Characteristics of a Squirrel-Cage Rotor
The squirrel-cage rotor is a rotating part that is used in induction motors. These rotors are more efficient than most others operating in the same class. It features a more intrinsic winding of rotors (more than one). Generally, current flows in every winding. There are no brushes involved in the designing thereby making it simpler. These rotors have high copper conductivity due to which designing is better. Squirrel-cage motor has a cylindrical shape with bars of aluminum and copper.
The Basic Operation of a Rotor
A magnetic field is induced in the stator windings by the rotor. The relative motion produces the electric current in conductive bars.
The Basic Operation of a Squirrel-Cage Motor
The basic procedure of squirrel-cage motor is as follows. When an AC voltage is applied to the motor, a magnetic field is induced. If there are copper windings inside the motor, then electric current is produced thereby resulting into another magnetic field.
The General Operation of a Squirrel-Cage Rotor
If it is placed by the rotor, then the leakage flux will be very low and results in small reactance of the circuit. If leakage reactance is high, small amount of flux is likely to reach the stator. There are various designs available in squirrel-cage rotor. Different types of rotors are placed in the motor according to the design and requirement.
The reasons why these rotors are considered so efficient are:
- A very simple design
- No complex geometry
- Easy method of starting and operation
- Easily controls all motor operations
- Starting torque is constant in squirrel-cage ring
Many AC motors are constructed using squirrel-cage rotor. This rotor has multiple windings which make the rotor work more efficiently. Basically, the design structure of this rotor controls the various characteristics of the motor. The geometrical structure of the rotor determines the availability of torque at various measures. This has a direct effect on the static torque.
The squirrel-cage rotor for AC motors is simple to understand, more reliable, highly efficient and widely available. The maintenance of the motor is also very simplistic with no special efforts being required. The cost of squirrel cage motors is not very high but it requires proper implementation. Successful implementation of the rotor will help in the proper functioning of the motor. All the operations can easily be controlled by the rotor.