Sharulnizam Mohd Mukhtar
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Sharulnizam Mohd Mukhtar
Official Name
Sharulnizam, Mohd Mukhtar
Alternative Name
Mukhtar, Sharulnizam Mohd
Mukhtar, S.M.
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Scopus Author ID
36988118300

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  • Publication
    Development of a microcontroller-based inverter for photovoltaic application
    ( 2011)
    Sharulnizam Mohd Mukhtar
    Presented in this thesis is the development of a microcontroller-based inverter for photovoltaic systems. A single 8-bit microcontroller generated switching pulses for both stages of the inverter’s dc-dc converter and dc-ac inverter. A simple, effective algorithm suitable for implementation in a single 8051 microcontroller was developed, for control of the inverter’s power stage. The thesis explained details on the PWM and the SPWM switching strategies including calculation to presents their switching pulse widths. An inverter of 500W capacity was built to test the switching pulse generated by the microcontroller. A high frequency (HF) planar transformer raised input voltage to the inverter’s required level and provided isolation and solving difficulties in producing a handmade conventional HF transformer. The experiment were conducted in laboratory environment, where input voltage was taken from DC power supply and the inverter load was purely resistive. The prototype’s performance analysis results were found to be similar to those calculated. The prototype inverter performed well that able to produce a stable 240V output voltage at 50Hz, able to handle loads up to 500W, and had a low THD.
  • Publication
    Temperature analysis of single busbar with variation of total harmonic distortion in current
    (Semarak Ilmu Publishing, 2025-11)
    Mohd Wafiuddin Yahya
    ;
    Baharuddin Ismail
    ;
    Afifah Shuhada Rosmi
    ;
    Muhammad Mokhzaini Azizan
    ;
    Chanuri Charin
    ;
    Muhamad Hafiz Ab Aziz
    ;
    Sharulnizam Mohd Mukhtar
    ;
    Yazhar Yatim
    Typically, busbars are used to transmit and distribute currents in a bus duct system. The alarming use of nonlinear loads in the industrial sector or at residentials, such as arc welding, computers, ballast lighting, variable speed drives, and so on, has resulted in the generation of harmonics in current distortion, which are uncontrolled and thus increase heat generation within the system. The research conducted in this paper focuses on the prediction of the heat distribution as well as the analysis on operating temperature of a single busbar with compliance to the British National and International Standard (BS 159: 2014) using the Finite Element Method (FEM) in COMSOL Multiphysics software. The copper busbar dimension used for this research was 20mm x 6mm x 300mm, and the fundamental Root Mean Square (RMS) current was 419.1 A. The size of this busbars can withstand the maximum current of 430 A at a maximum operating temperature of 90°C, which complies with the standard requirement. The fundamental current is injected with variation of total harmonic distortion in current up to 55% with an interval of 5%. According to the findings, the operating temperature increases in direct proportion to the increase in total harmonic distortion with the current injections. With the presence of 55% of total harmonics in the current, the current was increased up to 57.73 A from the fundamental current, while the operating temperature was increased up to 140C from the fundamental temperature. The total harmonics in current produced by the nonlinear loads could affect the operating temperature of the busbars, and this continuous operation of current flow will affect the busbars' lifespan due to the occurrence of overheating.