Equivalent circuit for the brushless doubly fed machine (BDFM) including parameter estimation and experimental verification

Author

Roberts, P.C. ; McMahon, R.A. ; Tavner, P.J. ; Maciejowski, J.M. ; Flack, T.J.

Author_Institution

Dept. of Eng., Univ. of Cambridge, UK

Volume

152

Issue

4

fYear

2005

fDate

7/8/2005 12:00:00 AM

Firstpage

933

Lastpage

942

Abstract

Experimental results from a frame size 180 brushless doubly fed (induction) machine (BDFM) fitted with four rotor designs are presented. The machine is intended for use as a variable speed generator, or drive. A per phase equivalent circuit for the machine has been developed and a method of obtaining parameters for the circuit is described. Expressions for the torque as a function of speed have been derived and predictions of machine performance in both self-cascaded and synchronous (doubly fed) modes have been verified experimentally. The work illustrates the link between rotor equivalent circuit parameters and machine performance and a comparison between rotor designs has been made.

Keywords

brushless machines; equivalent circuits; induction motors; parameter estimation; rotors; synchronous motors; torque; BDFM; asynchronous mode; brushless doubly fed machine; induction machine; parameter estimation; per phase equivalent circuit; rotor designs; self-cascaded mode; synchronous mode; torque speed characteristics; variable speed drive; variable speed generator;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20045106

Filename

1468711