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7633185 |
Apparatus for interfacing a three phase power supply to a load
An apparatus monitors and controls application of three phases of alternating voltage to a load by detecting the sequence of the three phases. A switch module is operated, in response to the...
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7623157 |
Polarity correction circuit and system incorporating same
A video system including a circuit for automatically correcting reversed polarity in a polarity sensitive system. The system includes a video camera, a camera controller for controlling the video...
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7592781 |
Charger control circuit with automatic polarity selection
An exemplary charger control circuit includes an input port having a positive terminal and a negative terminal, an electrode control circuit, and an output port having a positive terminal and a...
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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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7560834 |
Generator switch
In a device for disconnecting and/or connecting m phases (u, v, and w) of an alternating voltage providing source ( 1 ) from n phases (n 1 , n 2 , n 3 ) of a load ( 3 ), each of the m phases (u, v,...
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7531918 |
Hot insertion and extraction of power supply module
Disclosed is a power supply module for use in an electronic system having redundant power supply modules connected to a power bus. The power supply module includes an output filter. The output...
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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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7482712 |
DC power supply with input voltage polarity indication
A multi-mode electromagnetic radiation emitting device comprising at least one source of electromagnetic radiation which emits radiation according to predefined or programmable user selectable...
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7463468 |
Reverse circulation protection circuit
A circuit for protection against reverse circulation of current through the body diode of an FET power switching device switching a load, the power switching device having gate, source and drain...
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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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7427815 |
Method, memory media and apparatus for detection of grid disconnect
A phase shift procedure for detecting a disconnect of a power grid from a feeder that is connected to a load and a distributed generator. The phase shift procedure compares a current phase shift of...
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7411768 |
Low-loss rectifier with shoot-through current protection
A transistor active bridge circuit ( 400 ) rectifies domestic AC mains (for example, 120V, 60 Hz) and/or foreign AC mains (for example, 230V, 50 Hz) with low power loss. The circuit includes first...
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7294983 |
Motor drive circuit
Two systems consisting of an on-off control section corresponding to the saturation drive system and a constant voltage control section corresponding to the constant voltage drive system are...
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7288856 |
Reverse battery protection circuit for power switch
A circuit for protecting a power switch in the event of a reverse battery connection, wherein the power switch comprises a MOSFET having a body diode and the MOSFET is connected in series with a...
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7285876 |
Regenerative gate drive circuit for power MOSFET
A regenerative drive circuit for driving the gate of a power MOSFET of a switched mode power converter includes a pair of MOSFETS connected in series with a pair of coupled inductors L 1 , L 2 and...
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7285875 |
Resonant converter with outputs of different polarities
A secondary side series resonant circuit formed by at least one secondary winding and a secondary side series resonant capacitor is provided together with a secondary side series resonant circuit...
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7282816 |
Manual switch remote controller
A manual switch remote controller is adapted for use with a power switch machine to electrically and selectively move switch points of a track switch between a normal position and a reverse...
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7245230 |
Dual magnetic field sensor unit
The present inventions relate to a method and apparatus for adding Automatic Meter Reading (AMR) capabilities to utility meters that generate a magnetic field comprising magnetic flux that varies...
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RE39446 |
Power filter circuit responsive to supply system fault conditions
A power filter circuit for protecting electronic equipment from electromagnetic interference introduced by a supply system circuit includes a fault/condition sensing circuit capable of detecting...
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7145268 |
Fault-tolerant three-level inverter
A method for driving a neutral point clamped three-level inverter is provided. In one exemplary embodiment, DC current is received at a neutral point-clamped three-level inverter. The inverter has...
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7145267 |
System and method for brownout protection of a FET based battery switch
A switching circuit operative to switch between a first and second power source to an output is disclosed. The circuit comprises a MOSFET switch electrically connected to the first and second power...
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7126801 |
Polarity protection implemented with a MOSFET
A polarity protection circuit contains a metal oxide semiconductor field effect transistor (FET) that pets its control voltage via an electrical connection from supply voltage lines and a...
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7095138 |
Controller for plural supplies driving single load
A controller is disclosed for determining that the currents from the two AC power sources are correctly phased. Required circuitry can be disposed within a housing from which extend power cables...
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7065662 |
Information handling system featuring a power-based current limiting circuit
A method of implementing a power-based current limiting circuit in an information handling system includes providing a power supply having an output voltage operating range that can vary between a...
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7038329 |
Quality power from induction generator feeding variable speed motors
A prime mover ( 28 ) in a heat recovery system drives an induction generator ( 8 ) which feeds power to a utility grid ( 9 ) through a breaker ( 10 ) but also powers a load including auxiliary...
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6998735 |
Controlled rectifier bridge, control system, and method for controlling rectifier bridge by disabling gate control signals
A controlled rectifier bridge includes a plurality of segments each having an element responsive to a control signal, and an output having a voltage, a first current and a second current. Sensors...
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6995605 |
Resonance suppression circuit
A resonance suppression circuit is provided to suppress resonance on a power grid of a chip or die. The resonance suppression circuit may include a band-pass filter portion, a comparator portion,...
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6952092 |
Watt power device
An energy savings circuit comprising a means for receiving an ac voltage source; a first voltage storage device in series with the ac voltage source; a second voltage storage device electrically...
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6930409 |
Electromechanical switching device
An electromechanical switching device ensures automatic selected polarity interconnection between terminals of two power sources. A double pole double throw (DPDT) switch has three pairs of...
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6919650 |
Hybrid synchronization phase angle generation method
A hybrid use of a phase-locked-loop controller and a microprocessor-based controller to synchronize the phase angles of a three-phase AC power source, such as a static power converter, with those...
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6909585 |
Protection circuit protecting against voltage irregularities
Protection circuits ( 1 ) to be located between power supplies ( 2 ) and further circuitries ( 20,30 ) for protecting further circuitries ( 20,30 ) against voltage irregularities and comprising...
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6906579 |
Optimal inductor management
In a packaged integrated circuit, the package inductance limits the rate at which off-chip current may be varied in response to a change in on-chip current demand of the integrated circuit. The...
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6853098 |
Communications interface and floating devices including such an interface
A communication device is provided which transmits and responds to differential currents. Thereby allowing communication between devices that may be floating with respect to each other.
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6825577 |
Dual power polarity protector/indicator
A diode-configured power supply interface circuit prevents inadvertent miswiring of power supply leads to wrong polarity voltages of either primary or auxiliary DC supply voltages from triggering...
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6815845 |
Method and apparatus for reversing polarity of a high voltage power source
The present invention is directed to a circuit for reversing the polarity of a high voltage power supply. Circuits according to embodiments of the invention may include four switches, one or more...
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6804097 |
Protective circuit for electronic modules, especially driver modules
The invention relates to a protective circuit for electronic modules, especially driver modules, for protecting against polarity reversal and against rupturing of the neutral conductor. A first...
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6800802 |
Circuit device for solar energy application
A circuit device for solar energy application includes a solar panel as power supply and a rechargeable cell pack for receiving the power transferred from the solar panel. The circuit device uses a...
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6727605 |
Duty cycle phase number control of polyphase interleaved converters
Interleaved converter and method for controlling such inverter are provided. The converter includes a plurality of phasing stages. The converter further includes a calculator configured to...
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6687102 |
Battery-operated power supply unit
The battery-operated power supply unit, which comprises a switching transistor whose current terminals are connected in series with a battery, in the current path of the power supply unit,...
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6661122 |
Polarity independent power supply control methods and systems using the same
A method of controlling a power supply having an output activated in response to a first logic level of a control signal and deactivated in response to a second logic level of the control signal. A...
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6657836 |
Polarity reversal tolerant electrical circuit for ESD protection
An ESD protection circuit is provided which offers full protection for sub micron CMOS technology integrated circuits that does not have a latchup problem as in silicon controller rectifier...
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6650520 |
Power supply reverse bias protection circuit for protecting both analog and digital devices coupled thereto
All integrated circuits (ICs) require a power supply having a potential difference for use in powering internal integrated circuit components to ensure their operation. In some cases it is possible...
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6639413 |
System and method for calibration of data in an electric power monitoring system
The error compensating system and method is used in electric power monitoring systems, e.g. protective relays, and includes a test unit for applying a test signal to the front end of a data...
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6611410 |
Positive supply lead reverse polarity protection circuit
A protection circuit for use in a power electronic circuit has a positive supply input, a negative supply input, and a snubber. The protection circuit includes a snubber bias lead, a positive...
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6538346 |
System for driving a reactive load
A circuit to control the supply of a reactive load, for supplying variable quantities of energy to the load in a predetermined manner is included in a system. The system also includes reactive...
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6529356 |
Power polarity reversal protecting circuit for an integrated circuit
A power polarity reversal protecting circuit for an integrated circuit includes a protecting transistor, PMOS components and NMOS components, wherein the protecting transistor is a protecting PMOS...
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6519126 |
Anti-reverse connection circuit for power supply
An anti-reverse connection circuit for a power supply comprises an input terminal connected to a positive polarity of an external power supply, an input terminal connected to a negative polarity of...
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6472837 |
Multipolar electromagnetic switching module
The present invention relates to a multipolar electromagnetic switching module designed to be connected by line connections (t 1 , t 2 , t 3 ) to a main electromagnetic switching device (AP) and by...
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6466627 |
Pulse signal transmitting circuit and subscriber's line terminal apparatus using the pulse signal transmitting circuit
A pulse signal transmitting circuit generates a pulse signal having an enhanced high-frequency component with a reduced power loss. A pulse signal is transmitted to a load circuit through a...
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6429550 |
Polarity reversal protection circuit for a final electronic power stage
A polarity reversal protective circuit for an electronic power output stage that can be driven via a drive circuit is described. In the case of an incorrect polarization of a supply voltage, power...
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