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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Perfecting a Video Game with Game Metrics
Nik Rumzi Nik Idris
Universiti Teknologi Malaysia (UTM)
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

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Proposed Voltage Vector to Optimize Efficiency of Direct Torque Control Goh Wee Yen; Ali Monadi; Nik Rumzi Nik Idris; Auzani Jidin; Tole Sutikno
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 4, No 4: December 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Compared to field-oriented control (FOC) system, direct torque control (DTC) system has gained attractiveness in control drive system because of its simpler control structure and faster dynamic control. However, supplying the drive system with rated flux at light load will decrease the power factor and efficiency of the system. Thus, an optimal flux has been applied during steady-state in order to maximize the efficiency of drive system. But when a torque is suddenly needed, for example during acceleration, the dynamic of the torque response would be degraded and it is not suitable for electric vehicle (EV) applications. Therefore, a modification to the voltage vector as well as look-up table has been proposed in order to improve the performance of torque response.DOI: http://dx.doi.org/10.11591/ijpeds.v4i4.6918
A Novel Dynamic Overmodulation Strategy of Direct Torque Control Auzani Jidin; Tole Sutikno; Aiman Zakwan Jidin; Nik Rumzi Nik Idris; Abdul Halim Mohd Yatim
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 8, No 3: December 2010
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v8i3.629

Abstract

The direct torque control-space vector modulation (DTC-SVM) is well-known for achieving excellent dynamic overmodulation. However, the method uses complicated predictive stator flux vector control and requires high precision stator flux vector to define overmodulation mode. This paper proposes a straightforward dynamic overmodulation method and constant switching frequency controller without SVM to obtain a faster dynamic torque response in DTC for induction machines. To perform this method, the flux error status produced from the flux hysteresis comparator during dynamic condition is modified slightly before being fed to the look-up table. The verification of proposed method was performed using MATLAB/Simulink simulation package. The effects of different switching and operating condition on dynamic torque performance are analyzed. The result shows that a faster torque response is achieved in proposed dynamic overmodulation DTC method. The main benefit of the proposed method is its simplicity since only minor modification is made to the basic DTC hysteresis-based structure. 
Co-Authors Abdul Halim Mohd Yatim Aiman Zakwan Jidin Ali Monadi Auzani Jidin Goh Wee Yen Tole Sutikno