| Abstract |
A doubly-fed machine is a three phase a.c. machine with two accessible three phase
windings from which power can be fed to or extracted from. This paper classifies and describes the
various types of such an electrical machine with their potential in variable-speed constant-frequency
applications. Construction issues, frequency behaviour, power flow, modeling and control are the
main focus points. Covered machines are the single doubly-fed (wound rotor ) induction machine
(SDFM), the cascaded doubly-fed induction machine (CDFM), the single-frame cascaded doubly-fed
induction machine (SF-CDFM), the so-called brushless doubly-fed induction machine (BDFM), the
doubly-fed reluctance machine (DFRM) and the tandem induction machine (TIM). A comparison list
concludes this machine overview. |
