HIL-Based Fault-Tolerant Vector Space Decomposition Control for a Six-Phase PMSM Fed by a Five-Level CHB Converter

Mona Shayeghan, Marco Di Benedetto (), Alessandro Lidozzi and Luca Solero
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Mona Shayeghan: Department of Civil, Computer Science and Aeronautical Engineering, Roma Tre University, 00146 Rome, Italy
Marco Di Benedetto: Department of Industrial, Mechanical and Electronic Engineering, Roma Tre University, 00146 Rome, Italy
Alessandro Lidozzi: Department of Civil, Computer Science and Aeronautical Engineering, Roma Tre University, 00146 Rome, Italy
Luca Solero: Department of Civil, Computer Science and Aeronautical Engineering, Roma Tre University, 00146 Rome, Italy

Energies, 2025, vol. 18, issue 3, 1-22

Abstract: The growing demand for higher reliability and efficiency in modern electric drives, coupled with the increasing adoption of multi-phase machines, has necessitated advancements in fault-tolerant control strategies. This paper presents a fault tolerance analysis for a six-phase permanent magnet synchronous machine (PMSM) connected to a five-level cascaded H-bridge converter, employing a level-shift pulse width modulation (LSPWM) technique. Unlike existing strategies, this work integrates a unique combination of three key innovations: first, a fault detection mechanism capable of identifying faults in both machine phases and inverter legs with high precision; second, an open-circuit fault compensation strategy that dynamically reconfigures the faulty inverter phase leg into a two-level topology to reduce losses and preserve healthy switches; and third, a modified closed-loop control method designed specifically to mitigate the adverse effects of short-circuit faults while maintaining system stability. The proposed approach is validated through rigorous simulations in Simulink and Hardware-in-the-Loop (HIL) tests, demonstrating its robustness and applicability in high-reliability applications.

Keywords: cascade H-bridge (CHB); multi-level inverter (MLI); fault tolerance; level-shifted pulse width modulation (LSPWM); multi-phase PMSM (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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