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All Journal International Journal of Electrical and Computer Engineering International Journal of Power Electronics and Drive Systems (IJPEDS) Perfecting a Video Game with Game Metrics Bulletin of Electrical Engineering and Informatics JURNAL NASIONAL TEKNIK ELEKTRO Proceeding of the Electrical Engineering Computer Science and Informatics Indonesian Journal of Electrical Engineering and Computer Science

Auzani Jidin

Universiti Teknikal Malaysia Melaka

Author-ID : 2379036

Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering

Published : 42 Documents Claim Missing Document

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Modified Look-Up Table for Enhancement of Torque Response in Direct Torque Controlled Induction Machine Goh Wee Yen; Nik Rumzi Nik Idris; Auzani Jidin; Tole Sutikno
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 8, No 2: June 2017
Publisher : Institute of Advanced Engineering and Science

Basically, the direct torque control (DTC) drive system is operated at light load. At light load, supplying the drive system with rated flux will decrease the efficiency of the system. To maximize the efficiency of drive system, an optimal flux has been applied during steady-state but when a torque is suddenly needed, for example during acceleration, the dynamic of the torque response would be degraded. Therefore, a modification to the voltage vector as well as look-up table has been proposed for the torque response improvement. The proposed voltage vector is generated by adding two adjacent conventional voltage vectors and implemented by using duty ratio. The duty ratio is used to estimate the activation time of each conventional voltage vector in order to produce the proposed voltage vector.

Torque ripple minimization in direct torque control at low-speed operation using alternate switching technique Muhammad Zaid Aihsan; Auzani Jidin; Azrita Alias; Siti Azura Ahmad Tarusan; Zuraidi Md Tahir; Tole Sutikno
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 13, No 1: March 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v13.i1.pp631-642

Direct torque control (DTC) of induction motor is prominent to offer instant torque and flux control with a simple control structure. However, this scheme suffers from two major drawbacks namely high torque ripple and variable switching frequency of the inverter, especially during low-speed operation. During the low-speed condition, the positive torque slope is very steep and torque overshoot occurs frequently resulting in the torque ripple become of great significance. This paper proposes a new and effective technique to reduce the torque ripple by integrating the alternate switching technique to the inverter switching status to limit the torque slope surge. By varying the frequency and duty cycle of the alternate switching, the rate of surge can be controlled resulting in the chances of overshoots, and selection of reverse voltage vector can be avoided. The feasibility of the proposed technique has been validated using MATLAB/Simulink software and through experimental results. The results show the proposed alternate switching technique minimizes over 40% reduction in the torque ripple while maintaining the simple structure of DTC.

Reduction of total harmonic distortion of three-phase inverter using alternate switching strategy Nur Arifah Ramli; Auzani Jidin; Zulhani Rasin; Tole Sutikno
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 12, No 3: September 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v12.i3.pp1598-1608

Alternating current (AC) electrical drives mainly require smaller current (or torque) ripples and lower total harmonic distortion (THD) of voltage for excellent drive performances. Normally, in practice, to achieve these requirements, the inverter needs to be operated at high switching frequency. By operating at high switching frequency, the size of filter can be reduced. However, the inverter which oftenly employs insulated gate bipolar transistor (IGBT) for high power applications cannot be operated at high switching frequency. This is because, the IGBT switching frequency cannot be operated above 50 kHz due to its thermal restrictions. This paper proposes an alternate switching strategy to enable the use of IGBT for operating the inverter at high switching frequency to improve THD performances. In this strategy, each IGBT in a group of switches in the modified inverter circuit will operate the switching frequency at one-fourth of the inverter switching frequency. The alternate switching is implemented using simple analog and digital integrated circuits.

Switched Reluctance Motor Initial Design for Electric Vehicle using RMxprt Kasrul Abdul Karim; Nurfaezah Abdullah; Auzani Jidin; Tole Sutikno
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 8, No 3: September 2017
Publisher : Institute of Advanced Engineering and Science

This paper presents a design and development of 8/6 switched reluctance motor for small electric vehicle using analytical method. The absent of permanent magnet, inherent fault tolerance capabilities, simple and robust construction make this motor become more attractive for small electric vehicle application such as electric scooter and go-kart. The switched reluctance motor is modelled using analytical formula in designing process. Later, the designed model is analyzed using ANSYS RMxprt software. In order to achieve 5kW power rating and to match with the design requirement, the switched reluctance motor model has been analyzed using RMxprt tools for the preliminary parameters design process. This tools is able to predict the output performance of motor in term of speed, flux linkage characteristic, output torque and efficiency.

Enhanced Torque Control and Reduced Switching Frequency in Direct Torque Control Utilizing Optimal Switching Strategy for Dual-Inverter Supplied Drive M. Khairi Rahim; Auzani Jidin; Tole Sutikno
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 7, No 2: June 2016
Publisher : Institute of Advanced Engineering and Science

Direct Torque Control (DTC) of induction machine has received wide acceptance in many adjustable speed drive applications due to its simplicity and high performance torque control. However, the DTC using a common two-level inverter poses two major problems such as higher switching frequency (or power loss) and larger torque ripple. These problems are due to inappropriate voltage vectors which are selected among a limited number of voltage vectors available in two-level inverter. The proposed research aims to formulate an optimal switching strategy using Dual-Inverter Supplied Drive for high performances of DTC. By using dual-inverter supplied, it provides greater number of voltage vectors which can offer more options to select the most appropriate voltage vectors. The most appropriate voltage vectors should able to produce minimum torque slope but sufficient to satisfy torque demands. The identification is accomplished by using an equation of rate of change of torque which is derived from the induction machine equations. The proposed strategy also introduces a block of modification of torque error status which is responsible to modify the status such that it can determine the most optimal voltage vectors from a look-up table, according to motor operating conditions. The improvements obtained are as follows; 1) minimization of switching frequency (reduce power loss), and 2) reduction of torque ripple. Some improvements obtained in the proposed strategy were verified via experimentations.

Investigation on various stator structure towards noise and vibration Nurfaezah Abdullah; Kasrul Abdul Karim; Raja Nor Firdaus Raja Othman; Auzani Jidin; Tole Sutikno
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 14, No 3: September 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v14.i3.pp1403-1413

This research analyses the noise and vibration characteristics of permanent magnet motors (PMM) with the electromagnetic characteristics, with an emphasis on high-speed motor segmented closed slot stator. The interaction between the stator, rotor, and magnets can cause a vibration that results in the loud sound due to the high magnetic energy. Even if there aren't many vibrations to contend with, the fluctuation of motor vibrations causes more serious harm. The studies covered slotted stator, closed slot stator, and segmented with closed slot stator. The objective is to analyze the cogging torque relation towards vibration and the effect of natural frequency at steady-state behavior of the structure. ANSYS finite element analysis (FEA) is used to generate electromagnetic analysis performance whilst ANSYS mechanical used to simulate the modal and harmonic analysis at the stator tooth tips surface to define the structure when the steady-state condition under vibrational stimulation. Anticipation on this work shows, the lowest cogging torque produce less radiated sound. Thus, the result indicates the cogging torque profiles had good agreement with the equivalent radiated power level (ERPL) waterfall diagram.

Co-Authors Aiman Zakwan Jidin Aiman Zakwan Jidin Atikah Razi Azrita Alias Azziddin M. Razali Farina Sulaiman Fazlli Patkar Goh Wee Yen Huzainirah Ismail Huzainirah Ismail Jurifa Mat Lazi Kasrul Abd Karim Kasrul Abdul Karim Khairi Rahim Komathi Applasamy Kwang T. C. Logan Raj Lourdes Victor Raj M. H. N. Talib M. Khairi Rahim M. Nazri Othman Maaspaliza Azri Md Hairul Nizam Talib MD Hairul Talib Mohd Amran Mohd Radzi Mohd Hatta Jopri Mohd Luqman Jamil Mohd Luqman M. Jamil Mohd Luqman Mohd Jamil Mohd Luqman Mohd Jamil‬ Mohd Ruddin Ab Ghani Muhammad Zaid Aihsan Muhammed Fazlur Rahman Muhd Zharif Rifqi Zuber Ahmadi Musa Yusup Lada N. Abdullah Nabil Farah Nashiren Farzilah Mailah New Lai Sim Nik Rumzi Nik Idris Noor Azida Noor Azlan Noor Izzri Abd. Wahab Nor Azizah Mohd Yusoff Nor Faezah Alias Norhisam Misron Normaisharah Mamat Nur Arifah Ramli Nur Huda Mohd Amin Nurfaezah Abdullah Nurul Ain Mohd Said Ömer Aydoğdu Qazwan Abdullah Raja Nor Firdaus Raja Othman Rizky Ajie Aprilianto RN Firdaus S. Azura Ahmad Tarusan Sharin Ab Ghani Siti Azura Ahmad Tarusan Siti Azura Binti Ahmad Tarusan Subrata, Arsyad Cahya Suhairi Rizuan Sundram Ramahlingam Syahid Hikmatul Wahid Syahrul Hisham Mohamad Syamim Sanusi T. Sutikno Tengku Noor Ariana Tengku Azam Tole Sutikno Wahidah Abd Halim Wail Ali Ali Saleh Yusnida Ahmad Tarmizi Z. Ibrahim Zanariah Jano Zulfikri Zaki Zolkapli Zulhani Rasin Zulhani Rasin Zulkifilie Ibrahim Zulkiflie Ibrahim Zuraidi Md Tahir

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Journal : International Journal of Power Electronics and Drive Systems (IJPEDS)