Sliding transformers for linear contactless power delivery

Author

Barnard, Jacobus M. ; Ferreira, Jan A. ; Van Wyk, Jacobus Daniel

Author_Institution

Energy Lab., Rand Afrikaans Univ., Johannesburg, South Africa

Volume

44

Issue

6

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

774

Lastpage

779

Abstract

Contactless power delivery systems for mobile loads use transformers comprised of a core with a secondary winding sliding along an extended primary winding. The sliding transformer is identified as the most limiting component in the system and is analyzed by representing it as a special, multiturn power transmission line. Two performance parameters, namely the transmission line efficiency and system penalty factor, are introduced. It is shown that fundamental restrictions may limit the attainable performance of the system. The inductance of the primary winding is identified as a parameter which can be optimized to improve the system performance. Experimental results for a short- and a long-stroke transformer are presented

Keywords

electromagnetic induction; power supplies to apparatus; power transformer testing; transformer cores; transformer windings; linear contactless power delivery; long-stroke transformer; magnetic cores; multiturn power transmission line; performance parameters; primary winding; secondary winding; short-stroke transformer; sliding transformers; system penalty factor; transmission line efficiency; Capacitance; Capacitors; Conductors; Inductance; Inverters; Jacobian matrices; Magnetic cores; Power transmission lines; Rectifiers; Transformer cores;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.649938

Filename

649938