Abstract: A power supply system for moving body, includes, a power generation unit, a power storage unit, a converter provided between the power generation unit and the power storage unit, the converter including a power storage unit-side converter terminal and a power generation unit-side converter terminal, an external connection terminal configured to electrically connect to an external device, a first switching unit configured to switch between connected and disconnected of the external connection terminal, the power storage unit, and the power storage unit-side converter terminal, a second switching unit configured to switch between connected and disconnected of the power generation unit-side converter terminal and the external connection terminal, a third switching unit configured to switch between connected and disconnected of the power generation unit-side converter terminal and the power generation unit, and a control device configured to control the first switching unit, the second switching unit, and the thi

Abstract: A control device for a power conversion device using a multi-phase magnetic coupling reactor is provided. The multi-phase magnetic coupling reactor including: a first outer coil; a second outer coil; an inner coil; and a core. Directions of magnetic fluxes generated in the first outer coil, the second outer coil, and the inner coil are opposite to each other in any combination. The control device is configured to switch among a one-phase operation, a two-phase operation, and a three-phase operation. The control device is configured to select two phases of the first outer coil and the second outer coil in the two-phase operation, and the control device is configured to select one of the first outer coil and the second outer coil in the one-phase operation before the two-phase operation or a one-phase operation after the two-phase operation.

Abstract: An inner core portion includes an inner gap having a length in the first direction larger than that of the outer gap in a center in the first direction. A control device is configured to switch between a one-phase operation of causing a current to flow through any one of the first outer coil, the second outer coil, and the inner coil to operate, a two-phase operation of causing a current to flow through any two of the first outer coil, the second outer coil, and the inner coil to operate, and a three-phase operation of causing a current to flow through all of the first outer coil, the second outer coil, and the inner coil to operate. The control device selects the inner coil in the one-phase operation.

Abstract: An electric power supply device supplies electric power to a work machine having an electric power source. The electric power supply device includes a fuel cell different from the electric power source and an electric power connecting section for transferring electric power between the electric power source and the electric power supply device. A control device for controlling the electric power supply device includes a rated capability obtaining section for obtaining the information indicating the rated value of the charge and discharge capability of the electric power source of the work machine in response to the electric power supply device being mounted in the work machine or the electric power supply device being able to utilize the electric power of the electric power source, and an operating condition determining section for determining the operating condition of the electric power supply device based on the rated value.

Abstract: A ground fault determination system includes an acquisition unit that acquires the degree of deterioration of a plurality of fuel cell stacks connected in parallel with each other and connected to an inverter, a ground fault detection unit that detects insulation resistance between the inverter and the plurality of fuel cell stacks, a first determination unit that determines, when the deterioration of each fuel cell stack has not yet progressed, whether there is a ground fault with all the fuel cell stacks all at once, and a second determination unit that determines in turn, when the deterioration of at least one fuel cell stack has progressed, whether there is a ground fault with each fuel cell stack.

Abstract: A control device, for a power conversion device using a three-phase magnetic coupling reactor, includes: a first outer coil; a second outer coil; an inner coil disposed between the first outer coil and the second outer coil; and a core including a first outer core portion around which the first outer coil is wound, a second outer core portion around which the second outer coil is wound, and an inner core portion around which the inner coil is wound. Directions of magnetic fluxes generated in the first outer coil, the second outer coil, and the inner coil are opposite to each other in any combination. In a three-phase operation, the control device controls a value of the current flowing through the inner coil so as to approach values of the currents flowing through the first outer coil and the second outer coil.

Abstract: Provided is an external power feeder and an external power supply system that make it possible to continuously supply power to an external load even at a location without an electrical facility. An external power feeder connectable to a plurality of power supply sources includes: a plurality of connection ports which are respectively in connection with the plurality of power supply sources; a connection state acquisition unit that acquires a connection state of each of the plurality of connection ports with the power supply source; a power supply state acquisition unit that acquires a power supply state from each of the plurality of power supply sources; and a switching unit that switches from power supply from one power supply source to power supply from one other power supply source, among the connected power supply sources, based on a power supply state of the one power supply source.

Abstract: A power feed control system includes: a first drive unit configured to include a first electrically driven device, a first inverter, a first fuel battery system, and a first voltage converter; a second drive unit configured to include a second electrically driven device, a second inverter, a second fuel battery system, and a second voltage converter; a common battery; and a control unit configured to perform control of the first inverter or/and the first voltage converter such that each current value of the first inverter and the first fuel battery system achieves a target value of a first current value that is determined on the basis of the first current value flowing between the first drive unit and the battery and a second current value flowing between the second drive unit and the battery and perform control of the second inverter or/and the second voltage converter such that each current value of the second inverter and the second fuel battery system achieves a target value of the second current value th

Abstract: A fuel cell system that can improve an operating efficiency while minimizing an increase in cost for a configuration is provided. A fuel cell system (10) includes a fuel cell stack (11), an air pump (13), and an electric power control unit (15). The air pump (13) is connected to an output terminal of the fuel cell stack (11). The air pump (13) is configured to supply air as an oxidizing agent gas to the fuel cell stack (11). The electric power control unit (15) includes a first circuit unit (31) and a second circuit unit (32). The first circuit unit (31) is connected to the output terminal of the fuel cell stack (11) and is configured to perform step-up electric power conversion on an input from the fuel cell stack (11). The second circuit unit (32) is configured to perform bidirectional electric power conversion for stepping-up an input from the fuel cell stack (11) and for stepping-down an output to the air pump (13).

Abstract: A fuel cell power system includes a plurality of fuel cell systems that include a fuel cell stack and a fuel tank for storing fuel gas and supplying the fuel gas to the fuel cell stack. The fuel cell power system includes an auxiliary machine that is connected to be electrically switchable to any of the plurality of fuel cell system, and consume electric power output from the plurality of fuel cell systems. The fuel cell power system includes a control device that switches the fuel cell system to which the auxiliary machine is connected, on the basis of the states of the plurality of the fuel cell systems.

Abstract: To continuously supply power at a remote location by repeatedly receiving power from a power supply mobile body when supplying power at a remote location away from the charging infrastructure. A server in communication with an external power feeder that feeds power to an external load, and a power supply mobile body that has power for supplying to the external power feeder, is configured to: receive a charging request to the external power feeder; acquire a power supply condition in the power supply mobile body including an amount of power that the power supply mobile body can supply to the external power feeder; select a power supply mobile body based on the charging request and the power supply condition; and set a power receiving/supplying schedule based on a required amount of power included in the charging request and the amount of power that the power supply mobile body can supply.

Abstract: Provided is an external power feeder and an external power supply system that make it possible to continuously supply power to an external load even at a location without an electrical facility. An external power feeder connectable to a plurality of power supply sources includes: a plurality of connection ports which are respectively in connection with the plurality of power supply sources; a connection state acquisition unit that acquires a connection state of each of the plurality of connection ports with the power supply source; a power supply state acquisition unit that acquires a power supply state from each of the plurality of power supply sources; and a switching unit that switches from power supply from one power supply source to power supply from one other power supply source, among the connected power supply sources, based on a power supply state of the one power supply source.

Abstract: A control device, for a power conversion device using a three-phase magnetic coupling reactor, includes: a first outer coil; a second outer coil; an inner coil disposed between the first outer coil and the second outer coil; and a core including a first outer core portion around which the first outer coil is wound, a second outer core portion around which the second outer coil is wound, and an inner core portion around which the inner coil is wound. Directions of magnetic fluxes generated in the first outer coil, the second outer coil, and the inner coil are opposite to each other in any combination. In a three-phase operation, the control device controls a value of the current flowing through the inner coil so as to approach values of the currents flowing through the first outer coil and the second outer coil.

Abstract: A control device for a power conversion device using a multi-phase magnetic coupling reactor is provided. The multi-phase magnetic coupling reactor including: a first outer coil; a second outer coil; an inner coil; and a core. Directions of magnetic fluxes generated in the first outer coil, the second outer coil, and the inner coil are opposite to each other in any combination. The control device is configured to switch among a one-phase operation, a two-phase operation, and a three-phase operation. The control device is configured to select two phases of the first outer coil and the second outer coil in the two-phase operation, and the control device is configured to select one of the first outer coil and the second outer coil in the one-phase operation before the two-phase operation or a one-phase operation after the two-phase operation.

Abstract: A power conversion device includes a plurality of conversion units electrically connected in parallel to each other and configured to perform voltage conversion of electric power supplied from a power supply and a control device configured to set a conversion unit that will operate within the plurality of conversion units, wherein, after the number of conversion units that are operating within the plurality of conversion units is increased, the control device makes an electric current flowing through an operation start conversion unit which is a conversion unit that has started to operate from a non-operating state larger than an electric current flowing through an operation maintenance conversion unit which is a conversion unit that continues to operate before and after the number of operating conversion units is increased.

Abstract: A fuel cell system that can improve an operating efficiency while minimizing an increase in cost for a configuration is provided. A fuel cell system (10) includes a fuel cell stack (11), an air pump (13), and an electric power control unit (15). The air pump (13) is connected to an output terminal of the fuel cell stack (11). The air pump (13) is configured to supply air as an oxidizing agent gas to the fuel cell stack (11). The electric power control unit (15) includes a first circuit unit (31) and a second circuit unit (32). The first circuit unit (31) is connected to the output terminal of the fuel cell stack (11) and is configured to perform step-up electric power conversion on an input from the fuel cell stack (11). The second circuit unit (32) is configured to perform bidirectional electric power conversion for stepping-up an input from the fuel cell stack (11) and for stepping-down an output to the air pump (13).

Abstract: A heat radiation structure of an electric parts assembly, a heat conduction sheet, and a method of manufacturing an electric parts assembly are provided that are capable of reducing a gap between neighboring separate sheets after sheet compression while minimizing an unintentional increase in sheet reaction force. A heat conduction sheet (101A) disposed between a cooler and a heat generating element includes a plurality of separate sheets (102), each of the separate sheets (102) includes a plurality of convex sections protruding circumferentially outward from the sheet and a plurality of concave section recessed circumferentially inward on an outer circumferential edge of a shape when seen in a plan view in a state before being pinched between a cooler and a heat generating element, and the convex sections and the concave sections are disposed to be arranged alternately in a circumferential direction of the separate sheets (102) in a shape when seen in a plan view.

Abstract: A power supply control system includes: an electric device; an inverter; a first drive unit including a first fuel cell system, a first voltage converter, and a first battery; a second drive unit including a second fuel cell system, a second voltage converter, and a second battery; and a control unit that controls the inverter and/or the first fuel cell system so that a first current value flowing through the first battery reaches a target value of the first current value and controls the second voltage converter and/or the second fuel cell system so that a second current value flowing through the second battery reaches the target value of the first current value.

Abstract: A power feed control system includes: a first drive unit configured to include a first electrically driven device, a first inverter, a first fuel battery system, and a first voltage converter; a second drive unit configured to include a second electrically driven device, a second inverter, a second fuel battery system, and a second voltage converter; a common battery; and a control unit configured to perform control of the first inverter or/and the first voltage converter such that each current value of the first inverter and the first fuel battery system achieves a target value of a first current value that is determined on the basis of the first current value flowing between the first drive unit and the battery and a second current value flowing between the second drive unit and the battery and perform control of the second inverter or/and the second voltage converter such that each current value of the second inverter and the second fuel battery system achieves a target value of the second current value th

Abstract: A fuel battery system in which the complexity of a constitution is able to be minimized is provided. A fuel battery system includes a battery (11), a motor (13), a fuel battery stack (15), and an electric power control unit (17). The electric power control unit (17) includes a battery control unit (21) connected to the battery (11), first and second bridge circuits (23A and 23B) connected in parallel with and integrated with the battery control unit (21), and an electric power control unit (25) including the second bridge circuit (23B) and a three-phase reactor (35). The electric power control unit (25) is connected to the fuel battery stack (15) so that stepping-up control is possible.