Estimate of the influence of orbital rotor fans on the thermal parameters of electric motors

摘要

Using a one-stage theory of heating, an analytical model of the effect of orbital rotor fans on the thermal emission of an electric motor is developed. The model requires the introduction of the heat load distribution over the effective area of the fans and allows calculation of the grid of the heating curves and assessment of the reduction in the heat emission coefficient. Design schemes of fans and curves of the variation in the heat emission coefficients for various parts of the motor are given. The use of the fans enables the heating of the end stator windings, which carry the highest heat load, to be reduced.