Nik Rumzi Nik Idris

Publications (39) View all

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  Available from: Nik Rumzi Nik Idris

  Article: A Simple Approach of Space-vector Pulse Width Modulation Realization Based on Field Programmable Gate Array

  Tole Sutikno, Wong Jenn Hwa, Auzani Jidin, Nik Rumzi Nik Idris
  Electric Power Components and Systems 11/2010; 38(14):1546-1557. · 0.68 Impact Factor
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  Available from: Nik Rumzi Nik Idris

  Article: A Novel Dynamic Overmodulation Strategy of Direct Torque Control

  Jidin Auzani, Sutikno Tole, Aiman Zakwan Jidin, Nik Rumzi Nik Idris, Abdul Halim Mohd Yatim
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  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, 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.
  TELKOMNIKA. 01/2010;
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  Available from: Abdul Halim Yatim

  Conference Proceeding: A wide-speed high torque capability utilizing overmodulation strategy for direct torque control of induction machines

  A. Jidin, N.R.N. Idris, A.H.M. Yatim, M.E. Elbuluk
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  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 is 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.
  Energy Conversion Congress and Exposition, 2009. ECCE 2009. IEEE; 10/2009
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  Available from: Nik Rumzi Nik Idris

  Conference Proceeding: Improved torque capability through overmodulation for Direct Torque Control hysteresis-based induction machines

  A. Jidin, N.R.N. Idris, A.H.M. Yatim
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  ABSTRACT: This paper presents a simple overmodulation method employed in direct torque control (DTC) hysteresis-based structure. The overmodulation method is utilized to obtain higher torque capability for a wider range of speed operation. The proposed overmodulation strategy is based on the control of stator flux vector. It is shown that the switching pattern of the voltage vector in the overmodulation mode can be established by changing the stator flux locus from circular to the hexagonal shape. The main benefit in the proposed strategy is its simplicity and it can be well-implemented in many electric drive applications to obtain maximum torque capability for a wider speed range operation.
  Power Engineering Conference, 2008. AUPEC '08. Australasian Universities; 01/2009
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  Available from: Nik Rumzi Nik Idris

  Conference Proceeding: A quick dynamic torque control for direct torque control hysterisis-based induction machines

  A. Jidin, N.R.N. Idris, A.H.M. Yatim
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  ABSTRACT: This paper presents a simple dynamic over modulation method to obtain a quick dynamic torque response in DTC hysteresis-based system. The fastest dynamic torque response is achieved through the proposed dynamic over modulation method by applying only single appropriate voltage vector that produces the largest tangential flux component during transient condition. In this way, the flux error status produced from the flux hysteresis comparator is modified before it is being fed into the look-up table in order to perform the dynamic over modulation mode. The effectiveness of the proposed dynamic over modulation to obtain the fastest torque response is described with some simulation results given.
  Power and Energy Conference, 2008. PECon 2008. IEEE 2nd International; 01/2009