During hunting of a synchronous motor ___

Electrical Engineering MCQ Electrical Machines MCQ
1

During hunting of a synchronous motor

A. field excitation increases.
B. damper bar develops torque.
C. negative phase sequence currents are generated.
D. harmonic are developed in the armature circuit.

Show Answer

Answer: A

Share your understanding of this question with the correct explanation.

2

The answer is A. field excitation increases.

Hunting is a phenomenon that occurs in synchronous motors when there is a sudden change in load. The rotor of the motor will begin to oscillate around its synchronous speed. This oscillation can cause the motor to lose synchronism and stall.

To prevent hunting, the field excitation of the motor can be increased. This will increase the torque produced by the motor and help to stabilize the rotor speed.

Here are some additional details about hunting:

  • It is a phenomenon that occurs in synchronous motors when there is a sudden change in load.
  • It can cause the motor to lose synchronism and stall.
  • To prevent hunting, the field excitation of the motor can be increased.

Hunting can be a serious problem in synchronous motors. It can cause the motor to lose synchronism and stall. This can lead to power outages and other problems.

Here are some ways to prevent hunting:

  • Increase the field excitation of the motor.
  • Use damper bars.
  • Use a soft starter.
  • Use a variable frequency drive (VFD).

Increasing the field excitation of the motor is the most effective way to prevent hunting. Damper bars can also help to prevent hunting, but they are not as effective as increasing the field excitation.

A soft starter or a VFD can also be used to prevent hunting. These devices can gradually increase the speed of the motor, which helps to prevent the sudden changes in load that can cause hunting.