Description
Problem 4.1 (50 points)
Do Textbook (Fundamentals of Power Electronics 2nd Edition) Problem 4.7 (pg. 105).
Problem 4.2 (50 points)
The buck-boost converter shown below is implemented with a MOSFET and a diode. The
MOSFET can be modeled as ideal, but the diode exhibits “snappy” reverse-recovery
characteristics, with reverse recovery time tr and recovered charge Qr
. In addition, the inductor
has winding resistance RL. The converter operates with small inductor current ripple and small
capacitor voltage ripple. Derive an equivalent circuit that models the dc components of the
converter waveforms and that accounts for the loss elements described above.
Problem 4.3 (50 points) [Additional problem only for ECEN 5797 students]
Do Textbook (Fundamentals of Power Electronics 2nd Edition) Problem 4.8 (pg. 105).
