Denso

A power conversion system (1) configured to supply direct current power to an electrolysis device (2) includes: a power conversion device (3) that converts source power into direct current power; a positive-side wiring (5) and a negative-side wiring (50) that connect the power conversion device (3) and the electrolysis device (2) to each other; a filter capacitor (12) connected between the positive-side wiring (5) and the negative-side wiring (50); a relay (52) provided on at least one of the positive-side wiring (5) and the negative-side wiring (50) on the electrolysis device (2) side of the filter capacitor (12); a first voltage detection device (131); a second voltage detection device (132); and a control device (4). The control device (4) is configured to control the power conversion device (3) so that a first voltage (V1) detected by the first voltage detection device (131) is greater than or equal to a second voltage (V2) detected by the second voltage detection device (132), when connecting the relay (52).

A power conversion system includes a power conversion device and a controller. The power conversion device includes a three-phase full-bridge circuit to which DC power is input and which has three legs connected in parallel between a high-potential line and a low-potential line. In one or two phases of the three-phase full-bridge circuit, a midpoint of the corresponding leg is connected to a power supply wiring for a load via a reactor. The controller includes a first controller working to control a switching operation of the power conversion device by receiving, as inputs, a pseudo torque command signal based on an output command signal for the load and a phase angle signal based on a detection signal indicative of supplied electric power, and a second controller working to generate and output the pseudo torque command signal and the phase angle signal to the first controller. This enables the power conversion system to be capable of supplying electric power in accordance with an output request without changing software, even when an existing power conversion device is repurposed.

A hydrogen production system (1) of the present disclosure includes a plurality of electrolyzers (2) which produce hydrogen by electrolyzing a raw material, a plurality of power converters (3) which convert three-phase AC power into DC power and supply the DC power to the plurality of electrolyzers, and a control device (4) which controls the plurality of power converters. Each electrolyzer is connected to a different one of the power converters. The control device is configured to individually control a current or a voltage supplied from the plurality of power converters to each electrolyzer by individually controlling the plurality of power converters. The control device is configured to control the current or the voltage supplied from the power converter to a measured electrolyzer (2S) based on a detection value detected by at least one detection unit of an inlet gas state detection unit (141), an outlet gas state detection unit (142), and a power supply physical quantity detection unit (143).

A hydrogen production system 1 of the present disclosure includes an electrolytic device 2, a plurality of electrical power conversion devices 3 that convert three-phase AC power to DC power and supply the DC power to the electrolytic device 2, and a control device 4 that controls the electrical power conversion devices. The electrolytic device 2 is connected with the plurality of electrical power conversion devices 3 connected in parallel with each other. The control device 4 is configured to correct, when electrical power supply from some of the plurality of electrical power conversion devices 3 to the electrolytic device 2 is stopped, at least one of voltage and current of the electrical power conversion device 3 that is continuing electrical power supply to the electrolytic device 2 so that a later hydrogen production amount of the electrolytic device 2 approaches a predetermined target amount.

A position detection device includes a substrate (100) arranged facing a detection body (30), a transmitting coil (110) formed on the substrate, a first receiving coil (120) and a second receiving coil (130) arranged inside the transmitting coil in a normal direction, and a plate-shaped accommodation portion (500) that accommodates the substrate and has a plate thickness direction in the normal direction. The accommodation portion has an arrangement part (511) in which the substrate is arranged and a mounting part (512) for mounting the accommodation part. The accommodation portion has a connecting part (513) that connects the mounting part and the arrangement part. The connecting part has at least one of two structures: a structure in which a size in the first direction is smaller than that of the arrangement part, and a structure in which a size in the third direction is smaller than that of the arrangement part. The arrangement part has a rigid portion (600, 610, 620, 630, 631, 632, 633, 634, 635, 636, 637) that is formed to be larger in size in the plate thickness direction than other portions of the arrangement part.

A semiconductor device (1) includes a semiconductor module (4), a component-embedded substrate (3), a support substrate (2) on which these components are mounted, and a wiring layer (7). The component-embedded substrate includes an electronic component (31, 32). The component-embedded substrate has a height equal to a height of the semiconductor module, and the electronic component has a height different from the height of the semiconductor module. The wiring layer includes wiring sections (72) each electrically connected to the power semiconductor element or the electronic component. The wiring layer is disposed on an opposite side of the semiconductor module and the component-embedded substrate from the support substrate. The electronic component has a terminal (311, 312) connected to a corresponding wiring section among the wiring sections. The terminal is positioned closer to the wiring layer than to the support substrate.

A recognition device (201, 202) includes a feature region detection unit (21) and a representative point extraction unit (23). The feature region detection unit detects at least three feature regions (62) of a target from image data (67). The representative point extraction unit calculates at least three extracted representative points from the at least three feature regions, and extracts label information (68) identifying the at least three extracted representative points. The position estimation unit estimates a position of the target based on the at least three extracted representative points and at least three reference representative points which have a predefined correct positional relationship with each other and have reference label information identifying each of the at least three reference representative points.

A manufacturing method of a solid electrolyte of a pyrochlore-type that includes a plurality of cations including a metal cation, a halogen element, and a defect structure, includes a mixing process (S16) that includes preparing a mixed raw material by mixing a precursor of the solid electrolyte or raw materials for the precursor with a halogen-containing raw material containing the halogen element, and a firing process (S17) that includes firing the mixed raw material. The firing process includes volatilizing the halogen element from the solid electrolyte at a halogen volatilization rate Vout and supplying the halogen element to a firing atmosphere of the solid electrolyte at a halogen supply rate Vin. The firing process includes firing the mixed raw material under an atmosphere in which a relationship of Vin/(Vout × Dp) ≥ 0.015 is satisfied, where Dp is a median particle diameter of the solid electrolyte.

A position detection device includes a substrate (100) disposed to face a displaceable detection object, a transmitting coil (110) provided in the substrate (100), a first receiving coil (120) and a second receiving coil (130) which are disposed inside the transmitting coil (110) in a normal direction with respect to a surface direction of the substrate (100), and a signal processing unit (210) that derives a displacement amount of the detection object (30) in view of a gap between the detection object and the substrate (100), based on a first characteristic value of the first receiving coil (120) and a second characteristic value of the second receiving coil (130).

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