Improved Sensorless Control of Multiphase Synchronous Reluctance Machine Under Position Sensor Fault

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Abstract
This paper presents an investigation on the self-sensing capability of a dual three-phase synchronous reluctance motor. Self-sensing capability refers to the ability of the motor to properly operate in a sensorless drive. The multiphase machine is decomposed into two different three-phase systems according to the multi-stator approach. Several supply scenarios are studied where the two three-phase windings are controlled at different operating points along a reference trajectory. The analysis is carried out both with FEA simulations and experimental tests. In the first part of the paper the rotor is locked to derive the observer trajectories and find the regions in which the motor can operate without position sensor. A comparison between simulated and experimental results is given. Finally, a sensorless control strategy that allows exploiting the motor self-sensing capability under position sensor fault is developed and validated through experimental tests.
Funding Information
  • Ministero dell’Istruzione, dell’Università e della Ricerca (PRIN 2017)
  • Green SEED: Design of more-electric tractors for a more sustainable agriculture (2017SW5MRC)
  • Department of Industrial Engineering, University of Padova (SID BIRD211289)

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