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

Download

index.pdf

Date

2022-2-01

Author

Saraç, Hakan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

397
views

236
downloads

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

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Fault Tolerance Capabilities of Three, Four and Six-Phase Configurations of a 24 Slot Modular PMSM Bayazıt, Göksenin Hande; Keysan, Ozan (2019-07-01) In this study, fault tolerance and redundancy capabilities of different phase and winding configurations of an Integrated Modular Motor Drive (IMMD) system are investigated. This is made possible by manipulating gate drive signals of the inverter and phase connections. Three and four phase connections as well as symmetric and asymmetric six-phase topologies are described. Control strategies and redundancy possibilities of these different topologies under an open circuit fault condition are examined in MATLA...
Condition monitoring and fault diagnosis of electrical motor drive systems Demirel, Aykut; Keysan, Ozan; Department of Electrical and Electronics Engineering (2019) Increasing utilization of electrical machines results in an increasing demand of high reliability and safety. Especially in mission critical applications, unexpected failures of these machines may bring irrecoverable damages to the systems. Furthermore, such failures may be hazardous to human life in military or aerospace applications. One method to meet the reliability and safety requirement is introducing redundant modules to be used in case of an emergency. However, adding extra modules as substitutes in...
Comparison of Inverter Topologies Suited for Integrated Modular Motor Drive Applications Ugur, Mesut; Sarac, Hakan; Keysan, Ozan (2018-08-30) In this paper, various inverter topologies are compared for integrated modular motor drive (IMMD) applications. Two-level voltage source inverter (2L-VSI), three level voltage source inverter (3L-VSI) and series/parallel combinations of these topologies with system level modularity are compared in terms of voltage and current harmonic spectrum, passive component sizes and motor drive efficiency. New generation wide band-gap GaN power semiconductor devices are utilized in modular topologies and they are comp...
Model predictive torque control of an induction motor enhanced with an inter-turn short circuit fault detection feature Şahin, İlker; Keysan, Ozan; Ertan, Hulusi Bülent; Department of Electrical and Electronics Engineering (2021-9-9) Model predictive control (MPC) is a popular research topic in modern power electronics and it has been applied to a large variety of power converters and electric drives. The reason behind this interest in MPC is the advantages that it offers: intuitive and flexible algorithm, fast dynamic response, ease of handling converter nonlinearities, and system constraints, to name a few. In this thesis, MPC is applied to the torque control of an induction motor (IM). Involving both the theoretical foundation, compu...
Performance evaluation of a wind driven DOIG using a hybrid model Cadirci, I; Ermiş, Muammer (1998-06-01) This paper presents the performance analysis of a wind driven double output induction generator (DOIG) operating at varying shaft speeds. A periodic transient state analysis of DOIG equipped with two controlled converters is carried out using a hybrid induction machine model. It is shown that practical aspects of converters such as overlap and harmonics reduce the power output of the DOIG system and limit the operating shaft speed range, especially in the subsynchronous region near the synchronous speed. Va...

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.