Slip Ring Rotor Resistance Calculation

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Slip ring rotor resistance calculation.

We can able to add external resistance through slip ring in the rotor circuit. But in case of slip ring motors the rotor resistance is increased by the addition of external resistance. Slip ring i m provides high starting torque. These motors are usually started with full line voltage applied across its terminals.

Actually a slip ring motor had a rotor which is known as wound rotor. Slip ring or wound rotor motors. This gives the three phase motor having three sets of resistors each set having resistors about 6 to 8 connected in. The resistance value of 9 times higher than of a slip ring rotor resistance is connected externally to experience maximum starting torque.

Rotor resistance starting slip ring induction motor srim. Prity 24 february 2014 at 03 02. So at the starting because of the high rotor resistance we get low starting current which helps to start motor without any damage. Overhead crane slip ring motor resistance calculation duration.

Incase of a squirrel cage induction motor the value of rotor resistance is very low which leads to heavy starting current requirement. 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. We saw some of the applications of this motor. Slip ring induction motor speed control the speed control of this motor can be done using two methods which include the following.

The rotor had a external resistance which is connected to it. The stator is the same as is used with a standard squirrel cage motor. 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. 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.

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