Slip Ring Rotor Resistance Calculation

I am a student of electrical enginnering it helped me alot in my electrical paper of chapter slip ring.

Slip ring rotor resistance calculation.

Slip ring i m provides high starting torque. These motors are usually started with full line voltage applied across its terminals. The value of starting current is adjusted by adding up external resistance to its rotor circuit. The resistance value of 9 times higher than of a slip ring rotor resistance is connected externally to experience maximum starting torque.

Only for you 32 662 views. Calculation table for slip ring induction motor used for crane hoisting application. Incase of a squirrel cage induction motor the value of rotor resistance is very low which leads to heavy starting current requirement. This gives the three phase motor having three sets of resistors each set having resistors about 6 to 8 connected in.

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. Starting of slip ring induction motors. We can able to add external resistance through slip ring in the rotor circuit. 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.

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. Prity 24 february 2014 at 03 02. The stator is the same as is used with a standard squirrel cage motor. Overhead crane slip ring motor resistance calculation duration.

The rotor had a external resistance which is connected to it. Rotor resistance starter in three phase induction motor electrical academy. So at the starting because of the high rotor resistance we get low starting current which helps to start motor without any damage. Rotor resistance starting slip ring induction motor srim.

We saw some of the applications of this motor. But in case of slip ring motors the rotor resistance is increased by the addition of external resistance. Actually a slip ring motor had a rotor which is known as wound rotor.