Electric Machine Daily Quiz #13

Choose correct statement-

1. Salient rotor has more space harmonics
2. Salient rotor has more flux harmonics
3. Cylindrical rotor has more flux harmonics
4. None

Cylindrical and Salient pole machines respectively have-

1. Uniform and uniform air gap flux
2. Sinusoidal and sinusoidal air gap flux
3. Uniform and sinusoidal air gap flux
4. Sinusoidal and Uniform air gap flux

Choose correct statement-

1. Induced voltage in the synchronous machine _____ the flux linkage.
2. Lags
3. Leads
4. Is in phase with
5. Equals to

Every un-chorded wdg has a coil span of (in electrical degrees)-

1. 120
2. 180
3. Depends on machine’s poles
4. Depends on type of un-chording of wdg

To eliminate nth harmonic, the chording angle @ is equal to-

1. 90/n
2. 180/n
3. 360/n
4. None