Zainuddin Mat Isa
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Zainuddin Mat Isa
Official Name
Zainuddin, Mat Isa
Alternative Name
Isa, Z. M.
Mat Isa, Zainuddin
Isa, Zainuddin Mat
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Scopus Author ID
36104327400
Researcher ID
E-5613-2011

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  • Publication
    Comparative Study of Multiphase 5-Level Cascaded H-Bridge Multilevel Inverter System
    ( 2022-01-01)
    Zawawi M.N.M.
    ;
    Zainuddin Mat Isa
    ;
    Mohd Hafiz Arshad
    ;
    Baharuddin Ismail
    ;
    Talib M.H.N.
    In terms of cost and structural design, the cascaded H-bridge multilevel inverter (CHBMLI) has a significant advantage over diode clamped and capacitor clamped multilevel inverters. The total harmonic distortion (THD) of a 5-level CHBMLI system for three different phases (single-phase, three-phase, and six-phase system) is studied and compared in this work. As switching angles play a role in lowering THD, the switching angles for a 5-level CHBMLI are evaluated using four specific switching angle methods in the initial section of this paper. In the simulation of single-phase system, these angles are being utilized. The angles with the lowest THD value are chosen for three-phase and six-phase system simulation. Based on the findings, the higher phase of 5-level CHBMLI is more efficient in decreasing harmonics.
  • Publication
    Harmonics elimination of reduced switch multilevel inverter using henry gas solubility optimization algorithm
    (Iran University of Science and Technology, 2025-06)
    Zainuddin Mat Isa
    ;
    Baharuddin Ismail
    ;
    Mohd Hafiz Arshad
    ;
    Ernie Che Mid
    This study introduces a pioneering method to enhance the efficiency and effectiveness of three-phase five-level reduced switch cascaded H-bridge multilevel inverters (CHB MLI) by employing the Henry Gas Solubility Optimization (HGSO) algorithm. Targeting the selective harmonic elimination (SHE) technique, the research emphasizes the optimization of switching angles to significantly reduce total harmonic distortion (THD) and align the fundamental output voltage closely with the reference voltage. Central to this exploration are three distinct objective functions (OFs), meticulously designed to assess the HGSO algorithm’s performance across various modulation indices. Simulation results, facilitated by PSIM software, illustrate the impactful role these objective functions play in the optimization process. OF1 demonstrated a superior ability in generating low OF values and maintaining a consistent match between reference and fundamental voltages across the modulation index spectrum. Regarding the reduction of THD, it is crucial to emphasize that all OFs can identify the most effective switching angle to minimize THD and eliminate the fifth harmonic to a level below 0.1%. The findings highlight the potential of HGSO in solving complex optimization challenges within power electronics, offering a novel pathway for advancing modulation strategies in CHB MLIs and contributing to the development of more efficient, reliable, and compact power conversion systems.
  • Publication
    Comparative Analysis of 5-level Multilevel Inverter with Reduced Switched Topology
    ( 2022-01-01)
    Arshad M.H.
    ;
    Baharuddin Ismail
    ;
    Muhammad Zaid Aihsan
    ;
    Zainuddin Mat Isa
    ;
    Siti Khodijah Mazalan
    A new topology for the single phase 5-level multilevel inverter is proposed in this paper. Using multiple semiconductor switches and lower-level DC voltages as input, a multilevel inverter generates more than two voltage levels to achieve high efficiency, smoother, and less distorted alternating voltage. The conventional 5-level multilevel inverter requires 8 switches in configurations of two cascaded H-bridge resulting in cost addition as well in generating more losses in the circuit. The proposed topology offers the same 5-level output voltage with lesser power switches resulting in cost-effectiveness as well as improve the circuit complexity. The proposed topology is simulated using PowerSim software to testify its functionality, performance, and validation. A comparative of harmonic distortion between the conventional and the proposed topology is reported.
      28  4
  • Publication
    Multiple switching pattern for a modified reduce switch multilevel inverter: A comparison analysis
    ( 2020-01-07)
    Mohd Hafiz Arshad
    ;
    Siti Khodijah Mazalan
    ;
    Nor Ashbahani Mohamad Kajaan
    ;
    Norkharziana Mohd Nayan
    ;
    Zainuddin Mat Isa
    ;
    Baharuddin Ismail
    ;
    Izati Abdullah N.
    A primary concern of multilevel inverter is its capability to produce desired alternating voltage close to sinusoidal at the output, using multiple sources of DC voltage input. Mostly a multilevel inverter is used to generate the AC voltage from DC voltage. The aim of this paper is to investigate the output of 9 level multilevel inverter by modifying the conventional 5 levels H-bridge cascade multilevel inverter. The proposed design intending to reduce the number of switches from 16 switches to 10 switches. Implementation of different switching pattern methods; equal phase (EP), half equal phase (HEP), half height (HH) and feed forward (FF) and the related expression are presented in this paper. In the result section shows a different percentage of total harmonic distortion achieved. Out of all 4 methods, HH method suppressed distortion wave the most and resulted in the lowest THD in the proposed inverter. This paper shows that by reducing the number of switches in multilevel inverter structure maintains the same quality output as the conventional H-bridge topology. Furthermore, the manipulation of the switches firing angle contribute in decreasing the system THD.
      2  41