Stator insulation

The insulation of the winding of the stator will be responsible to prevent the passage of electric current from the conducting wires to the stator plating. In addition, it will protect the winding of erosive agents from the environment and will help in conducting the heat generated by the losses to the outside. The total insulation of the winding causes a combination of insulation, from the slot where the coils are inserted, to the impregnation resin of the winding, the enamel in each winding wire and the insulation between phases. The IEC 60034-1 standard establishes the classes of insulation, each with its temperature limit, ie the higher temperature that the insulation system can withstand without affecting its life.

The MIT being a robust machine is dimensioned so that its useful life is determined by the longevity of the stator winding insulation. The life of the insulation is reduced because of the temperature, but also due to the action of humidity and vibration until it can not withstand the applied voltage and cause a short circuit. An increase of 10 ° C above the thermal class limit of the insulation system can reduce the half-life of the engine.

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