Systematic nonlinear control approach to a power factor corrector design

Abstract

SUMMARYA nonlinear controller for a power factor corrector is systematically constructed via Lyapunov-based controller design approach for the bilinear state averaged model. First, a nonlinear gain of the controller is derived to shape the source current and the output voltage be desired form respectively via nonlinear H 1 control system design approach. Second, a source current reference generator is constructed, which consists of a current feedforward loop given by a steady state analysis and a voltage feedback loop with an output voltage error amplifier. The design approach makes it clear that the tracking performance for the output voltage is achieved by generating an adequate source current reference. This paper finally shows efficiencies of the approach through computer simulations.

Lyapunov-Based Robust and Nonlinear Control for Two-Stage Power Factor Correction Converter

“…As shown in Fig.4 the reference generator consists of a feedforward loop given by steady state analysis in Section 2.3 and a feedback loop with a voltage error amplifier. The amplifier K(s) is given by K(s)=k P + k I /s + k D s where k P ,k I and k D are constant parameters decided by system designers as discussed in a work by Sasaki (2009). The feedback loop is the same structure as a conventional loop used in many works (e.g., Redl (1994)).…”