Inspection of induction motor

There are some point how to check or inspect the induction motor which are given below,

• check the outside side of the motor: check the motor has any of the following issues on the outside which are given below,

• Broken mounting holes or feet.
• Darkened paint in the middle of the motor (indicating excessive heat).
• Evidence of dirt and other foreign matter having been pulled into the motor windings through openings in the housing.

• Nameplate on the motor: check the following thing on nameplate which is given below,

• Manufacturer’s Name — the name of the company the made the motor.
• Model and Serial Number — information that identifies your particular motor.
• RPM — the number of revolutions the rotor makes in one minute.
• Horsepower — how much work it can perform.
• Wiring diagram — how to connect for different voltages, speeds and direction of rotation.

• Bearing: check the bearing because of it allows the shaft or rotor assembly to turn freely and smoothly in the frame. The movement of the shaft should be smooth and clean. If there is any indication of uneven movement of the rotor or if you hear a scraping or grinding sound, there may be a problem with the bearings that needs to be corrected.

• Fan: The fan is very important for helping to keep the motor cool. A visual inspection of the fan may show that it is damaged or that it has become obstructed in some way or another. If any damage is found or if it has a significant amount of dirt in the area of the fan, it could indicate that overheating was a problem.

• Winding: check the resistance’s value using ohm meter and Check that the windings are not open or blown.
• The basic parameter:  you should check the basic parameter such as current, voltage, power and the resistance of the motor.

Induction motor