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What Is The Difference Between An AC Motor And A DC Motor?

Mar 20, 2017

What Is The Difference Between An AC Motor And A DC Motor?


While both A.C.and D.C.motors serve the same function of converting electrical energy into mechanical energy, they are powered, constructed and controlled differently. The most basic difference is the power source. A.C. motors are powered from alternating current (A.C.) while D.C. motors are powered from direct current (D.C.), such as batteries, D.C. power supplies or an AC-to-DC power converter. D.C wound field motors are constructed with brushes and a commutator, which add to the maintenance, limit the speed and usually reduce the life expectancy of brushed D.C. motors. A.C. induction motors do not use brushes; they are very rugged and have long life expectancies. The final basic difference is speed control. The speed of a D.C. motor is controlled by varying the armature winding’s current while the speed of an A.C. motor is controlled by varying the frequency, which is commonly done with an adjustable frequency drive control.


Company Name: TT Motor (HK) Industrial Co., Ltd.

Contact Person: Lulu Fung

E-mail: lulu@ttmotor.com

Mobile Phone: (86)158 1855 9903

Tel: (86)755-8250 1105

Add: 4th Floor, C Building, Huilongda Industrial Park, Shilong Community, Shiyan, Bao'An District, ShenZhen 518108, China

Website: www.ttmotor.com