Abstract: The purpose of the present disclosure is to provide a non-aqueous electrolyte rechargeable battery that serves to improve the thermal stability of the lithium composite oxide while keeping degradation in the low-temperature characteristics of the battery under control. A non-aqueous electrolyte rechargeable battery involving one aspect of the present disclosure includes a cathode, an anode, and a non-aqueous electrolyte. The cathode includes a cathode current collector and a cathode laminate disposed on the cathode current collector. The cathode laminate includes a lithium composite oxide (30) composed of secondary particles (34) formed of aggregated primary particles (32). Letting the average particle diameter of the primary particles (32) be d and the standard deviation in the particle-size distribution be ?, among the secondary particles (34) primary particles (32a) having a particle diameter greater than d+6? are present.

Abstract: A power conversion device includes: a power conversion circuit for converting DC power into AC power; and a controller to generate a control signal for the power conversion circuit based on a control command value and an output voltage of the power conversion circuit. The controller is configured to generate the control signal based on a corrected voltage command value calculated by subtraction correction to decrease a voltage command value when the output voltage of the power conversion circuit is equal to or higher than a predetermined threshold value, and to generate the control signal based on a voltage command value not subjected to the subtraction correction when the output voltage of the power conversion circuit is lower than the threshold value.

Abstract: A multiple power conversion system includes a plurality of first to n-th unit power converters. DC positive sides of the plurality of unit power converters are connected to one another, DC negative sides of the plurality of unit power converters are connected to one another, and n is an integer of two or more. The multiple power conversion system further includes a detector to detect a current flowing through the DC positive side or the DC negative side of a corresponding one of (n?1) or more of the plurality of unit power converters. The multiple power conversion system that can detect a circulating current with a smaller number of current sensors.

Abstract: A power system includes an AC power supply, an AC filter circuit, an AC circuit breaker, and a first switch. The AC filter circuit includes an inductor having one end connected in series to an output end of the AC power supply, and a capacitor having one end receiving a voltage at another end of the inductor. The AC circuit breaker exists between the other end of the inductor and an electric power grid. The first switch switches a state between the one end of the capacitor and a wire connecting the other end of the inductor to the AC circuit breaker, between a connected state and a disconnected state. The AC power supply may be a generator and include a generator control unit controlling the generator. The generator control unit may turn off the first switch when the AC power supply operates in a predetermined standby mode.

Abstract: A power conversion system including a plurality of power conversion devices connected in parallel. Each of the plurality of power conversion devices includes: a power conversion circuit configured to convert DC to AC; and an AC filter circuit connected to an output side of the power conversion circuit. The AC filter circuit is an LC low-pass filter including a first filter reactor and an AC filter capacitor connected in an L shape. The AC filter circuit further includes a second filter reactor connected in series to the AC filter capacitor, and a resistance constructing a series circuit together with the AC filter capacitor and the second filter reactor.

Abstract: A multiplex power conversion system enabling preventing a failure from spreading, with a simple configuration. The multiplex power conversion system includes a plurality of unit power converters. In the plurality of unit power converters, respective direct-current positive sides are connected. Respective direct-current negative sides are connected. Respective direct-current neutral points are not short-circuited. For example, the respective direct-current neutral points are not connected. Therefore, a failure in a power converter can be prevented from spreading.

Abstract: A light projecting device may include an LED, an LED power supply, and a drive circuit. The LED emits light in a specific direction. The LED power supply supplies power to the LED. The drive circuit subjects the waveform of the drive current modulated at a specific frequency to DC offset and inputs the result to the LED.

Abstract: A power conditioner includes an inverter circuit that converts a DC voltage into an AC voltage, a voltage dividing circuit having one end connected to the positive electrode input terminal and the other end connected to the negative electrode input terminal, and a ground fault detector configured to receive a voltage divided by the voltage dividing circuit as an input voltage signal and to detect an occurrence of a ground fault based on the magnitude of the voltage of the input voltage signal. the ground fault detector emits an AC ground fault detection signal when the input voltage signal includes a first voltage signal having a frequency equal to or higher than a predetermined first frequency and a deviation of the first voltage signal with respect to an AC ground reference potential is equal to or larger than an AC ground fault detection voltage.

Abstract: A control device for an electric power conversion apparatus, the control device detecting occurrence of an earth fault in a direct-current path in a system in which the direct-current path between a solar cell module and an electric power conversion apparatus is grounded, is provided. The control device for the electric power conversion apparatus includes: a grounding control unit configured to, in a system in which a direct-current path between a solar cell module and an electric power conversion apparatus is grounded via a switch, control a switch; and an earth fault determination unit configured to, when the switch is open under the controlled of the grounding control unit, detect whether or not an earth fault has occurred in the direct-current path.

Abstract: A power conversion device includes: a power conversion circuit for converting DC power into AC power; and a controller to generate a control signal for the power conversion circuit based on a control command value and an output voltage of the power conversion circuit. The controller is configured to generate the control signal based on a corrected voltage command value calculated by subtraction correction to decrease a voltage command value when the output voltage of the power conversion circuit is equal to or higher than a predetermined threshold value, and to generate the control signal based on a voltage command value not subjected to the subtraction correction when the output voltage of the power conversion circuit is lower than the threshold value.

Abstract: A power conditioner includes an inverter circuit that converts a DC voltage into an AC voltage, a voltage dividing circuit having one end connected to the positive electrode input terminal and the other end connected to the negative electrode input terminal, and a ground fault detector configured to receive a voltage divided by the voltage dividing circuit as an input voltage signal and to detect an occurrence of a ground fault based on the magnitude of the voltage of the input voltage signal. the ground fault detector emits an AC ground fault detection signal when the input voltage signal includes a first voltage signal having a frequency equal to or higher than a predetermined first frequency and a deviation of the first voltage signal with respect to an AC ground reference potential is equal to or larger than an AC ground fault detection voltage.

Abstract: An object of the present disclosure is to provide a nonaqueous electrolyte secondary battery that can suppress lowering in capacity due to high-temperature storage of the battery. The nonaqueous electrolyte secondary battery (10) includes: a positive electrode (11) containing one or more positive electrode active materials; a negative electrode (12); and a nonaqueous electrolyte containing a fluorine compound, where: the positive electrode active materials include a complex oxide A containing Li, Ni, and W and a complex oxide B containing Li, Ni, and W as an optional element; W content in the complex oxide A is 5 mol % or more; W content in the complex oxide B is 0.5 mol % or less; and a mass ratio of the complex oxide A is 0.002% or more and 0.1% or less relative to the total of the complex oxide A and the complex oxide B.

Abstract: According to an embodiment of the invention, a power conversion device that includes a power converter, a direct current capacitor, a voltage sensor, a rectifying element, an electromagnetic contactor, and a control circuit is provided. The power converter includes a pair of direct current terminals connected to a direct current power supply, includes multiple alternating current terminals connected to an electric power system of alternating current, converts direct current power input from the direct current power supply into alternating current power, and supplies the alternating current power to the electric power system. The direct current capacitor is connected between the pair of direct current terminals. The voltage sensor detects a voltage value of the direct current capacitor.

Abstract: A power system includes an AC power supply, an AC filter circuit, an AC circuit breaker, and a first switch. The AC filter circuit includes an inductor having one end connected in series to an output end of the AC power supply, and a capacitor having one end receiving a voltage at another end of the inductor. The AC circuit breaker exists between the other end of the inductor and an electric power grid. The first switch switches a state between the one end of the capacitor and a wire connecting the other end of the inductor to the AC circuit breaker, between a connected state and a disconnected state. The AC power supply may be a generator and include a generator control unit controlling the generator. The generator control unit may turn off the first switch when the AC power supply operates in a predetermined standby mode.

Abstract: A control device for an electric power conversion apparatus, the control device detecting occurrence of an earth fault in a direct-current path in a system in which the direct-current path between a solar cell module and an electric power conversion apparatus is grounded, is provided. The control device for the electric power conversion apparatus includes: a grounding control unit configured to, in a system in which a direct-current path between a solar cell module and an electric power conversion apparatus is grounded via a switch, control a switch; and an earth fault determination unit configured to, when the switch is open under the controlled of the grounding control unit, detect whether or not an earth fault has occurred in the direct-current path.

Abstract: A control device for a power conversion device that is capable of detecting current abnormality of the power conversion device with no delay is provided. The control device for the power conversion device includes a current detection unit for outputting an error signal when a detection value of a current sensor for detecting current flowing through the power conversion device is larger than a preset overcurrent determination value, and outputting a state detection value larger than a value corresponding to the error signal based on the error signal, and an abnormality detection unit for accepting an input of the state detection value of the current detection unit via the wiring, and an abnormality detection unit for outputting an error signal when the state detection value of the current detection unit is larger than a preset overcurrent abnormality determination value, and detecting abnormality based on the error signal.

Abstract: According to an embodiment of the invention, a power conversion device that includes a power converter, a direct current capacitor, a voltage sensor, a rectifying element, an electromagnetic contactor, and a control circuit is provided. The power converter includes a pair of direct current terminals connected to a direct current power supply, includes multiple alternating current terminals connected to an electric power system of alternating current, converts direct current power input from the direct current power supply into alternating current power, and supplies the alternating current power to the electric power system. The direct current capacitor is connected between the pair of direct current terminals. The voltage sensor detects a voltage value of the direct current capacitor.

Abstract: This cathode active material for a secondary battery using a non-aqueous electrolyte includes nickel-rich lithium transition-metal oxide, exhibits a hard X-ray photoelectron spectroscopy (HAXPES) peak of 1,560 to 1,565 eV in binding energy from an Al-rich layer, using a photon energy of 6 KeV, and with respect to the mean particle diameter r of the lithium transition-metal oxide particle, the Al concentration is approximately constant within 0.35 r of the center.

Abstract: The present uninterruptible power supply apparatus includes a converter (5) configured to convert AC power into DC power; an inverter (10) configured to convert DC power into AC power and supply the converted AC power to a load (24); and a control device (18) configured to control the converter (5) and the inverter (10). The control device (18) is configured to execute a mode selected from a sinusoidal wave output mode and a waveform distortion generation mode. In the sinusoidal wave output mode, an AC voltage (VO) with a sinusoidal waveform and with no waveform distortion is supplied to the load (24). In the waveform distortion generation mode, an AC voltage (VO) with waveform distortion within an allowable range for the load (24) is supplied to the load (24).

Abstract: A control device for a power conversion device that is capable of detecting current abnormality of the power conversion device with no delay is provided. The control device for the power conversion device includes a current detection unit for outputting an error signal when a detection value of a current sensor for detecting current flowing through the power conversion device is larger than a preset overcurrent determination value, and outputting a state detection value larger than a value corresponding to the error signal based on the error signal, and an abnormality detection unit for accepting an input of the state detection value of the current detection unit via the wiring, and an abnormality detection unit for outputting an error signal when the state detection value of the current detection unit is larger than a preset overcurrent abnormality determination value, and detecting abnormality based on the error signal.