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Improved Performance of Direct Torque Control of Induction Machine utilizing 3-Level Cascade H-Bridge Multilevel Inverter

Zuber Ahmadi, Muhd Zharif Rifqi and Jidin , Auzani and Othman, Md Nazri and JOPRI, MOHD HATTA and Manap, Mustafa (2013) Improved Performance of Direct Torque Control of Induction Machine utilizing 3-Level Cascade H-Bridge Multilevel Inverter. In: Power Engineering and Optimization Conference (PEOCO), 2013 IEEE 7th International, 3 june 2013, Langkawi Island, Malaysia.

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Abstract

This paper presents the advantages of using multilevel inverter which can provide greater number of voltage vector selection in minimizing the output torque ripple for Direct Torque Control (DTC) of induction machines. By employing a 3-level Cascaded H-Bridge Multilevel Inverter (CHMI), it provides 19 effective voltage vectors where each vector may give different effects on control performance for various operating conditions. This paper reports a simple switching strategy based on the hysteresis controllers and lookup table for DTC utilizing a 3-level CHMI. The torque hysteresis controller with 7-level of hysteresis band is introduced to determine the most appropriate voltage vectors which inherently suitable for different motor operating conditions. It can be shown that the selection of the proposed voltage vectors using multilevel inverter has better DTC performances in terms of torque ripple and quality of output waveforms (i.e. THD) as compared to the DTC with the conventional 2-level inverter.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Electrical Engineering > Department of Power Electronics & Drives
Depositing User: Dr Auzani Jidin
Date Deposited: 27 May 2014 10:45
Last Modified: 28 May 2015 04:25
URI: http://eprints.utem.edu.my/id/eprint/12507

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