Question

The voltage equation of synchronous motor is?

(a) Ef = Vt + Ia*(ra+jXa)

(b) Ef = Vt – Ia*(ra+jXa)

(c) Ef = Vt + Ia*(ra-jXa)

(d) Ef = Vt – Ia*(ra-jXa)

I have been asked this question in an internship interview.

I want to ask this question from Synchronous Motor Phasor Diagram topic in section Synchronous Motors of Electrical Machines

Answer 1

The correct option is (a) Ef = Vt + Ia*(ra+jXa)

The best I can explain: The voltage equation of synchronous motor is Ef = Vt + Ia*(ra+jXa).