Page 323 - Power Electronics Handbook

Output voltage control 3 I3

0 0.1 0.2 0.3 0.4 0.5 0.6
2DK
Figure 13.34 Harmonic content for a quasi-square wave plotted against pulse width

a two-pulse unidirectional waveform. Choosing the values of B, AI, A2 and
o to satisfy equations (13.7) and (13.8) will give the nth Fourier coefficient,
as in equation (13.9).
Ai + A2
B= (13.7)
2
A2 - A1
o= (13.8)
2

sin
6, = - B sin no (13.9)
8VB
n
nn
Obviously, it is possible to arrange the pulses symmetrically in a half
cycle, and this is considered later when this technique is extended to a large