Question

Q1. A buck-boost converter has parameters Vs=12V, D=0.6, R=10 Ω, L=10 μH, C= 20μF, and a switching frequency of 200 kHz. (a). Draw and label neatly the following: i. the buck-boost converter. [3 marks] ii. the waveforms for VL IL ID IC

Answer #1

A boost converter has an input voltage Vin= 10 V, switching
frequency fs= 100 kHz, duty ratio d=50%, load resistance RL= 20 Ω,
inductance 100 μH, and capacitance 680 μF.
Qualitatively describe the effect on Io, Δi_L, and Δv_C if
you:
a) Increase the duty ratio
b) Increase the switching frequency
c) Increase the load resistance

A buck-boost converter has an input voltage V_in= 10 V,
switching frequency fs= 100 kHz, duty ratio d= 30%, load resistance
R_L= 20Ω, inductance =100 μH, and
capacitance= 680 μF.
1) Calculate the following values, and include units in your
answers:
a) Average output voltage,V_o
b) Average output current,I_o
c) Average input current,I_in
d) Average current through the inductor in steady-state
e) Peak-to-peak current ripple through the inductor, Δ_iL
f) Average inductor current that will cause the converter to
enter...

A buck converter has an input voltage V in = 24 V, switching
frequency f s = 100 kHz, duty ratio d = 50%, load resistance R L =
10 Ω , inductance 100 μH, and capacitance 680 μF.
1) Calculate the following values, and include units in your
answers :
a) Average output voltage, V_o
b) Average output current, I_o
c) Peak - to - peak current ripple, Δi_L
d) Output current that will cause the converter to enter...

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