Conversor indireto CA-CA programável para testes de equipamentos eletrônicos

Abstract

This work presents the development and implementation of a programmable indirect AC-AC converter designed to simulate various electrical grid conditions. By programming different voltage and frequency levels, the equipment is able to replicate normal and adverse situations, such as variations and disturbances in the electrical grid, allowing for validation tests on electronic products. These tests are essential to ensure that products comply with regulatory standards and operate reliably under different power distribution configurations. The converter includes a three-phase full-bridge rectifier, followed by a capacitive filter. A single-phase full-bridge inverter reverses the process and converts the DC back into AC. The inverter uses a transistor full-bridge to generate a sine wave, which is essential for simulating different electrical grid conditions. The indirect AC-AC converter was experimentally verified by considering low voltage levels of 15 V and 60 V from an auxiliary power supply. Furthermore, it was verified by supplying the inverter stage with 311 V from the designed three-phase rectifier.