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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Effect of concrete orientation as an enhancement material in grounding system

2020-07-09 , Hasni N.A.S. , Syahrun Nizam Md Arshad @ Hashim , Amizah Md. Ariffen , Halim N.H. , Wooi Chin Leong , Muhammad Izuan Fahmi Romli , Bakar O.A.

To achieve an excellent grounding system, an alternative solution was developed by using enhancement material to modify the soil surrounding the rod. These materials can effectively reduce soil resistivity and grounding resistance for a better grounding system. To achieve this goal, the fundamental part must be taken into account. In this study, the main objective is to analyze different concrete orientations as enhancement material in the grounding system. A 3-D orientation of concrete has been designed using Finite Element Method (FEM) software to analyze the performance of the electric field in the grounding system with different orientation of concrete. Every orientation of concrete had been clarified into four different cases which are full concrete, half concrete, three-quarter concrete, and a quarter concrete. From the result, full concrete is the best orientation of concrete design to be employed at the grounding site as it has a low electric field compared to the other concrete orientation.

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Numerical analysis of comparison highly efficient active rectifier for energy harvesting application

2023-08 , Liew Hui Fang , Diyya Hidayah Abd Rahman , Muhammad Izuan Fahmi Romli , Mohd Arif Mohd Zain , Junaidah Ali Mohd Jobran , Norhanisa Kimpol

A piezoelectric energy harvesting (PEH) circuit with a passive rectifier lack in efficiency and performance. The performance and potential of piezoelectric energy-harvesting devices depend strongly on the power conditioning circuit as the circuits are essential for managing and controlling energy flows in these energy collecting devices. In order to overcome this situation, the parallel synchronized switch harvesting on inductor (P-SSHI) and the general model of synchronized multiple bias-flip (SMBF) which are the recent implementation of parallel synchronized triple bias-flip (P-S3BF) and parallel synchronized septuple bias-flip (P-S7BF) are used for further enhancing the PEH performance. In addition, active rectifiers presented distinguished benefits over passive rectifiers, such as the ability to analyze regulation, dynamic response to load changes, output voltage ripple, input current, total harmonic distortion (THD), power factor correction, and wave factor. Furthermore, by using an active rectifier the output voltage can be boosted higher. Thus, it is more efficient than a lower voltage since it experiences less energy loss from resistance. This research investigates the several high efficiency AC-DC active rectifiers as interface circuit plays a crucial role in the energy harvesting capability enhancement in PEH systems. The research methodology is carried out on a piezoelectric structure under the same base circuit with a different type of power conditioning circuit applied to the main circuit using the LTspice software. In conclusion, the input voltage for each different active rectifier circuit were set at 3-5 V and the frequency is set based on the input voltage of the circuit. Based on the results, the P-S7BF shows the higher efficiency with voltage output will have the most efficiency with the estimated voltage output reaching up to 13 V with a net harvesting power of up to 80-90% follow up by the P-S3BF and P-SSHI. There are several recommendations to improve active circuit by investigation the impact of load variation on the efficiency, such as different loads may require different rectification techniques and control strategies to achieve high efficiency.

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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.

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Feasibility Study of Future Seaports

2021-06-11 , Nor Baizura Ahamad , Othman M. , Ernie Che Mid , Muhammad Izuan Fahmi Romli , Surina Mat Suboh , Guerrero J.M.

Port is a focal point especially in the trade sector, where it is represented as hub for the import and export from one destination to another. Despite the fact that it gives positive impact to country specifically in economic sector but from the health sector, this activity leaves a negative impact on the environment and human health, especially those living near the port. Now, most of developed countries have made improvements by converting conventional engines (diesel engines) to electrical engines for major vehicles in ports. The same goes for shore-side ports, most of them using cold ironing (CI). However, all the modification is still raw and faced several challenges, especially in technical aspects such as voltage difference, frequency, supply / demand. It occurs due to the difference in standard voltage and frequency between shore-side and ship. Most of the ocean ship used 60 Hz. In addition, the main constraint faced is that the power supplied on the shore-side is not enough to meet the demand from customers. Thus, to make additions to the existing substation, it will require high initial costs. After evaluating the pros and cons, the new approach is taken to integrate this system into microgrid technology. Microgrid technology is a local cluster energy source with a control capability comprising Energy Distribution Resources (DER), which cover management request, storage, and loads. One of the advantages of a microgrid is that they can be connected or disconnected from the grid to operate autonomously.

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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.

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PCB Rogowski coil sensor by using saw blade pattern for arcing fault detection

2023 , Kamarul Aizat Abdul Khalid , Muhammad Izuan Fahmi Romli , Ayob Nazmy Nanyan , Zul Hasrizal Bohari

Rogowski is a special current transformer and has been categorised as a low-power stand-alone current sensor. This sensor is designed by using a Saw blade pattern with 50 turns and 100 turns. This number of turns will impact the increment of the sensitivity of the sensor. Rogowski coil is used for measuring the alternating current (AC) and high-speed current pulses. The PCB Rogowski Coil will detect the arcing fault that design with AutoCAD software after that import to CST software. An arc is created when the electrical current jumps the gap between two conductive materials. The most common causes of arcs include worn contacts in electrical equipment, damage to insulation, break in a cable and loose connections. In order to reduce the arc fault risk, the arc fault interrupter (AFI) technology and arc fault detectors (AFD) have been developed. However, these devices are most suitable for domestic application or low voltage (LV). This paper proposed a simulation using AutoCAD and CST software to design a Rogowski coil and the Rogowski Coil sensor will be tested by using CST software in terms of radiation pattern. The biggest radiation pattern in red colour is the saw blade pattern in 100 turns at 2 KHz frequency, the radiation pattern covering entire sensor area compared with other radiation patterns with other frequency. The main lobe magnitude for 2 KHz frequency is 46.8 dB, main lobe direction is 180 deg, angular width is 153.4 deg and the side lobe level is zero. This is the best number of turn and frequency compared to 50 turn saw blade sensor.

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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.

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Design and business modelling of an IoT based cost-efficient solar data logger with cellular monitoring interface for decentralized renewables

2024-01 , MD Shahrukh Adnan Khan , Md Khairul Alam , Md. Masum Howlader , Abid Aziz , Md. Ashraful Kabir , Sufia Khatun , Muhammad Izuan Fahmi Romli

This paper introduces a cost-effective IoT-based 'Solar Data Logger' designed for real-time monitoring of energy storage within solar power systems. The prototype's performance is rigorously assessed, comparing both technical capabilities and cost-effectiveness against established technologies. Leveraging IoT technology, the system securely stores data in a cloud-based infrastructure while also providing a user-friendly mobile application interface for control and monitoring. Moreover, this research showcases the system's relevance in the emerging field of decentralized renewable energy generation, particularly in Building to Grid (B2G) management. Additionally, the paper offers a comprehensive business model that includes a detailed estimate of expenses for commercializing the prototype, encompassing research and development (R&D) and pilot deployment. Finally, the paper acknowledges its limitations and suggests avenues for future research and development

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Supercapacitor’s parameter calculation based on three branch equivalent circuit model under different constant charging current

2023 , Makhdoom Abdul Jabbar , Muhammad Izuan Fahmi Romli , Shamshul Bahar Yaakob , Liew Hui Fang , Md Shahrukh Adnan Khan

Supercapacitor is a type of energy storage with higher capacitance value compared to the normal capacitor. But it has lower voltage level compared to normal capacitor. However, it can be charged with high current and provide higher current to the load when needed when compared to the same size energy storage such as battery. The Three Branch Equivalent Circuit is one of the simple yet accurate model that has been proposed. The parameter of the Three Branch model included the capacitance, resistance and a unit of voltage dependent capacitance. The Parameter needed to be calculated accurately as it depends heavily on the terminal voltage of the supercapacitor at respective time which obtained through a charging and self-discharging experiment under constant current charging. The different constant charging current give effect toward the parameter calculation as it manipulates the rate of charging and self-discharging. This paper will calculate the parameter of supercapacitor based on the Three Branch model under different constant charging current and compared the result using the simulation to show the accuracy of the model. The parameter obtained throughout the study shows a high accuracy especially the parameters obtained using higher charging current.

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Characteristic Study of Supercapacitor's Discharging Process Base on BLDC Motor

2023-01-01 , Mohd Azri Abd Aziz , Mohd Saifizi Saidon , Muhammad Izuan Fahmi Romli , Siti Marhainis Othman , Wan Azani Wan Mustafa , Al-Dolaimy F. , Alkhayyat A.

Energy storage has become a key issue for achieving goals connected with increasing the efficiency of both producers and users. In particular, supercapacitors currently seem to be interesting devices for many applications because they can supply high power for a significant amount of time and can be recharged more quickly than electrochemical batteries. Supercapacitors, as similar to conventional capacitors build on two plates separated by a dielectric and an electrolyte, can store more energy than conventional capacitors because they can produce two distinct layers of separated charges between plates, which are typically made of porous, carbon-based materials. The supercapacitors module serves as the power supply for the discharging process as called Energy Storages (ES). The main purpose of this research is to investigate the behaviour and properties of discharged supercapacitors. The design is created using Simulink and includes a circuit schematic and scope label. Using Brushless Direct Current Motor (BLDCM) as a load, study proposed steady state condition and dynamic state condition of BLDCM operation are investigated. With comparison to battery, preliminary finding state that value of SoC and voltage of battery higher but value of current less than supercapacitor in a certain amount of time.

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