Fault tolerant control of a dual-three-phase electrical machine with predictive current control and reduced computation burden

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2022-2-01

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Saraç, Hakan

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Fault tolerance concept on electrical drives has gained more importance as electrical machines started to play more role in missin critical applications such as aircraft, EVs and HEVs. Redundant drives are a straightforward but an expensive solution. In conventional three-phase electrical drives, when an open or short circuit fault occurs on a phase of the machine, overall drive system is affected and operation of the machine becomes no longer possible. Therefore electrical machines with multiple phases or phase groups are more desirable for fault tolerant applications. However, increasing number of phase groups introduces complexity to the control of the machine. In this thesis, a fault tolerant controller will be introduced for a dual three-phase electrical drive system for open phase faults. Along with the controller, details about the implementation of the algorithm on a DSP is discussed. To minimize the copper losses and torque ripples in faulty condition, an online calculation method is implemented. For the current control, an SVM based predictive current controller is implemented, with a proposed computational burden reduction method.

Subject Keywords

Integrated Modular Motor Drive Systems, Fault Tolerant Drive, Space Vector Modulation, Model Predictive Control, Digital Signal Processor, Computation Burden Reduction, Multiphase Electric Drive, Open Phase Fault

URI

https://hdl.handle.net/11511/96722

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

H. Saraç, “Fault tolerant control of a dual-three-phase electrical machine with predictive current control and reduced computation burden,” M.S. - Master of Science, Middle East Technical University, 2022.