EM-II Hunting, Damber winding

Hunting in a synchronous motor is a phenomenon that occurs when __________.

• A) The motor is overloaded

• B) The motor is underloaded

• C) The motor loses synchronism

• D) None of the above

Hunting in a synchronous motor is also known as __________.

• A) Jerk

• B) Cogging

• C) Surging

• D) None of the above

Hunting in a synchronous motor occurs when the __________.

• A) Load on the motor increases suddenly

• B) Load on the motor decreases suddenly

• C) Motor is switched on

• D) None of the above

The main reason for hunting in a synchronous motor is __________.

• A) Uneven distribution of magnetic flux in the stator

• B) Uneven distribution of magnetic flux in the rotor

• C) Uneven distribution of magnetic flux in both stator and rotor

• D) None of the above

The hunting frequency of a synchronous motor is __________.

• A) Equal to the supply frequency

• B) Greater than the supply frequency

• C) Less than the supply frequency

• D) None of the above

Hunting in a synchronous motor can be prevented by __________.

• A) Using a damper winding

• B) Using a squirrel cage rotor

• C) Using a wound rotor

• D) None of the above

The damper winding in a synchronous motor is located __________.

• A) On the stator

• B) On the rotor

• C) Both on the stator and rotor

• D) None of the above

The damper winding in a synchronous motor is used to __________.

• A) Reduce the hunting frequency

• B) Increase the hunting frequency

• C) Eliminate the hunting frequency

• D) None of the above

The damper winding in a synchronous motor is usually __________.

• A) Short-circuited

• B) Open-circuited

• C) Connected to a resistor

• D) None of the above

The use of a damper winding in a synchronous motor __________.

• A) Increases the losses in the motor

• B) Decreases the losses in the motor

• C) Has no effect on the losses in the motor

• D) None of the above