Modeling of a PFC Converter and Controller

Active power factor correction (PFC) is used extensively in ac-dc converters since it allows the converter to meet harmonic standards without the need for a bulky and costly input filter that normally accompanies a passive ac-dc converter. In this application example, a single phase boost-type 600 W PFC converter is modeled in PLECS. This application example serves as both a modeling and control design example. The controller, based on a typical commercially-available PFC control IC, is modeled as a custom component and includes features such as interleaved switching and frequency dithering. The design of the current and voltage controllers is achieved with the aid of the PLECS Impulse Response Analysis tool. Complete documentation and example model files used for design and simulation of the system accompany this application note.

Requirements

PLECS Blockset

 PLECS Blockset 3.1 or newer.
 Matlab 7.0 (R14) or newer

PLECS Standalone

 PLECS Standalone 3.1 or newer.

Download

You can download the example models and the documentation for PLECS Blockset here (987 KB) and for PLECS Standalone here (957 KB).