Speed Control of DC Shunt Motors (23)

Speed control of DC shunt motors by armature voltage control and flux control methods and numerical problems on speed control of DC shunt motors.

[piyushkumarsingh]

You have given a great explanation, Thank you for that, I have a question, when Ish decreases then according to I = Ia+Ish the armature current Ia must increase which will reduce the back emf Eb as Eb=V-IaRa and as N is directly proportion to Eb, so N must also decrease and on another side, the decrease in flux increases the speed as it is inversely proportional to it, So what will be the final result ( in short why the Eb here is considered as a constant?)

[sachin]

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