Question

5. Consider the the SEPIC converter shown in of Fig. 4 о, 01 Figure 4: Sepic Converter a) Sketch the diode current waveform for CCM operation. Find its peak value, in terms of the ripple magnitudes ΔΙ.and Δ1L2 and the dc components li and 12 of the two inductor currents Ii(t) and I2(t) respectively b) Derive an expression for the conditions under which the SEPIC operates in the discontinuous conduction mode. Express your result in the form K< Keni(D) and (20 points) give the formulas for Kand Ken(D) 6. DCM conversion ratio analysis of the SEPIC of Fig. 4 a) Suppose that the converter operates at the boundary between CCM and DCM, with the following element and parameter values D-0.225 100 kHz V 120 V -47 C2-200 Sketch the diode current Ip(t) waveform and the inductor current waveforms and I(t) and I2t) Label the magnitudes of the ripples and de components o f these waveforms. b) Suppose next that the converter operates in the discontinuous conduction mode, with a different choice of parameter and element values. Derive an analytical expression for the de conversion ratio M(D, K) c) Sketch the diode current waveform itand the inductor current waveforms I(t) and I2) and for operation in the discontinuous (20 points) conduction mode

Answer 1

for 5th answer pls post it again