Friday, January 2, 2015

Why less loss occurs when we use DC supply than AC supply?


  • Since the frequency DC of supply is zero, capacitance and inductance does not exists.

  • Due to the absence of skin effect, the resistance of DC systems is low as compared to ac systems

  • Rac = 1.25 to 1.75*Rdc, so less power loss in DC system than AC system.

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