Question

In a two phase cylindrical rotor synchronous machine, torque Te is _____________

(a) constant at some instant of time

(b) changing at every instant of time

(c) constant at every instant of time

(d) changing at some instant of time

The question was asked by my college professor while I was bunking the class.

Asked question is from Elementary Synchronous Machines in chapter Basic Concepts in Rotating Machines of Electrical Machines

Answer 1

Correct option is (c) constant at every instant of time

To explain: Te = IfImMmaxsinδ

We can observe that it remains constant at every instant of time.