Comparison of realization techniques for PFC inductor operating in discontinuous conduction mode

Several design techniques are compared for producing a power factor correction (PFC) boost inductor operating in discontinuous conduction mode. In this application, fringing fields associated with high frequency current pulses cause problems of winding loss in the vicinity of an air gap, in particul...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2004-03, Vol.19 (2), p.531-541
Main Authors: Leonavicius, V., Duffy, M., Boeke, U., Mathuna, S.C.O.
Format: Article
Language:English
Subjects:
Air conditioning
Core loss
Electronics
Frequencies
High frequencies
Inductors
Loss measurement
Magnetic cores
Magnetic devices
Magnetic flux
Magnetic materials
Magnetism
Planar structures
Power factor correction
Power supply
Switching frequency
Tradeoffs
Winding
Zero voltage switching
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Summary:Several design techniques are compared for producing a power factor correction (PFC) boost inductor operating in discontinuous conduction mode. In this application, fringing fields associated with high frequency current pulses cause problems of winding loss in the vicinity of an air gap, in particular with planar core shapes. For this reason, a planar inductor in which a lumped gap is replaced by a distributed air gap material is described and investigated. The consequences of lumped versus distributed air gap for the losses of the boost inductor are investigated. A significant reduction in AC winding loss of the planar structure with the composite core is demonstrated. However, the trade-off between reduced winding loss and increased core loss for this technique has to be considered along with the selection of proper winding technology. Four boost inductor design realizations are built and compared. Presented winding loss models are verified with measurements on prototypes operating in an 80 W PFC converter.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2003.823249