Adaline-Based Control Schemes for Non-Sinusoidal Multiphase Drives—Part II: Torque Optimization for Faulty Mode

Duc Tan Vu, Ngac Ky Nguyen, Eric Semail and Hailong Wu
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Duc Tan Vu: University Lille, Arts et Métiers Institute of Technology, Central Lille, Junia, ULR 2697-L2EP, F-59000 Lille, France
Ngac Ky Nguyen: University Lille, Arts et Métiers Institute of Technology, Central Lille, Junia, ULR 2697-L2EP, F-59000 Lille, France
Eric Semail: University Lille, Arts et Métiers Institute of Technology, Central Lille, Junia, ULR 2697-L2EP, F-59000 Lille, France
Hailong Wu: University Lille, Arts et Métiers Institute of Technology, Central Lille, Junia, ULR 2697-L2EP, F-59000 Lille, France

Energies, 2021, vol. 15, issue 1, 1-21

Abstract: Fault tolerance has been known as one of the main advantages of multiphase drives. When an open-circuit fault happens, smooth torque can be obtained without any additional hardware. However, a reconfiguration strategy is required to determine new reference currents. Despite advantages of non-sinusoidal electromotive forces (NS-EMFs) such as high torque density, multi-harmonics existing in NS-EMFs cause more challenges for control, especially under faulty conditions. Therefore, to guarantee high-quality vector control of multiphase drives with multi-harmonic NS-EMFs, this two-part study proposes control schemes using adaptive linear neurons (Adalines) to adaptively eliminate torque ripples. The proposed simple Adalines are efficient because of taking advantage of the knowledge of rotor position and of torque harmonic rank induced by the NS-EMFs. The control scheme using an Adaline for healthy mode was described in part I of this study. In this second part, the control scheme using another Adaline for an open-circuit operation, under the impacts of multi-harmonics in NS-EMFs, is proposed. Notably, smooth torque and similar copper losses in the remaining healthy phases can be obtained. Experimental tests are carried out on a seven-phase permanent magnet synchronous machine (PMSM) with a high total harmonic distortion (THD = 38%) of NS-EMFs. A demonstration video is provided with this paper.

Keywords: multiphase machine; seven-phase machine; non-sinusoidal electromotive force; fault tolerance; torque ripple elimination; adaptive linear neuron (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: 2021
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