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Inductance Calculation and New Modeling of a Synchronous Reluctance Motor Using Flux Linkages

New modeling of a synchronous reluctance motor SynRM which has non-linear magnetic characteristics is proposed. And a control method of the SynRM using the new model is developed. The new model is based on the inductance data table or the flux linkage data table which is calculated with the flux linkages Ψd(id, iq), Ψq(id, iq) of the SynRM at each current (id, iq). Detailed calculation method of the inductances is described in this paper. The calculated torque TA with the inductance data table is compared with the FEM torque T f em and the difference is less than 5% at the rated torque. Therefore the accuracy of the new model is certified. Fig. 1 shows the inductances of the SynRM. Fig. 2 shows a sample of the flux linkage data table. Fig. 3 shows torque TA and T f em. The same method is applicable to an interior permanent magnet synchronous motor IPMSM.