Direct current bus control scheme

    公开(公告)号:US12107409B2

    公开(公告)日:2024-10-01

    申请号:US17749319

    申请日:2022-05-20

    摘要: Examples described herein provide an electric power distribution system (EPDS) that includes a transformer rectifier unit (TRU) that receives alternating current (AC) electric power from an AC electric power source during a first state of operation. The EPDS further includes a direct current (DC) electric power source that receives the DC electric power from the TRU during the first state of operation. The EPDS further includes a DC essential bus that receives the DC electric power from the DC electric power source during the first state of operation and that receives the DC electric power from another source during a second state of operation. The EPDS further includes a controller to selectively engage a diode bypass contactor to enable a diode during the second state of operation, and selectively engage the diode bypass contactor to enable a diode bypass during the first state of operation.

    Fuel cell system and air vehicle
    5.
    发明授权

    公开(公告)号:US12083931B2

    公开(公告)日:2024-09-10

    申请号:US17659933

    申请日:2022-04-20

    IPC分类号: B60L58/33 B64D41/00 H01M8/00

    摘要: To provide a fuel cell system configured to prevent the freezing of the gas and water discharge valve of the fuel gas system even at high altitude. A fuel cell system for air vehicles, wherein the fuel cell system comprises: a fuel cell, a fuel gas system for supplying fuel gas to the fuel cell, a cooling system for controlling a temperature of the fuel cell, an altitude sensor, a temperature sensor, and a controller, and wherein, when the controller detects an altitude increase measured by the altitude sensor, and when a temperature of the gas and water discharge valve measured by the temperature sensor is less than a predetermined temperature, the controller increases a temperature of the refrigerant by controlling the three-way valve to circulate the refrigerant in the heating flow path and operating the circulation pump and the water heater to heat the refrigerant.

    Recirculation ground maintenance mode

    公开(公告)号:US12065250B2

    公开(公告)日:2024-08-20

    申请号:US17116224

    申请日:2020-12-09

    摘要: An aircraft air conditioning system includes a lower cooling zone and an upper cooling zone. The lower cooling zone includes a lower recirculation heat exchanger configured to receive cabin air from a cabin and convert the cabin air into lower cooled recirculated cabin air. The upper cooling zone includes an upper recirculation heat exchange configured to receive the cabin air from the cabin and convert the cabin air into upper cooled recirculated cabin air. A power system selectively delivers power to the lower cooling zone and the upper cooling zone. A controller is in signal communication with the power system. The controller determines a target temperature of the cabin and invokes a recirculation ground maintenance mode that commands the power system to deliver power to one or both of the lower cooling zone and the upper cooling zone so that a temperature of the cabin reaches the target temperature.

    COOLING ARCHITECTURE USING CRYOGENIC FUELS
    9.
    发明公开

    公开(公告)号:US20240208661A1

    公开(公告)日:2024-06-27

    申请号:US18146001

    申请日:2022-12-23

    发明人: Abbas A. Alahyari

    摘要: A system for cooling a superconducting motor includes a combustor and fuel tank that contains a fuel. The system further includes a cooling system that provides the fuel to the superconducting motor or a cryocooler to cool the superconducting motor, resulting in at least partially vaporized fuel coming out of the superconducting motor or cryocooler. The cooling system also a cryocooler and a two-phase ejector that mixes the fuel from the tank and the at least partially vaporized fuel to produce a mixed fuel. The combustor receives the mixed fuel and generates electric power due its combustion. The power can be provided to the superconducting motor.