Implementação de técnicas de modulação por largura de pulsos em um inversor de frequência através de comunicação bluetooth

Abstract

This study presents the implementation and analysis of various Pulse Width Modulation (PWM) techniques, including Sinusoidal PWM (SPWM), Space Vector PWM (SVPWM), Third Harmonic PWM (THIPWM), and Discontinuous PWM (DPWM), and their application to frequency inverters connected to a DC bus, utilizing the IGBT FSBB30CH60C module and the ESP32 microcontroller. The significance of frequency inverters for precise motor control and energy efficiency is discussed, underlining their crucial role in the modern industrial process optimization. The research further delves into the pivotal role of wireless Bluetooth connectivity within the Industry 4.0 framework, facilitating the swift integration and communication between devices. The modulations SPWM, SVPWM, THIPWM with ¼ and 1/6 variations, and several DPWM forms, were developed and tested. By employing a Bluetooth serial interface and the Serial Bluetooth Terminal application, it was possible to adjust the inverter’s output amplitude and frequency directly from a cell phone. The output values were measured and aligned with theoretical expectations to validate the performance of the implemented modulation techniques. Additionally, a comparative evaluation of voltage utilization from the DC bus under different techniques was performed. The results suggest that SVPWM and THIPWM techniques provide superior exploitation of the available continuous voltage for conversion compared to the SPWM technique.