Abstract: A system according to the present invention including a main utility distribution panel which through corresponding circuit breakers, directly powers facility power line circuits which remain powered continuously, and an ‘off-peak’ utility distribution panel being powered by the main utility distribution panel through a contactor (relay, switch, etc.) controlled by a 24 hour timer, and the ‘off-peak’ utility distribution panel in turn powers facility power line circuits which may be de-energized to provide zero power draw from the main utility distribution panel during a selected time period as provided by the timer, which generally corresponds to periods when the facility is unoccupied and/or the equipment and appliances are turned off.

Abstract: A multi-output power conversion circuit is provided for converting an input voltage into a standby voltage and a first output voltage. The multi-output power conversion circuit includes a transformer, a power switching circuit, a first rectifier-filter circuit, a second rectifier-filter circuit, a first switching circuit, a voltage-adjusting circuit, a feedback circuit and a power control circuit. The feedback circuit is connected to the first rectifier-filter circuit, the second rectifier-filter circuit and the system circuit. The feedback circuit generates a feedback voltage according to a power-status signal issued by the system circuit. The power control circuit is interconnected between the power switching circuit and the feedback circuit for controlling on/off statuses of the power switching circuit according to the feedback voltage. The feedback circuit generates the feedback voltage according to the power-status signal and selectively according to the first DC voltage or the second DC voltage.

Abstract: High-voltage pulses are generated and injected in a parallel-capacitative manner into the first stage of a multistage Marx generator at suitable intervals. The high-voltage pulses result in a longitudinal overvoltage triggering of the first spark gap of the Marx generator. As a result, industrial applications are able to generate, in a fault-free manner, high-voltage pulses having a predetermined repetition rate over a prolonged period of time.

Abstract: A first voltage control unit includes a first PI control unit, a first switching unit and a first subtraction unit. The first subtraction unit subtracts an output of the first switching unit from (a voltage value)/(a target voltage) that is a voltage feedforward compensation term. Similarly, a second voltage control unit includes a second PI control unit, a second switching unit and a second subtraction unit. A switching control unit control first and second switching units during temperature increase control to operate the PI control unit for the voltage control unit on a discharge side and to cut off an output of the PI control unit for the voltage control unit on a charge side.

Abstract: A traction inverter circuit includes a first energy storage device configured to output a DC voltage, a first bi-directional DC-to-AC voltage inverter coupled to the first energy storage device, and a first electromechanical device. The first electromechanical device includes a first plurality of conductors coupled to the first bi-directional DC-to-AC voltage inverter, a second plurality of conductors coupled together, and a plurality of windings coupled between the first plurality of conductors and the second plurality of conductors. The traction converter circuit also includes a charge bus comprising a first conductor coupled to the second plurality of conductors of the first electromechanical device, the charge bus configured to transmit a charging current to or receive a charging current from the first electromechanical device to charge the first energy storage device via the first electromechanical device and the first bi-directional DC-to-AC voltage inverter.

Abstract: An automatic start-up circuit for use in an uninterruptible power supply apparatus is provided. The uninterruptible power supply apparatus includes an energy storage unit and a switching circuit. The automatic start-up circuit includes an operating status detecting circuit and a secondary switch driving circuit. The operating status detecting circuit is connected to an energy storage unit connecting node for detecting an operating status of the energy storage unit through the energy storage unit connecting node, and generating an start-up control signal according to the operating status of the energy storage unit. The secondary switch driving circuit is connected to the operating status detecting circuit, a control terminal of the switching circuit and a common terminal for determining whether the switching circuit is automatically driven to be conducted to start up the uninterruptible power supply apparatus according to the start-up control signal.

Abstract: A switching power supply with overvoltage protection includes a soft start circuit, a rectifying circuit, a filter capacitor, a main supply, an auxiliary supply and a monitoring circuit. When the input voltage is higher than the predetermined protection voltage, a first electric control switch is turned off, and the main power circuit of the switching power supply is shut off. At the moment, the actuation and release of the second electric control switch is controlled so as to control the input power supply to intermittently charge the power supply module such that the output voltage downstream of the rectifying circuit inside the power supply is controlled in a safe range. For instance, the second electric control is turned on when the output voltage is lower than a certain value, and is turned off when the output voltage is higher than a certain value.

Abstract: The present invention relates to a shock-proof electrical output device, which comprises a power outlet having a positive and a negative terminal, a voltage converter with a high voltage input and a low voltage output, a current monitoring relay device, a latching relay device, and a changeover relay device.

Abstract: A power floor tile assembly and method for providing power to furniture components via a floor structure, the tile assembly including a plurality of floor tiles, each tile including a substantially rigid supporting substrate member that includes top and bottom surfaces and an edge, at least a first conductive tile contact supported by the substrate member and extending to an exposed end and a covering layer having top and bottom surfaces and a thickness dimension between the top and bottom surfaces, the covering layer forming a separate opening for each of the tile contacts, the openings aligned with the tile contacts so that each tile contact extends through a separate one of the openings, the covering layer having a thickness dimension between the top and bottom surfaces such that the exposed end of each tile contact protrudes past the top surface of the covering layer, wherein each supporting substrate and associated covering layer are shaped such that the tile can be arranged with other tiles in side by s

Abstract: The invention comprises a terminal unit for a flat cable comprising a BNC-PCB connector having a pin for electrically contacting one or more conducting elements of a flat cable, and a current viewing resistor having an opening through which the pin extends and having a resistor face that abuts a connector face of the BNC-PCB connector, wherein the device is a terminal unit for the flat cable.

Abstract: An integral element corresponding to a converter continues an integral operation even in a period in which a voltage converting operation of the converter is suspended. The integral output integrated in this period is invalid data. Therefore, if the invalid integral output is provided from the integral element at a time at which the voltage converting operation of the converter is resumed, it follows that the converter would be controlled by an irrelevant control value. Therefore, as described above, the voltage converting operation control unit applies a reset signal to the integral element to zero-clear the stored integral output.

Abstract: The present invention is directed to a power transfer system and method for utilizing the electrical power generated by a powered vehicle, such as a locomotive. The power transfer system comprises an electromotive machine configured to generate electrical energy on the powered vehicle and an electrical system located outboard from the powered vehicle, which is configured to receive electrical energy. Interface equipment is provided, which is electrically coupled to the electromotive machine and the electrical system, to transfer electrical energy from the electromotive machine to the electrical system.

Abstract: A device for voltage supply includes a first generator and a second generator connected in parallel to it. A control unit is also provided, to which capacity utilization signals are made available by the first and the second generator. By an evaluation of the capacity utilization signals, the control unit ascertains control signals, which lead to a uniform load distribution with respect to the generators.

Abstract: Disclosed is a multi-output DC/DC converter controlling power-conversion switching in synchronization with a frequency of one output voltage among multiple output voltages in an LLC resonant DC/DC converter. The multi-output DC/DC converter includes a power conversion circuit performing alternate switching on an input DC voltage to output multiple DC voltages including a first DC voltage and a second DC voltage each having a preset voltage level, and a control circuit controlling the alternate switching of the power conversion circuit in synchronization with a preset resonant frequency.

Abstract: A print circuit board (PCB) includes a voltage regulator module (VRM), a plurality of loads, and a sense location for augmenting the voltage margin of the loads. The VRM is configured for charging the loads. Each load has a weight. The voltage value of the sense location equals to a summation of a corresponding weight value of a corresponding load multiplied by a corresponding voltage value of the load, for each of the plurality of loads on the PCB. An optimization method for the sense location on the PCB is also provided.

Abstract: A secondary side voltage regulation scheme applied to a multiple output flyback converter. The output with the highest error voltage is selected to control the primary switch. The remaining outputs are regulated by varying the length of time that current is allowed to flow into each output by controlling the on time of a switch connected in series with each of the outputs. The switching of the windings is achieved using a single N channel MOSFET for each output. Regulation of the outputs is performed using leading edge modulation. The body diode of the output MOSFET switches are held off during the start of the commutation period by the use of an active clamp on the primary side.

Abstract: A dynamic harmonic filter for an AC power system comprising at least one voltage source and at least one load is provided. The harmonic filter comprises a current sensing or voltage injection transformer connected in series with the voltage source and the load. One end of the primary of the transformer is connected to the voltage source, and the other end is connected to the load. The harmonic filter further comprises a parallel resonant LC circuit tuned to the fundamental frequency of the power system. One end of the secondary (S2) of the current injection of the voltage sensing transformer is connected to one junction of the parallel resonant LC circuit and the other end of the secondary of the current injection or voltage sensing transformer is connected to the other junction of the parallel resonant LC circuit through the secondary (S1) of the current sensing or voltage injection transformer.

Abstract: A target-closing phase-map generating section generates in advance a target closing phase map in consideration of a pre-arc characteristic and variations of a mechanical action of a breaker, and amplitude fluctuations of the load voltage. A target-closing time calculating section calculates a target closing time string from frequencies and phases of the power source voltage and the load voltage, respectively, of the breaker referring to the target closing phase map. A closing control section, when a close command 11 is inputted, controls the timing of outputting a closing control signal based on a predicted closing time and the target closing time string.

Abstract: A circuit breaker for a solar module, wherein a plurality of solar cells working in normal operation and when shaded are connected in series. At least one controlled electrical switch element serves as a bypass element and is connected in parallel with its contact gap to a plurality of solar cells. A supply circuit provides a control voltage for controlling the control electrode of the bypass element. An isolating circuit blocks the voltage applied to the contact gap of the bypass element in the normal operation and switches the voltage that is applied to the contact gap to the supply circuit when at least one solar cell is shaded.

Abstract: A power supply switch comprising a power input assembly receiving power from a power source, a power output assembly connected to an appliance and a control circuit between the power input assembly and power output assembly. The control circuit comprises a switch having an open position and a closed position and being manually resettable by a user to the closed position, wherein power is supplied from the power input assembly to the power output assembly when the switch is in the closed position; a current detection circuit sensing a current passing from the power input assembly to the power output assembly, the current detection circuit outputting an activation signal indicative of the presence of the sensed current; and a timer circuit receiving the activation signal and automatically activating a timer in response, wherein the timer sends a signal to the switch causing the switch to move to the open position after a delay time.