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In a single-pulse modulation of PWM inverters if pulse width is 120° then
  • a)
    5th harmonic will be eliminated
  • b)
    3rd harmonic will be eliminated
  • c)
    7th harmonic will be eliminated
  • d)
    none of the above
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
In a single-pulse modulation of PWM inverters if pulse width is 120&de...
The rms value of amplitude of harmonic voltage of a single, pulse modulated wave is given by

(where, p = width of pulse an Vdc = supply dc voltage)
If the 3rd harmonic Is to be eliminated, then
EL3 = 0
i.e. 
or, 
or, 
= Required pulse width
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In a single-pulse modulation of PWM inverters if pulse width is 120° thena)5th harmonic will be eliminatedb)3rd harmonic will be eliminatedc)7th harmonic will be eliminatedd)none of the aboveCorrect answer is option 'B'. Can you explain this answer?
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