High-efficiency airplane power supply architecture

Abstract

The invention discloses a high-efficiency airplane power supply framework which comprises a fuel cell, a lithium battery pack, a first diode D1, a second diode D2, a pre-charging resistor R1, a first switch S1, a second switch S2, a consumption resistor R2, a third switch S3, a frequency converter input capacitor C1 and an external electric appliance connected with a frequency converter. The fuel cell, the second diode D2, the pre-charging resistor R1, the first switch S1 and the consumption resistor R2 form a preheating circuit module; the fuel cell, the second diode D2, the pre-charging resistor R1, the first switch S1, the second switch S2, the consumption resistor R2 and the frequency converter input capacitor C1 form a pre-charging circuit module; the fuel cell, the second diode D2, the lithium battery pack, the first diode D1, the third switch S3 and the frequency converter input capacitor C1 form a hybrid power supply output circuit module; the second switch S2, the consumption resistor R2 and the frequency converter input capacitor C1 form a discharging circuit module; comprehensive management of aircraft energy control is achieved, and the number of equipment is reduced while the equipment size is reduced.

Description

technical field [0001] The invention belongs to the technical field of energy management of aviation electrical systems, and in particular relates to a high-efficiency aircraft power supply structure. Background technique [0002] With the continuous growth of the air traffic market and the increasing pollution of aviation fuel to the environment, electric aircraft have gained the favor of the market. Electric aircraft use new energy sources such as solar energy and electric energy to drive propellers, ducted fans or other devices through electric motors to generate electricity. Forward power, effectively reducing the consumption of fossil fuels, has become the development trend of the aviation industry. [0003] The energy storage of electric aircraft generally uses batteries or fuel cells. At this stage, the energy density of lithium batteries cannot be greatly improved, and pure lithium battery aircraft cannot meet the long-range requirements. If pure fuel cells are use...

AI Technical Summary

Problems solved by technology

[0004] The no-load voltage of the fuel cell is high, and after being mixed with the lithium battery, a large current loop is easily formed in the circuit; in addition, because the motor controller of the aircraft has a large bus capacitance, the high-voltage battery directly added to the capacitance in the cold start state is equivalent to Direct short circuit, so it is necessary to design a pre-charging circuit to avoid it; and the pre-charging circuit is used infrequently and weighs a lot, which does not meet the strict weight requirements of the aircraft

Images