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Key Techniques and Difficulties in Design of Multi-Electric Engine Components
The design of multi-electric engine components requires light weight, small size, high power density, strong durability, high degree of integration of the engine and the aircraft system, high temperature resistance, good thermal management characteristics, and advanced control technology. Therefore, the following key technologies and difficulties need to be solved. . High temperature active magnetic bearing technology 1. Non-contact high temperature position sensor. The technical difficulties are the temperature compensation technology of the sensor in the range of 0°C to 600°C, the manufacturing technology of small-diameter (approx. 0.1mm) sensor coils and the stable working technology at high temperatures. The high-temperature displacement sensors currently studied include inductive sensors, capacitive sensors, magnetic flux sensors, and eddy current sensors. The United States has tested inductive position sensors that can operate at 650°C. 2. High temperature ferromagnetic material. It is necessary to develop ferromagnetic materials with high temperature resistance, high saturation magnetic density, high strength, and low eddy current loss for magnetic bearing rotors and stator laminations. 3. Solenoid insulation material. The magnetic bearings of multi-electric motors are required to operate at a high temperature of 550°C. Therefore, it is necessary to use a high-temperature insulating material as the insulating layer of the field coil. At present, the ceramic material used is relatively brittle, and it is easy to break and fall off during processing, and its service life is short. Therefore, it is necessary to develop an insulating material with a long life and a better performance. The technical difficulties of the built-in integral starter/generator technology include starter/generator design and start/power generation in addition to high-temperature ferromagnetic materials and insulating materials similar to magnetic bearings, eddy current loss control, electromagnetic shielding, and integrated control with the engine. The integrated design of the engine and the engine is also a technical difficulty.