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).
J. W. Kimball and P. T. Krein, "A Current-Sensorless Digital Controller for Active Power Factor Correction Control Based on Kalman Filters," Proceedings of the 23rd Annual IEEE Applied Power Electronics Conference and Exposition, 2008. APEC 2008, Institute of Electrical and Electronics Engineers (IEEE), Feb 2008.
The definitive version is available at http://dx.doi.org/10.1109/APEC.2008.4522895
23rd Annual IEEE Applied Power Electronics Conference and Exposition, 2008. APEC 2008
Electrical and Computer Engineering
National Science Foundation (U.S.)
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
Article - Conference proceedings
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