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In the multiple-pulse width modulation method, the Fourier coefficient an is

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in Power Electronics by (27.1k points)
In the multiple-pulse width modulation method, the Fourier coefficient an is

(a) (Vs/π) [ cos(nπ/2) cos(nd) ].

(b) 0

(c) (4Vs/nπ) [sin(nπ/2) sin(nd)].

(d) (2Vs/nπ) [sin(nπ/2) sin(nd)].

The question was asked by my college professor while I was bunking the class.

Query is from PWM Inverters-2 topic in chapter Inverters of Power Electronics

1 Answer

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by (45.1k points)
The correct choice is (b) 0

To elaborate: As the positive and the negative half cycles are identical the coefficient an = 0.

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