A Current-Sensorless Digital Controller for Active Power Factor Correction Control Based on Kalman Filters
This document has been relocated to http://scholarsmine.mst.edu/ele_comeng_facwork/776
There were 50 downloads as of 27 Jun 2016.
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).