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GATE EE 2015 Set 1 — Question 59

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NAT+2 / -0MediumGenerator & Motor CharacteristicsDC MachinesElectrical MachinesLosses & Efficiency

Electrical Machines → DC Machines → Generator & Motor Characteristics

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Question

A DC motor has the following specifications: 10 hp10\text{ hp}, 37.5 A37.5\text{ A}, 230 V230\text{ V}; flux/pole =0.01 Wb= 0.01\text{ Wb}, number of poles =4= 4, number of conductors =666= 666, number of parallel paths =2= 2. Armature resistance =0.267 Ω= 0.267\text{ }\Omega. The armature reaction is negligible and rotational losses are 600 W600\text{ W}. The motor operates from a 230 V230\text{ V} DC supply. If the motor runs at 1000 rpm1000\text{ rpm}, the output torque produced (in Nm) is _______.
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