Q.

A 4-point starter is used to start and control the speed of a 

  • Adc shunt motor with armature resistance control
  • Bdc shunt motor with field weakening control 
  • Cdc series motor
  • Ddc compound motor 
Correct Answer : (B)

dc shunt motor with field weakening control 

Hints :

A 4-point starter is used to start and control the speed of a dc shunt motor with field weakening control.

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A dc shunt motor is driving a constant torque load with normal excitation. If the filed current is halved then the motor will run at 

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A dc shunt motor is driving a mechanical load at rated voltage with normal excitation. If the load torque is increased to double of the normal one, the speed of the motor will

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