For low-power AC-DC converters, power factor correction (PFC) can be accomplished simply with certain converters operating in discontinuous conduction mode (DCM). At higher power levels, DCM results in higher losses, so most PFC converters use current feedback to actively track the correct current waveshape. This work presents a way to provide PFC control without the current sensor, by replacing the sensor with a Kalman filter, which is essentially a stochastic observer. Experimental results verify its high power factor and low total harmonic distortion (THD).

Meeting Name

23rd Annual IEEE Applied Power Electronics Conference and Exposition (2008: Feb. 24-28, Austin, TX)


Electrical and Computer Engineering


Grainger CEME
National Science Foundation (U.S.)


This work was supported by the National Science Foundation under grant ECS 06-21643, and by the Grainger Center for Electric Machinery and Electromechanics.

Keywords and Phrases

AC-DC Power Converters; Kalman Filters; Digital Control; Electric Current Control; Harmonic Distortion; Observers; Power Conversion Harmonics; Power Factor Correction; Power Harmonic Filters; Active Filters; Control Theory; Digital Filters; Electric Power Factor; Electric Power Factor Correction; Exhibitions; Power Electronics; Sensors; Wave Filters; AC-DC Converters; Active Power Factor Correction; Current Feedback; Current Sensor; Digital Controllers; Discontinuous-Conduction-Mode; High Power Factors; Low Powers; PFC Converters; Power Leveling; Sensor-Less; Total Harmonic Distortion; AC Generator Motors

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2008 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Feb 2008