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Fig. 2 shows a two-pole, unipolar PWM converter along with the relevant paramete

ID: 1922602 • Letter: F

Question

Fig. 2 shows a two-pole, unipolar PWM converter along with the relevant parameters. The control voltage vc= 0.5V and the switching frequency is 25 kHz. Assume steady-state operation.

(a) Calculate the cycle-by-cycle average (CCA) values - vAN , vBN and vAB

(b) Plot the instantaneous waveforms of vAN (t), vBN (t) and vAB (t) over a switching period.

(c) Calculate the CCA value, ia

(d) Plot the instantaneous waveform of ia

(d) Plot the instantaneous waveform of ia(t) . Make sure to include the ripple current component.




Explanation / Answer

Definitely B

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