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This paper proposes a piecewise variable parameter model of iron losses in induction motors. In this model, two additional flux density terms are used to reflect the non-linear characteristics of the magnetic materials, and the main loss parameters of the proposed model are piecewise varying with the peak value and frequency of the flux density. Meanwhile, the fine analysis of the iron losses caused...
The main features of a dynamic hysteresis model (DHM) and its implementation into the electromagnetic transient program (EMTP-ATP) are described. A method of fitting the DHM to catalog data is proposed. The implementation of the DHM within a transformer model is illustrated by transient calculations. Possible methods of fitting the DHM-based transformer model to a no-load test are outlined.
This paper addresses the influence of the estimation of hysteresis, eddy current and excess loss coefficients on the prediction of the overall iron losses in traction motors. Two standard iron loss models (according to Bertotti and Jordan) are presented and it is examined how the determination of the corresponding loss coefficients is effecting the iron loss calculation for variable speeds. It is...
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