A shunt-connected dc motor has zero rotational losses and
Chapter 16, Problem P16.49(choose chapter or problem)
A shunt-connected dc motor has zero rotational losses and RA = 0. Assume that RF + Radj is constant [except in part (d)] and that is directly proportional to field current. For VT = 200 V and Pout = 2 hp, the speed is 1200 rpm. What is the effect on IA and speed if: a. the load torque doubles; b. the load power doubles; c. VT is changed to 100 V and Pout remains constant; d. RF + Radj is doubled in value and Pout remains constant?
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