Sensorless Speed Control and High-Performance Fault Diagnosis in VSI-Fed PMSM Motor Drive Under Open-Phase Fault: Analysis and Experiments

Abstract : This paper aims to provide a high-performance sensorless fault-tolerant direct torque control of permanent magnet synchronous motor based on nonlinear position and speed observer. The nonlinear observer is based on a trigonometric function to estimate the rotor position, and a proportional–integral controller is used to estimate the speed from estimated position. A faulty leg (open phase) in the PWM VSI changes the corresponding terminal voltage and introduces the voltage distortions to each phase voltage. The ordinary two-level inverter is composed of three legs. In the proposed fault-tolerant inverter, a redundant leg is added that replaces the faulted leg. The detection of the open-phase fault is based only on the current signals and the maximum threshold they exceed that in case of fault.
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Submitted on : Friday, May 10, 2019 - 2:23:53 PM
Last modification on : Friday, November 29, 2019 - 2:31:26 AM

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Mongi Moujahed, Hechmi Benazza, Mohamed Jemli, Mohamed Boussak. Sensorless Speed Control and High-Performance Fault Diagnosis in VSI-Fed PMSM Motor Drive Under Open-Phase Fault: Analysis and Experiments. Iranian Journal of Science and Technology, Transactions of Electrical Engineering, 2018, 42 (4), pp.419-428. ⟨10.1007/s40998-018-0088-y⟩. ⟨hal-02125430⟩

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