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Synchronous Motors

When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor___________?

Synchronous Motors /
When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor___________?

A. remains same as the original value
B. decreases to half the original value
C. tends to becomes zero
D. increases to two times the original value

When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor___________? Read More »

Synchronous Motors

When load on an over-excited or under excited synchronous*motor is increased, rate of change of its armature current as compared with that of power factor is___________?

Synchronous Motors /
When load on an over-excited or under excited synchronous*motor is increased, rate of change of its armature current as compared with that of power factor is___________?

A. more
B. less
C. equal
D. twice

When load on an over-excited or under excited synchronous*motor is increased, rate of change of its armature current as compared with that of power factor is___________? Read More »

Synchronous Motors