High-speed generator directly driven by air turbine

Abstract

The invention relates to a generator, in particular to a high-speed generator directly driven by an air turbine, wherein the high-speed generator is used for an air vehicle. The high-speed generator directly driven by the air turbine comprises a generator outer shell, a generator receiver and a turbine rotor, and further comprises a permanent magnet combination and a coil winding, wherein an annular airflow channel is formed by the turbine rotor and the generator receiver, the permanent magnet combination is in an circular ring shape and fixed on the periphery of a final-level rotor body of the turbine rotor, the coil winding forms a cylindrical shape and is arranged on the outer surface of the generator receiver in a surrounding mode, and the coil winding is fixed on the generator receiver through the generator outer shell. The high-speed generator directly driven by the air turbine has the advantages of being high in specific power, high in design total pressure dropping ratio, capable of well and automatically balancing the acting force of airflow on a wheel hub, compact in structure, capable of carrying out automatic cooling and capable of providing cooling air sources for the external.

Description

technical field [0001] The invention relates to an electric generator, especially an air turbine driven high-speed electric generator used on an aircraft. Background technique [0002] For aircraft that use engines without rotating parts such as rocket engines and ramjet engines as power plants, the main power supply on board usually adopts a technical solution powered by a thermal battery or a lithium battery with higher specific energy. When the flight time of the aircraft is short and the power consumption required by the aircraft is small, it is reasonable and feasible to use a thermal battery or a lithium battery for power supply. Taking the lithium battery used by an aircraft as an example, the rated capacity of the lithium battery is 10Ah , The working voltage is 27V, the corresponding external dimensions are 132mm×155mm×117mm (excluding the mounting flange), and the weight is 5kg. However, when the flight time of the aircraft is longer (about 5 minutes or more), the...

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Problems solved by technology

Therefore, for aircraft that use engines without rotating parts such as rocket engines and ramjet engines as power plants, the main power supply of the aircraft will be a technical bottleneck that restricts the increase of the flight time (range) of the aircraft.

[0003] In addition, for some micro-turbojet engines used as power plants for small long-endurance aircraft, due to the limitation of the internal size of the engine rotor, it is impossible to equip traditional generators. Such as 5h), the technical solution of using thermal battery or lithium battery as the main power supply of the aircraft will become completely unfeasible

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