Single-Phase Single-Stage AC-DC Converter with Reduced Line-Current Harmonics
DOI:
https://doi.org/10.24084/repqj08.707Abstract
The circuit topology for a single-phase single stage
ac-dc converter with the aim of minimising the converter’s line
current harmonics is presented. The circuit is based on the half
controlled ac-dc converter topology and employs active
switching devices to achieve its objective. These devices are
used to provide alternative paths for the line current during
periods when the smoothing capacitor is supplying the load
current, thus reducing the line current harmonics. Extensive
simulation studies have been carried out on the circuit and
results are presented and compared with the results obtained
from a standard ac-dc uncontrolled converter operating under
similar conditions. The results indicate that the line current
harmonics are reduced to levels compliant with those set out by
the relevant European Union’s Directive, IEC61000-3-2, on
harmonics injection into the supply mains directed at equipment
that draws current ≤ 16 A .
