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Evaluation of a single‐phase 50‐Hz axial rotary transformer for DFIG systems
Author(s) -
Zietsman Nikita L.,
Gule Nkosinathi
Publication year - 2018
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22528
Subject(s) - downtime , transformer , doubly fed electric machine , induction generator , engineering , automotive engineering , control theory (sociology) , computer science , electrical engineering , voltage , reliability engineering , ac power , control (management) , artificial intelligence
In this paper, a comprehensive analytical design methodology for a single‐phase axial rotary transformer (RT) is presented. The proposed procedure is designed to yield the minimum RT volume or size while at the same time offer adequate efficiency. Furthermore, the proposed methodology is used in the design and evaluation of a 1.2‐kVA single‐phase axial RT. The developed prototype proved that the methodology leads to a significant reduction in size as compared to a prototype designed using standard methods. The measured efficiency of this transformer is found to be 91.4%. The presented design methodology can be easily extended to a three‐phase RT that can be applied in place of slip rings in brushless doubly fed induction generators (DFIGs). This could reduce maintenance downtime in the operation life of the DFIG. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.