As these motors have external resistance connected to its rotor circuit the value of starting current is adjusted or kept minimum by increasing the resistance of the rotor circuit.
Slip ring motor rotor resistance starter.
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Slip ring induction motor speed control the speed control of this motor can be done using two methods which include the following.
The resistance value of 9 times higher than of a slip ring rotor resistance is connected externally to experience maximum starting torque.
The starting torque of the slip ring motor is high whereas in squirrel cage motor it is low.
These motors are usually started with full line voltage applied across its terminals.
It reduces the start current 2.
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Can i bridge out the slip rings and use a soft starter on a slip ring motor.
Starting of slip ring induction motors.
Increasing the resistance in the rotor circuit has two effects.
A slip ring motor uses resistors in the rotor circuit to modify the starting characteristics of the slip ring motor.