A Phase Difference Angle Detection System Through MQTT Protocol in Monitoring Induction Motor Using ESP32

In power systems, the occurrence of phase difference angles or phase shifts of sinusoidal waveforms between phases can harm three-phase induction motors and machinery. The phase difference angle measurement may not be able to measure or read the desired value due to its constraints. Because of this, the purpose of this research is to develop and construct a system for determining the phase difference angle of an induction motor using the MQTT protocol, a real-time result presenting the results of the dashboard with data recording into the database to display using ESP32. The system consists of an ESP32, a voltage sensor, and a current sensor to monitor a 3-phase induction motor, displaying them through the MQTT system. The database data from the power analyzer meter and the MQTT dashboard were compared, and it was discovered that the inaccuracy was less than 2%, which was acceptable by IEEE 802.11 regulations. In the application of ESP32 to process and send the display value via MQTT to detect the phase difference of the induction motor, one can view the historical data and make accurate decisions before the motor is damaged.