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A 230 V DC series motor has the following parameters. Ra=0.25ΩRf=0.1Ω Rotational loss =250 W On full load, the line cu
Posted: Thu Jul 14, 2022 2:44 pm
by answerhappygod
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A 230 V DC series motor has the following parameters. Ra=0.25ΩRf=0.1Ω Rotational loss =250 W On full load, the line current is 40 A and the motor runs at 1200rpm. Assume the linear relationship between the field flux and the field current. (Hint: Tdex =Pm/ω ) i. Determine the torque developed by the motor ii. Determine the speed and the torque developed if the motor draws 20 A. [Ans: Tdov=68.75Nm;N2=2477.8rpm,Tdov2 =17.19Nm]