Papers by Author: M.S. Abdul Manan

Abstract: Thermal modeling is a method used to formulate a temperature profile for a generator. The most common types of thermal model used by researchers are transient and steady-state model. There is insufficient of information regarding prolong usage of a generator in a confined space. The purpose of this paper is to formulate an empirical temperature model for the winding coils for the duration of 24 hours and to investigate whether a peak temperature exists. From the results, it can be concluded that there is a peak temperature detected for the winding coils in a non-controlled room temperature that occurs after 9 hours of experiment. The effect of room temperature on the winding coils temperature for no load condition is only 6.6%.

Abstract: In order to develop a thermal model for a generator or a motor, several experiments need to be conducted. One of the challenges in conducting the experiment is that it consumes a lot of time to reach its steady state condition. This is because a generator or a motor has a lot of moving parts and a large amount of surface area causes a very slow rise in temperature. This paper proposes a new method to reduce the experimental time by estimating the settling time using a modeling technique used in the control system engineering. From the data presented, the experimental time can be reduced approximately 55 percent. Furthermore, it is also found that the average steady state temperature for the wire winding is 47.55°C and the predicted temperature from the formulated equation is 47.09°C with error less than 1 percent.

Abstract: Manufacturing companies define the qualities of thermal removing process based on the dimension and physical appearance of the cutting material surface. Therefore, the roughness of the surface area of the cutting material and the rate of the material being removed during the manual plasma arc cutting process was importantly considered. Plasma arc cutter Selco Genesis 90 was used to cut the specimens made from Standard AISI 1017 Steel manually based on the selected parameters setting. Two different thicknesses of specimens with 3mm and 6mm were used. The material removal rate (MRR) was measured by determining the weight of the specimens before and after the cutting process. The surface roughness (SR) analysis was conducted to determine the average roughness (Ra) value. Taguchi method was utilized as an experimental layout to obtain MRR and Ra values. The results reveal that for the case of manual plasma arc cutting machining, the SR values are inversely proportional to the MRR values. The quality of the surface roughness depends on the dross peak that occurred during the cutting process.