Internet das coisas (IoT) aplicado no controle online de variação de velocidade de um motor de indução

Abstract

The Internet of Things (IoT) can be defined as the connection between the physical and virtual worlds, involving intelligent devices with sensing, processing, and digital communication capabilities. Projects in the IoT field have grown significantly over the last decade, as they offer numerous possibilities in both residential environments, such as remote light control, voice commands, and artificial intelligence, and industrial applications, such as motor speed control and equipment monitoring. The objective of this work is to develop a control system for the operation of a variable speed drive for a three-phase induction motor using the Internet of Things and an ESP32 microcontroller. It was developed a WEB server, not ESP32, which can be accessed through a Wi-Fi connection with a smartphone or computer. This WEB server offers the user an interface that allows selecting the electrical operating frequency of the variable speed drive. The ESP receives a reference and produces a PWM signal with a duty cycle proportional to the desired electrical frequency. A low-pass filter converts the PWM signal into an analog signal that defines the operating frequency of the drive. The ESP32 microcontroller was developed as an efficient solution for projects in the IoT area, enabling various applications through wireless connections, such as Wi-Fi and Bluetooth. Also, your programming can be carried out on the Arduino IDE platform, or a practical and accessible solution is shown. Additionally, this work constitutes a practical application of various contents learned throughout the Electrical Engineering course. The experimental results indicate that the based control system allows adequate control of the motor speed, as well as the advantages offered by the IoT.