Aircraft electrical system operating method

a technology of electrical system and operating method, which is applied in the direction of motor/generator/converter stopper, dynamo-electric converter control, instruments, etc., can solve the problems of engine shutdown, undemanded power drop, engine thrust control loss, etc., and achieve the effect of preventing fuel from leaking into the oil system
US20160185462A1Active Publication Date: 2016-06-30ROLLS ROYCE PLC
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
ROLLS ROYCE PLC
Publication Date
2016-06-30

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Abstract

A method of controlling an aircraft electrical system (40). The electrical system (40) comprises an alternating current electrical machine (56, 58) comprising a plurality of phases, each phase having a power rating, the electrical machine (56, 58) being configured to operate on failure of one or more phases. The method comprises: determining a power requirement; sensing a fault of one or more phases of the electrical machine (56, 58), and controlling the electrical machine (56, 58) to operate in a fault condition, in which the remaining phases of the electrical machine (56, 58) provide the electrical power requirement; and providing an overrating signal to a flight computer (66) of the aircraft (2) where the power provided by each phase exceeds the power rating of the respective phase.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to an aircraft electrical system, and to a method of controlling an aircraft electrical system to provide fault tolerant operation.BACKGROUND TO THE INVENTION

[0002] Aircraft such as passenger aircraft comprise a number of powered systems, such as control surface actuators, passenger air systems and avionics. In traditional aircraft, some of these systems are electrically powered, while others are pneumatically or hydraulically powered. Aircraft engines, such as gas turbine engines, also comprise a number of powered accessory systems, such as fuel and oil pumps, which are powered by the engine itself. In recent years, there has been a move to provide electrically powered systems for aircraft and aircraft engine accessory systems to replace some or all of the pneumatic or hydraulic systems in order to save weight or reduce fuel burn, or a combination of the two. Aircraft having more electrical systems compared to traditional air...

Claims

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