Universidade Federal de Santa Maria
ANÁLISE COMPARATIVA DE CONVERSORES MONOFÁSICOS
APLICADOS À CORREÇÃO DE FATOR DE POTÊNCIA
AUTHOR: ENG. FERNANDO BELTRAME
RESEARCH SUPERVISOR: DR. ENG. JOSÉ RENES PINHEIRO
Santa Maria, August 12th, 2009.
This work presents a study and a comparative analysis of high power single-phase
converter applied to power factor correction in according to the international standards IEC
61000-3-4 (harmonics limitation) and CISPR 22 (electromagnetic interference limitation) for
high power applications. The converters studied were the conventional boost converter, the
interleaved boost converter, with two cell operating with a delay angle of 180º between each
other, and the dual boost converter. Such converters are used in front-end modules of
information technology equipment. All converters have the same input and output voltage and
the same input current. The converters were projected to provide the same total input
harmonic distortion (THD), with the idea of using the same input filter. Implementation of the
control laws was performed through a digital control with the use of a 16 bits microcontroller.
All converters were, first of all, studied and presented in this dissertation. The
analyzed parameters for comparison were: power factor, total harmonic distortion (THD),
semiconductor losses and magnetic losses, heat-sinks volume and magnetics volume,
conducted electromagnetic interference, performance and costs.