Position Sensorless Control of Aero-Engine Shaft-Line-Embedded SRS/G at Starting Stage Based on Linear Inductance Residual Calculation and DCSOGI-FLL-WSS

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Abstract
The precise control of speed and torque in switched reluctance machines (SRMs) depends largely on high-precision, real-time position information acquired from coaxially mounted mechanical position sensors. However, in the shaft-line-embedded starter/generator (ESG) system, the operating environment temperature exceeds $350~^{\circ }$ C, where mechanical position sensors could not only increase the overall size of the drive system, but also reduce its reliability under high-temperature conditions. To explore the application of SRMs in the integrated starter/generator systems of more-electric aero-engines and remove mechanical position sensor, this article proposes a position sensorless control method based on linear inductance residual calculation combined with delay-compensated second-order generalized integrator frequency-locked loop with soft start-up (DCSOGI-FLL-WSS) to improve the position estimation accuracy at room and high-temperature environments. The performance of position estimation, system efficiency, and torque ripple under rated load, 1.5 times overload, and speed regulation conditions were also compared and analyzed. Experimental results show that the starting process of ESG can be easily achieved by the proposed method under different temperatures conditions. Due to the changes in the parameters of the SRS/G caused by the high-temperature environment, the accuracy of position estimation under the working condition of $350~^{\circ }$ C decreases. However, the proposed method demonstrates advantages in terms of position estimation accuracy, system efficiency, and torque ripple reduction for SRS/G systems.
Funding Information
  • National Natural Science Foundation of China (52277067)
  • Aeronautical Science Foundation of China (20220040053001)
  • Shaanxi Provincial Science Foundation for Distinguished Young Scholars (2023-JC-JQ-44)
  • Dreams Foundation of Jianghuai Advance Technology Center (2023-ZM01J001)
  • research projects of AVIC Shaanxi Aero Electric Company Ltd. (JSJSHT2312280030)

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