Universiti Teknologi Malaysia Institutional Repository

A simple overmodulation strategy in direct torque control of induction machines

Jidin, Auzani and Ahmad, Md. Zarafi and Nik Idris, Nik Rumzi and Mohamed Yatim, Abdul Halim (2007) A simple overmodulation strategy in direct torque control of induction machines. In: Research and Development, 2007. SCOReD 2007. 5th Student Conference, 11-12 Dec 2007, Selangor, Malaysia.

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Official URL: http://dx.doi.org/10.1109/SCORED.2007.4451437


A fast dynamic torque and high speed operations are so important especially in electric vehicle applications. In principle, there are two approaches to obtain these conditions. One is the use of mechanical gears and the other one is the use of overmodulation strategy. Through overmodulation strategy, the inverter voltage can be increased beyond its linear modulation range, thus full utilization of DC-linked voltage is achieved. This paper presents a simple overmodulation strategy that is well- suited in a constant frequency torque controller-based of direct Torque control (DTC) of induction motor drives. The simple overmodulation strategy is constructed based on torque and flux errors and flux position which are readily available; as required in conventional DTC scheme. The simulation results showed that the drive system is capable of operating in overmodulation and field weakening regions without resolving to the common approach of space vector modulation (SVM) based approach.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:constant frequency torque controller-based, direct torque control, electric vehicle applications, field weakening regions, flux errors, flux position, induction motor drives, inverter voltage, linear modulation, mechanical gears, simple overmodulation strategy, space vector modulation based approach
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:Electrical Engineering
ID Code:7387
Deposited By: Norhafizah Hussin
Deposited On:02 Jan 2009 08:57
Last Modified:01 Jun 2010 15:51

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