Simulation and design of 1kVA two-stages converter using a DC/DC preregulator and a single-phase inverter (French text).

摘要

The area of power switching devices has expanded rapidly in the last few years. Several designers have recognized the advantages of these semiconductors, which operate at high frequency and use them to reduce considerably power electronics converters size and weight.; In this work, we propose to design a DC/AC converter capable of delivering 1kVA and operating at 20kHz. This work is achieved in collaboration with ASTEC Advanced Power Systems.; The power converter under study uses MOSFET devices. It contains two conversion stages. The first one, a DC/DC boost converter fed by a 40V/60V battery bank. Also, in order to reduce switching losses, an auxiliary resonant circuit assuring a Zero Voltage Transition (ZVT) in the main MOSFET is added. The DC/DC converter supplies the second stage, which is a DC/AC converter. This last, provides a pure output sine wave voltage (6013z, 120V) with a very low total harmonic distorsion content (THD 2%).; The DC/AC converter efficiency should exceeds 90% and it must allow parallel operation to increase the output power up to several KVA. Such a system is suitable for a wide range of applications including telecommunication and other industrial and residential applications.