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

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  • 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.
  • 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.
  • Publication
    A Dragonfly Algorithm Application: Optimizing Solar Cell Single Diode Model Parameters
    ( 2020-01-07)
    Zainuddin Mat Isa
    ;
    Norkharziana Mohd Nayan
    ;
    Nor Ashbahani Mohamad Kajaan
    ;
    Mohd Hafiz Arshad
    This paper provides an overview of optimizing solar cell single diode parameters using Dragonfly Algorithm. The 57 mm diameter commercial (R.T.C. France) silicon solar cell measurement data are taking as the data source for the optimization process. The results produced are compared with NM-PSO and IJAYA algorithms to observe the efficiency, accuracy and reliability of the proposed approach.
  • Publication
    THD analysis for symmetrical five level and seven level cascaded multilevel inverter
    ( 2020-01-07)
    Kaja Mohideen
    ;
    Nor Ashbahani Mohamad Kajaan
    ;
    Zainuddin Mat Isa
    ;
    Norkharziana Mohd Nayan
    ;
    Mohd Hafiz Arshad
    ;
    Saidatul Shema Saad
    Total Harmonic Distortion (THD) is one of the problems in the multilevel inverter. This paper discussed a brief review of THD in different cascaded H-bridge multilevel inverter topologies of five levels and seven levels at the output waveforms. The five levels inverter contains eight switches while seven levels inverter used twelve switches. Each single H-bridge inverter circuit is fed by equally independent DC source for both inverters. The inverter uses MOSFET as the switching point and acts as the controller for a fundamental switching operation. The switching value has been set at the gating block to control the operation of the MOSFET switching. Several waveforms and simulation findings are provided to validate the quality of the proposed topology.
  • 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.