USING ANALYSIS OF STATOR CURRENT FOR SQUIRREL-CAGE INDUCTION MOTOR ROTOR FAULTS DIAGNOSTICS

Among electric motors, induction motors are the most used both in home appliances and in various industries. The simplicity and ruggedness of squirrel-cage induction motor make it by far the most commonly used type of electric motor. As induction motors have become quite common in nowadays world, they are often used in critical duty cycles, where different failures can mean costly downtime and major economic expenses. To minimize those expenses, it is often reasonable to use condition monitoring or diagnostic systems, in order to find and define the failures before it is too late or not reasonable to repair the faulty motor. This paper compares three diagnostic methods used on a three-phase squirrel-cage induction motor with broken rotor bars and analyses the possibilities of induction motor fault diagnostics via the analysis of stator current.