A switched-winding transformer with low quiescent loss to meet the level VI efficiency standard at high power density
Name
ECCE17 Switched Transformer Structure - Braun Chen 1July17.pdf
Description
Accepted version
Size
8.31 MB
Format
Adobe PDF
Checksum (MD5)
37778af61549855e416fbeaadc3cb489
Author(s)
Braun, Weston
Chen, Minjie
Perreault, David J
Date Issued
November 2017
Journal
2017 IEEE Energy Conversion Congress and Exposition (ECCE)
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Braun, Weston D. Braun et al. "A switched-winding transformer with low quiescent loss to meet the level VI efficiency standard at high power density." 2017 IEEE Energy Conversion Congress and Exposition (ECCE), October 2017, Cincinnati, Ohio, USA, Institute of Electrical and Electronics Engineers (IEEE), November 2017 © 2017 IEEE
Version
Author's final manuscript
Abstract
Many control and monitoring applications including thermostats, doorbells, and security systems utilize 60 Hz transformers with grid-voltage inputs and 16 V to 24 V ac outputs. The new DOE Level VI efficiency standard places stringent requirements on the no-load quiescent loss of grid-interface power supplies, including these low-voltage transformers. This paper explores a low-cost but highly effective approach to reduce the quiescent loss and improve the power density of these transformers while meeting the Level VI efficiency standard. By reconfiguring windings based on the operating power level, one can achieve higher average efficiency, lower quiescent loss, and higher power density. It is experimentally demonstrated that compared to a conventional transformer design that meets the new Level VI standard, the proposed switched-winding transformer approach can more than double the achievable transformer power rating at the same size, weight and core, while requiring only a modest increase in complexity.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1109/ecce.2017.8095989
