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Power Electronics and Motor Drives
book

Power Electronics and Motor Drives

by Bogdan M. Wilamowski, J. David Irwin
October 2018
Intermediate to advanced content levelIntermediate to advanced
1015 pages
40h 24m
English
CRC Press
Content preview from Power Electronics and Motor Drives
DC–AC Converters 14-11
e frequency modulation index is useful to know where the harmonic content of the switched or
PWM waveform are located in the corresponding spectrum, as shown in Figure 14.9. Note that for the
qualitative case illustrated in Figure 14.9, the carrier signal has 15 cycles compared to the reference,
hence m
f
= 15. erefore, the main or strongest harmonic component is located at n = 15. Each main
harmonic is accompanied by a group of sideband harmonics located at m
f
± 2 and m
f
± 4, therefore in
the spectrum of Figure 14.9b, some lower order harmonics located at n = 11 and n = 13 are visible. ese
harmonics appear due to
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Publisher Resources

ISBN: 9781439802861