Active power factor correction seeks to obtain unity power factor and sinusoidal line currents. Optimized nonsinusoidal line currents reduce filter capacitor requirements with a nonunity target power factor. Implementation methods are presented that permit reduced power factor to be traded off against filter size in a nearly optimum manner. A simple waveform shape can reduce filter component size by about 40% in active PFC converters at the same level of complexity as in conventional PFC designs while yielding power factor as high as 0.9. Two approximate methods to generate appropriate shapes are presented. They offer direct practical implementation of nonunity power factor solutions and have been verified experimentally. Such solutions meet power quality standards and deliver acceptable power factor with reduced converter cost.

Meeting Name

21st Annual IEEE Applied Power Electronics Conference and Exposition (2006: Mar. 19-23, Dallas, TX)


Electrical and Computer Engineering

Keywords and Phrases

Filter Capacitor; Power Factor Correction (PFC); Power Filters; Switching Convertors; Waveform; Sinusoidal Line Currents; Approximation Theory; Electric Converters; Electric Currents; Standards; Systems Analysis; Electric Filters; Optimization Methods; Reactive Power; Active Filters; Costs; Power Harmonic Filters; Capacitors; Shape; Power Quality; IEC Standards

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2006 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Mar 2006