Abstract: Various embodiments provide techniques and devices for scheduling power loads in devices having multiple batteries. Loads are characterized based on the power required to serve them. Loads are then assigned to batteries in response to the type of load and relative monitored characteristics of the batteries. The monitored battery characteristics can change over time. In some embodiments, stored profile information of the batteries can also be used in scheduling loads. In further embodiments, estimated workloads can also be used to schedule loads.

Abstract: A motherboard supply circuit includes a motherboard and a control circuit coupled to the motherboard. The motherboard is configured to couple to a power supply. The power supply is configured to supply power to a notebook computer and charge a battery. The power supply is also configured to supply power to the motherboard via the control circuit. The motherboard is configured to switch off the control circuit when detecting the notebook computer is in stand-by, thereby enabling the power supply not to supply power to the motherboard. The motherboard is also configured to switch on the control circuit upon detecting that the battery needs to be charged, thereby stopping the power supply from supplying power to the motherboard.

Abstract: A radiation hardened active OR circuit for providing a controlled electrical response in radiation-intensive applications. The circuit can include a first voltage source; a second voltage source; a comparator for sampling the first voltage source and the second voltage source; a first switch; and a second switch. The comparator can select a higher magnitude of the first voltage source and the second voltage source and connects the higher magnitude of the first voltage source and the second voltage source to a common output by steering a drive signal to one of the first switch or the second switch.

Abstract: Inverter control device is provided. First correcting-signal providing unit of the inverter control device provides a signal reflecting an active power correcting signal. Active power control unit of the inverter control device generates an angle control signal reflecting an output voltage phase of an inverter. Second correcting-signal providing unit of the inverter control device provides a signal reflecting a reactive power correcting signal. Reactive power control unit of the inverter control device generates a control signal reflecting an output voltage amplitude of the inverter. Processing unit of the inverter control device receives a feedback signal reflecting an output current of the inverter, a feedback signal reflecting an output voltage of the inverter, the angle control signal, and the control signal, and outputs a signal reflecting the active power of the inverter, a signal reflecting the reactive power of the inverter, and a voltage command signal.

Abstract: A wearable device includes a sensor, auxiliary electronics, a primary power supply configured to harvest radio frequency (RF) radiation received from an external reader and use the harvested RF radiation to power the sensor, and an auxiliary power supply configured to harvest energy other than that received from the external reader and use the harvested energy to supply power to the sensor and/or the auxiliary electronics. The external reader may supply less power in response to operation of the auxiliary power supply. Additionally or alternatively, in response to a determination that the auxiliary power supply is unable to supply power, the wearable device may disable all auxiliary electronics but for the sensor. In response to a determination that the primary power supply is unable to supply power but the auxiliary power supply is able to supply power, the wearable device may retain operating parameters in the memory storage unit using the auxiliary power supply.

Abstract: The aim of the invention is to use a separate device between the analog and digital communications lines to convert the digital load sharing information from the digital communication line to the analog communication line and vice versa. The device does not generate power itself for the load sharing and therefore does not disturb the load sharing of the generators on the both sides of the device. The device can be seen as a gate between the digital communication line and the analog communication line. The device simulates load situation of the generator/s connected to the digital communication line for load sharing with other generator/s connected to the analog communication line, and similarly it simulates load situation of the other generator/s connected to the analog communication line for load sharing with the generator/s connected to the digital communication line.

Abstract: A power supply device (10) includes a plurality of constant current output circuits (14) that can supply power to a load (12). The constant current output circuit (14) includes a pulse generation unit (20) that generates a pulse voltage, and a communication unit (34) that transmits and receives drive information, between the constant current output circuit (14) and the other constant current output circuit (14). When an abnormality occurs in the constant current output circuit (14) supplying power to the load (12) and the constant current output circuit (14) supplying power to the load (12) is switched to the other constant current output circuit (14), the other constant current output circuit (14) drives the pulse generation unit (20) by using the drive information that has been received through the communication unit (34) from the power supply means having supplied power to the load.

Abstract: A method for providing control power for an electricity network in which at least one energy store connected to the electricity network supplies energy to the electricity network as required and/or takes up energy from the electricity network as required, the control power being delivered in dependence on a frequency deviation from a setpoint value of a network frequency, a tolerance with respect to the frequency deviation being used to set a charging state of the energy store at a same time as providing the control power by the energy store. A device for carrying out such a method includes a control system and an energy store, the device being connected or connectable to an electricity network, the control system being connected to the energy store and controlling the control power that is given off and/or taken up by the energy store.

Abstract: A power supply control apparatus is connected to an electric device to control supply of power to the electric device. The apparatus includes a main power switch to apply or interrupt main power to the electric device, the main power being external input commercial AC power, an auxiliary power storage unit supplied and charged with the main power as auxiliary power, a charging/discharging unit including a charging circuit to convert the main power into DC power and charge the converted DC power in the auxiliary power storage unit, and a discharging circuit to convert the DC power in the auxiliary power storage unit into AC power and discharge the converted AC power to the electric device, and a controller to control the main power switch, and control the charging/discharging unit to selectively drive the charging circuit or the discharging circuit.

Abstract: The present invention relates to a redundant power supply system for wind turbine control systems, said power supply system being adapted to supply power to one or more power consumers of a wind turbine control system, the redundant power supply system comprising a first power rail, a second power rail, and switching means being adapted to select the first or the second power rail so as to provide power to at least part of a power consumer from either the first power rail or the second power rail. The invention further relates to an associated method.

Abstract: A fast blocking switch includes, for example, an energy storage device, a first power switch and a second power switch. The energy storage device stores a charge for fast activation of the switches. The first switch is operable for coupling input current to an output terminal in response to the coupling of a potential supplied by the stored charge to a control terminal of the first switch. The second switch is operable for coupling a limited amount of the input current to the output terminal in response to the coupling of a potential supplied by the stored charge to a control terminal of the second switch.

Abstract: A hybrid power supply device of an air-conditioner for supplying multiple electric power sources to a DC rail of an inverter of a DC brushless motor of the air-conditioner to drive the operation of the DC brushless motor is introduced. Two power sources may be selectively fed into the inverter of the DC brushless motor to provide hybrid power sources to the air-conditioner in a low cost simply by connecting the outputs of two one-way rectifiers. In addition, a voltage boost circuit is provided to program each source as the main power source and a backup power source. With the skillful arrangement of a simple circuit, the air-conditioner achieves the hybrid power supply effect with a multiple of controllable power sources.

Abstract: Some of the embodiments of the present disclosure provide an apparatus for sensing a voltage level of an output voltage that is selected from at least two voltage supplies, including: a maximum voltage generator circuit configured (i) to determine a voltage supply among the at least two voltage supplies that has a higher voltage level and (ii) to output a maximum voltage signal having a voltage level corresponding to the higher voltage level; and a sensing module configured to selectively sense the output voltages, the sensing module comprising a switch circuit configured to apply the maximum voltage signal to completely turn off supply of the output voltage when the output voltage is not to be sensed at the sensing module.

Abstract: Systems and methods for responding to electric power grid conditions may include identifying a portion of the electric power grid for power response, identifying at least one mobile energy resource and at least one connection site, and dispatching the mobile energy resource to a connection site.

Abstract: The present invention provides an improved grid connected solar micro-inverter. The solar micro-inverter is provided with a single processor that performs both the functions for the control of the micro-inverter and runs the application program associated with it and implements a communication modem for connectivity to the grid or to the Internet cloud. The solar micro-inverter therefore needs only a single processor to perform both the micro-inverter control and modem communication functions, resulting in cheaper and smaller system implementation.

Abstract: A method of operating an automatic transfer switch to switch an electrical load from one power source to another power source includes measuring one or more characteristics of a switching circuit in the automatic transfer switch. A value of one or more timing variables is determined based on the measured characteristics of the switching circuit. The switching circuit is operated to close relays in the automatic transfer switch. The timing of closing of the relays is based on the value of the timing variables.

Abstract: This invention comprises a method and apparatus to integrate underutilized Electric Vehicle battery packs with similarly underutilized solar PhotoVoltaic grid-tied inverters via an EVPV apparatus to provide ancillary services to the electric grid at night when the vehicles are parked and the sun is not shining.

Abstract: The present invention provides an integrated system for the combined purpose of electricity generation and water treatment and biofuel production. The configuration combines complementary sub-systems whereby outputs from one system are used as inputs to another creating a positive feedback mechanism that significantly increases system efficiency and output. Compensatory mechanisms between system components create a natural hedge in energy and water production against temporal variation in solar insolence levels. Secondary benefits of the invention may include carbon abatement, ground water improvements, and land regeneration.

Abstract: In an electric power system with a distributed power source, a fluctuation of its system voltage is brought about by an amount of power generation of the distributed power source that depends on weather. Stabilization of the system voltage is realized by generating a driving signal of a switch that the system has from weather forecast information and power system information and switching a configuration of the system.

Abstract: An electrical circuit for a power converter includes a first switching device proximate an AC source. The circuit also includes a voltage measurement device proximate a DC link and extends between the AC source and the DC link. The circuit further includes a DC voltage source and a first capacitive device. The first capacitive device is positioned between the first switching device and the voltage measurement device. The circuit further includes a second switching device positioned between the first capacitive device and the voltage measurement device. The circuit also includes a controller operatively coupled to the DC voltage source, the voltage measurement device, and the switching devices. The controller is configured to open the second switching device when a measured voltage signal generated by the voltage measurement device is substantially representative of a reference voltage value.

Abstract: The disclosure relates to a method for operation of a photovoltaic installation for feeding electrical power into a medium-voltage power supply grid, with the photovoltaic installation having a plurality of photovoltaic modules, at least one inverter and at least one medium-voltage transformer, and with the primary side of the medium-voltage transformer being connected directly to an alternating-current (AC) low-voltage output of the inverter, and at least one direct-current (DC) switching member being arranged between the photovoltaic modules and a DC input of the inverter. When the electrical power produced by the photovoltaic modules in the photovoltaic installation is not sufficient for feeding electrical power into the supply grid, the photovoltaic modules are disconnected from an inverter on the DC voltage side while, in contrast, the inverter remains connected to the medium-voltage power supply grid on the AC voltage side by the medium-voltage transformer.

Abstract: The AC-DC power booster includes an electromagnetic interference (EMI) filter circuit that is included to convert alternating current (AC) power from among applied AC power and direct current (DC) power, to DC power to be output; a power factor correction (PFC) circuit that is connected to the EMI filter circuit and stabilizes an output voltage; and a switching mode power supply (SMPS) circuit that is connected to the PFC circuit and is capable of generating AC and DC power at the same time; a maximum power point tracking (MPPT) circuit that applies the voltage output from the SMPS circuit between a drain and a source of a switching device; a battery that is charged by receiving power from a solar light energy source connected to the MPPT circuit; and an inverter that operates an AC home appliance with the power received in the battery.

Abstract: A system and method for managing and controlling charging of electric vehicles via charging stations over an advanced metering infrastructure is provided. Smart meters are deployed in the charging stations. Electric vehicle clusters which are logical representations of at least the charging stations are created. Policies for controlling electric vehicle charging based on data obtained using the electric vehicle clusters are generated. Further, it is analyzed if meter data obtained from the smart meters using the electric vehicle clusters comply with the generated policies. The meter data is obtained using the electric vehicle clusters identified with electric vehicle charging events. Policy violation action data is generated by applying predetermined rules if it is determined that the policies are violated. The policy violation action data is then sent to the identified electric vehicle clusters for controlling electric vehicle charging.

Abstract: A circuit for a switching charger includes multiple input supply nodes, and a number of charging paths. Each input supply node is connectable to a power source. Each charging path may include a middle node connected to a coupling switch and a pass transistor. The coupling switch may be configured to activate a corresponding charging path of the charging paths. A pre-charging switch may be coupled to a corresponding middle node of each charging path. The pass transistor of an activated one of the charging paths may be configured to provide a switching voltage at an input of a charging sub-circuit. The pre-charging switch may be configurable to pre-charge a middle node of a non-activated path to a high voltage to prevent an unwanted high current passing through a body diode of a corresponding pass transistor of the non-activated path.

Abstract: Provided are a network system and a method of controlling the network system supplied with energy from an energy generation component. The network system includes an energy consumption component consuming the energy generated from the energy generation component, and driving a driving component for processing or managing a consumable. The energy consumption component is provided with one or more courses classified according to a determination factor related to the consumable. The determination factor includes a performance factor denoting a processed or managed result of the consumable. One of the courses is recommended as a driving course when the energy consumption component recognizes information about the consumable.

Abstract: An electronic device includes a first supply target unit that accepts supply of power from an external power supply, a second supply target unit that accepts supply of power from a battery, a main body, and a controller, wherein the controller starts to accept supply of power from both the external power supply and the battery and starts to output, to the main body, a voltage of the power supplied from both the external power supply and the battery in a case where a predetermined time has elapsed since start of a predetermined operation of the main body while a voltage of power accepted from the external power supply has been output to the main body.

Abstract: According to one embodiment, a system includes modules to detect a node voltage and an output current of a converter, a detector to obtain an effective power value, a system condition detector to detect a power supply condition in the electric system or the operating conditions of devices included in the electric system and then output a first signal, a setting unit to switch a set value to a preset first or second value and then output the set value, a unit to calculate an angular frequency of an output voltage of the converter on the basis of an output of the detector, the value, and an output of the system condition detector, and a unit to calculate a target value of the converter.

Abstract: A method and apparatus for attenuating transmit digital to analog converter (DAC) spurs is provided. The method begins when a reference voltage is injected into an amplifier. Next, an output of the ground low drop-out regulator is measured and is them compared with the reference voltage. The output of the amplifier is then adjusted based on the results of the comparison. If the reference voltage is higher then the output of the ground low drop-out regulator the output of the amplifier is adjusted to ground. If the reference voltage is lower than the output of the ground low drop-out regulator then the output of the amplifier is adjusted to match the reference voltage.

Abstract: The highest voltage of a power supply voltage, a ground potential, and a signal voltage is output as a selection voltage from a terminal on the output side. In this case, terminals on the input side and the terminal on the output side are connected to each other through MOS transistors in the ON state. Therefore, it is possible to suppress a voltage drop due to a parasitic diode of each MOS transistor.

Abstract: A solid-state imaging device includes: a pixel section wherein pixels including photoelectric conversion devices are arranged in a matrix; and a pixel driving section including a row selection circuit which controls the pixels to perform an electronic shutter operation and readout of the pixel section. The row selection circuit has a function of selecting a readout row from which a signal is read out and a shutter row on which reset is performed by discharging charge accumulated in the photoelectric conversion devices, in accordance with address and control signals. The row selection circuit can set, in accordance with the address and control signals, in the pixels of the selected row, at least a readout state, a discharge state where a smaller amount of the charge accumulated in the photoelectric conversion devices than the reset is discharged, an electronic shutter state, and a charge state where the charge is accumulated in the photoelectric conversion devices.

Abstract: A system for driving an electric machine is provided. The system includes a power converter coupled to an input source and the electric machine. The power converter includes a leg that includes a first and second string. The first string includes plurality of controllable semiconductor switches, a first and second connecting node. The first string is operatively coupled across a first and second bus. The second string is operatively coupled to the first string via the first and second connecting node. The second string comprises plurality of switching modules. The switching modules include fully controllable semiconductor switches and energy storage devices. The system further includes a system controller configured to provide activation commands to the controllable semiconductor switches and the switching modules such that energy stored in the energy storage device is provided to the electric machine when the machine is switched on for operation.

Abstract: A multi-mode control device is provided for controlling a load device. A high-power interface of the control device can be electrically coupled to a high-power module for providing current to the load device. An occupancy sensor can receive a first current from the high-power module via the high-power interface, and a trigger detection device can receive a second current that is less than the first current from a low-power module via a low-power interface. The processor can switch the control device from a high-power mode for powering the occupancy sensor to a low-power mode by causing a reduction in the current provided to the occupancy sensor and causing current to be provided to the trigger detection device. The trigger detection device can detect a trigger in the low-power mode. The processor can cause the control device to operate in the high-power mode based on the trigger's detection.

Abstract: An example system may comprise at least one solar panel including a plurality of photovoltaic cells, wherein the photovoltaic cells are grouped into at least a first group of cells and a second group of cells. The first and second groups of cells may be coupled in series to a DC bus to deliver DC voltage and power to the DC bus. The system may further include first power conversion circuitry configured to generate power from the first group of cells and second power conversion circuitry configured to generate power from the second group of cells, and inverter circuitry coupled to the DC bus and configured to generate AC power from the DC bus. The first power conversion circuitry may be configured to automatically adjust at least one of an output voltage or power delivered to the DC bus based on an operating point of the second power conversion circuitry.

Abstract: A temperature controlling system for a battery includes a converter, a DC linker, and an inverter. The converter includes a plurality of converter switches and an inductor. The converter is configured to be coupled to the battery to raise or drop a voltage output of the battery. The DC linker includes a capacitor and is configured to stabilize an output voltage of the converter. The inverter includes a plurality of inverter switches, at least one inductor, and an inductor switch coupled to the at least one inductor. The inverter is configured to invert the output voltage of the converter, wherein the inductor switch and at least one of the inverter switches are configured to form a current path for a current through the at least one inductor to the battery.

Abstract: A wind turbine park (242) connected to a transmission system (234). The wind turbine park includes a component (230) for determining a short circuit ratio and based thereon for determining a parameter adjustment recipe, and a controller (238) for controlling an output of the wind turbine park, the controller (238) executing a control algorithm using a determined parameter adjustment recipe, the determined parameter adjustment recipe responsive to the short circuit ratio and determined within the component (230) or within the controller (238).

Abstract: The present invention discloses a bi-directional switching regulator and a control circuit of the bi-directional switching regulator. The bi-directional switching regulator includes a power stage, an operation circuit, and a power path management circuit. The operation circuit generates a first operation signal to control a boost conversion operation or a buck conversion operation of the power stage. The power path management circuit includes a power path switch electrically connected between the output terminal and the battery, for controlling a charging operation from the output terminal to the battery. The operation circuit generates the first operation signal so that: (1) the output voltage is determined by a sum of a safety offset and the battery voltage; or (2) the output voltage is determined by a higher one between a predetermined voltage level and the sum of the safety offset and the battery voltage.

Abstract: A power management system and method for a noise reducing headset. The power management system adjusts the operations of the noise reducing headset based on the characteristics of the power sources available to the noise reducing headset.

Abstract: A direct feeding apparatus for impedance matching of a wireless power transmission device includes a helical type resonator, and a feeding unit configured to directly feed power to a region having a relatively small current value as compared to a center of a conductive line of the resonator.

Abstract: An inverter circuit contains a first and second DC sources for providing a DC voltage, a common step-up converter for boosting the DC voltage, an intermediate circuit capacitor connected between the outputs of the common step-up converter, and an inverter for converting the DC voltage provided by the capacitor into an AC voltage. The common step-up converter contains a series circuit having a first inductance and a first rectifier element and is connected between an output of the first DC source and one side of the intermediate circuit capacitor as well as a series circuit which includes a second inductance and a second rectifier element and is connected between an output of the second DC source and another side of the intermediate circuit capacitor. The common step-up converter further contains a common switching element which is connected between the first and second DC sources.

Abstract: A programmable logic circuit assigns a value to an outlet of a power distribution unit (PDU) that comprises a power source at an input of the PDU and at least one light-emitting diode (LED) associated with the outlet. The programmable logic circuit sends the value to a program on a hardware device that comprises one or more power supplies. The programmable logic circuit receives information from the program. Subsequently, an illumination state of the LED is modified based on the information.

Abstract: An output converter includes a DCDC conversion section, a secondary side voltage/current monitoring section detecting a power from the DCDC conversion section, a maximum operation point control section determining what voltage is to be set by the DCDC conversion section so that the power detected by the secondary side voltage/current monitoring section is maximum, a DCDC short-circuit switch via which a current from a module bypasses the DCDC conversion section to outside, a primary side voltage/current monitoring section measuring the current from the module, a module short-circuit switch switching between a state where a secondary side cathode and a secondary side anode are short-circuited and a state where they are not short-circuited, the maximum operation point control section causing the DCDC short-circuit switch and the module short-circuit switch to switch.

Abstract: A system includes a first power source and a variable neutral impedance circuit configured to vary a neutral impedance of the first power source based on presence and absence of a parallel coupling of the first power source with a second power source. The variable neutral impedance circuit may be configured to reduce a neutral current of the first power source when the first power source is operating in parallel with the second power source. The variable neutral impedance circuit may include an impedance coupled in series with the first power source, a bypass switch configured to bypass the impedance and a control circuit configured to control the bypass switch. The impedance may include a resistor.

Abstract: An alternating current (AC) to direct current (DC) converter device includes an AC-to-DC converter circuit, a step-down DC converter circuit, a controller, a first standby power converter circuit and a second standby power converter circuit. The AC-to-DC converter circuit is adapted to receive and perform an AC-to-DC conversion on an AC power so as to output a DC bus voltage. The step-down DC converter performs a step-down conversion on the DC bus voltage so as to output a main power voltage. The first standby power converter circuit performs a step-down conversion on the main power voltage so as to output a first standby DC voltage. The second standby power converter circuit performs a step-down conversion on the DC bus voltage to output a second standby DC voltage.

Abstract: In an embodiment, a voltage amplifier is provided. In this voltage amplifier, a DC/DC boost converter converts an input DC voltage to an output DC voltage, which is higher than the input DC voltage. A DC/AC converter connected to the DC/DC boost converter converts the output DC voltage to an AC pulse-train. A voltage multiplier connected to the DC/AC converter converts the AC pulse-train to an amplified output DC voltage that is higher than the AC pulse-train. A discharger connected to the voltage multiplier can discharge the amplified output DC voltage.

Abstract: The disclosure relates to an energy storing device for generating a supply voltage for an electric machine, comprising at least one energy supply branch which is connected in parallel and each of which has a plurality of first and second energy storing modules that are connected in series. The first and second energy storing modules each comprise an energy storing cell module, which has at least one energy storing cell, and a coupling device, which is designed to selectively connect the energy storing cell module into the respective energy supply branch or to bridge said energy storing cell module. Each second energy storing module additionally has a cooling element for the at least one energy storing cell, and the cooling element is designed to cool the at least one energy storing cell dependent on a control signal of a cooling controller.

Abstract: A high voltage power source device includes piezoelectric transformers, each of the piezoelectric transformers being formed with a primary electrode and a secondary electrode on piezoelectric ceramics, receiving a primary voltage at the primary electrode, and generating a second voltage from the secondary electrode, switching elements, each of the switching elements driving a respective one of the piezoelectric transformers, and primary voltage supply devices, each of the primary voltage supply devices supplying the primary voltage to the primary electrode of the respective one of the piezoelectric transformers by driving the respective one of the switching elements when the secondary voltage is generated from the respective one of the second electrodes, wherein the respective one of the primary voltage supply devices supplies the primary voltage to the respective one of the primary electrodes by driving the respective one of the switching elements at the same frequency.

Abstract: A power converter is provided. The power converter includes a converter leg comprising a plurality of active power link modules coupled to each other. Each of the plurality of active power link module includes exactly two semiconductor switches comprising antiparallel diodes and wherein the antiparallel diodes are coupled in parallel to the respective switches, a filter inductor coupled to a node between the two semiconductor switches, a filter capacitor coupled in parallel across the at least two semiconductor switches and a power storage element directly coupled in parallel to the filter capacitor.

Abstract: An energy supply system for supplying electrical energy to a building, comprising a grid connector unit for providing a connection to an external power grid, a load connector unit for connecting to a building power grid, a conductor loop for electrically connecting the grid connector unit to the load connector unit, an energy storage device connected to the conductor loop, and a disconnector placed in the conductor loop for, upon activation of the disconnector, disconnecting the electrical connection between the grid connector unit and the load connector unit, whereby the energy storage device is connected to the conductor loop via a discharging line such that electrical energy stored in the energy storage device may be discharged through part of the conductor loop to the load connector unit when the disconnector is activated.

Abstract: A solar power module, and related method of operation, that protects the bypass diodes in the solar power module from overheating due to partial shading, and also protects firefighters and installer personnel from electrical shock hazard. The solar power module includes active bypass switches, and isolation switches that disconnect the PV cells from the bypass switches when all the bypass switches are closed concurrently, thereby allowing the PV cells to continue supplying power to the control circuitry. The isolation switches are also used to maintain the solar power module in a safe state during installation, or in case of fire.

Abstract: A three phase to single phase automatic transfer switch for providing power to at least one single phase power load from one of a primary and a secondary source of three phase power. The automatic transfer switch includes three pairs of switches, wherein each pair of switches is connectable to the primary and the secondary sources of three phase power, wherein each switch operates in unison with the other switch within its pair, wherein each pair of switches is connectable to a different one of the at least one single phase power load, and wherein each pair of switches is operable independently of the other pairs of switches.