A step-down isolated three-phase IGBT boost PFC rectifier using a novel control algorithm with a novel start-up method


Kose H., Aydemir M. T.

TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES, vol.29, no.2, pp.978-993, 2021 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.3906/elk-2004-176
  • Journal Name: TURKISH JOURNAL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCES
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Applied Science & Technology Source, Compendex, Computer & Applied Sciences, INSPEC, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.978-993
  • Keywords: Start-up of boost rectifier, six switch boost rectifier, current synchronized look-up table based control method, isolated boost rectifier, VOLTAGE, ESSENCE

Abstract

For some industrial converter applications such as battery chargers, a DC/DC converter is needed to step down the high DC (direct current) voltages generated by PWM (pulse with modulated) rectifiers to lower voltage levels such as 110V/220V. These both complicate the design and decrease the efficiency. In this paper, a novel topology that includes a step-down transformer and a novel control algorithm is proposed. The proposed current, which is synchronized, look-up table based, sinusoidal PWM control method (CS-LUT-SPWM method) using switching frequency-oriented synchronization (SWFOS) results in a very fast PWM generation and stable operation. Finally, a new thyristor-based start-up circuit providing safe operation when there is energy black out is proposed. A 32-kW converter has been designed, built, and tested to prove the concepts. The proposed converter has an efficiency higher than 94%, an input current total harmonic distortion (THDi) less than 5%, and a power factor closer to 0.99. Theoretical calculations and experimented results show that proposed converter has better efficiency (94%-96%) compared to classical PWM boost rectifiers with a series DC/DC converter topology (92%) in the literature. Fast PWM control algorithm, less complexity, low switching noises, one-stage conversion circuit, and novel start-up circuit are other advantages of the proposed converter.