The rotor circuit resistance has significant impact on starting torque the speed at which the breakdown torque occurs and the slip during the normal running operation.
Slip ring rotor resistance calculation.
We can able to add external resistance through slip ring in the rotor circuit.
This gives the three phase motor having three sets of resistors each set having resistors about 6 to 8 connected in.
Rotor resistance starter in three phase induction motor electrical academy.
The stator is the same as is used with a standard squirrel cage motor.
But in case of slip ring motors the rotor resistance is increased by the addition of external resistance.
Incase of a squirrel cage induction motor the value of rotor resistance is very low which leads to heavy starting current requirement.
The value of starting current is adjusted by adding up external resistance to its rotor circuit.
Rotor resistance starting slip ring induction motor srim.
Only for you 32 662 views.
Actually a slip ring motor had a rotor which is known as wound rotor.
7 14 shows how the motor torque speed curve would change if rotor resistance is increased and all other parameters in the motor equivalent circuit stay the same.
I am a student of electrical enginnering it helped me alot in my electrical paper of chapter slip ring.
The rotor had a external resistance which is connected to it.
Overhead crane slip ring motor resistance calculation duration.
Starting of slip ring induction motors.
Calculation table for slip ring induction motor used for crane hoisting application.
The slip ring or wound rotor motor is an induction machine where the rotor comprises a set of coils that are terminated in sliprings to which external impedances can be connected.
The resistance value of 9 times higher than of a slip ring rotor resistance is connected externally to experience maximum starting torque.
Slip ring induction motor speed control the speed control of this motor can be done using two methods which include the following.
These motors are usually started with full line voltage applied across its terminals.
Slip ring i m provides high starting torque.
We saw some of the applications of this motor.
Slip ring or wound rotor motors.