Air Gap Field Under the Saturated Tooth of an Induction Motor

Tooth tips of the induction motor are very highly saturated by the tangential part of the total flux, especially at the short circuit. Actual values of the saturations were obtained by inverting the solution of the magnetic circuit. Air gap induction distribution under the tooth was assumed and the necessary form of the tooth tip was derived therefrom. From these considerations, the saturation factor for the inductance reduction was derived with the proof that its value depends mainly on the peripheral loading of the machine at a given load and very little on the tooth form.