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Answer :

Speed torque characteristic of a repulsion induction motor is similar to that of a D.C. compound motor.

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Answer : In repulsion motor, maximum torque is developed when brush axis is at 45° electrical to the field axis.

Answer : The repulsion-start induction-run motor is used because of high starting torque.

Answer : For the same H.P. rating and full load speed, following motor has poor starting torque differentially compounded.

Description : In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high ... the outer high resistance winding. (D) Large current flows through the inner low resistance winding.

Answer : In a double squirrel cage induction motor, good starting torque is produced as Large current flows through the outer high resistance winding.

Description : Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be

Answer : Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be 25 N -m