Class / Patent application number | Description | Number of patent applications / Date published |
307098000 | COMBINED IMPEDANCE AND SWITCH SYSTEMS | 20 |
20090085407 | METHOD AND DEVICE FOR ASSESSING AND MONITORING VOLTAGE SECURITY IN A POWER SYSTEM - Provided is a method and device for assessing and monitoring voltage security in a power system. More specifically, a method and device for assessing and monitoring the value of reactive power load when changes in reactive power outputs of at least some of the generators in the electrical power system cause all of the generators in the system to reach the combined operating limit of their reactive power output. In response thereto, the method and device are further adapted to initiate suitable control measures such as switching of transformer banks and/or capacitor/reactor banks, as well as shedding loads whenever necessary to mitigate an impending voltage stability problem. | 04-02-2009 |
20100133914 | APPARATUS AND METHOD OF CONTROLLING SWITCH UNITS, AND BATTERY PACK AND BATTERY MANAGEMENT APPARATUS COMPRISING SAID APPARATUS - Disclosed are an apparatus and method of controlling switch units between a battery pack and a load, and a battery pack and a battery management system comprising the same. The apparatus comprises a memory for storing the turn-off number and order of first and second switch units connecting the battery pack with the load according to current ranges; and a control unit for equalizing the turn-off order of the first switch unit and the second switch unit with reference to the turn-off number and order in a current range corresponding to a magnitude level of discharge current of a battery. Accordingly, the present invention reduces the frequency of breakdown or malfunction of the switch units and increases the using period of the switch units. | 06-03-2010 |
20120256493 | SWITCHING DEVICE AND SWITCHING MODULE - A switching device includes: a switching element; an emitter electrode; an emitter terminal for main wiring for connecting the emitter electrode to an external main wiring; a plurality of control emitter terminals interposed in a main current path between the emitter electrode and the emitter terminal for main wiring; and inductances each interposed in the main current path and placed between adjacent ones of the control emitter terminals. | 10-11-2012 |
20130257165 | APPARATUS, SYSTEM, AND METHOD FOR DETECTING A FOREIGN OBJECT IN AN INDUCTIVE WIRELESS POWER TRANSFER SYSTEM VIA COUPLING COEFFICIENT MEASUREMENT - An inductive wireless power device comprises a transmitter configured to generate an electromagnetic field to a coupling region for wireless power transfer to a receiver, and control logic configured to determine a coupling coefficient of the wireless power transfer when the receiver is within the coupling region. The control logic also determines a presence of a foreign object within the coupling region responsive to a comparison of the determined coupling coefficient and an expected coupling coefficient for the wireless power transfer. An inductive wireless power device comprises a receiver configured to couple with an electromagnetic field in a coupling region for inductive wireless power transfer from a transmitter. The receiver is configured to alter a wireless power transfer characteristic of the transmitter for a determination of a presence of a foreign object within the coupling region responsive to a determination of a coupling coefficient of the wireless power transfer. | 10-03-2013 |
20140125137 | SWITCHING APPARATUS, CONTROL SYSTEM AND METHOD FOR VARYING AN IMPEDANCE OF A PHASE - An apparatus and a method are for varying an impedance of a phase line of a segment of a first electrical power line, the phase line including n conductors electrically insulated from each other and short-circuited together at two ends of the segment. The apparatus includes at least one controllable switching device for connection with at least one of the conductors. The apparatus also includes a controller for performing control of the at least one controllable switching device, the controller having at least one optical port for receiving first optical signals on which the control is based, and for sending second optical signals to adjacent switching apparatuses, the second optical signals including status information of the one switching apparatus, upon which control of adjacent switching apparatuses is based. | 05-08-2014 |
20160191019 | Methods and Apparatuses for use in Tuning Reactance in a Circuit Device - Methods and apparatuses for use in tuning reactance are described. Open loop and closed loop control for tuning of reactances are also described. Tunable inductors and/or tunable capacitors may be used in filters, resonant circuits, matching networks, and phase shifters. Ability to control inductance and/or capacitance in a circuit leads to flexibility in operation of the circuit, since the circuit may be tuned to operate under a range of different operating frequencies. | 06-30-2016 |
307099000 | Condition responsive switch | 14 |
20090284081 | Power discharge control system - A power discharge control system for eliminating residual voltage of electronic components in an electronic device, is proposed, which includes a control IC for outputting first electrical signals of a first level and a second level respectively corresponding to power on and power off of the electronic device; a power supply for receiving the first electrical signal, and providing or terminating operation power to the electronic component accordingly, and delaying outputting of a second electrical signal equivalent to the first electrical signal level; a logic judgment module connected to the control IC and the power supply for receiving the first and the second electrical signals for executing logic operation process, when at least one of the first and the second electrical signals is at the first level, a third electrical signal of a third level is outputted, when both the first and the second electrical signals are at the second level, a third electrical signal of a fourth level is outputted; and at least a discharge module for receiving the third electrical signal, when the third electrical signal is at the third level, the discharge process is skipped, when the third electrical signal is at the fourth level, the discharge process is executed. | 11-19-2009 |
20090322157 | RF AC/DC Coupling Circuit Using General Purpose Solid-State Relay - A system and method for overcoming the parasitic elements associated with off the shelf or general purpose solid-state devices configured to operate as RF AC/DC signal coupling networks. An AC/DC signal coupling network may comprise a general purpose solid-state relay device and two inductors having values carefully chosen to compensate for the imperfections and intrinsic parasitic elements associated with the solid-state relay. The inductors may also have values carefully chosen to compensate for the parasitic elements of the neighboring or coupled circuit, and for the capacitance that is associated with the printed circuit board bond pad that is directly dependent upon the area of the pad and distance to the neighboring conductors. The inductors may cause the input path to become inductive as the signal frequency increases, and also improve the input return loss over the RF input range. | 12-31-2009 |
20100194204 | SEMICONDUCTOR DEVICE - A device includes a first circuit and an adjustment circuit. The adjustment circuit performs an adjustment on impedance of the first circuit. The adjustment circuit discontinues the adjustment on impedance while the first circuit is in an activated state. | 08-05-2010 |
20100308663 | ISOLATING FAULTY DECOUPLING CAPACITORS - The present invention generally provides a decoupling capacitor circuit that is configured to determine whether a decoupling capacitor is defective. Upon determining that the decoupling capacitor is defective, the decoupling capacitor circuit may disconnect the decoupling capacitor from both, a positive segment and a negative segment of a power grid. In some embodiments, the decoupling capacitor circuit may be configured to reconnect the decoupling capacitor to the power grid upon receiving a reset signal. | 12-09-2010 |
20110187201 | METHOD AND APPARATUS FOR RESISTIVE POWER DISTRIBUTION - An electrical power distribution method and apparatus are disclosed, the apparatus comprising a first power distribution member section receiving electrical power from a power supply and a second high resistivity power distribution member section, electrically connected to the first section for supplying the electrical power to an electrical device in electrical communication with the high resistivity section. | 08-04-2011 |
20110193414 | ELECTRIC POWER SUPPLY CONTROL CIRCUIT - An electric power supply control circuit includes a bypass circuit connected in parallel with a semiconductor switch. Upon a control circuit being in an inactive state while a load being in a non-electrifying state or in a standby state, the bypass circuit connects a power source to the load. The bypass circuit includes a electrifying decision circuit that generates an activation signal for activating the control circuit in accordance with the load being put in an operation state. The electrifying decision circuit supplies the activation signal to the control circuit so as to turn on the semiconductor switch and allow electric power supply to the load through an electrifying line. | 08-11-2011 |
20120032519 | AUTOMATED SHORE POWER SYSTEM - A shore power system includes a primary switchgear, a secondary switchgear, a dual output power transformer disposed in electrical communication between the primary switchgear and the secondary switchgear, a grounding switch section, and a vessel connector assembly. The shore power system further includes an automation and control system for automating and/or controlling the delivery of power to the vessel from a source of power, such as a medium voltage power source. In embodiments of the present disclosure, the medium voltage power source may be from the power grid or may be from a discrete power generation station. | 02-09-2012 |
20120032520 | REDUCTION OF INRUSH CURRENT DUE TO VOLTAGE SAGS WITH SWITCH AND SHUNT RESISTANCE - Various systems and methods are provided for minimizing an inrush current to a load after a voltage sag in a power voltage. In one embodiment, a method is provided comprising the steps of applying a power voltage to a load, and detecting a sag in the power voltage during steady-state operation of the load. The method includes the steps of adding an impedance to the load upon detection of the sag in the power voltage, and removing the impedance from the load when the power voltage has reached a predefined point in the power voltage cycle after the power voltage has returned to a nominal voltage. | 02-09-2012 |
20120161529 | POWER FEEDING DEVICE, POWER RECEIVING DEVICE, AND WIRELESS POWER FEED SYSTEM - A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant. | 06-28-2012 |
20120200165 | SWITCHING AN INDUCTIVE LOAD - The invention relates to an arrangement and a method for switching an inductive load. Yet further the invention relates to a software product of a control system switching an inductive load. A semiconductor valve is used for switching an inductive load. The semiconductor valve comprises at least two semiconductor levels. A firing signal is supplied to the semiconductor valve. There is a determined delay between the firing signals of at least two semiconductor levels. | 08-09-2012 |
20120242157 | DEVICES HAVING DIFFERENT EFFECTIVE SERIES RESISTANCE STATES AND METHODS FOR CONTROLLING SUCH DEVICES - Devices and methods are described, such as those including parallel paths coupled between a first power supply and a second power supply. The parallel paths include different values of capacitance to reduce unwanted variations as a function of current demand frequency such as resonance. A selectable resistance is provided along one or more parallel paths, and can be varied during different times in a signal burst. | 09-27-2012 |
20130119772 | ELECTRICAL SYSTEM WITH CIRCUIT LIMITER - An electrical power distribution system automatically limits the number of substantially similar or identical power cable assemblies that are electrically energizable from a power source. A control unit is connected between the power source and the power cable assemblies, and limits the number of power cable assemblies that can be energized in the system by sensing the voltage in a sensing circuit. An applied voltage in the sensing circuit changes in a predictable manner corresponding to the number of power cable assemblies that are electrically connected in the circuit. Each power cable assembly includes an impedance element that is added to the sensing circuit when the corresponding power cable assembly is coupled to the system, and once the detected voltage is beyond a predetermined threshold value, the control unit will ensure that the power cable assemblies are not energized by the power source. | 05-16-2013 |
20130234525 | Electrical breakdown limiter for a high voltage power supply - An electrical breakdown limiter circuit and method for a high voltage power supply includes an inductor having an inductor input and an inductor output wherein the inductor is electrically coupled in series between a high voltage output of the high voltage power supply and a load, and a controllable switch electrically coupled in series with the inductor between the high voltage output of the high voltage power supply and the inductor input wherein the controllable switch is opened when an electrical breakdown event at the load is detected downstream from the inductor output that causes a high voltage at the inductor output to decrease, the controllable switch returning to a normally closed position upon clearing of the electrical breakdown. | 09-12-2013 |
20150123482 | ACTIVE DAMPING WITH A SWITCHED CAPACITOR - An active damping switching system includes an active damping switching apparatus, including a damping capacitor, a damping resistor coupled to the damping capacitor, an input switch coupled to the damping capacitor, an oscillator coupled to the input switch and configured to open and close the input switch at a frequency, a direct current power source coupled to the active damping switching apparatus, a constant power load and an input filter disposed between the constant power load and the active damping switching apparatus. | 05-07-2015 |