By Topic

Design of High-Efficiency Bidirectional DC–DC Converter and High-Precision Efficiency Measurement

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Wensong Yu ; Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; Hao Qian ; Jih-Sheng Lai

This paper first introduces the design of an ultrahigh efficiency 50-kW bidirectional dc-dc converter at zero-voltage-switching operation, and then, a high-precision efficiency measurement method using a regenerative approach. The ultrahigh efficiency bidirectional dc-dc converter is achieved with 1) the use of CoolMOS as the main switch under zero-voltage soft switching condition; 2) multiple-phase legs for current sharing to reduce the conduction loss; and 3) coupling inductors between each two-phase legs to reduce the core loss. Two identical hardware prototypes were designed, fabricated, and tested for performance evaluation. In order to precisely measure the converter efficiency, the two identical bidirectional dc-dc converters are tested with one as the device under test and the other as the regenerative unit. With the use of ?? 0.5% current shunt and regenerative measurement, the relative efficiency error stays below ??0.025%. Measured efficiency with load from 20% to 100% consistently shows above 97.50%. At the 50 kW full-load condition, the efficiency is 99.05% with ??0.01% efficiency relative error.

Published in:

Power Electronics, IEEE Transactions on  (Volume:25 ,  Issue: 3 )