Methods and systems for operating an auxiliary power unit (APU) of an aircraft are described. The method comprises obtaining external environment parameters of the aircraft, determining an available output power for the APU as a function of the external environment parameters, and setting an overcurrent protection threshold of the APU to a level associated with the available output power.

Methods and systems for operating an auxiliary power unit (APU) of an aircraft are described. The method comprises obtaining external environment parameters of the aircraft, determining an available output power for the APU as a function of the external environment parameters, and setting an overcurrent protection threshold of the APU to a level associated with the available output power.

A computer controls voltage supply for a system that includes a plurality of active cables. The computer determines that a first voltage source included in a first cable has failed to provide a required amount of voltage to the first cable. The computer switches the first cable to a second voltage source included in a second cable. The second voltage source provides voltage to the first cable.

A computer controls voltage supply for a system that includes a plurality of active cables. The computer determines that a first voltage source included in a first cable has failed to provide a required amount of voltage to the first cable. The computer switches the first cable to a second voltage source included in a second cable. The second voltage source provides voltage to the first cable.

A power supply system is connected to a load, and the power supply system includes a power supply apparatus and a backup apparatus. When an input power is normal, the power supply apparatus converts the input power into a first output power, provides the first output power to the power bus, and selectively provides the first output power to charge the backup apparatus, in which the first output power has a first rated upper-limit value. When the input power is normal and a required power of the load is greater than the first rated upper-limit value, the backup apparatus provides a second output power to the power bus so that the sum of the first output power and the second output power meets the required power of the load.

A power supply system is connected to a load, and the power supply system includes a power supply apparatus and a backup apparatus. When an input power is normal, the power supply apparatus converts the input power into a first output power, provides the first output power to the power bus, and selectively provides the first output power to charge the backup apparatus, in which the first output power has a first rated upper-limit value. When the input power is normal and a required power of the load is greater than the first rated upper-limit value, the backup apparatus provides a second output power to the power bus so that the sum of the first output power and the second output power meets the required power of the load.

Provided are embodiments for a circuit for detecting discrete inputs. The circuit includes a power source, a diode set coupled to the power source, a line replaceable unit (LRU) circuit, and a logic detection and processing circuit that is operably connected to the first LRU, wherein the logic detection and processing circuit is configured to detect a state of the LRU based on a detected voltage. Also, provided are embodiments of a method for operating a logic detection and processing circuit.

Provided are embodiments for a circuit for detecting discrete inputs. The circuit includes a power source, a diode set coupled to the power source, a line replaceable unit (LRU) circuit, and a logic detection and processing circuit that is operably connected to the first LRU, wherein the logic detection and processing circuit is configured to detect a state of the LRU based on a detected voltage. Also, provided are embodiments of a method for operating a logic detection and processing circuit.

A remote automatic control power supply system is disclosed, comprising a power supply control device and an electronic device having a control circuit, in which the power supply control device is configured to control whether the power supply is to be outputted, and the control circuit can set the GPS coordinate and the starting distance value close to the power supply control device; afterwards, it is possible to operate the control circuit via the backend of the electronic device such that, when the distance between the real-time GPS coordinate of the electronic device and the GPS coordinate of the power supply control device is equivalent to the starting distance value, the control circuit can transmit a power control signal to the power supply control device thereby allowing the power supplying control device to output the electric power to the receiving end.

A remote automatic control power supply system is disclosed, comprising a power supply control device and an electronic device having a control circuit, in which the power supply control device is configured to control whether the power supply is to be outputted, and the control circuit can set the GPS coordinate and the starting distance value close to the power supply control device; afterwards, it is possible to operate the control circuit via the backend of the electronic device such that, when the distance between the real-time GPS coordinate of the electronic device and the GPS coordinate of the power supply control device is equivalent to the starting distance value, the control circuit can transmit a power control signal to the power supply control device thereby allowing the power supplying control device to output the electric power to the receiving end.