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A direct up converter connects two external systems, as shown in Fig. 6.30. Assume that L and C are large enough that ripple is not a concem. As a function of Ro/R and the duty ratio D, find expressions for: (a) V./V (b) the efficiency of the system, -/Pi, where Pi is the power from the source 6.10 and Po is the power delivered to Ro (c) the duty ratio at which the output voltage is maximized. R, Ro Figure 6.30 The direct up converter analyzed in Problem 6.10.

engineering   Electrical-Engineering   
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the given direct Up Convent the transistor i ON and the diode conducts kiom DT to T. Whene D 5 duty ratio and T s total time penio d Ri dt Kcしequation at atput.gide今 dt (11) Tramist0γ OFF State ( D14 t. T L. RT KCL at output Sale dt R → Apply Volt-Sec balance tor, inductoYL

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