Page 331 - Power Electronics Handbook

Output voltage control 321

R.M.S. fundamental as 96 of d.c.
Figun 13.39 Seventh harmonic content for the square modulated unidirectional wave of
Figure 13.37

High frequency
'carrier' wave

output load modulating wave
voltaae waveform

Figure 13.a High-frequency pulse-width modulation with sine modulating wave and
unidirectional switching: (a) modulating waveforms; (b) output waveform