Abstract: A power generation device includes: a power generator, a power conversion circuit, a first interruption circuit, a second interruption circuit, a first monitoring circuit which monitors an output current from the power generator to the power conversion circuit and outputs a first interruption signal when an absolute value of the output current exceeds a first predetermined value, and a second monitoring circuit which monitors a total value of output voltages of respective phases of the power generator and outputs a second interruption signal when an absolute value of the total value exceeds a second predetermined value. The first interruption circuit interrupts a connection between the power generator and the power conversion circuit in accordance with the output of the first or second interruption signal. The second interruption circuit interrupts a connection between three-phase coils and the neutral point in accordance with the output of the first or second interruption signal.

Abstract: A fuel supply system includes a gear pump, and a minimum pressurizing check valve including a cylinder and a piston that partitions the internal space of the cylinder into a first chamber that communicates with the metering section and a second chamber that communicates with a system inlet, the piston is spring-biased in a direction toward the first chamber, a side wall of the cylinder is provided with an outflow port having an opening degree adjusted as the piston moves back and forth, the minimum pressurizing check valve keeps a differential pressure between the system inlet and the outlet of the metering section constant when the rotation speed of the gear pump is equal to or more than a lower threshold and is equal to or less than an intermediate threshold.

Abstract: A fuel supply control device (10) is configured to generate an operation amount used for feedback-controlling rotation of a gear pump (3) based on a deviation of a detected fuel flow rate with respect to a target flow rate, wherein the fuel supply control device generates the operation amount such that a rotation speed of the gear pump is equal to or greater than a predetermined lower limit rotation speed Nmin so as to protect a bearing of the gear pump.

Abstract: A fuel supply control device (10) is configured to generate an operation amount used for feedback-controlling rotation of a gear pump (3) based on a deviation of a detected fuel flow rate with respect to a target flow rate, wherein the fuel supply control device generates the operation amount such that a rotation speed of the gear pump is equal to or greater than a predetermined lower limit rotation speed Nmin so as to protect a bearing of the gear pump.

Abstract: An energy recovery device for an aircraft includes: a turbine that is provided between a cabin of the aircraft and an opening for discharging cabin discharge air from the cabin to the outside of the aircraft and is operated by only the cabin discharge air; and a power generator that is driven by the turbine.