Abstract: Power control circuitry for controlling connection of a voltage source to a switched power rail powering an associated circuit is provided. A plurality of switch blocks are connected in parallel between the switched power rail and the voltage source, each switch block being controlled by an enable signal provided by a switch controller. The switch controller performs a turn-on sequence providing a series of enable signal patterns to the switch blocks. The switch controller applies a time varying generation operation to at least one sequence stage of a predetermined turn-on sequence to produce a corresponding enable signal pattern for that sequence stage. When the turn-on sequence is later repeated, the enable signal pattern produced for at least one of the sequence stages differs from the enable signal pattern previously produced for that sequence stage.

Abstract: A power supply arrangement is for supplying power to a chip core. A dc-dc converter arrangement is used both for a wake-up state of the core in preparation for an active state, and for a shut down charge recycling state in which the core supplies charge to the dc-dc converter. Thus, the dc-dc converter arrangement functions both to control powering on of the core in an efficient manner and the powering down of the core to implement charge recycling.

Abstract: Techniques, systems and apparatus are described for providing a voltage selection circuitry and a DC-to-DC converter having such voltage selection circuitry. The voltage selection circuitry includes a first terminal voltage sensing unit that senses a voltage of a first terminal and a second terminal voltage sensing unit that senses a voltage of a second terminal. The voltage selection circuitry also includes a comparison unit connected to the first terminal voltage sensing unit and the second terminal voltage sensing unit. The comparison unit compares the voltage of the first terminal with the voltage of the second terminal and outputs a comparison signal indicating a difference between the sensed voltages of the first and second terminals. The voltage selection circuitry includes a selection unit that selects a higher voltage from the sensed voltages of the first and second terminals in response to the comparison signal.

Abstract: A power supply system includes an AC power line with an uninterruptible power supply (UPS) device coupled to receive power from the AC power line. The UPS includes control circuitry that couples power conversion circuitry of the UPS to the AC power line when the available AC power is acceptable. The power supply system also includes a second UPS device coupled to receive power from the AC power line. The second UPS includes a timer delay, such that the control circuitry is configured to couple power conversion circuitry to the AC power line when the available AC power is acceptable, and upon expiration of the timer.

Abstract: Transfer functions of control have duty commands as inputs and battery current values as outputs, provided corresponding to respected converters. Control gains are determined such that certain transfer functions substantially match with each other, with respect to delay elements.

Abstract: A semiconductor integrated-circuit device rectifies a received carrier wave, generates a first power-supply voltage based on the rectified output, and selects, as a power-supply voltage required for operation, one of the first power-supply voltage and a supplied second power-supply voltage. The first power-supply voltage is selected as the power-supply voltage required for operation when the second power-supply voltage is lower than a threshold value. The second power-supply voltage is selected as the power-supply voltage required for operation when the second power-supply voltage is equal to or higher than the threshold value and an instruction to operate in accordance with a predetermined function is given.

Abstract: Power distribution systems that have a limited peak power capability or a high source impedance, such as site supply generators, are often susceptible to abnormal operation in response to the current drawn at power up from the loads connected to the power distribution system. The present invention provides a load control module for a lighting control system operable to start up a plurality of the lighting loads in sequence to reduce stress on the power distribution system. The lighting loads are each turned on as part of a startup sequence at predetermined times after an output voltage of the power distribution system has stabilized. The lighting control module is operable to wait for a predetermined amount of time for the startup sequence to begin before turning on the lighting loads.

Abstract: Various systems and methods for providing a pulse width modulation soft start feature in a redundant power supply are disclosed. One method involves comparing an input voltage, which is received from a load unit, to a threshold voltage. If the input voltage is less than the threshold voltage, a PWM signal is used to control a switch, which is configured to electrically couple a redundant power supply to the load unit when closed. The duty cycle of the PWM signal is then modified according to a predetermined sequence.

Abstract: A control system is provided for use with a plurality of generator sets. The control system may have a bus, an arbitration relay, a switching device, a control module, and first, second, and third discrete signal cables. The control module may be configured to receive a group start signal and initiate startup of a first of the plurality of generator sets, and to generate a signal on the first discrete signal cable based on an operational status of the first of the plurality of generator sets. The control module may also be configured to determine if the second discrete signal cable is active, to activate the second discrete signal cable and the arbitration relay based on the determination, and to activate the switching device to connect the first of the plurality of generator sets to the bus based on a status of the third discrete signal cable.

Abstract: A system for controlling a plurality of generators of a powered system, the system includes a controller configured to provide a command to energize at least a first generator and a second generator depending on an operational condition of the powered system, a switching device configured to connect the first generator and/or the second generator to the controller, and a rectifier connected between the controller and the switching device. The switch position of the switching device determines whether the first generator and/or the second generator is energized, depending on the operational condition of the powered system. A method and a computer software code for controlling a plurality of generators of a powered system are also provided.

Abstract: A device, system and method for generating alternating current (a/c) electricity directly from photovoltaic cells utilize an array of photovoltaic cell pairs that are each connected in anti-parallel to form an a/c junction. The system, device and method mechanically gradually exposes and shades photovoltaic cell pairs to sunlight to generate alternating current electricity at an a/c junction of the solar cell pairs. Gradually and alternately exposing and shading the two anti-parallel connected solar cells of each solar cell pair causes the amplitude and polarity of the electricity at the a/c junction to gradually rise and fall to produce alternating current electricity. The gradual, alternating exposure and shading of the two anti-parallel solar cells is accomplished by mechanically covering and exposing the solar cell pairs. This is efficiently accomplished by a rotating segmented disc positioned over an array of solar cell pairs.

Abstract: A regulator circuit may be configured to operate with multiple power supplies. The regulator circuit may be configured to receive an input voltage and provide a regulated output voltage at an output terminal as a function of the input voltage. The regulator may include at least two drivers. A first driver may have a driver output coupled to the output terminal and have a supply terminal coupled to a high power supply, and a second driver may have a driver output coupled to the output terminal and have a supply terminal coupled to a low power supply. A selector circuit may be configured to compare the input voltage with a control voltage that has a magnitude just below a magnitude of the low power supply, to determine which driver to select from the first driver and the second driver, and enable either the first driver output or the second driver output to be active according to which driver has been selected.

Abstract: A bi-directional DC-DC converter includes a first series circuit connected to ends of a first DC power source and including a first winding of a first reactor and a first switch; a second series circuit connected to ends of the first switch and including a second winding of the first reactor, a second reactor, a second switch, a third switch, and a second DC power source; a third series circuit connected to the ends of the first switch and including a fourth switch and the second DC power source; and a control circuit configured to turn on/off the switches and thereby carry out step-up and step-down operations between the first and second DC power sources.

Abstract: The invention concerns a method (200) and system (100) for charging a battery (110). The method includes the steps of receiving (212) an input power supply signal (300), monitoring (216) the input power supply signal to determine when the input power supply signal reaches first and second predetermined thresholds (314, 316) and in response to the monitoring step, selectively controlling (217) a charging switch (122) that controls the flow of the input power supply signal to the battery. The controlling step can include activating (220) the charging switch when the input power supply signal reaches the first predetermined threshold and deactivating (226) the switch when the input power supply signal reaches the second predetermined threshold.

Abstract: Time-sharing technique is used for power conversion to improve the thermal dissipation thereof. In a power supply arrangement to provide a supply voltage to a load, a plurality of linear regulators are so switched that each time only one of them is enabled to convert an input voltage to the supply voltage, thereby each of them suffering less thermal dissipation.

Abstract: A method for controlling a cluster of wind turbines connected to a utility grid includes the steps of determining the frequency of the utility grid, detecting a frequency deviation in the utility grid, and disconnecting the wind turbines at different predefined frequency values above the nominal frequency value. A method for planning the strategy of a utility grid including a wind turbine cluster connected to the grid and a wind turbine cluster is also contemplated.

Abstract: A transfer switch controller is for a transfer switch. The transfer switch controller includes a first input having an alternating current voltage and structured to input power from a utility power source, second inputs structured to input remote or local signals, and an output structured to output an alternating current voltage to a standby generator. A normally closed switch, such as a relay, includes a number of normally closed contacts electrically connected between the first input and the output. The normally closed contacts are normally closed to cause the alternating current voltage of the first input to be normally output to the alternating current voltage of the output. A microprocessor cooperates with the second inputs and the normally closed switch. The microprocessor causes the normally closed switch to open responsive to one or more of the remote or local signals.

Abstract: The present invention relates to a semiconductor integrated-circuit device capable of seamlessly switching a power source obtained by rectifying a carrier wave and an external power source. The semiconductor integrated-circuit device having a non-contact card function and a non-contact reader/writer function includes a rectifier 131 for rectifying a received carrier wave, a serial regulator 132for obtaining a predetermined voltage from an output voltage of the rectifier 131, and a power-supply control circuit 138 for turning on/off the voltage from a battery 160. In a case where the output voltage of the battery 160 is equal to or higher than a predetermined voltage, the power-supply control circuit 138 selects the voltage of the battery 160 as power required for operation of an IC 300 when a reader/writer mode signal or a card mode signal is received.

Abstract: A power control apparatus of a complex terminal is disclosed that includes a DC/DC converter for outputting an auxiliary power supplied from an auxiliary battery after adjusting a level of voltage of the auxiliary power to a required input voltage level of the complex terminal; a second voltage sensor for measuring voltage of a main power outputted from a main battery, and controlling the auxiliary power of the auxiliary battery to be inputted to the DC/DC converter before the measured voltage of the main power becomes lower than a predetermined voltage; and a first voltage sensor for interrupting supply of the main power from the main battery to the complex terminal and controlling the auxiliary power outputted from the DC/DC converter to be supplied to the complex terminal, when the measured voltage of the main power becomes lower than the predetermined voltage.

Abstract: The present invention is a device that includes a rectifier and a super capacitor packaged together in a single housing. The device has a first connection point that is coupled to the rectifier input. The output of the rectifier is coupled to a first side of the capacitor and to a second connection point of the device. The second side of the capacitor is coupled to ground through a third connection point. The device is operable to receive AC power and provide DC power. Moreover, through the operation of the super capacitor, the device will provide DC power for a time after AC power has been removed.

Abstract: An information handling system (IHS) includes a system board including a processor, a first battery for supplying power to the system board, a second battery for supplying power to the system board, and a switching circuit. The switching circuit is configured to repeatedly switch between the first battery and the second battery for supplying power to the system board to provide more power to the IHS than is possible if only one battery were continuously providing power to the IHS.

Abstract: A pulse generation circuit for outputting a pulse with a predetermined waveform to an output terminal in response to a start signal includes a circuit adapted to generate a plurality of signals {Di|i denotes an integer in a predetermined range}, which has predetermined amounts of time differences from the start signal, based on the start signal, a plurality of power supplies {Ej|j denotes an integer} adopted to supply electric energy of a predetermined electric quantity, and a switching circuit adapted to sequentially switch the power supplies {Ej} in a predetermined order in accordance with logical function values of at least a part of the signals {Di} to connect the power supplies {Ej} to the output terminal.

Abstract: A motorized portable appliance which monitors, and automatically selects, one of multiple power sources. The motorized portable appliance includes an electric motor, a secondary battery and at least one other source of electrical power, and an automatic control to switch between the secondary battery and the other source of electrical power, which may be mains electrical power, an external secondary battery, an on-board secondary battery, an automotive battery, a solar photovoltaic array, or a primary battery. Power conditioning circuitry converts power from the various power sources to a form compatible with the electric motor and recovers remaining power from depleted primary batteries.

Abstract: An apparatus and method of boosting voltages. A boosting circuit includes a first and a second boosting circuit that each provide a boosted voltage in response to a set of control signals. The first and second boosting circuits receive different sets of control signals so that the boosted voltages may be alternately transferred to and combined at a load terminal.

Abstract: A voltage detection and sequencing circuit is provided, preferably on a single semiconductor chip, for applying a plurality of voltages to an electrical system in a predetermined sequence. The circuit includes a plurality of subsystems each adapted to detect one of a plurality of supply voltages at an input terminal and to supply the supply voltage to at least one output terminal in a predetermined sequence as controlled by a sequencing means.

Abstract: A power supply apparatus is disclosed herein. The power supply apparatus includes a power output, a first power source selectively connectable to the power output, and a second power source selectively connectable to the power output. A switch is configured to couple the first power source with the power output until the first power source becomes substantially depleted. The switch is also configured to couple the second power source with the power output after the first power source becomes substantially depleted. An indicator is configured to precisely convey the amount of power remaining in the power supply apparatus after the first power source becomes substantially depleted.

Abstract: A semiconductor device includes that a first power line supplied with first power supply voltage, a second power line supplied with second power supply voltage, a third power line electrically connected to a internal circuit; a first switch configured to electrically connect or disconnect the first power line and the third power line, a second switch configured to electrically connect or disconnect the second power line and the third power line, and a control circuit controlling the second switch to electrically connect the first power line and the third power line following a predetermined period after the first power line and the third power line are electrically connected each other based on the first switch.

Abstract: A power distribution system and method of operation, for a motor vehicle. The power distribution system includes a generator is in a parallel electrical connection with a battery and a switch. The generator is also in communication with a vehicle load circuit, while the battery is in selective communication with the generator based on the state of the switch. The switch disconnects the battery from the vehicle load circuits to isolate the battery from the vehicle load circuit and the generator output voltage, and allowing the generator to run at a voltage below the nominal battery voltage. The method includes the steps of disconnecting the battery from the generator and vehicle load, lowering the generator output voltage from the generator, and providing the generator output voltage to the vehicle circuit.

Abstract: A dual-input power converter comprises two power stages using a common low-side element, a first input for coupling a first input voltage to the first power stage, a second input for coupling a second input voltage to the second power stage, and a controller for driving the first and second power stages to convert the first or second input voltage to an output voltage.

Abstract: Usually, power supplies are not capable of switching off part of the outputs of a main power supply during stand-by. Due to this, stand-by power supplies are used in addition to operation power supplies. Consistent with an example embodiment, a forward converter is provided, including switches in the rectifier circuit thereof. Due to this, the rectifier circuits may be selectively switched on and off. Advantageously, this may allow that the main outputs of such a forward converter are switched off while on stand-by.

Abstract: Automatically changing the tap position in a load tap changer includes noting a polarity of a first tap position of a load tap changer. A duration for which one or more consecutive tap positions of the load tap changer collectively have had the noted polarity also is noted. The one or more consecutive tap positions include the first tap position. The duration for which the one or more consecutive tap positions collectively have had the noted polarity is compared to a threshold value. A change is made from the first tap position to a second tap position with a polarity that is different than the noted polarity when the duration for which the one or more consecutive tap positions collectively have had the noted polarity is longer than the threshold value. A change may be made from the second tap position back to the first tap position.

Abstract: An apparatus for selectively coupling a system with a first power supply or a second power supply includes: (a) a first switch for effecting a first coupling of the system with the first power supply; (b) a second switch for effecting a second coupling of the system with the second power supply; (c) a first switch control unit coupled for controlling the first switch; (d) a second switch control unit coupled for controlling the second switch; (e) a connection director unit coupled with the first and second switch control units for providing control signals to effect the first and second coupling; at least one of the first and second coupling being effected as an initial coupling establishing a generally time-dependent increasing current between the system and one power supply and a continuing coupling establishing a substantially constant operating current between the system and the one power supply.

Abstract: A system comprises a converter to produce an output voltage from at least a first input voltage and a second input voltage, and a selector to select a first circuit path in the converter to produce the output voltage from the first input voltage, and to select a second circuit path in the converter to produce the output voltage from the second input voltage.

Abstract: A wind park with a plurality of wind energy plants, which each have one plant control, which presets a desired value for the active power to its wind energy plant, and with a park control, which presets a desired value for the active power to be generated for each plant control and limits the active power fed by the wind park to a preset value, by shutting down a first group of wind energy plants and presetting a desired value for the active power to a second group of wind energy plants at a time, characterised in that the park control starts the wind energy plants of the first group again when the sum of the actual values of the active power of the wind energy plants of the second group has reached the preset desired value and/or a predetermined time duration has elapsed.

Abstract: The switch mode power supply includes a switching cell SC controllable cyclically and including only one inductive element L and several individually selectable outputs. During each conduction cycle, a total power level corresponding to the sum of the individual power levels respectively required by all the outputs OUTi during this cycle is injected into the inductive element L, the outputs requiring a non-zero individual power level are selected successively and in a predetermined order that is identical for all the cycles, and, at each selected output, the corresponding individual power level is produced.

Abstract: An electrical energy supply device, in particular for carriage on board an aerodyne, supplying DC current to electrical consumers from at least one electrical network chosen by a selector circuit of the supply device, from a plurality of electrical networks. The supply device includes an adapter per electrical network each of the adapters providing, from the respective electrical network to which the adapter is connected, a preset DC voltage, for supplying the electrical consumers. The choice by the selector circuit, of the electrical network and of its associated adapter supplying the electrical consumers, is dependent on the level of the preset DC voltage of said adapters. Such a device may find particular application to supplying of equipment carried on board aircraft.

Abstract: A controller is disclosed for determining that the currents from the two AC power sources are correctly phased. Required circuitry can be disposed within a housing from which extend power cables having single phase 240V AC, 50 A male connector plugs connected at remote ends. Prongs in each of plugs can be arranged so that the plugs are connectable to a 240V, single phase AC source. A power cable, having a connector at a remote end, can also extend from the housing. The power cable connector can be connected to an AC power supply. The power cable connector supply a power transformer with single phase AC power at 240V and 100 A. The circuitry can assure that the phases and voltages of the two AC sources driving the connectors are properly connected to the connectors to enable the cable to supply the power cable connector with single phase AC.

Abstract: A power source circuit capable of improving an efficiency of using energy of a chemical battery cell by responding suitably to an intermittent change in a load current, by during a load burst period in an odd-numbered order, a load is driven by power accumulated in a first power storing section and, during a load burst period in an even-numbered order, a load is driven by power accumulated in a second power storing section. The chemical battery cell does not discharge during the load burst period. Therefore, an amount of a voltage having dropped due to an internal impedance of a power supplying section becomes small and, as a result, when the power source circuit is applied to the electronic device which becomes inoperable due to a temporary voltage drop in the power source, an operational life of the power supplying section is made longer.

Abstract: A dual supply voltages converter divides a supply voltage by a constant to produce a feature voltage larger than one when the supply voltage is a first voltage and smaller than 1 when the supply voltage is a second voltage and squares the feature voltage for comparing with itself. After squared, a value larger than one will larger than itself and a value small than 1 will smaller than itself. As a result, the supply voltage is determined to be the first or second voltage and thereby to be converted to the desired output voltage.

Abstract: An apparatus and method for delivering power from a D.C. voltage source to one or more D.C. loads rated at lower voltages. The invention provides for the repetitive application of the higher D.C. voltage to the loads for a predetermined time period sufficient for the load to operate yet not too long to ensure that the load will not be damaged. To implement the invention, a clock signal provides the time reference for separate slots allocated for the time periods associated with each of the loads. A user selectively enables or interrupts the repetitive connection to each of one of the loads. The rate of repetition of the connection of the high voltage source could vary from 60 to 200 Hertz, preferably without degrading the operation of typical loads.

Abstract: A plural output control station for operating electrical apparatus, such as model electric train engines and accessories. The control station employs a data processor for monitoring and controlling the signals generated at a plurality of transformer-driven power output terminals. An exemplary station includes two variable-voltage alternating current (AC) output channels (TRACK 1 and TRACK 2) and two fixed-voltage AC output channels (AUX 1 & AUX 2). The variable-voltage outputs are controlled by a data processor responsive to respective operator-controlled throttles for varying the AC output voltage and therefore the rate of movement and direction of electric train engines, typically three-rail O-gauge model trains. The variable-voltage outputs can also be offset by the data processor with positive and negative DC voltages for enabling engine functions such as horns, whistles and bells.

Abstract: Process for electrically energizing a motor vehicle wiring circuit which has a battery, at least one electric consuming device and a fuel cell unit connected therein. The fuel cell unit is activated when the battery voltage falls below a preadjustable battery voltage limit, and when the wiring load exceeds a preadjustable vehicle wiring load; and is deactivated when the battery voltage exceeds a preadjustable battery voltage limit.

Abstract: An inverter unit converts power from a solar battery into AC power and interconnects the AC power with a utility power supply. A control circuit manages the time during which the inverter unit stops. If the time is equal to or longer than a predetermined time, it is determined that one day has passed. Data for one day stored in a memory is accordingly cleared and data is newly stored in the memory.

Abstract: The present invention provides a circuit and method having a fast response time for generating a regulated voltage from a first voltage source. The circuit includes a driver for generating a drive signal. The driver has a clock input coupled to a clock signal. A charge pump that has a first voltage input coupled to the first voltage source. In response to the drive signal, the charge pump provides a pump voltage that is boosted from the first voltage. An amplifier has a reference input coupled to a reference voltage, a sense input coupled to a sense signal representative of the pump voltage, and an output. The amplifier is operable in response to a difference between the reference voltage and the sense signal, to control the driver. A switch is coupled from the amplifier output to an output of the charge pump such that the pump voltage is controllably boosted by the amplifier output through the switch.

Abstract: A battery control system for controlling the connection of a plurality of batteries to a load is provided. The system comprises a plurality of switches and a plurality of controllers. Each switch is operable to connect or disconnect one of the batteries from the load. Each controller is operatively coupled to one of the switches. Each controller is operative to cause one of the switches to disconnect one of the batteries from the load.

Abstract: In an electric power supply for supplying electric power, after a power factor has been improved, to an equipment having a power saving mode which is transferred to the power saving mode when the equipment is not operated for a predetermined period of time, the electric power supply includes: a power factor improvement section for improving the power factor by a switching operation; and a switch provided between a power source and the power factor improvement section for switching the electric power to either the power factor improvement section or the equipment. When the equipment is transferred to the power saving mode, the electric power is supplied by the switch to the equipment without passing through the power factor improvement section.

Abstract: A power share distribution system and method. Included are: a plurality of power supplies; an isolator provided for each power supply of the plurality of power supplies for selectively blocking/passing an output power from the power supply; and a controller controlling each isolator for passing an output power of each power supply for a predetermined time, such that different groups (including groups of 1) of the plurality of power supplies supply output power to a load at different times. In a preferred embodiment, the power supplies are more particularly current supplies. Further, in a preferred embodiment, the controller more specifically passes an output current of each current supply such that each current supply supplies current to the load for mutually exclusive times.

Abstract: A power supply includes a turn on circuit which coordinates turn on of all paralleled power supplies supplying power to an electronic system such as a computer system. Upon detecting that its input voltage is sufficient to turn on, the power supply waits for a delay period long enough to ensure readiness of any of the paralleled power supplies and then determines that it can start independently. Upon detecting bus voltage sufficient to ensure that another power supply has turned on, the power supply determines that another power supply has turned on. If either condition is determined, the power supply turns on and begins supplying power to the computer system. As a result, the first power supply to turn on will be detected by the other power supplies, and the other power supplies will turn on immediately thereafter.

Abstract: A method and device for supplying electrical energy to an electrical load using a set of chargeable and dischargeable direct current sources is provided. In a first step, all the direct current sources of the set are charged. In a second step, the first of the set of direct current sources is connected to the load in order to supply electrical energy to the latter. After a predetermined time, the connection between the first direct current source and the load is broken. The two preceding steps are repeated for each following direct current source. The three preceding steps are repeated, during which the direct current source connected to the load charges, via a charging device, at least one of the other direct current sources such that each direct current source of the set of direct current sources passes through a discharge-charge cycle.

Abstract: Circuit of multi-voltage control circuit of battery of multiple independent DC power consists of a diode compound switch contact for resisting sparkle and segmented current when multi-voltage switches add the non-sparkle switch for series of solid switch member which forms linear voltage adjustment of basic grade and voltage of low loss, or chopped wave voltage adjustment of low pulse. The advantages of the present invention are that it loses less thermal, is highly efficient, and has low pulse. It can provide fine quality graded voltage and a voltage adjustment between further grades.