Title: Sensor fault diagnostics and resilient control in PMSM drives for EVs using LADRC

Authors: Sankhadip Saha; Urmila Kar

Addresses: Department of Electrical Engineering, Netaji Subhash Engineering College, Kolkata, West Bengal, 700152, India ' Department of Education and Management, National Institute of Technical Teachers' Training and Research, Kolkata, West Bengal, 700106, India

Abstract: The paper introduces a novel comprehensive strategy for detecting and categorising sensor faults and proposes a fault-resilient control (FRC) scheme based on linear active disturbance rejection control (LADRC) specifically designed for permanent magnet synchronous motor (PMSM) drives for electric vehicles (EVs). The approach includes a rapid yet effective method for identifying speed sensor faults without relying on estimated speed values, enhancing the autonomy of sensor diagnostic phases, and employing a discrete sliding mode observer (D-SMO) for speed sensorless fault-resilient control. Additionally, the paper suggests a hybrid method for localising and categorising current sensor faults, merging model-based and signal-based techniques. The proposed second-order LADRC technique is employed for speed regulation in field-oriented control (FOC), demonstrating its effectiveness in estimating and counteracting external disturbances while addressing current sensor fault detection challenges in EV applications. Simulation and experimental tests validate the efficacy of the proposed sensor diagnostic method for fault-resilient control of PMSM drives.

Keywords: fault detection; fault categorisation; FRC; fault-resilient control; LADRC; linear active disturbance rejection control; D-SMO; discrete sliding mode observer; PMSM; permanent magnet synchronous motor; EV; electric vehicle.

DOI: 10.1504/IJAAC.2025.149529

International Journal of Automation and Control, 2025 Vol.19 No.6, pp.635 - 668

Received: 12 Mar 2024
Accepted: 25 Jul 2024
Published online: 05 Nov 2025 *

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