Power Electronics - Engineering

Q1:

A dc series motor is coupled to a load whose torque is proportional to speed. It is fed by a single phase ac supply through a full converter. When speed is 500 rpm, firing angle is 45°. It is desired to raise the speed. It will be necessary to

A decrease the firing angle

B increase the firing angle

C either decrease or increase the firing angle depending on the required speed

D decrease the load torque

ANS:A - decrease the firing angle

No answer description is available.