advantage of ac & dc motors?

Answer 1

dc motors were used historically to give speed control as it was relatively simple to do without complex electronics which, of course, didn't exist. Since the development of high power electronics, VFD's have become so much better (A modern vector drive may give better low speed torque than its dc equivalent) so you will not see dc much because they are higher maintenance (brushes, commutators etc). An ac induction motor has no brushes etc.

Answer 2

Advantages of AC
1.AC can be transformed
2.AC generators have fewer moving parts and are thus easier and cheaper to maintain
3.AC produces less heat, friction and are lighter and more efficient than their DC conterparts

Advantages of DC
1.DC does not need as much insulation as DC has no high frequency electromagnetic radiation.
2.DC generators also produce a back emf, but the transmission of DC has no energy loss due to induction in adjacent lines and metal structures.

https://www.electrikals.com/products/rm-motors/havells?mid=28&cid=641&page=1&pagesize=20

Answer 3

DC motors are also used where controlling speed and torque are important. Also the starter motor in a car runs off a (DC) battery and the DC motors that operate windows and seat positions in a car are small and powerful because they use compact powerful permanent magnets. The battery driven electric DC motors in many forklift trucks permit portable power (no power cables). Golf carts use portable DC batteries too.

Answer 4

ac motors are instantaneous but they dont give u much power but when it comes to dc motors they deliver u much power but thats too complex to run a dc motor and also the dc motors give u contant speed also