1- A switch-mode dc-dc converter is operating at a switching frequency of 20kHz, and Vd=150V. The average current being drawn by the dc motor is 8.0 A. In the equivalent circuit of the dc motor, Ea=100V, Ra=0.25 ohm, and La=4mH.
a). plot the output current and calculate the peak-to-peak ripple and
b). plot the dc-side current
2- the motor goes into regenerative braking mode. The average current being supplied by the motor to the converter during braking is 8.0A.
a). Plot the voltage and current waveforms on both sides of this converter.
b). Calculate the average power flow into the converter
if the motor is rotating in the reverse direction, with the same current draw and the same induced emf Ea value of the opposite polarity