What is the difference between the construction of a squirrel cage rotor and a slip ring rotor in a
What is the difference between the construction of a squirrel cage rotor and a slip rings rotor in a 3ph motor?
The copper conductors in a squirrel-caged motors are just short-circuited in its ends while in a slip ring motor, the conductors through bore slip rings are connected in series to a star point. The resistance in the latter are higher than that of the former motor. The windings are connected in series with an external resistance through carbon brushes to increase its resistance during start-up. The slip ring motors usually coaxial rotary joint have higher starting torque and lower starting current than squirrel-caged motors.