(i) (ii) Explain sinusoidal-pulse modulation as used in PWM inverters. Discuss the conditions under which the number of pulses generated per half cycle are 40 or (-1). Here fe and f are thefrequencies of carrier and reference signals respectively. For a single-pulse modulation used in inverters, show that output voltage can be expressed as Vo = Σ 4V, na n = 1, 3, 5 na sin sin nd sin nwt 2 where 2d is the pulse width. (iii) A single-phase full bridge inverter has rms value of the fundamental component of output voltage, with single-pulse modulation, equal to 110 V. Compute the pulse width required and the rms value of output voltage in case de source volt age is 220 V.

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QUESTION TWO
(i)
(ii)
Explain sinusoidal-pulse modulation as used in PWM inverters. Discuss the
fc
conditions under which the number of pulses generated per half cycle are or
2f
(-1) Here fe and f are the frequencies of carrier and reference signals
respectively.
.
For a single-pulse modulation used in inverters, show that output voltage can be
expressed as
vo = Σ
Σ sin sin nd sin nwt
n = 1, 3, 5
4V, nπ
2
na
where 2d is the pulse width.
(iii)
A single-phase full bridge inverter has rms value of the fundamental component of
output voltage, with single-pulse modulation, equal to 110 V. Compute the pulse
width required and the rms value of output voltage in case de source volt age is 220 V.
Transcribed Image Text:QUESTION TWO (i) (ii) Explain sinusoidal-pulse modulation as used in PWM inverters. Discuss the fc conditions under which the number of pulses generated per half cycle are or 2f (-1) Here fe and f are the frequencies of carrier and reference signals respectively. . For a single-pulse modulation used in inverters, show that output voltage can be expressed as vo = Σ Σ sin sin nd sin nwt n = 1, 3, 5 4V, nπ 2 na where 2d is the pulse width. (iii) A single-phase full bridge inverter has rms value of the fundamental component of output voltage, with single-pulse modulation, equal to 110 V. Compute the pulse width required and the rms value of output voltage in case de source volt age is 220 V.
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