Figure 5 shows a full bridge converter with Vd = 300V. Please answer the followi

Question

Figure 5 shows a full bridge converter with Vd = 300V. Please answer the following true or false questions based on the structure of Figure 5. A. (true or false?) Depending on the switching signals of the four semi-conductor switches, this converter can act as a DC-DC converter or a DC-AC converter. B. (true or false?) lf this converter can act as a DC-DC converter, the waveform of the output voltage v_out is a flat DC value C. (true or false?) If this converter can act as a DC-AC converter with sinusoidal PWM, the waveform of the output voltage v_out is a pure sine waveform. D. (true or false?) The two waveforms (in solid line) shown in Figure 6 can be obtained with the converter shown in Figure 5 with different switching signals. Waveform (a) is the waveform of v_N when using square waveform technique while waveform (b) is the waveform of v_N when using sinusoidal PWM technique. E. (true or false?) Both (a) and (b) of Figure 7 show the waveforms of v_out when this converter acts as a DC-DC bipolar converter. F. (true or false?) Both (c) and (d) of Figure 7 show the waveforms of v_out when this converter acts as DC-DC unipolar converter. G. (true or false?) Both (a) and (b) of Figure 7 show the waveforms of v_out when its DC value is positive. H. (true or false?) Both (c) and (d) of Figure 7 show the waveforms of v_out when its DC value is negative. I. (true or false?) Both (a), (b), (c) and (d) of Figure 7 show the waveforms of v_out when the switching frequency is the same value. J. (true or false?) Figure 7 (e) shows the waveform of v_out when this converter acts as a DC-AC bipolar converter with sinusoidal PWM.

Explanation / Answer

Ans A: True

This Converter depends on switching signals of the four semiconductor switches. It will act as DC-DC converter or DC-AC Converter.

Ans B: False

The waveform of output voltage is not the fat DC value.

Ans C: False

The output is not pure sine waveform.

Ans D: True

Ans E: True

Ans F: True

Ans G: False

When DC value is positive only upper half portion will obtained.

Ans H: False

Ans I: True

Ans J: False

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