Universiti Teknologi Malaysia Institutional Repository

A wide-speed high torque capability utilizing overmodulation strategy in DTC of induction machine with constant switching frequency controller

Jidin, Auzani and Md. Basar, Mohd. Farriz and Nik Idris, Nik Rumzi and Mohd. Yatim, Abdul Halim and Noordin, Aminurrashid (2009) A wide-speed high torque capability utilizing overmodulation strategy in DTC of induction machine with constant switching frequency controller. In: International Conference on Power Electronics and Drive Systems, 2009. PEDS 2009. , 2009, Taipei, Taiwan.

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Official URL: http://dx.doi.org/10.1109/PEDS.2009.5385847

Abstract

This paper presents a simple overmodulation method employed in direct torque control (DTC)-constant switching frequency (CSF) controller of induction machines. The proposed overmodulation method is utilized to extend a constant torque region and hence produces high torque capability in field weakening region with six-step operation. It will be shown that the overmodulation operation using the DTC-CSF scheme can be established by controlling the stator flux locus from circular to the hexagonal shape. This is achieved by modifying the flux error status produced from flux hysteresis controller, before it is being fed to the look-up table. The main benefit in the proposed strategy is its simplicity and it can be implemented in many electric drive applications to obtain maximum torque capability for a wider speed range operation.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:direct torque control, field weakening, induction machine, overmodulation
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:14712
Deposited By: Liza Porijo
Deposited On:12 Sep 2011 01:58
Last Modified:12 Sep 2011 01:58

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