Characteristics Testing and Torque Control of Switched Reluctance Machine in Aero-engine Shaft-Line-Embedded Starter/Generator

This paper describes the basic concepts and advantages of more electric aircraft (MEA). Shaft-line-embedded starter/generator is one of the key technologies to enhance the comprehensive performance of MEA. Switched reluctance machines (SRM) have no permanent magnets and are suitable for high speed which makes them perform well at high temperatures and high-speed operation. Besides, the concentrated stator windings have strong fault tolerance. So it possesses good application prospects in shaft-line-embedded integrated aero-engine starter/generator system to satisfy the high-temperature and high-speed operation. To broaden the application of SRM in high-temperature environments and achieve the efficient transmission of airborne energy, this paper aims at high-temperature applications in aero-engine which is over 350°C. Lastly, the direct instantaneous torque control method was used to reduce the torque fluctuation during the motoring process. It demonstrates that the high-temperature environment is beneficial to reduce the torque ripple of the SRM.