EE 2950 Chapter : Chapter 16
Document Summary
E16. 1 the input power to the dc motor is. Substituting values and solving for the source current we have. E16. 3 repeating the calculations of example 16. 2, we have (a) (b) At ivp t p m p t f pull. E16. 4 referring to figure 16. 15 we see that. E16. 5 referring to figure 16. 15 we see that. Because if remains constant the value of k is the same value as in. Furthermore the loss torque also remains constant at 11. 54 nm, and the developed torque remains at 261. 5 nm. Thus the armature current is still 117. 4 a. Thus the motor speeds up when vt is increased. E16. 9 with ra = 0 and fixed vt, the shunt motor has constant speed. E16. 10 decreasing vt decreases the field current and therefore the flux . In the linear portion of the magnetization curve, flux is proportional to the field current.
