Abstract: A power transmitting apparatus, a power receiving apparatus, and methods thereof are provided, which can make a certain amount of power, that is set by the transmitting apparatus or the receiving apparatus, be transmitted and received in transmitting and receiving the power by wire or wirelessly between the apparatuses. The power transmitting apparatus includes a power transmitting unit configured to transmit power of a provided battery to a power receiving apparatus; a confirmation unit configured to confirm at least one of a residual amount of the battery, a transmitted amount of the power, an amount of power that is received by the power receiving apparatus, a charge amount of the power receiving apparatus, and an accumulated time for which the power is being transmitted; and a control unit configured to control transmission of the power through comparison of the result of the confirmation with a predetermined threshold value.

Abstract: Different systems to achieve solar power conversion are provided in at least three different general aspects, with circuitry that can be used to harvest maximum power from a solar source or strings of panels for DC or AC use, perhaps for transfer to a power grid three aspects can exist perhaps independently and relate to: 1) electrical power conversion in a multimodal manner, 2) alternating between differing processes such as by an alternative mode photovoltaic power converter functionality control, and 3) systems that can achieve efficiencies in conversion that are extraordinarily high compared to traditional through substantially power isomorphic photovoltaic DC-DC power conversion capability that can achieve 99.2% efficiency or even only wire transmission losses. Switchmode impedance conversion circuits may have pairs of photovoltaic power series switch elements and pairs of photovoltaic power shunt switch elements.

Abstract: Disclosed are various embodiments of power source redundancy in a power supply for a rack mounted computing device. The power supply includes a plurality of AC power converters configured to receive power from corresponding power sources. A first AC power converter provides DC power to a common DC bus of the power supply. A second AC power converter provides DC power to the common DC bus in response to a change in the voltage level provided by the first AC power converter.

Abstract: A charging unit comprises a first input connectable to a first power source, a second input connectable to a second power source, and an output for connection to a battery to be charged. The charging unit also comprises a power supply unit operable simultaneously to provide power from the first input and power from the second input to the output.

Abstract: A control unit of a system stabilization device uses a fluctuation detection block (60) to determine fluctuation components included in the active component and reactive component currents of a system current and fluctuation components included in the frequency signal and the amplitude signal of a system voltage. The high frequency cut-off of the fluctuation detection block (60) is set to be f1; the low frequency cut-off is set to be f2. The fluctuation detection block (60) is composed of a low-pass filter (61) with a time constant of T1, a low-pass filter (62) with a time constant of T2, a subtracter (63) which outputs the difference, between the output signals of the filter (61) and the filter (62), and a feedback circuit (64) which provides feedback on the output of the subtracter (63) to the filters (61, 62). Thus, stability is ensured without using a current detector.

Abstract: A monitoring system and method for monitoring performance of individual powers sources in a distributed power source system. A monitoring module is coupled to each of the power sources, or to each string of serially connected power sources, to monitor and collect data regarding current, voltage, temperature and other environmental factors at the power source. The collected data is transmitted over a power line to a central analysis station for analysis. Data collected from each source indicates malfunction or degradation at the source. Comparison of data collected from adjacent sources filters for environmental factors impacting neighboring sources such as cloudy days for a solar panel. Comparison of data collected from the same source at different times indicates soiling or degradation of the source with time or periodic events such as a moving shade from an adjacent building.

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

Abstract: A semiconductor IC device capable of power-sharing includes a first power line configured to be supplied with a first power, a second power line configured to be supplied with a second power, a switching block configured to connect the first power line with the second power line in response to a first control signal, and a power-sharing control block configured to generate the control signal in accordance with a plurality of operation command signals.

Abstract: A circuit and method are provided for interrupting current flow into a voltage regulator from an output thereof when a voltage source (Vpwr) drops below an output voltage (Vout). In one embodiment, the circuit comprises: (i) a comparator supplied by Vout including an output and inputs coupled to Vpwr and Vout; and (ii) transistors coupled to and controlled by the comparator, including a first transistor configured to interrupt a first current path extending between Vout and Vpwr through an output-leg of the regulator when Vpwr drops below Vout. Preferably, the regulator includes a reference-leg and a feedback-circuit coupling Vout thereto, and the first transistor also interrupts a second current path between Vout and Vpwr through the feedback-circuit and reference leg. More preferably, the reference-leg comprises resistors through which it is coupled to ground, and the transistors include a second transistor to interrupt a third current path between Vout and ground.

Abstract: A battery charging circuit sets charging current according to either the capacity of the battery under charge or a constraint of the charging source, depending on the properties of the charging source. The battery charging circuit sets termination current, however, according to the capacity of the battery under charge, regardless of the properties of the charging source. For example, the termination current may be set as a fixed fraction of the recommended C rate of the battery even if the charging current supplied by the charging source is below this C rate. Always setting the termination current in proportion to the battery's capacity permits detection of the current at which charging should terminate even when the charging current is constrained by the charging source and no longer depends on the battery's capacity.

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

Abstract: The present invention provides a central current share coordinator for use with remotely and non-remotely controllable rectifiers coupled to an output bus. In one embodiment, the central current share coordinator includes a rectifier current resolver configured to determine an existing current share condition for the remotely and non-remotely controllable rectifiers. Additionally, the central current share coordinator also includes a load share adjuster coupled to the rectifier current resolver and configured to adjust an output current of the remotely controllable rectifiers toward a target current share distribution on the output bus.

Abstract: A portable battery powered appliance accepts at least first and second batteries. The appliance also includes a load. a first circuit. and a second circuit. The first circuit receives power from the first battery and provides a first power. The second circuit receives power from the second battery and provides a second power. The load receives at least one of the first power and the second power.

Abstract: A circuit arrangement, to which the vehicle electric system supply voltage is applied and which for briefly maintaining at least one internal normal d.c. voltage in the event of failure of the vehicle electric system supply voltage, includes a reserve energy accumulator, to which a charging voltage higher than the at least one internal normal d.c. voltage is applied in regular operation, and which, in the event of failure of the vehicle electric system supply voltage, delivers a reserve voltage with which operation of at least some electronic circuits may be maintained for a limited period of time, and it includes at least one step-down regulator which steps down the applied input direct voltage to the at least one internal normal d.c. voltage.

Abstract: Previously in a bus system, voltage signals were transmitted from the central unit to the modules, which could reply thereto by variation of the current input. A disadvantage thereby is the relatively high susceptibility to interference of the current input, which itself already must be kept relatively small due to the energy consumption, as well as the correspondingly high effort and expense for an error-free recognition of the signals transmitted from the modules in the central unit. It is now suggested, that the modules also answer to the central unit by means of voltage signals superposed on the direct supply voltage, whereby for the time duration of the signal transmission by the modules, the central unit provides the direct supply voltage to the bus line over a resistor, so that the voltage signal of the module can be detected in the central unit on the bus line on the side of the resistor facing away from the direct supply voltage.

Abstract: A semiconductor integrated circuit according to the present invention comprises a synchronous SRAM, a signal generation circuit generating a chip selection signal, a clock signal etc. supplied to the synchronous SRAM, a voltage set circuit setting the voltage of a system power supply line and a controller controlling the signal generation circuit and the voltage set circuit. When setting the synchronous SRAM in a power down mode, the chip selection signal is set in a nonselective state and the power supply voltage of the system power supply line is stepped down to a standby potential. Thus, the synchronous SRAM enters a standby state having extremely low power consumption.

Abstract: A drive assembly comprises a DC electric motor and an integrated charger/controller/regenerator which includes a power module, a step-up module and a control circuit. The input of the power module is connected to an electric power source during charging, and to the DC motor during regenerative braking. The input of the step-up module is connected to the power module, and the output is connected to the battery. The control circuit includes a switch, and has three modes of operation: driving, regenerative braking and charging. During driving, the switch connects the battery to the power module input and the power module output to the DC motor. During regenerative braking, the switch connects the DC motor to the power module input and the power module output to the step-up module input, and the step-up module output charges the battery. During charging, the switch connects the power module output to the step-up module input, and the step-up module output charges the battery.

Abstract: A 3-phase converter apparatus, in which a 3-phase A.C. power supply and a 3-phase converter operate in parallel on a common load BUS so as to share the load power, has an output voltage command generating device for generating an instantaneous command of the output voltage from the converter, and instantaneous voltage control device for controlling the converter so as to reduce the deviation of the instantaneous value of the output voltage of the converter from the instantaneous command generated by the output voltage command generating device. The converter includes at least one semiconductor switch for effecting a plurality of switching cycles in a half cycle of the A.C. power, so that the control of the phase of the output voltage of the converter with respect to the A.C. power supply is started at any moment.

Abstract: A circulating load apparatus for loading a power supply. The power supply has a power input terminal, a power output terminal and a power return terminal. The power supply provides an output voltage at the power output terminal with respect to the power return terminal. The output voltage of the power supply is controlled to be substantially identical in amplitude to the network voltage of a network source, provided at a network source terminal with respect to a source return terminal. The power supply, power return terminal is coupled to the network source, source return terminal. The power supply power input terminal is coupled to the network source terminal to be powered by voltage and current from the network source terminal. The circulating load apparatus has a voltage source for supplying a voltage between a first and second terminal. The voltage source is connected in series between the network source terminal and the power supply power output terminal.

Abstract: A method for sensing real load unbalance in an electrical power system having at least two clock based power sources which are connected for parallel operation combines a real load difference current signal, proportional to the difference in real load currents in corresponding phases of the power sources, with a phase angle signal which is proportional to the phase difference between an external clock signal and an internal clock signal of one of the power sources, to produce an error signal. When this error signal exceeds a predetermined threshold level, a trip signal is produced to indicate that an excessive real load unbalance situation exists.

Abstract: A dual fueled thermoelectric generator wherein two different sources of energy are provided. The first source of energy is electrical energy which is tapped from an overhead transmission ground wire and converted into thermal energy by electric resistance heaters. The thermal energy produced is applied to a thermopile which converts it into DC electric energy. The second source is a fossil fuel which is converted into thermal energy when a burner is actuated. The thermal energy produced thereby is applied to a thermopile. The burner is actuated in response to either a loss of input voltage from the transmission ground wire or loss of output power from the thermopile. The fossil fuel is preferably propane and the output of the thermopile may be supplied to distributed loads, such as distributed fiber optic repeaters.

Abstract: Three distinct visual indications, one audible indication, and preferably one timing output voltage are provided which are individually activated depending upon when the sound levels falls within a predetermined level. This monitor aids both students and supervisors in establishing consistent and fair noise standards. Variable controls are provided to allow the supervisor to determine the sound level at which the visual indications and audible indication and timing output voltage will automatically be activated. A filter network is included that attenuates non-voice frequencies as well as short, non-repetitive sounds.

Abstract: There is disclosed a solar cell power supply device including a first and a second solar cells. The first cell has a determined spectral sensitivity characteristic and the second cell has a different spectral sensitivity characteristic and connected parallel to the first solar cell. A voltage regulating circuit is provided for stabilizing the output voltages from the first and second solar cells and supplying thus stabilized voltage to a load.

Abstract: This circuit comprises at least one power supply inserted between the earth and each of the two wires of the connection, two RC series dipoles in each case inserted between the earth and the two wires and a circuit able to fix to the earth the average potential of these wires.Application to telephony and the supply of sensors.

Abstract: A multi-purpose battery charger is disclosed, capable of simultaneously charging multiple batteries to a common peak voltage and operable from either an A.C. source of power or a D.C. source of power. The power supply portion of the battery charger includes means for causing the D.C. power source to be used as the primary source for charging if the power supply is connected to both an A.C. and a D.C. power source simultaneously. Means are also included for preventing interaction between the sources of power or damage to the charger if such simultaneous connection is made. The battery charger includes voltage regulator means for maintaining a maximum charging rate to all batteries connected to the charger at one time for as long as any one battery is in a discharged state and for reducing the charging current to all the batteries to a low maintenance charging rate when all the batteries are charged. Individual batteries being charged are protected against both overcharging and interaction between batteries.

Abstract: Disclosed is a ringing power supply for developing a ringing signal having an AC voltage combined with a regulated DC voltage, of magnitude smaller than the magnitude of the AC voltage, from a source having the AC signal combined with an unregulated DC voltage. The ringing power supply comprises a control circuit responsive to the AC and DC voltages of the source for developing a replica signal of the regulated DC voltage with its superimposed AC voltage, and a regulator responsive to the developed replica signal and to the source for providing the desired ringing signal.

Abstract: An electrical circuit providing for equal power consumption by the included oad elements when selectively energized by independent power sources of differing voltages, through control of the path of current flow through the load elements by rectifiers, the rectifiers being disposed to permit current flow in a direction through the load elements in series when a high voltage source energizes the circuit through one pair of terminals and, without alteration of the circuit, in parallel through the load elements when a low voltage source energizes the circuit through another pair of terminals.