Muhammad Izuan Fahmi Romli
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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

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  • 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.
  • 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.
  • Publication
    Medium sized industrial motor solutions to mitigate the issue of high inrush starting current
    ( 2021-05-03)
    Azizan N.S.
    ;
    Azizan M.M.
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Muhammad Zaid Aihsan
    ;
    Muzammil Jusoh
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Mohd Zakimi Zakaria
    Starting of a medium or large induction motors generate such a large current during direct-on-line (DOL) starting process to the point that it can drop the voltage of power supply. The induction motor can be broken, its characteristics can be changed, and performances of the motor can be worsened. A significant higher starting current than the rated current can generate mechanical and thermal stress on the motor and the loads. High-voltage fluctuations, dips and sags can arise in electrical power systems associated with the motor. To overcome this problem, various starters were designed. There are several types of starters in which can be divided into conventional starters and power electronic drives. Conventional starters are such as direct-online, star-delta and autotransformer whereas the example for power electronics are matrix converter, frequency inverter and soft starter. In this paper, the design of autotransformer and soft starter are focused in order to compare inrush current during the start-up three phase medium sized industrial induction motor by using MATLAB/Simulink software. Both starters were targeted to resolve the problems inherent in the dynamic operation of induction motors, which included current and torque surges during the motor start up. The autotransformer gives the choice to consumer in selecting different tap values, in which is the advantage to consumer to vary their starting current and starting torque according to its application. On the other hand, the three-phase soft starter employs two anti-parallel connected switches in each phase. Thyristors act as the switches due to their higher power rating and high efficiency. Then, both methods will be compared to prove the best performance in mitigate high inrush current. The best of the two is likely to be the answer for mitigating the issue of high inrush starting current for a medium size motor at industries.
  • Publication
    Solar Powered Multiple Output Buck Converter
    ( 2020-12-18)
    Muhammad Zaid Aihsan
    ;
    Norhanisa Kimpol
    ;
    Liew Hui Fang
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Wan Azani Wan Mustafa
    ;
    Junaidah Ali Mohd Jobran
    ;
    Mohamed Mydin Hj M.Abdul Kader
    Times have certainly changed over the past few decades, now it seems that technology is getting more compact and efficient. The modern outdoor enthusiast such as hikers, climbers has a problem regarding the lack of power supply to power up electronics when they go for adventure activities. In order to solve this problem, this paper design and develop DC/DC buck converter system to drop down the voltage from the solar photovoltaic (PV) system from 12VDC into 5VDC. This paper is first to start up with design and simulation circuit using simulation to test outcome of this paper in the range of 5VDC & 1.0A and 5VDC & 0.5A. A battery storage is needed to feed electricity independent and battery management of the battery is needed to improve the performance of battery life. This can be done by adding a charge controller unit. The outcome of this paper allows the battery to be charged using the solar panel and at the same time can produce multiple outputs for low voltages used. The software simulation has been done to shows this system produces two different output and the hardware will be developed based on the software results. Software and hardware result, both will be compared and analysed.
  • Publication
    Maximum efficiency scheme using superimposed and Taguchi method wireless charging for mobile phone
    ( 2020-01-07)
    Hanif M.H.M.
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Wai C.L.
    ;
    Muhammad Zaid Aihsan
    ;
    Aminudin A.
    ;
    Zhe L.W.
    ;
    Mohamad Zhafran Zakariya
    The magnetic resonance inductive coupling energy transfer from transmitter to receiver is designed in this project through magnetic inductive coupling. The transmitter sends energy through induction to the electrical devices from the transmitter to the receiver and then stores the energy in the batteries. Because the transmitter coil has a gap with the receiver coil. This wireless charging using two methods to show the output, first using the Taguchi Method and second using Superimposed Technique. The Result shows that output voltage must high than the input voltage and the same at secondary coil because using the same number of turns. The output voltage at the voltage regulator shows the output must in 5 Volts to charging the mobile phone with high efficiency.
  • 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.
      1
  • Publication
    Performance Evaluation of Transformerless Inverter based Quadratic Boost Converter
    ( 2021-01-01)
    Muhammad Zaid Aihsan
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Liew Hui Fang
    ;
    Wan Azani Wan Mustafa
    ;
    Hasliza A Rahim @ Samsuddin
    ;
    Al-Abbooda K.S.
    This paper presents a single-phase transformerless inverter based high step-up quadratic boost converter (QBC). By removing the conventional isolation transformer in the single-phase inverter system is grants higher efficiency and reduction in size as well as cost-effectiveness. The proposed topology can generate a standard single-phase power rating of 230 Vrms from a small dc voltage. The capability of the quadratic boost converter to perform a single-stage boost operation is guaranteed before inverted to the alternating sequence of Ac voltages as the constant duty cycle and proper unipolar modulation technique are well implemented. Experimental results are presented to verify the proposed topology capability.
      1
  • Publication
    9-level Symmetrical Cascaded Switched-Diode with Artificial Bee Colony Optimizer
    ( 2021-01-01)
    Muhammad Zaid Aihsan
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Mohd Saifizi Saidon
    ;
    Wan Azani Wan Mustafa
    ;
    Liew H.F.
    ;
    Alkhayyat A.
    ;
    Majeed S.A.
    Multilevel inverters (MLIs) are power electronic circuits that is used to replace traditional two-level inverters. MLIs allow for more flexible control of the dv/dt and di/dt ratios, as well as a greater number of output levels in voltage and current in staircase waveforms. The design of a traditional multilevel inverter, on the other hand, necessitates additional power switches and has limitations in a broad variety of applications. In this paper, the new approach known as Symmetrical Cascaded Switched-Diode (SCSD) is used to form a nine-level output voltage with fewer switches and its aim to remove low-order harmonics like the 3rd, 5th, and 7th. The switching angles were determined using the Artificial Bee Colony (ABC) Optimizer method and non-linear equations obtained from the Fourier series of the output voltage and current waveform. The suggested circuit was tested with two modulation indices, modelled using PSIM software, and assessed by experimentation. THD for modulation index 0.62 is around 7.09 percent for simulation and 7.7 percent for experimental results, while modulation index 0.84 produces 4.08 percent for simulation and 4.5 percent for experimental results.
      2  1
  • 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.
      2  2
  • Publication
    Current Sensor Based on Planar Rogowski Coil
    ( 2021-01-01)
    Khalid K.A.
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Ayob Nazmy Nanyan
    ;
    Muhammad Zaid Aihsan
    ;
    Wan Azani Wan Mustafa
    ;
    Hasliza A Rahim @ Samsuddin
    ;
    Alfilh R.H.C.
    This paper discusses the design and development of current sensor based on planar Rogowski Coil. A Rogowski coil is a toroid of wire used to measure an alternating current through a cable encircled by the toroid. The aim of this study is to design and develop planar Rogowski as a sensor for current measurement and detection using printed circuit board (PCB). The problem of this project is Rogowski Coil (RC) current sensor has same principle as Current Transformer, but the design is different, especially the RC is developed in PCB. Before starting in development of Rogowski Coil current sensor, a few studies are required to review past research on related topic to develop this project. The winding of Rogowski coil current sensor is design by using design software which is EasyEDA to achieve very good sensitivity for wide bandwidth range of frequency at the lowest cost. Finally, the prototype developed is experimented to get the result. The experimental results are discussed and evaluated regarding the performance of the prototype. The highest induced voltage that detected is 55.3 mV and the lowest induced voltage is 11.1mV. The design of Rogowski sensor is significantly shown the best performance of the current sensor in term of sensitivity and bandwidth.
      1