It is very much obvious that many of us know what is the function of motor. Many of us know better about the operating principle as well. By definition in general, An electric motor is an electrical machine that converts electrical to mechanical energy.In an electric motor the moving part is the rotor which turns the shaft to deliver the mechanical power. Mainly there are two parts of motor, they are stator and rotor. The stationary part is the stator, usually has either windings or permanent magnets. The rotor usually has conductors laid into it which carry currents that interact with the magnetic field of the stator to generate the forces that turn the shaft. However, some rotors carry permanent magnets, and the stator holds the conductors. In order to categorize any motor, its rotor plays a vital role. But, although we are very much attached to theoretical part, many of us cannot identify the type of motor by viewing its rotor.
The figures given below shows some of the rotor from which the motor type can be identified. These pictures are taken by me during one of the training program. Hope you will be benefited.
Fig. 1: Rotor of DC Motor
Fig. 2: Rotor of Phase Wound Motor
Fig. 3: Rotor of Squirrel Cage Motor
Fig. 4: Rotor of Synchronous Reluctance Motor
Fig. 5: Rotor of Synchronous Motor
–ANAND MANDAL
E-mail: anandkalyaneee@gmail.com
World of Electrical Engineering. 