The brushless doubly-fed machine: its advantages, applications and design methods

This paper describes the physical configuration of the brushless doubly-fed machine (BDFM) and its potential as an alternative low cost adjustable speed drive (ASD) or variable speed generator (VSG). Several applications have been demonstrated in the laboratory and have been issued with patents. The diversity of these applications and unusual configuration of the BDFM has necessitated the development of several analytical approaches which are now being developed into design tools as the development progresses from laboratory proof-of-concept devices to the first prototype applications