Question:
In a single pulse width modulated inverter, to eliminate the third harmonic, pulse width must be
In a single pulse width modulated inverter, to eliminate the third harmonic, pulse width must be
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For harmonic elimination in PWM inverters, specific pulse widths like \( 120^\circ \) are pre-calculated to nullify certain harmonics like the 3rd.
Updated On: May 4, 2025
- \(0^\circ\)
- \(120^\circ\)
- \(150^\circ\)
- \(180^\circ\)
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The Correct Option is B
Solution and Explanation
In single-pulse width modulation (PWM), to eliminate the 3rd harmonic component in the output waveform, the pulse width \( \alpha \) is chosen such that it satisfies the harmonic elimination condition. It is a well-established result that a pulse width of \( 120^\circ \) effectively cancels out the third harmonic from the output spectrum.
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