Abstract: A power control device prevents unauthorized and unwanted use of electrical devices by locking the plug of the electrical device in the power control device, when the current flowing through the power control device is stopped. The device includes a switch, moveable between on and off conditions by moving a slide lock or bolt, typically by rotating a key in a locking structure. When the slide lock has moved into contact with the switch, such that it is in an off-condition and current is not flowing through the power control device, the slide lock has also locked the plug in the power control device. The electrical device is temporarily inoperable and can not resume normal operation until the power control device is unlocked.

Abstract: Circuit arrangement and method for reducing electromagnetic interference. The circuit arrangement includes a supply potential connection, a reference-ground potential connection, a controllable impedance element, a signal generator, and a circuit unit. The controllable impedance element is connected between the supply potential connection and the reference-ground potential connection, and has a control connection for receiving a control signal for controlling the impedance of the impedance element. The signal generator is coupled to the control connection of the impedance element. The circuit unit is connected between the supply potential connection and the reference-ground potential connection, and originates the electromagnetic interference during operation. The signal generator is designed to produce the control signal, which varies over time, in such a manner that the electromagnetic interference which originates from the circuit unit during operation is changed.

Abstract: A super capacitor energy storage supplementing a battery providing power to a direct current bus including charge and discharge converters is disclosed. A bank of super capacitors may be charged by a battery with a pulse-width modulation controller and an electromagnetic interference filter. The bank of super capacitors may be controllably connected to the direct current bus through an isolating transformer implemented as a isolated boost converter.

Abstract: A pick-up is provided for an Inductively Coupled Power Transfer (ICPT) system having a parallel tuned resonant pick-up circuit. The pick-up has a plurality of independently controllable power supply outputs. This allows a first output to supply a high voltage load (e.g. 300V-550V) and one or more additional outputs for supplying other loads such as control circuitry which may only require 24V. The one or more additional outputs may be supplied via a current transformer connected in series with the resonant pick-up circuit. Control for each output may be achieved by partially or completely decoupling the pick-up from a primary conductive path of the ICPT system.

Abstract: An AC voltage conditioner to be connected between a source of AC line voltage or non-linear voltage and one or more AC-powered devices (e.g., audio/video, medical and scientific equipment) to improve the performance of the devices by reducing the effects of interference and distortion often caused by an AC electromagnetic field or radio frequency interference in the vicinity of the devices. A pair of AC current conducting plates are respectively electrically connected between positive and negative output terminals of the AC line voltage source and positive and negative input terminals of each AC-powered device. The pair of AC current conducting plates are interposed between and separated from three DC current carrying plates. The DC current carrying plates are connected in electrical parallel with one another between positive and negative output terminals of a DC voltage generator.

Abstract: An uninterruptible power supply (“UPS”) includes an input module having a plurality of inputs, and at least one jumper element configured to selectively couple at least one input of the plurality of inputs to at least one other input of the plurality of inputs. The plurality of inputs and the at least one jumper element may be constructed and arranged to selectively achieve the following configurations: single power feed, single phase input and single phase output; dual power feed, single phase input and single phase output; single power feed, three phase input and single phase output; dual power feed, three phase input and single phase output; single power feed, three phase input and three phase output; and dual power feed, three phase input and three phase output. Other embodiments and methods of selectively achieving multiple power configurations are also disclosed.

Abstract: It is intended to provide a control circuit of power supply, a power supply and a control method thereof capable of achieving power saving in an integrated circuit and reducing a delay time of the integrated circuit. The control circuit 50 of a power supply 10 which outputs plural DC voltages VCC, VBGP, VBGN each having a different voltage value includes a voltage changing portion SW1 which detects an output current I1 relating to a first DC voltage VCC which is one of the plural DC voltages and sets at least one DC voltage except the first DC voltage VCC based on the detected output current I1, and the like.

Abstract: Apparatus for delivering operating power from a data terminus to a utilization device includes a first data connection connecting the data terminus to a data repeater station and a second data connection connecting the data repeater station to the utilization device. A first power sourcing equipment delivers DC operating power to the data repeater station over a physical layer of the first data connection. A second power sourcing equipment at the repeater station receives operating power over the physical layer of the first data connection and delivers operating power over a physical layer of the second data connection to the utilization device.

Abstract: A current controller for a spacecraft comprises ripple regulators and a pulse width modulated regulator. Ripple regulators receive current from associated current sources and pass current to or shunts current away from the bus. The pulse width modulated regulator receives current from another current source and passes a portion of the current to the bus. This regulator varies its set point to float between ripple regulators passing current and the ripple regulators shunting current and adjusts a portion of current that is shunted away from the bus. The current shunted by the regulators form a total shunt current. The variable set point of the pulse width modulated regulator varies as the total shunt current varies. The ripple regulator set points do not vary in this manner. An error generation circuit generates an error that adjusts the ripple regulator and the pulse width modulated regulator to a desired bus voltage level.

Abstract: A polyphase power distribution and monitoring apparatus having sets of outputs for each phase of power and monitors for each phase of power disposed in the housing. Each monitor provides a visible display of current for an associated phase of power and an audible alarm for each phase of power if the current exceeds a predetermined value or falls below a predetermined value. In three-phase wye power systems, the apparatus preferably includes a neutral line monitor, including a neutral line current display and audio alarm, for the neutral line of the wye power circuit. The apparatus preferably is lightweight, elongated, portable, and mountable to the side of an electronic equipment rack. It may also include additional power monitoring systems such as network power monitoring tools for remotely monitoring the apparatus.

Abstract: A load control system and apparatus to control the load to different elements is disclosed. The load control system is attached to both an air conditioner and a pool filter system. The pool filter system has a predetermined run time and is only operating when the air conditioner is not. When the air conditioner turns on, the load to the pool filter system is disconnected. When the air conditioner turns off, the load is returned to the pool filter which resumes running at the point in the run time where the pool filter had previously left off. The load control system provides a more efficient and better use of energy resources.

Abstract: Energy stored in bypass capacitors in a portable device may be conserved when a power supply voltage is collapsed reducing the need to recharge the bypass capacitors and thereby saving power. A bypass charge saving circuit includes a bypass capacitor, a power source having an output supply voltage that is switchable, a load circuit of the portable device coupled to the output supply voltage, and the bypass capacitor operable to filter the output supply voltage. Also, a transistor switch is operable to decouple a discharge path of the bypass capacitor through the load circuit when the transistor switch is disabled. Further, a controller is operable to turn off the output supply voltage and the transistor switch in order to conserve energy stored in the bypass capacitor.

Abstract: Power-generating units and compressor units are arranged in a compressed-air energy storage power station. According to one aspect of the invention, a common grid connection transformer is arranged, to which the power-generating units and the compressor units can selectively be connected. According to a further aspect of the invention, the power-station installation is subdivided into a power-generating area (I) in which the power-generating units are arranged, a switching and voltage-conversion area (II) in which a grid connection transformer is arranged, and a compressor area (III) in which the compressor units are arranged. The stated areas are arranged physically separately from one another. Power-station installations according to the invention can advantageously be combined to form modular power-station centers, which advantageously have common voltage rails and media rails.

Abstract: A threshold voltage control circuit includes a first voltage supplying unit for supplying a first power supply voltage, in response to an enable signal which is activated when a bank is enabled, as a back bias voltage of a first MOS transistor, wherein the first MOS transistor drives an internal voltage, and a second voltage supplying unit for supplying a second power supply voltage, in response to the enable signal, as the back bias voltage of the first MOS transistor.

Abstract: A modular irrigation controller includes a processor for executing a watering program and turning a plurality of irrigation valves ON and OFF in accordance with the watering program. The irrigation controller includes a plurality of receptacles for each receiving a station module including a station module circuit connectable to a corresponding one of the irrigation valves. A manually actuable mechanism locks the station module in the corresponding receptacle and applies power to the processor when the station module is locked.

Abstract: A secondary power source system, includes a first unit receiving a primary power input and restricting a current used for charging to a predetermined amount, a second unit including a device providing capacitance, receiving a first output from the first unit with restricted current, a third unit generating a second output of a certain voltage, and a fourth unit performing a logical OR operation with the primary power input, first output from the first unit and second output from the second unit, to generate a single third output of a certain voltage.

Abstract: A switching system. The switching system includes an optical component, an electromagnetic switch, an auxiliary adjustment structure, and a control circuit. The optical component reflects or refracts a light. The electromagnetic switch, on one side of the optical component, controls the optical component to rotate or move in a direction. The auxiliary adjustment structure, on the optical component, controls the optical component to rotate or move in other direction. The control circuit, coupled to the electromagnetic switch, adjusts an on-off signal of the electromagnetic switch by a native frequency of the switching system, wherein the native frequency is obtained from an initial signal.

Abstract: A smart switch for control of a lighting load from an AC voltage source can replace any switch in a three-way lighting control system. The smart switch can be connected on the line-side or the load-side of a three-way system with a standard three-way switch in the other location. The switch includes two semiconductor switches to control the connected lighting load. The switch preferably includes two sensing circuits for detecting the voltages at two of the load terminals of the switch to determine the state of the connected three-way switch(s), and thus, the load.

Abstract: A device (ES) for distributing power between n cathodes (Ki) of at least one multipolar stimulating electrode (EM) comprises at least one anode (A), wherein n is equal to or greater than two. Said device (ES) comprises a reconfigurable current mirror (MC) which is provided with n outputs (K?i) connectable to said n cathodes (Ki), respectively and supplies to the n (K?i) outputs n complementary fractions of a control current having respective selected values which are substantially constant at the control current amplitude variation in order to carry out a substantially constant spatial location of stimulation.

Abstract: A power adapter for a peripheral device such as portable electronics device is disclosed. The power adapter includes a housing that contains electrical components associated with the power adapter. The power adapter also includes a data port provided at a surface of the housing. The data port is configured to provide external power to the peripheral device.