• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

How Engineering Works

  • Home
  • About Us
  • Electrical Engineering
    • Interview Questions
  • Privacy Policy
  • Disclaimer
  • Contact Us
  • Blog

What are the differences between a DC motor and an AC motor?

January 8, 2018 by Green

DWQA Questions › Category: DC Motor & Generator › What are the differences between a DC motor and an AC motor?
0 Vote Up Vote Down
Green asked 4 years ago
3 Answers
0 Vote Up Vote Down
Dark answered 4 years ago

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 expectancy.

0 Vote Up Vote Down
bemjo answered 4 years ago

Internally DC motor also needs alternating current. The supply which is DC is converted to AC by the commutator. Also in case of DC generator, the internally generated emf is AC, but the output is DC because of commutator which is also called mechanical rectifier in case of DC generator. 
In AC motors as the supply is AC, there is no commutator present.

0 Vote Up Vote Down
reeta answered 4 years ago

DC motor is the rotating motor that is capable of converting DC energy into mechanical energy (DC motor) or converting mechanical energy into DC energy.
AC motor is used to implement the AC power and mechanical energy conversion. Due to the great development of Veichi AC power systems, AC motors has become the most commonly used motors.

Primary Sidebar

Related Questions

  • Why do we need a starter to start a DC motor? asked by
  • Why are “equalisers” not used in wave winding? asked by admin
  • Can a DC motor be converted into a DC generator? asked by
  • What is the difference between the speed and the torque of a motor? asked by

INTERVIEW QUESTIONS

MCQ or Objective





Recommended Post

MCQ on Electromagnatism – 1

MCQ on Alternator – 3

MCQs on DC Machine

Electric current

Ten important things about DC Motors

Categories

  • Electrical Articles (19)
  • Electrical MCQ (75)
  • Electrical Questions (11)
  • Interviews Questions (7)
  • IQ Test (1)
  • Uncategorized (10)

About Us | Privacy Policy | Disclaimer


Copyright@2017-2022