engineering recuitment NCL Assistant Foreman (Trainee) Mock Test 2024 Electrical Machines Alternator and Synchronous Motors
In constant flux control of 3 - φ synchronous motor, at medium and rated frequencies the supply voltage ‘V’ and supply frequency ‘f’ are related as : V = kf, where ‘k’ is a constant But at very low frequencies, the supply voltage should be:
1
greater than kf
2
equal to kf1.6
3
less than kf
4
equal to k√f