Inclusion of magnetic saturation in dynamic models of synchronous reluctance motors

Abstract

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Current control for IPMSM drives: Direct discrete-time pole-placement design

“…The saturation effects were modeled in the estimatesL d andL q by means of the power functions [19]. In order to properly model the effect of the differential inductances, a one-step prediction of the inductance estimates would be needed, since the transformations in (28) become…”

“…The design method is directly applicable to SPMSM drives as well. APPENDIX EXACT DISCRETE-TIME MODEL The closed-form solutions for the elements of in (19) …”

Minimizing losses of a synchronous reluctance motor drive taking into account core losses and magnetic saturation

“…The look-up table is usually computationally inefficient and needs interpolation. As reviewed in [17], the measured data are often fitted to explicit functions. The magnetic saturation effects can be modeled as current functions of the fluxes [17] using two-dimensional power functions:…”

Signal-injection assisted full-order observer with parameter adaptation for synchronous reluctance motor drives

“…The magnetic saturation has been modeled as functions of the estimated flux [26], A smooth transition from standstill to high-speed operation is implemented by decreasing the injected voltage as the speed increases,…”