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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) International Journal of Advances in Applied Sciences
Irma Wani Jamaludin
Universiti Teknikal Malaysia Melaka
Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics

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A Review: Design Variables Optimization and Control Strategies of a Linear Switched Reluctance Actuator for High Precision Applications Yeo Chin Kiat; Mariam Md Ghazaly; Shin Horng Chong; Irma Wani Jamaludin
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 8, No 2: June 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (486.811 KB) | DOI: 10.11591/ijpeds.v8.i2.pp963-978

Abstract

This paper presents the review of design variables optimization and control strategies of a Linear Switched Reluctance Actuator (LSRA).  The introduction of various type of linear electromagnetic actuators (LEA) are compared and the advantages of LSRA over other LEA are discussed together with the type of actuator configurations and topologies. The SRA provides an overall efficiency similar to induction actuator of the similar rating, subsequently the friction and windage losses are comparable but force density is better. LSRA has the advantage of low cost, simple construction and high reliability compare to the actuator with permanent magnet. However, LSRA also has some obvious defects which will influence the performance of the actuator such as ripples and acoustic noise which are caused by the highly nonlinear characteristics of the actuator. By researching the design variables of the actuator, the influences of those design variables are introduced and the detail comparisons are analyzed in this paper.  In addition, this paper also reviews on the control strategies in order to overcome the weaknesses of LSRA.
Test rig development for overshot water wheels under low-head, low-flow conditions in pico-hydropower applications Izzatie Akmal Zulkarnain; Irma Wani Jamaludin; Mohd Farriz Basar; Kamaruzzaman Sopian
International Journal of Advances in Applied Sciences Vol 15, No 3: September 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v15.i3.pp1227-1238

Abstract

This study presents the development and validation of a controllable experimental test rig for overshot water wheels operating under low-head and low-flow conditions commonly found in pico-hydropower resources. Many potential pico-hydro sites operate at heads below 1.5 m with minimal flow, where conventional turbines often experience reduced efficiency and suitable laboratory-scale testing facilities remain limited. The developed system consists of two high-density polyethylene (HDPE) water tanks, an adjustable-inclination water channel, a circulation pump, and an overshot water wheel equipped with recyclable polyethylene terephthalate (PET) bottle blades. The test rig operates within hydraulic range of 0.525 - 1.169 m head and 0.01 - 0.02 m³/s flow rate, enabling the simulation of realistic pico-hydropower conditions. Water velocity was regulated using the water trajectory method by varying the channel inclination angle between 10° and 50°, producing velocities ranging from 1.494 m/s to 4.519 m/s. Experimental results show stable and repeatable hydraulic conditions with measurement uncertainty of approximately ± 0.03 m/s. These findings demonstrate that the developed test rig provides a reliable platform for future investigations of overshot water wheel performance parameters, including rotational speed, angular velocity, force, torque, mechanical power, and efficiency in pico-hydropower applications.
Co-Authors Izzatie Akmal Zulkarnain Kamaruzzaman Sopian Mariam Md Ghazaly Mohd Farriz Basar Shin Horng Chong Yeo Chin Kiat