GATE EE · 2017 · EE
Question 47: Electrical Machines
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Question 47
EENAT2 marksNeeds review
A 220 V DC series motor runs drawing a current of 30 A from the supply. Armature and field circuit resistances are 0.4 Ω and 0.1 Ω, respectively. The load torque varies as the square of the speed. The flux in the motor may be taken as being proportional to the armature current. To reduce the speed of the motor by 50%, the resistance in ohms that should be added in series with the armature is ________. (Give the answer up to two decimal places.)
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2017EE
GATE EE 2017 · Paper 1
Electrical Engineering · Original paper archive
- Section
- Electrical Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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