Electric motors are one of the most used and important components in the industrial sector. The reliability of these equipment depends very much on giving them the proper maintenance when they really need it. Reliability studies indicate that approximately 50% of motor failures are of the mechanical type and the remaining 50% are of the electrical type.
Vibratec has the necessary tools to verify both the mechanical part (vibrations, ultrasound and thermography) and the electrical part (electrical circuit analysis and thermography).
Among the electrical faults, can be divided into 5 large fault zones, which are:
- Power circuit
- Stator Winding
- Motor rotor (bus fault)
- Air gap
One of the most widely used methods for the detection of electrical failures in motors is the electrical circuit analysis (MCA) motor circuit analysis.
The MCA method consists of analyzing 15 motor variables, including phase impedance, phase angle, phase imbalance, frequency current ratio, mutual inductance between rotor and stator, insulation resistance, etc. The motor is analyzed in this case as if it were, in fact it is, an electric circuit.