Air gap measurement in large electric motors

Large electric motors are used in the mining industry for rough operations such as rock grinding. With continous usage, certain imbalances and damages in the motor are bound to happen, that results in high financial losses and small operating life of the machine.  Due to these imbalances, the rotor can come into contact with the stator that could damage the motor. Therefore, these large motors should be consistently monitored during running time, to ensure a reliable operation for a long time. Sensors are used to monitor the concentricity of the motor during the running time.

Bestech Australia provides capaNCDT 6220 capacitive sensors from Micro-Epsilon designed for monitoring the rotor,to check if it is running smoothly in combination with the stator. The sensor enables 100 per cent reliable inspection and is resistant to the magnetic fields that occur regularly inside the electric motor.  The measurements are non-contact that ensures long-term stability and reliability.