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7612465 |
Power supply circuit containing multiple DC-DC converters having programmable output current capabilities
A apparatus and method of operating a power converter circuit is provided. The method selectively couples control signals to at least one output driver stage of a plurality of output driver stages...
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7608941 |
Adaptor circuit for power supply
An exemplary adaptor circuit of a power supply includes a power connector, a first electric switch, a second electric switch, and an output terminal. The power connector includes a power good pin...
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7598628 |
Automated bypass method and apparatus
An arrangement that provides power to an electrical device includes an inverter, first and second switches, and a bypass controller. The first switch has open and closed positions, and is operable...
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7582989 |
Safety relay having independently testable contacts
Methods, apparatus, and articles of manufacture related to safety relays having independently testable relay contacts are disclosed. In one disclosed example, a safety relay includes a plurality of...
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7576450 |
Regulated alternating current power supply
An exemplary regulated AC power supply comprising a three phase AC power source; a first switch having two input terminals arranged for receiving a first phase and a second phase of the three phase...
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7566994 |
Small-step, switchable capacitor
According to an example embodiment, an apparatus is provided that produces a small-step switchable capacitor, which can have steps that are smaller in value than the smallest capacitor used in the...
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7564150 |
Control device for an electrical appliance and control method
A control device for an electric hob has a control element placed on a support. Circular ring segmental surfaces are provided as signal generators beneath the support. On the top side and...
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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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7547993 |
Radiofrequency double pole single throw switch
A double pole single throw (DPST) switch circuit including a first circuit portion corresponding to a first input port, a second circuit portion corresponding to a second input port, and an output...
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7547989 |
Control architecture for power supply
The present invention discloses a control structure for a power supply, which comprises: a primary power system, a power switching unit, and at least one switch. The primary power system transforms...
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7535129 |
Method and apparatus for transfer of a critical load from one source to a back up source using magnetically latched relays
An automatic transfer switch includes first and second magnetically latched relays that respectively connect first and second voltage sources to a critical load. The first and second relays are...
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7535128 |
Temperature detector
A temperature detector for outputting a temperature signal comprises: a temperature sensing diode formed on the same chip as a semiconductor switching device and having a specific temperature vs....
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7535127 |
Solid state relay driver
The present invention is a solid state relay having improved high speed turn on and lower heat dissipation of the power transistor. It uses a voltage level converter and AC-DC converter to provide...
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7535123 |
Apparatus and method for selectively coupling system with a first power supply or a second power supply
An apparatus for selectively coupling a system with a first power supply or a second power supply includes: (a) a first switch for effecting a first coupling of the system with the first power...
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7531920 |
Driving circuit
When a driving signal changes from L level to H level, a switching circuit is turned on. Then, a gate current flows from a booster circuit to MOSFET through the switching circuit and a resistor. A...
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7511390 |
Dual FET output stage with controlled output DV/DT for reduced EMI and input supply noise
The slew rate of switching circuits, e.g. for DC to DC converters, is controlled without unduly sacrificing total switching time, by providing a weaker switching transistor in parallel with each...
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7504746 |
Differential load driver circuits
A differential driving circuit is provided that reduces ripple current. The differential driving circuit is operable to supply a linear current in a low current mode and a PWM current in a high...
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7499261 |
Load control device having a split enclosure
A load control device is adapted to be installed in an electrical wallbox having a barrier. The load control device comprises a split enclosure having first and second enclosure portions spaced...
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7492063 |
Method of using a single pole single throw switch to provide three operative states
A method of using a single pole, single throw switch having normally open contacts in a conductive path in a non-intuitive manner in an electric circuit to sequentially provide three operable...
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7471073 |
Method of finding a maximum power of a photovoltaic generator
A method of finding a power maximum of a photovoltaic generator using an MPP regulator of a photovoltaic current converter by means of which a maximum generator power is set at an operating point...
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7456601 |
System and method for starting a wound rotor motor
A system and method for starting and regulating a wound rotor motor especially during the period between inactivity and a speed determined by the voltage ratings of the drive system. In a first...
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7446437 |
Apparatus and method for preventing an electrical backfeed
At least one aspect is directed to a transfer switch including a first input to couple a first multiphase low voltage electrical supply to the transfer switch, and a second input to couple a second...
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7391133 |
Hybrid switch
An electrical switching topology for a hybrid switch provides extremely low losses in both cryogenic and non-cryogenic electronic systems. In this switch having switch modules connected in...
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7378760 |
Barrier movement operator with controlled power outlet
A barrier movement operator having an integrated mains voltage connection with a selective connection of power to an accessory such as a light is disclosed.
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7365453 |
Aqueous solution plate control system and method
A system for controlling the operation of conductive plates immersed in an aqueous solution, such as in water treatment applications. The system allows independent control of the current sourced or...
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7342188 |
Rotary light switch for motor vehicles
A rotary light switch for motor vehicles is presented that ensures a feel that is not susceptible to mechanical influences. The rotary light switch has an actuator that can be rotated around an...
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7323795 |
Apparatus for powering on by pushing random key
An apparatus for powering on a terminal with a keypad by randomly selecting any key of the keypad. The keypad includes a plurality of keys, each of which has at least one set of contacts. The...
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7317263 |
Power tool lockdown device
A lockdown device for a power tool includes a housing containing a battery, a processor, and a relay. The housing mounts to an aperture in a power tool so as to be locked thereto and so as to be...
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7313489 |
System and method utilizing virtual switching for electrical panel metering
A system and method utilizing virtual switching in an electrical panel meter. The virtual switching enables the meter to be upgraded or downgraded through a switching signal, by activating or...
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7312695 |
Apparatus and method for displaying operating characteristics on status indicators
A user interface for a load control device allows a user to control an operating characteristic of a load to a plurality of discrete levels. The user interface comprises an adjustment member for...
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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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7282817 |
Electrical circuit arrangement for controlling an electromotor in a motor vehicle
A motor control arrangement includes a device connected to positive power such that device drives motor upon connecting to negative power. A switch connects to positive power upon actuation. A...
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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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7274117 |
Radio wall switch
A radio wall switch that uses radio signals to control a load through a load circuit is disclosed. The radio wall switch is also configured group or bind electronic devices to operate collectively...
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7253540 |
Method for operating a parallel arrangement of semiconductor power switches
The invention relates to a method for statically balancing the loading of power semiconductor switches (S 1 , S 2 , S 3 ) in a parallel circuit ( 1 ). To achieve this in prior art, switching...
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7247999 |
Dimmer for use with a three-way switch
A smart dimmer for controlling the intensity of a lighting load from a source of AC power is operable to replace one of the three-way switches in a standard three-way lighting system without the...
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7235900 |
Switching apparatus and method for varying a phase line impedance of an electric power transport line section
The switching apparatus and method are provided for varying the impedance of a phase line of a segment of an electrical power line. The phase line includes n conductors electrically insulated from...
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7233510 |
Circuit configuration with error feedback for the actuation of power semiconductor switches and associated method
The invention relates to an integrated circuit configuration proposed for the actuation of power switches disposed in bridge connection and an associated method. The primary side of this circuit...
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7208899 |
Emergency-stop device
An emergency-stop device provided in a robot system, a machine tool or the like, arranged to promptly detect failure of a circuit through which an emergency stop signal is supplied to an CPU,...
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7199490 |
Semiconductor device for preventing noise generation
There is provided a second switch used to turn on/off connection between a first circuit portion with a decoupling capacitance on a first switch side. Then, in accordance with on/off of the first...
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7190125 |
Programmable wallbox dimmer
A programmable wallbox dimmer is disclosed. Upon entering a programming mode, the dimmer presents a main menu from which the user may select one or more features to program. The user may scroll...
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7151234 |
Outlet panel for single pin connectors
A device for providing electrical power that includes one or more single pin outlets and one or more switches, each of the switches coupled to a respective one of the one or more single pin...
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7112899 |
Device for controlling an electric load, and a control device
A device for controlling at least one electrical load and a control device therefor. The electrical load includes a first load connection and a second load connection. The first load connection is...
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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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7019416 |
Power source circuit, electronic device being equipped with same power source circuit and control method of power source circuit
A power source circuit capable of improving an efficiency of using energy of a chemical battery cell by responding suitably to an intermittent change in a load current, by during a load burst...
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7002300 |
Microwave generator and method of radiating microwave energy
Intensive microwave radiation in particular of great band width and energy over a relatively long period of time in the form of long pulse packets with a high pulse repetition frequency and a very...
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7002264 |
Control circuit for turning a device on or off using a conventional wall switch or a device switch
A control circuit for operating a lamp or other electrically operated device using a conventional wall socket outlet that is selectively energized under the control of a conventional wall mounted...
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6933686 |
Programmable AC power switch
An AC controller provides programmable switching of AC power flow, together with producing a source of DC power for the AC controller. The AC controller is connected in series with only one side of...
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6919652 |
Network apparatus
A network apparatus is provided, which allows another network apparatus to recognize the disconnection with reliability, if a power supply to the network apparatus is interrupted. A control unit...
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