Question

what is the effect of armature voltage when firing angle is decreased​

Answer 1

The mean voltage V dc can be altered by varying the firing angle, which also incidentally alters the ripple (i.e. V ac ). The ripple voltage causes a ripple current to flow in the armature, but because of the armature inductance, the amplitude of the ripple current is small.

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Answer 2

Answer:

he supply power factor decreases as the firing angle is increased keeping motors' speeds constant. Fig. 21 that, the motor current ripple factor of M2 increases with the increase of either the firing angle or the motor speed N2