A multi-electric engine built-in integrated starter power generation system and its control method

Abstract

The invention discloses a multi-electric engine built-in integrated start-up and power generation system and a control method thereof. The system comprises a bearingless permanent-magnet starter generator mounted inside a multi-electric engine, a bearingless double salient starter generator mounted inside the multi-electric engine, an axial magnetic levitation bearing mounted inside the multi-electric engine and a start-up and power generation levitation controller mounted outside the multi-electric engine in an integrated mode; the start-up and power generation levitation controller controls two motors to levitate so as to control a rotor of the multi-electric engine to levitate and eliminate a complex attachment transmission casing and lubricating oil system of the engine; and armature windings of two motors are connected in series, and the start-up and power generation levitation controller regulates a current of an exciting winding of the bearingless double salient starter generator so as to facilitate controlling the start-up and power generation system to generate power and output a direct current voltage. According to the invention, controllable power converter rectification is avoided, the multi-electric engine built-in integrated start-up and power generation system and the control method are simple and reliable in control, and meanwhile, a power density and efficiency of the multi-electric engine built-in integrated start-up and power generation system are improved.

Description

technical field [0001] The invention belongs to the technical field of starting power generation, and in particular relates to a multi-electric engine built-in integrated starting power generation system and a control method thereof. Background technique [0002] The multi-electric engine is the core of the multi-electric / all-electric aircraft. The engine accessory transmission casing with complex structure and prone to failure is no longer used. The starter generator rotor is directly installed inside the multi-electric engine. The overall rotor of the multi-electric engine is supported by magnetic suspension bearings. , Eliminate engine mechanical wear and lubricating oil system, so the multi-electric engine greatly simplifies the structure, saves fuel consumption and reduces pollutant emissions. [0003] For non-propulsion small aeroengines, the U.S. Air Force and Honeywell have carried out research on multi-electric auxiliary power units. Magnetic suspension bearings are...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide a multi-electric engine built-in integrated starter power generation system and its control method, which can overcome the problems of complex suspension control of power generation, poor stability of high-speed operation, and low power density and efficiency.

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