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Motor Winding Failures
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Electric Motor Problems & Diagnostic Techniques
www.emerson.comStator-related failures account for a large portion of all electrical problems on AC motors. Most stator faults are caused by insulation breakdown which leads to winding failure. They include: 1. Open windings 2. Phase-to-ground 3. Phase-to-phase 4. Turn-to-turn short If the motor keeps running with stator faults, a high current will
VARIABLE FREQUENCY DRIVES THEORY, APPLICATION, …
www.maintenance.orgwinding in order to develop mechanical torque. The stator windings of an induction motor are evenly distributed by 120 degrees electrical. As the three phase current enters the windings, it creates a rotating magnetic field within the air gap (the space between the rotor and stator laminations). The speed