Shamshul Bahar Yaakob
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Preferred name
Shamshul Bahar Yaakob
Official Name
Shamshul Bahar, Yaakob
Alternative Name
Yaakob, Shamsul Bahar
Yaakob, Shamshul B.
Bahar Yaakob, Shamshul
Yaakob, Sb
Yaakob, S. B.
Yaakob, Shamshul Bahar
Main Affiliation
Scopus Author ID
24825943100
Researcher ID
EDU-6433-2022

Research Output
Now showing 1 - 2 of 2
  • Publication
    Supercapacitor’s parameter calculation based on three branch equivalent circuit model under different constant charging current
    (IOP Publishing, 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.
  • Publication
    Improvement of based sector and comparison speed and electromagnetic torque of direct torque control
    (Semarak Ilmu Publishing, 2024-08)
    Muhamad Akmal Aazmi
    ;
    Shamshul Bahar Yaakob
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Muhammad Zaid Aihsan
    Direct torque control is one type of vector control used to operate an induction motor. Efficient control rules for induction motor drives offer a great chance to save energy. In comparison to DC batteries, supercapacitor (SC) technology is commonly recognised as one of the most promising and energy-efficient technologies for next-generation energy storage systems. Rotating equipment generates vibration, which causes rotor dynamic. Battery applications also provide high torque current for induction motor start-up. The goal of these investigations and analyses is to improve the performance of the electrical device system for six sector and twelve sector direct torque control methods employing DC battery and supercapacitor. The direct torque control model is separated into seven sections: input energy storage, voltage source inverter, flux and torque estimate, sector detection, flux and torque controller, vector selection table, and induction motor. The paper focuses on the improvement of based sector for six sector and twelve sector technique of induction motor in MATLAB/Simulink simulation framework by employing different energy storage (supercapacitor and DC battery). The output of the system designed in MATLAB Simulink has been examined in terms of rotor speed and electromagnetic torque. In terms of rotor speed, the twelve-sector approach requires 0.04 second speed transition to reach steady state response, but the six-sector method requires 0.06 second when a load disturbance is added for DC battery and supercapacitor. When compared to the six-sector approach for DC battery and supercapacitor, the electromagnetic torque that employs the twelve-sector method provides more smoothly following the load torque. When a load disturbance is applied, the electromagnetic torque in the twelve-sector approach produces a spiky torque of around 15.5N, whereas the electromagnetic torque in the six-sector method produces 18N. In terms of electromagnetic torque, the usage of a supercapacitor generates 15N, whereas the use of a battery provides around 50N for the six sector and twelve sector methods.