New Industria YASKAWA SGM-01VGNK72 SERVO MOTOR 0.87A 200V 100W Made in Japan

Several alternatives have been used in industry to prevent severe damage to induction motors from the above mentioned faults and to avoid unexpected production shutdowns. Schedule of frequent maintenance is implemented to verify the integrity of the motors, as well as to verify abnormal vibration, lubrication problems, bearings conditions, and stator windings and rotor cage integrity. Most maintenance must be performed with the induction motor turned off, which also implies production shutdown.

Usually, large companies prefer yearly maintenance in which the production is stopped for full maintenance procedures. Redundancy is another way to prevent production shutdowns, but not induction motor failure. Employing redundancy requires two sets of equipment, including induction motors. The first set of equipment operates unless there is a failure, in which case the second set takes over. This solution is not feasible in many industrial applications due to high equipment cost and physical space limitations. Thus, in this thesis an alternative to these approaches is proposed.  

Specifically, this thesis addresses electrically detectable faults that occur in the stator windings and rotor cage, namely inter-turn short circuits in stator windings and broken rotor bars. The methods developed in this thesis detect motor faults without the necessity of invasive tests or process shutdowns. Moreover, the presented methods monitor the operating induction motor continuously, so that human inspection is not required to detect motor faults.