Nurhakimah Mohd Mukhtar
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Preferred name
Nurhakimah Mohd Mukhtar
Official Name
Nurhakimah, Mohd Mukhtar
Alternative Name
Mukhtar, Nurhakimah Mohd
Mokhtar, Nurhakimah Mohd
Mokhtar, N. M.
Mukhtar, Nurhakimah M.
Mukhtar, N. M.
Mohd Mukhtar, Nurhakimah
Mohd Mukhtar, N.
Main Affiliation
Scopus Author ID
55561855200

Research Output

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  • Publication
    Varying the energisation condition to mitigate sympathetic inrush current
    ( 2023-12-01)
    Nadhirah N.F.
    ;
    Hana Abdull Halim
    ;
    Nurhakimah Mohd Mukhtar
    ;
    Samila Mat Zali
    Transformers are generally easy to access and can contribute significantly to entire power system. When a transformer is turned on for the first time, it produces a magnetising inrush current which acts as a starting current. Energisation of transformer has a substantial impact on inrush current and transformer that are connected in parallel. Sympathetic inrush current is a phenomenon that appears when a transformer is switched-on in network whereas the other transformers that was earlier energised. Besides, when sympathetic inrush phenomena occur, the peak and period fluctuate significantly. In this paper, the transformers will be energised in three different ways and each condition will be explored in depth. The operation time of the transformer’s energisation whether it is energised simultaneously or at different times are tested and analysed in terms of their characteristics. It is performed using power system computer aided design (PSCAD) software, starting with a develop model of the energisation and then generate the outcomes. The results of the simulation demonstrate that energising the transformer in different ways can give different effect on the sympathetic inrush current, as well as the variables that affect it and methods for reducing it
  • Publication
    A Comprehensive Study on Magnetic Materials Selection for Power Electronic Converters
    ( 2023-01-01)
    Rahman M.Z.
    ;
    Nurhakimah Mohd Mukhtar
    The size and efficiency of converters are key considerations to ensure optimal power management across electrical networks, which significantly affect industrial, aeronautical, and automobile use. Frequently, the converter's most important component is the inductor. The appropriate inductor can eliminate the current ripple at the converter's input. Therefore, choosing the right component is crucial for a converter design. The operating frequency range of power converters is selected from 20 kHz to 150 kHz. Whenever the switching frequency is raised from 20 to 150 kHz, the converter volume shrinks by 59.5% and weight is lowered by 58.4%. This study compares the magnetic materials utilized in a realistic design. Iron-based amorphous metals, nanocrystalline, alloy-powdered, silicon steel and ferrite materials are among the substances under this research. The type of converters, magnetic materials, features and their shape selection are discussed. Finally, based on some prior research, we proposed that powdered material cores are the best choice for power electronic converters.