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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Bulletin of Electrical Engineering and Informatics
Mohd Hatta Jopri
Universiti Teknikal Malaysia Melaka (UTeM)
Control & Systems Engineering Electrical & Electronics Engineering

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Improved Torque Control Performance of Direct Torque Control for 5-Phase Induction Machine Logan Raj Lourdes Victor Raj; Auzani Jidin; Kasrul Abdul Karim; Tole Sutikno; R. Sundram; Mohd Hatta Jopri
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 3, No 4: December 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In this paper, the control of five-phase induction machine using Direct Torque Control (DTC) is presented. The general D-Q model of five-phase induction machine is discussed. The de-coupled control of stator flux and electromagnetic torque based on hysteresis controller similar to conventional DTC is applied to maintain the simplicity of the system. Three sets of look-up tables consist of voltage vectors with different amplitude that selects the  most optimal voltage vectors according motor operation condition is proposed. This provides excellent torque dynamic control, reduces torque ripple, lower switching frequency (high efficiency) and extension of constant torque. Simulation results validate the improvement achieved.DOI: http://dx.doi.org/10.11591/ijpeds.v3i4.5249
Estimation of hourly solar irradiation on tilted surfaces Aleksey Belsky; Dmitry Glukhanich; Tole Sutikno; Mohd Hatta Jopri
Bulletin of Electrical Engineering and Informatics Vol 12, No 6: December 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v12i6.6513

Abstract

Tilted photovoltaic panel (PVP) are extensively utilized in solar power installations. To model and design them, you must understand the solar irradiation on a tilted surface over time scales of an hour, day, week, month, or other period. However, most  meteorological stations only record global horizontal irradiance (GHI). In this research, a method is proposed for translating hourly worldwide horizontal irradiation from the NASA POWER database into hourly global sun irradiation on a tilted surface utilizing regression analysis methods and numerical modeling methods based on an isotropic model of solar irradiation. In addition, this work proposes a method for establishing the regression reliance of the diffuse transmittance index on the  clearness index for geographic areas where this relationship has not yet been empirically proven. To assess effectiveness, the results of the proposed technique and other authors' methods are compared with monthly average NASA POWER climatological data using evaluation methods such as mean bias error (MBE), mean absolute bias error (MABE), and root-mean-square error (RMSE). The study's findings can be used to construct, optimize, or anticipate the functioning of solar power facilities at any angle of tilt and in any geographic area.
Co-Authors Aleksey Belsky Auzani Jidin Dmitry Glukhanich Kasrul Abdul Karim Logan Raj Lourdes Victor Raj R. Sundram Tole Sutikno