Tag: Starting Torque

Chopper Resistance in the Rotor Circuit

Chopper Resistance in the Rotor Circuit: Speed control by means of slip variation can be achieved by employing a variable resistance Chopper Resistance in the Rotor Circuit. From the equations it is clear that the maximum value of torque does not depend upon the value of rotor resistance. However, the rotor resistance influences the slip […]

Torque Slip Characteristic

Torque Slip Characteristic: The expression for Torque Slip Characteristic (T(s)) is easily obtained by finding the Thevenin equivalent of the circuit to the left of ab in Fig. 9.12. The circuit then reduces to Fig. 9.13 in which it is convenient to take VTH as the reference voltage. Equation (9.22) is the expression for torque […]