Eliminacja prądów łożyskowych za pomocą łożysk izolowanych

The negative influence of bearing currents on the durability of rolling bearings in the alternating current electric motors are shown. The reasons of bearing current formation in electric motors are given. Examples of bearing races damages of cooperating rolling bearing elements are presented. Analysis of dents distribution in the roller, roll-neck and ball bearing races are made. Different types of insulated bearings are presented as well, applied to bearing currents elimination. Conclusions drawn from laboratory researches are presented in chapter 6.