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Give two basic speed control scheme of DC shunt motor?

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Question added by Ahmed Fathi , Senior Electrical Engineer , Al Fawzani for trading and contracting LTD. company
Date Posted: 2017/11/07
NOORE NAZAR JHAN SHAREEF JOHN
by NOORE NAZAR JHAN SHAREEF JOHN , Electrical Engineer , Fawaz Refrigeration & Air Conditioning

variation of field voltage and adjusting by v/f method

Mostafa  Elyan
by Mostafa Elyan , Electrical site Engineer , al ged

by using flux control method:in this method a rheostat is connected across the field wdg to control the field current.so by changing the current the flux produced by the field wdg can be changed, and since speed is inversely proportional to flux speed can be controlled 2.armature control method: in this method a rheostat is connected across armature wdg.by varying the resistance the value of resistive drop(IaRa)can be varied,and since speed is directly propotional to Eb-IaRa the speed can be controlled

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