is disclosed. The method performs a check, at initial connection of the high voltage energy storage...
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7557468 |
Panel and breaker for distributing UPS power
A UPS power distribution panel which includes means for detecting and differentiating between a symmetrical current waveform and a non-symmetrical current waveform and means for tripping and...
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7557467 |
Portable photographing apparatus and power switching control method
A constant voltage regulator and registers R 1 and R 2 generate a reference voltage with at least one of voltages supplied from a battery and an AC adaptor. The reference voltage is supplied to a...
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7557461 |
Power supply device and power supply method
The power supply device of the present invention supplies power highly reliably by suppressing an increase in costs even when a multiplicity of load groups are present. When operating normally,...
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7547994 |
Apparatus and method for managing power of mobile terminal
An apparatus for managing power of a mobile terminal includes: a first voltage regulating unit that changes the level of power from an external power source to a first level; a second voltage...
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7547991 |
Redundancy power for communication devices
A system and method to provide redundant power to a failing line in a communication device within a communication network supporting the transmission and reception of data. Through the use of a...
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7541698 |
Quiet fan speed control
A novel circuit for driving a fan includes an output terminal for supplying the fan with drive power, a pulse width modulation driver, and a limiter. A first power terminal of the fan is held at a...
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7535130 |
Method and apparatus for mode selection for high voltage integrated circuits
A method is disclosed to add functionality to a terminal of a high voltage integrated circuit without the penalty of additional high voltage circuitry. The benefit is that alternative modes of...
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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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7521825 |
Interface switch for distributed energy resources
A method and apparatus for an interface switch having an external terminal electrically connected to an AC voltage Ē at a frequency ω 0 (for example a utility supply), and an internal terminal...
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7521824 |
Contactor control apparatus and contactor control method for use in electric vehicle
A contactor control apparatus is provided for controlling contactors connected to a battery assembly. A contactor control apparatus includes a controller for turning on and off a first contactor...
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7508095 |
Apparatus to generate high voltage by digital control and method thereof
An apparatus to generate a high voltage includes a switching part to control a voltage induced in a secondary coil of a power transforming part, by interrupting a current in a primary coil of the...
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7459805 |
Image forming apparatus
An image forming apparatus for forming an image with an electrophotographic process, that includes: a power source; a first drive unit having a capacitative load and driving each part of the...
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7421323 |
Automated vehicle battery protection with programmable load shedding and engine speed control
Automated motor vehicle battery voltage protection is provided by setting voltage trip points for increasing engine speed and for shedding selected electrical loads. The system is effected by...
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7417339 |
Fast transition power supply
A power supply includes at least one current source for providing current and a reference voltage generator for providing a first reference voltage and a second reference voltage. A control circuit...
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7417338 |
Disconnecting device for communications connections
A switching arrangement is connected between a PC and a communications line. The switching arrangement is controlled by a power supply voltage in the PC that can be accessed externally. When the PC...
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7408274 |
Control and operating condition monitoring of dual series switch contactors for electric motor or other electrical load
A circuit for controlling at least two power switches that are series connected between a source of electrical power and an electrical load, for energizing the load in response to a signal at a...
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7394172 |
Systems and methods for switching to a back-up power supply
Systems and methods for switching to a back-up power supply are provided. One such system includes a threshold detector circuit; a first switching circuit for enabling access to a first power...
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7388305 |
AC/DC converter having single detectable input
An AC/DC input power converter including only a single input cable such that a user will never have to switch cabling, regardless if the cable is connected to an AC voltage source or a DC voltage...
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7378761 |
Control circuit and a method for electrically connecting a load to a power source
A control circuit ( 1 ) includes two input terminals ( 2, 3 ) for respectively electrically connecting with the active and neutral conductors ( 4, 5 ) of a mains power source ( 6 ). Two output...
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7348689 |
Switching circuit and a method of operation thereof
This invention relates to the operation of a switching circuit, such as a bridge circuit. The invention provides a method of generating pulsed first and second switching signals for switching first...
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7345383 |
Abnormality detection apparatus for a power feed circuit
A single state detector circuit can quickly detect short-circuit and open-circuit abnormalities of a load controlled by a power transistor. A DC power supply, the load and the power transistor are...
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7329969 |
Electronic device including interface terminal and power supply cable connected thereto
It is difficult to increase consumption current of a bus-powered USB device. In order to solve this problem, a conversion cable for a DC connector and a USB connector is adopted in a USB device...
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7301736 |
Method and device for shutting down a drive with a matrix converter during a power outage
A method and a device for shutting down a drive during a power outage are disclosed. The method and device include a matrix converter, several commutation capacitors on the power line side, a...
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7291986 |
Step sinusoidal voltage controlling method for hid, flourescent and incandescent light dimming applications
A step voltage controlling device and method for High Intensity Discharge (HID) light dimming applications includes an autotransformer, voltage sensing block, current sensing block, pulse forming...
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7271507 |
Process and system for controlling an electronic power component and data recording support comprising instructions for executing the process
The process for controlling an electronic power component for piloting an opening and/or closure of this component. The piloting process includes a plurality of steps for controlling the...
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7242237 |
Supply switch circuit for implementing a switchable on-chip high voltage supply
A supply switch circuit is provided for implementing a switchable on-chip high voltage supply. A stack of transistors is coupled between an on-chip high voltage supply and a circuit node. A control...
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7218503 |
Method of determining the correct average bias compensation voltage during a plasma process
A method for removing a substrate that is attached to a bipolar electrostatic chuck (ESC) by application of a bipolar ESC voltage is provided which includes discontinuing the bipolar ESC voltage...
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7215043 |
Power supply voltage switch circuit
A power supply voltage switch circuit for selecting a power supply voltage of an integrated circuit according to a first control signal. The power supply voltage switch circuit contains a high...
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7197650 |
Charging and monitoring apparatus and method of charging a battery and monitoring the power level through power supply line
A battery is charged utilizing electric power provided by a power supply line included in a cable that is in accordance with IEEE 1394. A charging apparatus and a personal computer are connected...
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7193337 |
System and method utilizing a solid state power controller (SSPC) for controlling an electrical load of a variable frequency three-phase power source
A solid state power controller (SSPC) ( 100 ) includes a power switching controller ( 30 ) and power switching devices (PSDs) ( 20 A, 20 B, 20 C) for controlling each phase of a multiple-phase...
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7183672 |
MOSFET based, high voltage, electronic relays for AC power switching and inductive loads
A MOSFET based, high voltage, high current AC electronic relay includes a MOSFET switching circuit selectively switching between switch conducting and switch isolation. The relay also includes a...
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7183671 |
Semiconductor device and method for producing the same
In a power supply disconnection cell, a power supply connection switch is added in parallel to a protection transistor having a fixed gate. The power supply connection switch electrically connects...
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7157808 |
Power supply for a cochlear implant
A power supply control system for use with a tissue stimulating prosthesis, such as a cochlear implant. The power supply control system comprises a first battery ( 31 ), a second battery ( 32 ), at...
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7102253 |
MOSFET based, high voltage, electronic relays for AC power switching and inductive loads
A MOSFET based, high voltage, high current AC electronic relay operating with normally closed contacts is disclosed. The relay includes at least one MOSFET switching circuit selectively switching...
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7064460 |
Method for balancing a three-point DC intermediate circuit, and an apparatus for carrying out the method
A method and apparatus for balancing a three point DC voltage intermediate circuit involves a converter circuit which influences an electrical power flow in a three point DC voltage intermediate...
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7019417 |
Power-on reset circuit with current detection
There is provided a power-on reset circuit for generating a power-on reset signal regardless of a power-up slope using not an RC delay method but a current detection method. The power-on reset...
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7012460 |
IC device having a transistor switch for a power supply
An IC device has a MOSFET serving as a power switch, a condenser connected between a first input terminal of the IC and the gate of the MOSFET, and a ferroelectric condenser connected between a...
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7009314 |
One-way switch
A one-way switch comprises a metal-oxide semiconductor field-effect transistor (MOSFET) and a driver. Source and drain of the transistor function as P-terminal and N-terminal of the one-way switch....
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6989613 |
Line voltage variation compensation apparatus
Circuit apparatus for interconnection between an electric power source of expected variability and an recreation vehicle requiring a known fixed range of voltage change. A voltage sensor ( 18 ) for...
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6909204 |
System for sequencing a first node voltage and a second node voltage
A sequencing system for sequencing a first node voltage at a first node and a second node voltage at a second node which is less than the first node voltage is disclosed. The sequencing system...
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6901326 |
Circuit layout and procedure to control at least one electrical component of a motor vehicle
Circuit layout to control at least one electrical component of a motor vehicle via a control signal, wherein the circuit layout comprises a digital control unit that provides an output signal...
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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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6870282 |
Method for the transmission of signals in a bus system, superposed on a direct supply voltage
Previously in a bus system, voltage signals were transmitted from the central unit to the modules, which could reply thereto by variation of the current input. A disadvantage thereby is the...
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6864600 |
Apparatus and method for providing multiple power supply voltages to an integrated circuit
There is disclosed an apparatus and method for providing multiple power supply voltages to an integrated circuit. In an integrated circuit of the type comprising at least two power supply domains...
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6862163 |
Method and device for bridging brief power outages in a matrix converter
A method and a device for bridging temporary power outages in a matrix converter are disclosed. In the event of a detected power failure, the matrix converter is disconnected from the power line...
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6833535 |
Method and control structure for a sensor heater
A control structure and method for controlling a sensor heater including a power supply connected to a switching device for pulse width modulating a voltage from the power supply. The switching...
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