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In this paper, a piecewise linearization of non-linear magnetic characteristics for a drive is proposed to generalize an earlier proposed control algorithm [1] to the case with the saturation. A piecewise linearization with respect to current is crucial for extending the Floquet theory based variable transformations to this case. However, any smooth function in rotor angle 8 can be used to approximate...
Generalized root-loci techniques, developed in the mid-70's for squirrel cage motors, have been extended to wound rotor, slip energy recovery systems (static Scherbius drive). In this paper, the influence of a feedback control loop on these root-loci is considered. General conclusions on Scherbius drive dynamics as well as some experimental verifications are also included.
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