In June 2024
Answer to Question #315396 in Mechanical Engineering for resho
A dc shunt motor after running for several hours on constant mains of 350 V takes a field current of 1,6 A. If the temperature rise is known to be 40°C, what value of extra circuit resistance is required to adjust the field current to 1,6 A when starting from cold at 20°C?
The temperature coefficient of the motor’s armature material is 0,0043/K at 20°C.
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