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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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.

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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.

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Performance Analysis of a Switched-Mode Flyback DC-DC Converter with Influence of Non-Ideal Switching Devices

2023 , Shazlin Shafiqah Shamsul Kamar , Syahrul Ashikin Azmi , Zainuddin Mat Isa

This paper approach for the performance analysisof a dc-dc flyback converter for low power application. Modelling is done with parasitic components for non-ideal flyback converter. Ac and dc input characteristic of the flyback converter are analysed and investigated by PSIM simulations and calculations. The influence of parasitic effects in converter components on input characteristic is studied in continuous conduction mode (CCM).The results of the calculation based on analytical formula and averaged models are in a good accordance with PSIM simulations and calculation. The goal of this project is to compare an ideal and non-ideal condition in order to see the effect on the efficiency and ability of the converter to control the output voltage. The converter is expected to be operated in continuous conduction mode at all time and focus application islow power application that less than 100W.

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