Ms. Boger et al., GENERAL POLE NUMBER MODEL OF THE BRUSHLESS DOUBLY-FED MACHINE, IEEE transactions on industry applications, 31(5), 1995, pp. 1022-1028
brushless doubly-fed machine is receiving attention as a contender for
several niche applications, In some cases, the speed ranges of these
applications appear to be more readily met by judicious selection of t
he pole-pair numbers of the stator phase windings, In order to compare
different proposed pole-pair configurations and to help in the develo
pment of specific designs, a general analytical model, in both dynamic
and steady state forms, is presented, This model supersedes previous
analyses which are restricted to the 3/1 pole-pair combination of earl
y laboratory machines, The new model is also completely valid for both
positive and negative control voltage sequences. The increased modeli
ng flexibility enables sound estimations of the drive converter rating
s, the reduction of which is the keg to the economic advantage of thes
e machines, An example of the correlation of the performance predictio
ns and test results encourages use of this new model.