Open-Loop Buck DC-DC Converter

The objectives in Part 1 of Experiment #2 are to:

• Design and select core and winding turns for inductors and transformers with desired ripple and and out of saturation for the needed currents , construct, test and demonstrate the buck DC-DC converter power stage under open-loop conditions.

(i) Input and out dc voltages and currents, efficiency: 

(ii) Waveforms with names, scales, and salient features,

vD(t), iT (t), iD(t), iL(t), iC1(t), vC1(t):

(iii) Measured inductor current ripple and comparison with calculation: 

(iv) Measured waveforms that allow estimation of the capacitor ESR:

(v) Estimated ESR, PC , comparison to datasheet rated RMS current: 

(vi) Load test data at 15 W output:

(vii) labeled plots of PV voltage, battery current and Vbatt/Vpv versus D

based on LTspice simulations:

Comparison of the battery charging power between MPPT and direct energy transfer:

                                                                                                                                                          DETAILED REPORT