2 5 a). How to control the speed of the DC-separately excited motor at above and below base speed, and explain in detail

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2 5 a). How to control the speed of the DC-separately excited motor at above and below base speed, and explain in detail

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2 5 A How To Control The Speed Of The Dc Separately Excited Motor At Above And Below Base Speed And Explain In Detail 1
2 5 A How To Control The Speed Of The Dc Separately Excited Motor At Above And Below Base Speed And Explain In Detail 1 (73.24 KiB) Viewed 26 times
I have my endsems tommorow , kindly help solving me these two questions entirely with proper steps .Please !!!
2 5 a). How to control the speed of the DC-separately excited motor at above and below base speed, and explain in detail operation along with characteristics and its applications. 5 b). A six pole dc-shunt motor is supplied from 230V with a current of 60A. The armature resistance, field resistance and field flux per pole are 0.312, 10092 and 0.023Wb, respectively. The machine armature is lap connected with 864 conductors along with a the friction torque of 4Nm. Calculate (i) The speed in rpm, (ii) Gross torque developed by the armature, (iii) Starting torque, (iv) Shaft power, (v) Efficiency.
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