Abstract: Systems and methods for integrated network devices utilizing low-power technologies are disclosed. In some embodiments, a method may include receiving, over one or more pairs of low-voltage wires (e.g., telephone wires, intercom wires, security system wiring, etc.), an electrical current sufficient to power an electronic device disposed within a controlled-environment facility (e.g., a jail, prison, etc.). The method may also include performing an electronic operation within the facility and transmitting, to a communication system serving the facility over the low-voltage wire(s), information related to the operation. In some implementations, the electronic device may be a mobile phone detection apparatus, a wireless access point, and/or a surveillance device. The method may also include, during a first time interval, using the electrical current to store a charge in a battery, and, during a second time interval, using the current in addition to the charge stored in the battery to perform the operation.

Abstract: A method and device for modulating a five-level inverter, and a photovoltaic system are provided. The method includes: acquiring a voltage command value Vcmd of a phase bridge; controlling a first and a fourth switching devices to be switched on alternately when Vcmd?V1Pos+Vthrs1; controlling the first and a third switching devices to be switched on alternately when V1Pos?Vthrs2?Vcmd<V1Pos+Vthrs1; controlling the fourth and the third switching devices to be switched on alternately when 0?Vcmd<V1Pos?Vthrs2; controlling the third and a fifth switching devices to be switched on alternately when ?V1Neg+Vthrs3?Vcmd<0; controlling the third and a second switching devices to be switched on alternately when ?V1Neg?Vthrs4?Vcmd<?V1Neg+Vthrs3; controlling the fifth and the second switching devices to be switched on alternately when Vcmd<?V1Neg?Vthrs4.

Abstract: A control device for a voltage source converter connected to a wind farm is provided. The control device includes: a power source monitor unit sensing a direct current (DC) voltage of a whole grid connected to the voltage source converter; and a control unit comparing the DC voltage of the whole grid sensed with a reference voltage, wherein the control unit adjusts an alternating current (AC) supplying to the wind farm to a setting when as a result of comparison, the DC voltage of the whole grid sensed is out of a preset range of reference voltages.

Abstract: The invention is related to an apparatus comprising a switch configured to variably connect a device circuit of an electronic device to a battery, a cutout control circuit connected to the switch and comprising a supply power input and a cutout activation input, wherein the cutout control circuit is configured to turn the switch on when a supply voltage is connected to the supply power input. The invention is further related to a drug delivery device for delivering at least one drug agent comprising an apparatus of the aforementioned kind, a charging connector for a drug delivery device of the aforementioned kind and a method for manufacturing a drug delivery device of the aforementioned kind.

Abstract: A dual function solid state power converter operable from a three phase AC input current simultaneously provides; an AC or DC output current on an aircraft power cable to provide ground power to a parked aircraft, and a low voltage DC current on a battery charging power cable to charge batteries in nearby service vehicles. The power converter includes an AC to DC converter which converts the current on an internal DC bus, a DC to AC converter which converts the DC bus current to an AC current at a higher voltage and frequency, or a DC to DC converter which converts the DC bus current to a lower voltage DC, for supplying ground power to a parked aircraft, and a DC to DC converter for converting the DC bus current to a lower voltage battery charging current on the battery charging cable.

Abstract: A vehicle electrical system includes a first system branch with a first nominal voltage U1, a second system branch with a second nominal voltage U2, at least one DC/DC converter configured to transmit energy between the first and second system branches, a first actuating unit to actuate the DC/DC converter(s), a first detection unit to detect an instantaneous voltage Uact,1 of the first system branch, and a comparison unit to compare the detected instantaneous voltage Uact,1 to a first upper voltage threshold value Uo,1 and to a first lower voltage threshold value Uu,1, wherein Uu,1<U1<Uo,1. The first actuating unit actuates the DC/DC converter(s) such that energy is transmitted from the first system branch to the second system branch if Uact,1>Uo,1, and such that energy is transmitted from the second system branch to the first system branch if Uact,1<Uu,1.

Abstract: A wireless power transmission system and a method for increasing a coupling efficiency by adjusting a resonant frequency are provided. A device of the wireless power transmission system includes a resonator configured to transmit a wireless power, and a communication unit configured to receive information from another device. The device further includes a controller configured to determine a power transmission efficiency based on the information, and adjust a resonant frequency of the device, a resonant frequency of a relay device, and a resonant frequency of the other device, if the power transmission efficiency is less than or equal to a predetermined reference efficiency.

Abstract: The invention relates to a grid synchronizer for connecting an AC output of a power converter to the AC grid mains. In one aspect the invention provides a grid synchronizer comprising an inverter controller to control an AC output of the inverter, the controller including a receiver to receive grid data from a grid sensor location remote from said inverter. In another aspect we describe techniques for rapid removal of charge from a control terminal of a power switching device such as a MOSFET, IGBT or Thyristor using a particular driver circuit.

Abstract: A method for use in reducing an inductance of a circuit including a commutation loop defined at least in part by a source conductor and a return conductor between a first component and a second component is described. The method includes disposing a conductive inductance reducer within the commutation loop. The conductive inductance reducer includes an electrically conductive material and an insulator.

Abstract: An AC power adapter for a plug-in electric vehicle has a connector for reception in a charging port of the plug-in electric vehicle, at least one AC outlet coupled to the connector and command generation circuitry coupled to the connector for generating a command that causes the plug-in electric vehicle to put itself into a power feedback mode wherein AC power generated by the plug-in electric vehicle and provided to its charging port is coupled through the connector to the AC outlet.

Abstract: A modular multilevel converter for hybrid energy storage includes a battery. Three phases are connected in serial to the battery and in parallel to one another, each phase having two arms of sub-modules and buffer inductors. Each of the sub-modules includes a half-bridge and an ultracapacitor. A control module is configured to control the battery output power and ultracapacitor output power independently.

Abstract: The invention relates to an arrangement and a method for contactless energy transmission by means of induction. There are a plurality of coils arranged in a matrix, the coils having at least one conductor that surrounds a central axis of the coil at least once in one turn. The central axis stands vertically on the surface surrounded by the conductor in the geometric center of area of the surrounded surface. The coils are arranged adjacent to one another in a planar unit that extends in a first dimension, in a second dimension, and in a third dimension. The extension of the planar unit in the first dimension and in the second dimension is significantly greater than in the third dimension. The central axis of each coil stands at least locally at least nearly perpendicular to the surface spanned by the first dimension and the second dimension. The coils are also arranged in a regular manner within the planar unit in rows and/or columns such that each coil has at least two or three immediately adjacent coils.

Abstract: A wireless power enabled apparatus includes a wireless power receiver. The wireless power receiver includes a receive coil, a rectifier, a regulator, and a damping circuit. The receive coil is configured to generate an AC power signal responsive to a wireless power signal. The rectifier is configured to receive the AC power signal and generate a DC rectified power signal relative to a rectified ground signal. The regulator is operably coupled with the rectifier to receive the DC rectified power signal and generate an output voltage. The damping circuit is operably coupled between the DC rectified power signal and the rectified ground signal and in parallel with the regulator. The damping circuit is configured to suppress audible harmonics generated by the wireless power receiver at some loads by providing a damping impedance for the DC rectified power signal.

Abstract: A socket system for the protection against lightening of an aircraft disposed between a connection terminal of the aircraft and an end connector of a generator set powered by a power supply cable having several electrical conductors includes an extension socket connected between the end connector and the connection terminal and a safety device including in a housing made of electrically insulating material, and clipping means designed to clip an electrical signal. The installation of such a safety device prevents the propagation of an electrical overvoltage beyond the safety device.

Abstract: A wireless power transmission system and a method for increasing a coupling efficiency by adjusting a resonant frequency are provided. A device of the wireless power transmission system includes a resonator configured to transmit a wireless power, and a communication unit configured to receive information from another device. The device further includes a controller configured to determine a power transmission efficiency based on the information, and adjust a resonant frequency of the device, a resonant frequency of a relay device, and a resonant frequency of the other device, if the power transmission efficiency is less than or equal to a predetermined reference efficiency.

Abstract: A polyphase power dispatching system and a polyphase power dispatching method are provided. The polyphase power dispatching system includes an electric meter, a single-phase electricity storage module, a switch and a control circuit. The electric meter can measure transmission statuses of power transmission lines of a polyphase power line group. The common terminal of the switch is connected to the single-phase electricity storage module. The selection terminals of the switch are connected to the power transmission lines in a one-to-one manner. The control circuit is connected to the electric meter and the switch. The control circuit can correspondingly control the switch based on the transmission status of each power transmission line, so that the switch selectively connects the single-phase electricity storage module to one of the power transmission lines.

Abstract: A wireless power enabled apparatus including a wireless power receiver. The wireless power receiver includes a receive coil configured to generate an AC power signal responsive to a wireless power signal. A rectifier is configured to receive the AC power signal and generate a DC rectified power signal. A power transistor in a pass-transistor configuration is configured to receive the DC rectified power signal and generate an output power signal. A compensation current source operably coupled to the output power signal is configured to maintain a substantially constant voltage on the output power signal by adjusting a current through the compensation current source during a communication period employing backscatter modulation on the receive coil.

Abstract: Disclosed is a wireless power apparatus to repeat power between a wireless power transmitter and a wireless power receiver. The wireless power apparatus includes a resonant coil resonance-coupled with the wireless power transmitter to wirelessly repeat the power, an induction coil for transferring, to a load, a power generated through coupling the induction coil with the resonant coil and a detecting unit for detecting an existence of the wireless power receiver, wherein the wireless power apparatus operates in one mode of a power reception and a power repeat mode according to a result of a detection of the wireless power receiver, wherein the power reception mode is supplying the power to the load and the power repeat mode is transferring the power the wire-less power receiver.

Abstract: The present invention relates to a method and system for monitoring the secondary electric power distribution grid with remote fraud and power theft detection, readings, power cuts-off, reconnection and client load control, besides continuous monitoring of the electric grid parameters, providing diagnostics on the status of the grid and public lighting from an assigned Command Central, located at the secondary busbar of the distribution transformer, and Measuring Modules at clients installations.

Abstract: A method for setting energy supply parameters of a field device electrical current supply module. The field device electrical current supply module is connected, in such case, exclusively to one field device. The connected field device can be supplied electrical energy by the field device electrical current supply module. In the method, a field device type of the connected field device is identified first by the field device electrical current supply module. Then, a parameter setting of at least one energy supply parameter of the field device electrical current supply module is automatically read out from a database and this is loaded into the field device electrical current supply module.