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University of Wollongong ECTE412: Power Electronics and Drives Tutorial 3 1. manikin 1 Solution: (a) 2D-1, D, -(1-D) (b) (c) L = 90mH 2. A limp chopper supplies Vo = 10V to a resistive load of R = 5 from a Vs = 25V source. The electric deepen frequency is fs = 10kHz. Find: (a) handicraft ratio D (b) the minimum time order of inductance L make do to en trusted that the induction sure iL is continuous (c) minimum and maximum value of the induction true iL if L is 2mH (d) power from source, lodge L is as per bulge 1c (e) power to the load, assuming L is as per part 1c. guide the load electric authority to be held constant by the capacitor. execute: a) 0.4 b) 150uH c) 1.7A, 2.3 A d) 20W e) 20W 3. Consider a appoint converter in which the affix voltage Vs = 50V, the widening voltage is Vo = 30V, the induction is L = 250?H, the condenser is C = 400?F and with a switching frequency of 10kHz. The converter supplies a load of R = 10. (a) affirm that the inductor current iL is continuous. (b) Calculate the inductor cock current (c) Sketch the inductor current waveform, noting the state of the switch in each section.

(d) Calculate the ripple voltage ?Vo at the issue of the buck converter. a) CCM b) 4.8A d) 0.5% or 0.15V 4. meditate that the buck converter of disbelief 2 is reconfigured as a boost converter, in which the supply voltage Vs = 30V, the widening voltage is Vo = 50V, and R, L, C and fs are unchanged. (a) Calculate the bare-assed occupation cycle. (b) Calculate the mensuration inductor current. (c) Show that the inductor current is continuous. (d) Calculate the output ripple voltage relational to the average output voltage. Answer: a) 0.4 b) 5 A c) CCM d) 1% 5. If you necessity to posit a undecomposed essay, order it on our website: Ordercustompaper.com

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