Abstract: A parasitic power supply provides for drawing power for an auxiliary device from a set of sequentially driven loads. A typical source of power is a traffic signal wherein the power may be sequentially applied to red, green and yellow lamps. The design provides isolation between loads so no two loads will be powered through any single-point failure of the power supply. The device may further contain control elements such as time delays to make the system compatible with requirements of safety devices used in traffic control systems to sense burned-out bulbs, and to sense conflicts between lighting patterns that are supposed to be mutually exclusive. The device may be configured as a separate component, or it may be integrated into a traffic signal head or into any selected device intended for connecting to a traffic signal head. The invention is particularly suitable for standard systems operating nominally at 115 VAC, though other AC voltages, and direct-current supplies, can also be used.

Abstract: A system and method for detecting islanding in a Distributed Generation utility grid is described. In some examples, the system, via an inverter, injects a frequency disturbance to a location of the utility grid associated with a DG generator, measures both the frequency error due to the disturbance and the frequency drift of the location of the utility grid, and determines islanding based on a maximum value of the frequencies. In some cases, the system is able to reduce or minimize the Non-Detection Zone of the inverter by detecting islanding without always relying on a detectable frequency error due to an injected waveform.

Abstract: A touch switch apparatus for detecting the presence of an object such as a human appendage, the apparatus having a touch pad, an electric field generated about the touch pad and also having a preferably integrated and local control circuit connected to the touch pad and to a controlled device. Practical applications for touch switch apparatus, including use of touch switch apparatus in connection with other structure to emulate mechanical switches.

Abstract: A device is provided and includes an actuator, mounted to a wall box, including a power supply, a semi-conductor switch, an electrical load controller and a terminal coupled to the power supply and the controller, an actuator interface disposed to receive first commands relating to basic electrical load control by the controller and a separate interface, including a header to communicate with the terminal whereby the separate interface receives power and communicates with the controller, the separate interface being supportable at the wall box and, when the header and terminal communicate, configured to identify a type of the semi-conductor switch of the actuator and to receive second commands of a type unique to the identified actuator type and relating to the basic and enhanced electrical load control by the controller.

Abstract: A vehicle system for use in powering an AC load. The system may included an inverter system operating in cooperation with a power distribution system. The power distribution system may be configured to provide a stabilized power output to the inverter system. The inverter system be configured to inverter the stabilized power output to an output suitable for powering the AC load.

Abstract: The invention relates to a safety switching apparatus and to a method for safely switching on and off an electrical load, in particular an automated installation. The apparatus comprises a first port for a first signaling element, a second port for a second signaling element, a first switching device coupled to a first switching activator, and a second switching device coupled to a second switching activator. A time monitoring apparatus activates the first and the second switching activators only if a time between an actuation of the signaling elements is smaller than a predetermined maximum duration. The activation of the switching activators in turn causes the switching devices to be switched-through and thus the load to be switched on. For the activation of the switching activators, a first and a second switching element, which are each arranged in series with the switching activators, need to switched-through.

Abstract: A modular office wiring system comprising a power distribution module, at least one data hub, at least one ten-conductor high-voltage cable, a cable carrier, connectors, at least one power core, at least one high-voltage power module, and at least one low-voltage data module. The system may additionally include one or more splitters that provide branch power lines, with additional power cores positioned on the branch lines and additional high-voltage power modules and low-voltage data modules connected to the additional power cores. In addition, a method is provided for installing and uninstalling the modules to each other.

Abstract: An on-vehicle power supply device is connected to a vehicle battery with revealing. The on-vehicle power supply device is used for receiving a DC input power supplied by the vehicle battery, and the on-vehicle power supply device induces a plurality of high-frequency voltages through a single isolation transformer at the same time, and then transforms the high-frequency voltages to produce at least one AC output voltage and DC output voltage. In addition, the on-vehicle power supply device further includes a rechargeable battery. The rechargeable battery can be charged when the DC input power is importing. When the DC input power stops importing, the rechargeable battery is used for supplying a backup power to the isolation transformer, and the rechargeable battery keeps producing AC output voltage and DC output voltage. Hence, the present invention can achieve the effects of multipurpose, safety, and continuity.

Abstract: A resonant power transmission system for wirelessly delivering electric power to a target device. A transmitter resonant phased array includes a power source operable to source alternating current power at a target frequency. A plurality of transmitting elements, each operable to produce a non-radiated magnetic field, produces a composite non-radiated magnetic field. A plurality of transmitter tuned circuit elements couple the alternating current power to the plurality of transmitting elements. Control circuitry controls the plurality of transmitter tuned circuit elements to direct the composite non-radiated magnetic field toward the target device. Communication circuitry communicates with the target device. The plurality of transmitting elements may be a plurality of coils with the control circuitry individually controlling phase of the non-radiated magnetic fields produced by the plurality of transmitting elements by control of the plurality of transmitter tuned circuit elements.

Abstract: A capacitive sensing system for use with a power cutting tool of the type which has an exposed, moveable blade adjacent a work surface is disclosed. The sensing system drives an excitation voltage onto the exposed blade and monitors the current drawn from the blade, detects changes in the amplitude and phase and analyzes the characteristics of the changes to selectively trigger a reaction system.

Abstract: The present invention provides a power-saving laser pointer mouse including a battery, a micro-controller and a laser diode. The power-saving laser pointer mouse can be operated in multi-stage power-saving modes according to the voltage value of the battery. The lighting time interval of the laser diode is adjusted by the micro-controller according to the voltage value of the battery. When the voltage value of the battery is reduced, the lighting time interval of the laser diode is shortened so as to achieve the power-saving purpose.

Abstract: A pushbutton device for actuating an electropneumatic parking brake (EPH) of a vehicle, which is connected to an evaluating electronic unit via connecting cables. In order to detect switching processes and/or faults, the input resistance of the pushbutton device between the connecting points is evaluated, thus allowing the evaluating electronic unit to reliably detect both the switched position of the pushbutton device and potential fault conditions.

Abstract: A transmitter for sending a data transmission signal to an f electric net, whereby the apparatus comprises signal-shaping and adjustment devices (3) and connecting devices (50) including necessary accessories for connection to the electric net, signal amplifiers (20) and a connecting cable between the transmitter and the connecting point of the electric net, as for instance 230 V, 50 Hz phase rail (L) and zero rail (N) or a wall outlet as connecting points. The apparatus is divided into two or several parts, at least a first part (3) and a second part (TX/REMU), whereby second part (TX/REMU) includes at least connecting a unit (50) for connection to the electric net and a connecting cable and for connecting said second part to the electric net, whereby the length (LW) of connecting cable is under 5 m.

Abstract: A key-operated lock device having a lock, a key operable to actuate said lock, an electronic system commanded by said key, an electric power supply communicating electric power necessary to operate said electronic system, and a detection system for detecting the presence or absence of said key. The detection device is operable to command the connection with the electric power supply of said electronic system only if the key is present in, or close to, the lock.

Abstract: The inventions concerns a cable comprising a cable jacket and at least two medium voltage wires disposed within the cable jacket for transporting medium voltage current and at least two low voltage wires disposed within the cable jacket for transporting a low voltage current. Further, it concerns a wind turbine having a generator for generating electricity, wherein the generator being electrically connected to at least two medium voltage wires for feeding the generated electricity into a grid, the wind turbine having further a low voltage network for providing low voltage power to low voltage consumers, the low voltage network being electrically connected to a low voltage cable, wherein the low voltage cable and the medium voltage wires are accommodated in a common cable jacket.

Abstract: A method and a device for redundantly supplying several electric servomotors or drive motors by a common power electronics unit, particularly in an aircraft, wherein the power electronics unit contains a number of electronic motor control units, and wherein the electric motors are operated with nominal power if the electronic motor control units are fully functional. The motors are operated with the available residual power of the motor control units if partial failure of the motor control units occurs. The motors may be operated sequentially or simultaneously.

Abstract: An apparatus and method for restricting operation of a power delivery system are disclosed. In at least some embodiments, the apparatus includes a first input terminal at which is received a first command signal, and a second input terminal at which is received an additional signal. The apparatus further includes an output terminal at which is provided a control signal, and a circuit that generates the control signal based at least indirectly upon the first command and additional signals. The control signal generated by the circuit is configured to cause the power delivery system to not deliver at least one type of power when the first command signal indicates a command to do so, if the additional signal indicates an acceptability status. In some embodiments, the power delivery system is an isolation system (e.g., safety isolation system) as are employed in industrial environments, and the apparatus is a permissive module.

Abstract: An apparatus for driving a load that may include, for instance, a semiconductor chip, comprising a first switch, and a fracture sensor. The apparatus may further include, for instance, a circuit disposed outside the semiconductor chip and comprising a second switch coupled in series with the first switch, and configured such that an on/off state of the second switch is set in accordance with a state of the fracture sensor.

Abstract: A sequential power transmission between a portable user-carried battery and first and second independent accessories. At least one primary inductive coupling coil is mounted on an article of apparel worn by the user, so as to place a primary coil adjacent a first intermediary inductive coupling coil on the first independent accessory. The energizing of the first intermediary coil energizes a second intermediary coil on the first independent accessory. The second intermediary coil, when energized, energizes a secondary coil on the second independent accessory for powering the use, including the charging of the batteries of that accessory.

Abstract: Novel techniques for balancing current drawn from multiple power supply inputs. A multiple-input inductor is coupled between the power supply inputs and the switching circuits associated with the respective power supply inputs for balancing voltages applied to each of the switching circuits.