Muhammad Izuan Fahmi Romli
Thumbnail Image
Preferred name
Muhammad Izuan Fahmi Romli
Official Name
Muhammad Izuan Fahmi, Romli
Alternative Name
Fahmi, M. I.
Izuan Fahmi Romli, Muhammad
Fahmi, Muhamad Izuan
Fahmi, M. Izuan
Romli, Muhamad Izuan Fahim
Fahmi, Muhammad Izuan
Romli, Muhammad Izuan Fahmi
Main Affiliation
Scopus Author ID
56600298900
Researcher ID
AAB-1896-2020

Research Output

Filters

12
12
Reset filters

Settings
Now showing 1 - 10 of 12
Thumbnail Image
Publication

Design and Simulation of High Gain DC-DC Boost Converter System for PV Application

2021-01-01 , Mohd Muqri Syahmi Sulong , Mohd Saifizi Saidon , Muhammad Izuan Fahmi Romli , Wan Azani Wan Mustafa , Aihsan M.Z. , Hasliza A Rahim @ Samsuddin , Habelalmateen M.I.

Solar power plays a vital role in renewable energy systems as it is clean, sustainable, pollution-free energy, as well as increasing electricity costs which lead to high demands among customers. The main purpose of this paper is to develop an approach to designing a DC-DC boost converter for a standalone connected photovoltaic system with constant output voltage. A controller system DC-DC boost converter is designed to minimise losses and maintain at a particular value. The converter can increase a fluctuating voltage of the solar panel to an increased constant DC voltage. It uses voltage feedback to maintain constant output voltage. The controller is therefore designed as the heart of the closed loop system and offers pulse-width-modulation signal for control of the power electronic device in a boost converter. The boost converter can direct connection to the photovoltaic system grid-connected inverter. Simulations to describe the design proposed have been performed. Simulation work with the designed 75V output voltage boost converter in continuous driving mode was carried out. The test results show that the design proposed is successful.

View
Thumbnail Image
Publication

Comparative investigations on different types of inductors in single-phase inverter

2021-12-01 , Muhammad Zaid Aihsan , Ahmad Muhyiddin Yusof , Hasliza A Rahim @ Samsuddin , Baharuddin Ismail , Wan Azani Wan Mustafa , Mohd Saifizi Saidon , Muhammad Izuan Fahmi Romli

This article organized in two sections where it compares the performance of single-phase inverters using various types of inductors with differences modulation technique of pulse width modulation (PWM). Not all inductors perform the same function, even the inductance value is the same. The study will investigate the capability of each inductor on its performance to convert the unfiltered AC voltage into filtered sinusoidal AC voltage. The drum core and toroidal core inductors were used in this investigation. For both inductors, the performance will be analyzed based on Bipolar and Unipolar switching schemes in a single unit H-bridge circuit. The validation of results are through experimental assessment only and it will be evaluating the shape of sinusoidal AC voltage and the content of total harmonics distortion in the AC voltage for both inductors.

View
Thumbnail Image
Publication

Investigation and Performance Analysis of DC-DC Boost Converter System

2021-01-01 , Mohd Muqri Syahmi Sulong , Mohd Saifizi Saidon , Muhammad Izuan Fahmi Romli , Wan Azani Wan Mustafa , Muhammad Zaid Aihsan , Hasliza A Rahim @ Samsuddin , Habelalmateen M.I.

This paper presents the analysis of a closed loop DC-DC boost converter for renewable energy applications such as PV. Most of renewable energy resources produce DC voltage that implied with DC-DC converters to convert their input voltage into a higher or lower voltage level accordingly to their application. However, there are numerous types of devices or applications that used renewable energy. Thus, it means the evolution of using a closed loop boost converter system must occur. The closed-loop system DC-DC boost converter is used to step up the low-level DC voltage to a high level of DC voltage. By varying the input voltage, the performance of boost converter in terms of its output voltage can be obtained and analysed. Several studies were conducted and validated with hardware implementation. All the results are recorded and show that various levels of input voltage can be converted into a fixed value of output voltage by using this converter. To emphasise, the boost converter generated 73.33 V output when an input voltage of 12 V. Whereas this experiment is conducted to analyse the boost converter performance so that can consider if this converter is compatible with the IR dryer system.

View
Thumbnail Image
Publication

Direct torque control of induction motor with different energy storage for electrical vehicle (EV) application

2021-12-01 , Aazmi M.A. , Muhammad Izuan Fahmi Romli , Muhammad Zaid Aihsan , Liew Hui Fang , Mohd Saifizi Saidon

Energy demand worldwide is rising at an unprecedented pace. This has already shown its impact on the depletion of energy sources and environmental issues (global warming and the weakening of the ozone layer). This growing pattern of energy insufficiency will, of course, intensify in the future. Referring to the literature, significant energy savings can be achieved by controlling the speed of the electric motor system using variable frequency drives (VFDs). Efficient control of induction motor drives provides an excellent opportunity for energy savings. As a result, research into the optimal operation of induction motor drives is escalating and mainly focuses on the Direct Torque Control (DTC) control technique on improving the dynamic operation of torque control. However, the study on the type of energies on improving the dynamic response is least reported. This paper will study the effect of different energy supplies on the dynamic response of torque performance. The standard DC battery and supercapacitor will be used to energize the induction motor through the three-phase inverter and controlled with the DTC control scheme. The results are validated through MATLAB Simulink and it shows the supercapacitor has the better dynamic response in torque response compared to the standard DC battery. The comparative results are presented in a proper mannered way.

View
Thumbnail Image
Publication

Design Three Phase Inverter for Compressor Drive using Single-Phase AC Source

2021-01-01 , Faudzi M.A.F.M. , Mohd Saifizi Saidon , Mohd Z. , Aziz A.A. , Muhammad Izuan Fahmi Romli , Wan Azani Wan Mustafa , Alkhayyat A. , Abdulsattar A.M.

Inverters are commonly used in high power applications for induction motors, air conditioners, and ventilation fans. The use of an inverter can save electricity consumption and maximize consumption on the compressor. The compressor runs slowly at night, when there is little or no activity with the refrigerator. It uses just the correct amount of energy to keep the refrigerator at the right temperature. This is where the energy efficiency comes into play, and it may save you anywhere from 20% to 30% on your electric bill. The purpose of this project is to design a three-phase inverter for use on refrigerator compressors. The focus of this project is to generate and analyze the performance of a three-phase AC voltage that will be connected to the refrigerator compressor to produce a maximum voltage of 220 V that gets the current supply from the socket. In this project, a three-phase inverter is simulated using MATLAB/SIMULINK software. At the end of the project, a three-phase inverter successfully produced three-phase voltage and run for load.

View
Thumbnail Image
Publication

Review Article: Voltage Balancing Method for Battery and Supercapacitor

2023-02-01 , Nordin N.N.S. , Muhammad Izuan Fahmi Romli , Liew Hui Fang , Muhammad Zaid Aihsan , Mohd Saifizi Saidon

This paper examines several existing voltage equalizers techniques for energy storage system, with a focusing on batteries and supercapacitors. Due satisfy the demands, energy storage cells are often coupled in series/parallel. However, divergence of voltage distributed among cells produces the problems of voltage imbalance that affecting the ageing of energy storage system and solved through equalizers. Several assessments from features of topologies in voltage balancing circuit supplied primarily based total on a few attentions’ just like the effectiveness in balance and components. Voltage balancing is essentially separated into two categories: passive and active equalizers. Therefore, this paper studied and reviewed several topologies from both equalizer types with the sample result to verify the topology performance.

View
Thumbnail Image
Publication

A review on VFD Control and Energy Management System of Induction Motor for Electric Vehicle

2021-01-01 , Muhamad Akmal Aazmi , Muhammad Izuan Fahmi Romli , Muhammad Zaid Aihsan , Liew Hui Fang , Mohd Saifizi Saidon

This growing pattern of energy insufficiency will, of course, intensify in the future. According to the literature, variable frequency drives can save a lot of energy by changing the speed of the electrical motor mechanism (VFDs). The aim of these studies and analyses is to improve the efficiency of the electrical device system by using VFD control techniques. This paper outlines the principle of control mechanisms for induction motor drives, as well as their benefits and drawbacks. This paper is intended to serve as a one-stop shop for researchers interested in the topic. However, there appears to be no comprehensive review of Variable Frequency Drive (VFD) techniques for induction motor (IM) drives to resolve the need for a detailed insight into IM drives. Efficient control policies for induction motor drives provide a great opportunity for energy savings. As a result, research into the optimal operation of induction motor drives is escalating.

View
Thumbnail Image
Publication

Total Harmonic Distortion Comparison Analysis between High-Power Density Inverter and Multilevel Inverter

2021-01-01 , Khalid K.A. , Muhammad Izuan Fahmi Romli , Liew Hui Fang , Muhammad Zaid Aihsan , Mohd Saifizi Saidon

The inverter is one of the most common things in converting electrical energy supply and it is a very important concept in the current modern electrical power system to utilize the maximum potential by generating the unit while considering the environment within the surrounding area and avoid pollution is the most ideal concept of energy management. The main purpose of this study is to consider which one of the inverters is more suitable for energy saving. There are two kinds of inverter that have been tested for this research which are the High-power density inverter (HPDI) and Multilevel inverter (MLI). In High-power density inverter (HPDI) it uses electrical components such as Insulated-gate Bipolar Transistor (IGBT) as the main component. As for the Multilevel inverter (MLI) it uses electrical components Metal- oxide-semiconductor field-effect-transistor (MOSFET) as the main component. Both inverters are being implemented and running by using MATLAB Simulink software. Besides that, the result is obtained by comparing the Total Harmonic Distortion (THD), the output of the waveform and energy efficiency for both inverters.

View
Thumbnail Image
Publication

Piezoelectric Array Configuration Technique into Enhance Power Catchment for Sound Energy Harvester System

2020-11-18 , Liew Hui Fang , Rosemizi Abd Rahim , Muhammad Izuan Fahmi Romli , Mohamad Zhafran Zakariya , Junaidah Ali Mohd Jobran , Norhanisa Kimpol

The objective of this study is to explore the harvest maximum output changes occurs in piezoelectric transducer when connected in different configuration to produce highest electricity consumption and generate sound energy harvesting system. Acoustic energy is a type of environmental energy source that can be extracted and converted into electrical energy for small-scale energy applications. In this study, the corresponding load resistance for single piezoelectric transducer is 4.5 k$\Omega$, together with a constant vibration source at a frequency of 68 Hz and a 1-g acceleration. The performance of output voltage and power of piezoelectric are evaluated and the optimum output is measured by depending on the connection of the piezoelectric transducer arrangement into series, parallel and series, and parallel which stimulated using Proteus software. The experiment result presented that, when have single piezo, 5 piezo connected in series, and 5 piezo connected in parallel, the output powers are 1.664 mW, 1.671mW and 7.676 mW, respectively. During the combination series and parallel connections, the output power of 3S1P piezo increases to 5.05mW. In a parallel configuration, the output voltage that produced is much higher than a piezoelectric transducer arrangement connected in series connection. The piezoelectric transducer that connected in parallel configurations increases its voltage output from 2.83 V to 13.05 V with the same polarity. The arrangement of piezoelectric transducer in parallel configuration is affordable, with its higher production of a higher power output compared to the arrangement of piezoelectric transducer in series connection. Whereas in terms of power output, the maximum power remains constant in the range of 1.665 to 1.671 mW when three transducers are in series configuration connection with the same polarity. In conclusion, the proper implementation of the piezoelectric array configuration is needed in order to operate the minimum energy for low load devices and promise to accomplish generated optimum power output in harvester system.

View
Thumbnail Image
Publication

A Simple Method for Characterization Supercapacitor using Constant Current Charging

2023-01-01 , Nordin N.N.S. , Muhammad Izuan Fahmi Romli , Liew H.F. , Jabbar M.A. , Wan Azani Wan Mustafa , Alkhayyat A.

Supercapacitors are high-energy electrochemical capacitors with high power density, long cycling life, fast charge-discharge response, and greater capacitance. In this paper, a new result using voltage measurement full charging for supercapacitors using the constant current charging method is presented. The detailed test procedure for 188 farads of supercapacitors manufactured by Eaton was observed in the laboratory to develop a dynamic model of a supercapacitor under a constant charging current of 6A. The model includes R-C branches built with a consideration of linear and nonlinear factors, variation temperature and effects of leakage current. The experiment was conducted with simple laboratory equipment like a constant current supply, voltage data logger and computer. The computational time required for the parameter calculation is by applying parameter identification modelling techniques tools in MATLAB/Simulink. Results were verified by analysis of comparison experimental with a simulation of the derived equivalent circuit. The longest respond time charging during the 42 V.

View