4. A PMDC motor has the following parameters:

R₂=0.352; KE=0.5 v/rad/sec; KT = 0.5 NM/A

a. Plot the Speed (y-axis) vs Toque (x-axis) curves for operating voltage values of 100 v, 75 v, and 50v.

b. What is the Speed Regulation constant (SRC) for this motor.

c.

The motor is driving a load that remains at 3 Nm independent of speed. Calculate the voltage

required to drive the load at 1,500 rpm in steady state.