Question: a. Calculate the field current required to achieve operation at 15.2 N m torque and 1800 r/min. Calculate the corresponding PWM duty cycle D.

a. Calculate the field current required to achieve operation at 15.2 N · m torque and 1800 r/min. Calculate the corresponding PWM duty cycle D.

b. Calculate the field current required to achieve operation at 15.2 N · m torque and 1500 r/min. Calculate the corresponding PWM duty cycle.

c. Plot the required PWM duty cycle as a function of speed over the desired speed range of 1500 to 1800 r/min.

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