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Which the purpose for DC Motor to use back EMF? State the most important purpose?

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Question added by AbderraZak Dabbaghi , Electrical Engineer , ValbrunaASW, Inc.
Date Posted: 2017/05/15
Engshams Civil
by Engshams Civil , مهندس مدني عام , مكتب هندسي

Thanks for the invite

 and agree with answer colleagues and the God bless

kishor l s
by kishor l s , electrical engineer , Wyndham

the back emf developed along coil reduce current flow through it,, and will help coil stay away from getting hot fast.  :)

Sadeq Al-Abbad
by Sadeq Al-Abbad , Service Specialist , Halliburton Energy Services Inc

the best answer of mr.Golleagues thanks for invitation

hisham abu dagga
by hisham abu dagga , Project Manager / مدير مشاريع , مؤسسة عبدالكريم العواض للمقاولات

Thank you for the invitation

Agreed with answer colleagues

With greetings and appreciation

AbderraZak Dabbaghi
by AbderraZak Dabbaghi , Electrical Engineer , ValbrunaASW, Inc.

The induced EMF developed when the rotating conductors of the armature between the poles of magnet, in a DC motor, cut the magnetic flux, opposes the current flowing through the conductor, when the armature rotates, is called back EMF. Its value depends upon the speed of rotation of the armature conductors. In starting, the value of back EMF is zero.

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