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Capacitance of a Random Conductor

A PWM with un...

Question

A PWM with unipolar switching scheme is used in an inverter, with fundamental frequency = 49 Hz and $M_{f} = 38$ . Which of the following harmonic frequency is present in the output ?

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Solution

In unipolar switching,
$Harmonic order, h = j (2 m_{f}) \pm k$
$h = j 76 \pm k$
$f_{H} = (j 76 \pm k) \times 49$
$j = 1, k = 1$
$\Rightarrow f_{H} = 3675 H z, 3773 H z$

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