Question

Advantages of single phase voltage controller

Answer 1

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fixed frequency alternating current (AC) electrical input supply to obtain variable voltage in output delivered to a resistive load.

Answer 2

DC voltage advantages : 1) DC motors have high starting torque , 2) best for charging of storage batteries, 3) best for electronic control circuits. ... Over all advantage goes to AC voltage system only .DC voltage can be obtained by rectification method as desired to any out put voltage.