Christoph Haederli - Les thèses en ligne de l'INP - Institut National ...
Christoph Haederli - Les thèses en ligne de l'INP - Institut National ...
Christoph Haederli - Les thèses en ligne de l'INP - Institut National ...
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ML Converter Topologies 45<br />
Limitation by appar<strong>en</strong>t output switching frequ<strong>en</strong>cy<br />
Normalized total FC <strong>en</strong>ergy<br />
3<br />
2<br />
1<br />
0<br />
2 4 6 8 10<br />
MC<br />
SMC<br />
ANPC 1 SCx+FCx<br />
ANPC 2 FCx+SCx<br />
ANPC 3 FCx+FCx<br />
FSx+FCx<br />
FC2 * x<br />
N = levels - 1<br />
Figure 40, normalized FC <strong>en</strong>ergies for a giv<strong>en</strong> appar<strong>en</strong>t output switching frequ<strong>en</strong>cy scaling with N<br />
(f out = f base * N)<br />
Limitation by appar<strong>en</strong>t output switching frequ<strong>en</strong>cy<br />
Normalized total FC <strong>en</strong>ergy<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
0<br />
2 4 6 8 10<br />
MC<br />
SMC<br />
ANPC 1 SCx+FCx<br />
ANPC 2 FCx+SCx<br />
ANPC 3 FCx+FCx<br />
FSx+FCx<br />
FC2 * x<br />
N = levels - 1<br />
Figure 41, normalized FC <strong>en</strong>ergies for a giv<strong>en</strong> constant appar<strong>en</strong>t output switching frequ<strong>en</strong>cy<br />
(f out = f base)<br />
Care must be tak<strong>en</strong> wh<strong>en</strong> comparing the values from Figure 38 to Figure 41. Figure 38 and Figure<br />
39 repres<strong>en</strong>t physical limitations giv<strong>en</strong> by the hardware <strong>de</strong>sign, whereas the appar<strong>en</strong>t output<br />
frequ<strong>en</strong>cy used as limiting factor in Figure 40 and Figure 41 can be chos<strong>en</strong> freely as long as it does<br />
not interfere with the physical limitations. Therefore, the amplitu<strong>de</strong>s may vary according to the<br />
<strong>de</strong>signer’s choice. The scaling laws with increasing levels and the relationship betwe<strong>en</strong> the<br />
requirem<strong>en</strong>ts of the differ<strong>en</strong>t topologies are the main interest in those two last figures.<br />
3.7.5 Conclusion for MC based topologies<br />
SMC, ANPC1, ANPC2 and ANPC3 seem to provi<strong>de</strong> a good tra<strong>de</strong>off betwe<strong>en</strong> flying capacitor<br />
<strong>en</strong>ergy, switch requirem<strong>en</strong>t and controllability. SMC and ANPC2 provi<strong>de</strong> lowest flying capacitor