Energy-based digital control of a ripple correction circuit in a unity-power-factor single-phase AC/DC converter

DOI IR Web Site Open Access

Bibliographic Information

Other Title
  • 高力率単相AC/DCコンバータにおけるリップル補償回路のエネルギーベースでのディジタル制御法
  • コウリキリツ タンソウ AC/DC コンバータ ニオケル リップル ホショウ カイロ ノ エネルギー ベース デノ ディジタル セイギョホウ

Search this article

Abstract

A unity-factor AC/DC converter in single-phase has a double-frequency ripple component in the input power. Usually a large aluminum electrolytic capacitor is inserted to reduce the ripple. However, the method has size and aging problems. It is necessary to develop an alternative energy buffer circuit to absorb the ripple power. This paper proposes a digital control method of a ripple correction circuit which is a bidirectional boost chopper in parallel with the small output capacitor and absorbs the ripple current as an energy buffer. The control scheme is new and applied not only to the correction circuit but also to the main circuit because the idea is based on the energy balance discrete equation between the input and the output powers. First the proposed ripple correction method and the control scheme is described. It is based on a new multirate digital control method which has two sample rates to control its current gain for the unity power factor and to reduce the ripples from the output capacitor. Then the proposed control method is validated through simulation with Saber. Finally it is validated through experiment for its ripple reduction effects with a dSPACE-based digital control circuit where the digital control C codes are automatically generated from Simulink S-function models.

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top