An aircraft emergency redundancy power supply circuit

Abstract

The invention belongs to the aviation electric field, and relates to a redundance power supply circuit for plane emergency. The redundance power supply circuit comprises a 28 / 24 V emergency bus bar, a 28 V emergency bus bar and power generators which are used for supplying power to the two emergency bus bars correspondingly. The 28 / 24 V emergency bus bar supplies power to key equipment which guarantees flight safety, and the 28 V emergency bus bar supplies power to other emergency equipment. When any one of the two power supply power generators works, the 28 / 24 V emergency bus bar and the 28 V emergency bus bar are connected to supply power to all emergency equipment. When the two power supply power generators do not work, and an emergency power supply switch is turned on, only the 28 / 24 V emergency bus bar supplies power to the key equipment. After the redundance power supply circuit is adopted, a plane emergency power source does not need to be arranged additionally, and it can be guaranteed that plane tasks can be accomplished to the largest extent under the premise of flight safety of planes.

Description

technical field [0001] The invention belongs to the field of aviation electrics and relates to an aircraft emergency redundancy power supply circuit. Background technique [0002] The DC power supply system of a certain type of aircraft is an old-fashioned semi-mechanical power distribution control network. Eight DC generators are used as the main DC power supply of the aircraft. The DC emergency power supply includes No. 4 (F4) and No. 5 (F5) DC generators and batteries. Group. When the DC power system provides emergency power supply, F4, F5 and the battery are connected in parallel to supply power to the DC emergency equipment on board. In the emergency power supply of the DC power supply system, if there are F4, F5 DC generators or any one of them participating in the emergency power supply, the emergency power supply time on the aircraft is not limited; if only the battery is used for emergency power supply, in order to ensure the flight safety of the aircraft, the Eme...

AI Technical Summary

Problems solved by technology

Due to the large demand for DC emergency power consumption of certain mission equipment of this aircraft type, when the DC emergency power supply of the aircraft is supplied only by the battery pack to the mission equipment and key equipment to ensure the flight safety of the aircraft, the emergency power supply time cannot meet the requirement of not less than 15 minutes. requirements, it is difficult to increase the battery capacity on the aircraft, and it is difficult to ensure the flight safety of the aircraft and satisfy the mission completion of the aircraft to the greatest extent.

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