Results of field calculations for a two-dimensional thermal model of induction machine was presented in this paper. Calculations and measurements have been provided for an induction squirrel-cage motor of low power and the following ratings: P(N)=1.5 kW, 2p=4, f(N)=50 Hz, U(N)=3x380 V. A two-dimensional geometric model has been proposed for field calculations and the model has been divided into areas with different physical properties of materials and structure. Within these areas thermal equations (1) have been defined; they use different parameters and were solved with partial differential equations. Two simulation models (Fig. 1.) reduced which consists of a single stator slot and a single rotor slot were discussed in this paper. During simulations, a solution of the thermal model has represented a distribution of temperature increase in the induction machine (Fig. 4 and Fig. 5.) and resistivity functions (Fig. 6). This work has been sponsored in 2008 as AGH University Grant no. 11.11.120.615.
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