Multimedidor didático de baixo custo para motores de indução trifásicos

Given the growing demand for fundamental teaching devices for equalizing and applying concepts taught in the classroom, the creation of accessible measuring devices becomes essential. However, the high costs associated with this equipment represent a significant obstacle to their adoption in teaching benches. Therefore, the purpose of this course completion work was to develop a multimeter for teaching purposes that could be applied to three-phase induction motors and allow the analysis of variables through communication interfaces. For this we use components such as ESP32, ACS712, rectifier circuits and display I2C, Python. The results obtained from the measured parameters, including voltage, current in the three phases and RPM, were satisfactory, since with low-cost components it was possible to develop a teaching tool that evaluated the engine in different operating conditions.