Abstract: A power supply system comprises an alternating-current sweep unit that outputs alternating-current power from a U-phase battery string, a V-phase battery string, and a W-phase battery string that are Y-connected, a first power supply circuit that converts output of a direct-current sweep unit to alternating-current power using an inverter and outputs the alternating-current power, the direct-current sweep unit including a first battery string; and a control device. An energy density of a battery included in the U-phase battery string, the V-phase battery string, and the W-phase battery string is higher than an energy density of a battery included in the first battery string.

Abstract: The present disclosure relates to an uninterruptible power supply (UPS) system and, more specifically, to a static transfer switch (STS) that can be applied to a UPS module, the static transfer switch comprising: one semiconductor rectifying element connected to either the anode terminal or the cathode terminal of a direct current power source; a bypass circuit for connecting the input terminal and the output terminal of the semiconductor rectifying element so as to bypass the semiconductor rectifying element; a breaker for opening or closing the bypass circuit; and a switch including a control unit, which controls the semiconductor rectifying element so as to conduct current when a preset conduction signal is received, controls the breaker so as to close the bypass circuit, and, when the bypass circuit is closed by the breaker, controls the semiconductor rectifying element so as to stop the conduction of current.

Abstract: A photovoltaic system comprising an inverter adapted to convert a DC power supplied by photovoltaic modules of a photovoltaic generator via power cables to said inverter into an AC current for an AC power supply grid, wherein the inverter has a base station connected by means of the power cables to the module level devices which are provided to monitor and/or to control associated photovoltaic modules of the photovoltaic generator, wherein if the inverter does not receive sufficient energy from the photovoltaic generator and the AC power supply grid, a controller is adapted to activate a deadlock prevention mode of an energy supply unit connected to the inverter where the inverter receives energy from the energy supply unit such that the base station of the inverter is able to continue to transmit permission to operate, PTO, signals via the power cables to the module level devices of the photovoltaic generator.

Abstract: In order to specify a method, which is improved in comparison to the prior art, for monitoring an electrical switching arrangement having at least two channels, which each electrically conductively connect an electrical source supplying the respective channel, forming an electrical supply quantity, to an output of the respective channel, the switching arrangement is fed not only an external safety signal, from which an internal safety signal is respectively generated for the at least two channels in order to therewith control a voltage interrupter connected in series in the respective channel, but also a pulsed diagnostic signal, which is superimposed on the internal safety signals in order to alternately open and close again the voltage interrupters connected in the respective channels and to thus respectively alternately interrupt the supply quantities appearing in the respective channels.

Abstract: An active noise source apparatus includes a pair of a first and second switched-biased noise amplifier branches (22, 23). A directional coupler (24) having a pair of input ports (3, 4) connected to combine the noise outputs from the first and second switched-biased noise amplifiers. One output port (4) of the directional coupler (24) is connected to a matched termination (Rtermination) and another output port (2) of the directional coupler (24) is connected to an output (25) of the active noise source.

Abstract: Technologies for a high-voltage transmission gate are disclosed. In the illustrative embodiment, a companion chip is connected to a quantum processor. The companion chip provides voltages to gates of qubits on the quantum processor. The companion chip includes one or more high-voltage transmission gates that can be used to charge capacitors linked to gates of qubits on the quantum processor. The transmission gate includes transistors with a breakdown voltage less than a range of input and output voltages of the transmission gate. Control circuitry on the companion chip controls the voltages applied to transistors of the transmission gate to ensure that the voltage differences across the terminals of each transistor is below a breakdown voltage.

Abstract: Trimming components within an oscillator comprising: a trim-capable current source, wherein the trim-capable current source comprises a trimmable resistor and a trimmable current component, a comparator comprising a first input terminal that couples to the trim-capable current source and the second input terminal that couples to a reference voltage source, a switch coupled to the first input terminal and the trim-capable current source, and a trim-capable capacitor coupled to the switch, wherein the switch is coupled between the trim-capable capacitor and the trim-capable current source.

Abstract: The present disclosure provide a device, method and storage medium for frequency calibration for voltage-controlled oscillators. The device includes: A frequency divider connected with a VCO, a time-digital converter connected with the frequency divider, a logic controller connected with the time-digital converter, a digital-to-analog converter connected with the voltage-controlled oscillator; The frequency divider is used to divide the signal generated by the voltage-controlled oscillator into N times to get the frequency divider signal; Time-digital converter is used to measure the actual time period of frequency division signal; And the logic controller is used to generate the control voltage according to the difference between the actual time period of the frequency division signal and the calibration period of the frequency division signal, and adjust the frequency of the VCO according to the control voltage.

Abstract: To improve the optical power supply efficiency, a power-over-fiber system includes a power sourcing equipment including a semiconductor laser that oscillates with electric power to output feed light, a powered device including a photoelectric conversion element that converts the feed light into electric power, a plurality of optical fiber cables that transmit the feed light, a measurer that measures a distance from the power sourcing equipment to the powered device, and a control device that controls the power sourcing equipment to output the feed light after compensating for an amount of attenuation of the feed light according to a transmission distance on the basis of the distance from the power sourcing equipment to the powered device measured by the measurer.

Abstract: A power supply system includes an alternating current sweep unit and a first power supply circuit, and each of a U-phase battery string, a V-phase battery string, a W-phase battery string, and a first battery string includes a plurality of battery circuit modules connected in series, and each of the battery circuit modules includes a battery, output terminals, a first switch, and a second switch.

Abstract: A control apparatus is described for controlling a frequency set-point for a first AC network electrically connected to a first HVDC station to regulate active power. The controller has a frequency controller operable in a first mode of operation to determine a frequency set-point for the first AC network based on a measured DC voltage at the first HVDC station. A disturbance detector is configured to monitor the measured value of DC voltage at the first HVDC station for a predetermined characteristic indicative that a variation in measured DC voltage does correspond to a known modulation applied to the DC voltage by a second HVDC station. The frequency controller is configured to determine the frequency set-point for the first AC network based on a measured value of DC voltage if said predetermined characteristic is detected, and to control the frequency set-point to a predetermined default frequency if not detected.

Abstract: A field-effect transistor (FET) based synchronous rectifier for emulating a diode, comprising: a first terminal (20) and a second terminal (30); a first FET (M1) and a second FET (M2), wherein the second FET (M2) is adapted to control operation of the first FET (M1) to thereby allow unidirectional current flow when the two terminals (20, 30) are connected with an external circuit; and wherein the FET based synchronous rectifier comprises a fully integrated single-chip device (10) adapted to emulate a diode.

Abstract: An apparatus and a method using no switching elements for multiplexing and reading arrays of sensors whose electrical resistance is modulated by the signals to be measured are proposed. Sensor elements are arranged in groups and columns where each column is fed with a continuous voltage waveform of different amplitude, frequency and phase characteristics which then produce current signals that are modulated by the variable resistance signals to be measured. Modulated currents are summed row-wise and collected at the read-out circuits, either by applying a constant voltage to each row of the array or by connecting a capacitor and converting these current summations into output voltage signals. The read-out circuits de-multiplex each individual sensor signal to be measured by lock-in demodulation according to the frequencies and phases employed for the stimulation of each column.

Abstract: In a power supply system, a control device is configured to select one or more target batteries that are to perform requested energy management from a plurality of batteries included in an alternating-current battery string and a direct-current battery string, and perform the requested energy management using the one or more target batteries with the batteries other than the one or more target batteries being disconnected from a circuit.

Abstract: In an uninterruptible power supply apparatus, AC current, which includes a feedback component having a value corresponding to deviation between terminal-to-terminal voltage of a capacitor and reference voltage, and a feed forward component obtained by multiplying load current by a gain, is passed into a converter such that the terminal-to-terminal voltage of the capacitor becomes the reference voltage. The gain is set to a first gain in an inverter power feed mode and a bypass power feed mode, and the gain is set to a second gain smaller than the first gain in a switching period of switching between the inverter power feed mode and the bypass power feed mode, to prevent the terminal-to-terminal voltage of the capacitor from exceeding an upper limit voltage in a lap power feed mode.

Abstract: The present disclosure relates to a power module with a power path extending through a first field-effect transistor (FET) and a second FET. A primary conductive structure connecting the first FET and the second FET in series provides a primary parasitic inductor within the power path. A first secondary conductive structure connected to both a gate and a source of the first FET provides a first secondary parasitic inductor within a first gate path, and a second secondary conductive structure connected to both a gate and a source of the second FET provides a second secondary parasitic inductor within a second gate path. The first secondary conductive structure and the second secondary conductive structure are configured such that mutual coupling between the first secondary parasitic inductor and the primary parasitic inductor and mutual coupling between the second secondary parasitic inductor and the primary parasitic inductor are substantially symmetrical.

Abstract: Pre-conditioning circuitry for pre-conditioning a node of a circuit to support a change in operation of the circuit, wherein the circuit is operative to change a state of the node to effect the change in operation of the circuit, and wherein the pre-conditioning circuitry is configured to apply a voltage, current or charge directly to the node to reduce the magnitude of the change to the state of the node required by the circuit to achieve the change in operation of the circuit.

Abstract: A system for distributing DC bus voltage and control power to multiple motors includes a rectifier front end supplying a DC bus voltage and a DC control voltage. Both the DC bus voltage and the DC control voltage are distributed via a common set of conductors. Diodes are operatively connected between the DC control voltage and the common set of conductors. The diodes allow forward conduction of the DC control voltage and distribution of control power to distributed devices when the DC bus voltage is not present. Once the DC bus voltage is present, the diodes block conduction of the DC control voltage. Each of the distributed devices are configured with an internal power supply that is operative to generate an internal control voltage from either the DC control voltage or the DC bus voltage.

Abstract: An electronic component is switched under the control of a pulse-width modulation signal. The electronic component outputs an output signal that is controlled by a control signal. The switching on or off is initiated within a pulse-width modulation cycle period at a level change time by a change of the pulse-width modulation signal. The control signal is set within each PWM cycle period to a first control value between the level change time and a first switching time, to a second control value between the first switching time and a second switching time, and to a third control value from the second switching time until a final gate-voltage value is reached on the gate of the electronic component. Each switching time of a PWM period is determined in dependence on an amplitude value determined during a preceding PWM cycle period, to limit amplitudes of the oscillation of the output signal.

Abstract: Method for measuring an operating temperature of a power module (10) that is used for operating an electric vehicle drive, the power module (10) comprising a plurality of semiconductor switching elements (14) and drive electronics (16), wherein the semiconductor switching elements (14) can be switched by the drive electronics (16) in such a way that the semiconductor switching elements (14) allow or interrupt a drain-source current in order to convert the direct current fed into the power module (10) at the input side into an output-side alternating current, wherein the method comprises measurement of a voltage present at a point located on a side of a diode (22) that is connected in series with the semiconductor switching element (14) and that faces away from the semiconductor switching element (14), wherein the method comprises measurement of a drain-source current of the semiconductor switching element (14) that is generated by a current source (18), wherein the method comprises determination of a mathemat