Electric Machine Daily Quiz #25

Choose correct statement –

1. DC supply gives better performance in a universal motor than AC supply
2. AC supply gives better performance in a universal motor than DC supply
3. DC supply gives same performance as of AC supply in a universal motor
4. No correct statement

The amount of torque needed to move rotor one full step with the stator energized, is called-

1. Détente torque
2. Pull in torque
3. Pull out torque
4. Residual torque
5. None of the above

The max load torque that can be applied to the shaft of the unexcited motor without causing continuous rotation, is called-

1. Détente torque
2. Pull in torque
3. Pull out torque
4. Residual torque
5. None of the above

The torque developed by motor at which motor can be started, stopped, reversed and synchronized for different values of load torques, is called-

1. Détente torque
2. Pull in torque
3. Pull out torque
4. Residual torque
5. None of the above

The torque developed by motor at which motor can run for different values of load torques if already synchronized, but can’t be started, stopped, reversed on command, is called-

1. Détente torque
2. Pull in torque
3. Pull out torque
4. Residual torque
5. None of the above

Which of the following has the minimum possible step angle-

1. Variable reluctance stepper motor
2. Permanent magnet stepper motor
3. Hybrid stepper motor
4. None of the above