Estudo e desenvolvimento de um conversor CA-CA com modulação complementar PWM

Abstract

This paper presents a proposal for a voltage stabilizer through an AC -AC PWM converter with complementary switching with sinusoidal output and low THD - Total Harmonic Distortion. Thus was used complementary PWM - Pulse Width Modulation, the switching control techniques in a four devices configuration, to ensure the operation of the circuit for each instant of voltage and current half cycles ensuring the quality delivered to the load. From the observation of damage to motors and electrical appliances in general due to the action of uncontrolled voltage in sensitive loads, envisioned to mitigate these negative effects from the technological development based on a new converter. The results showed a large commercial equipment attractive due to its small size, low cost and efficiency, which lifespan of the devices connected to it. In this workpresents detailed the operation principle of the proposed converter, qualitative and quantitative analysis, simulation and experimental results obtained from the implementation of a 160W prototype.