Development of Power Electronic Practicum Units for Vocational Education

Abstract

The purpose of this research is to develop a Power Electronics practicum unit in the Department of Electrical Engineering Education, Faculty of Engineering, YSU, so that it is suitable and feasible to be applied in vocational education learning by considering the safety aspects of the components and their users. The development includes a three-phase AC source voltage drop from 45 volts to 24 volts per phase, load replacement, the use of up and down voltage converters with greater current capability, and a direct voltage power supply without a transformer switching model. The method used is research & development with technical tests for each part of the module according to the purpose of setting up the practicum unit. The research results were obtained; the power supply with a 24 volt AC source is able to supply a current of 3.63 amperes at a direct voltage of 20 volts with a voltage drop of 0.5 volts, a direct voltage lowering converter is able to change the voltage from 15 volts to 6 volts at a current of 3.66 amperes, with a voltage drop of 0.13 volts. A direct voltage booster converter is able to convert a voltage of 15 volts from 1.78 amperes to 25 volts with a voltage drop of 0.1 volts. The four-pole three-phase motor can be controlled via the TRIAC from zero rotation to maximum rotation, the protection system is capable of breaking the fuse instantaneously in the event of a faulty connection from phase-neutral to phase, followed by disconnection of the 24-volt three-phase AC power source within one second.