Development of a Variable Frequency Drive Training System for Speed Control of a Three-Phase Induction Motor Using a Selector Switch and Proximity Switch

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Thanet Saenrat
Chalong Noppakhun
Thotsaphol Boonlerts
Sarawut Sonsupab
Chirayutt Keawarsa
Piya Bunpala

Abstract

This research aimed to (1) develop and construct a Variable Frequency Drive (VFD) training system for speed control of a three-phase induction motor using a selector switch and a proximity switch, (2) investigate the performance of the motor speed control system under different operating frequencies, and (3) evaluate the technical performance by experts and assess the satisfaction of students. The research process included designing and testing its performance at operating frequencies of 10, 20, 30, 40, and 50 Hz. The results indicated that the developed system effectively controlled the speed of the three-phase induction motor. As the operating frequency increased from 10 Hz to 50 Hz, the motor speed increased from 290 rpm to 1,450 rpm, consistent with the V/f control principle. The evaluation by 5 experts and the satisfaction assessment by 25 students indicated a very high level of effectiveness. The developed system is practical and suitable for use as an instructional media for teaching motor control.

Article Details

How to Cite
[1]
T. . Saenrat, C. Noppakhun, T. Boonlerts, S. Sonsupab, C. . Keawarsa, and P. . Bunpala, “Development of a Variable Frequency Drive Training System for Speed Control of a Three-Phase Induction Motor Using a Selector Switch and Proximity Switch”, วารสารวิจัยและนวัตกรรมการอาชีวศึกษา, vol. 10, no. 2, pp. 179–189, Oct. 2026.
Section
Research Articles

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