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Spider Pig
What is a sinusoidal pulse width modulation? View All


13 years ago - 2 weeks left to answer. - 1 response - Report Abuse
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John Blawish
Sinusoidal pulse width modulation is a method of pulse width modulation used in inverters. An inverter produces an AC output voltage from a DC input by using switching circuits to simulate a sine wave by producing one or more square pulses of voltage per half cycle. If the widths of the pulses are adjusted as a means of regulating the output voltage, the output is said to be pulse width modulated.

With sinusoidal or sine weighted pulse width modulation, several pulses are produced per half cycle. The pulses near the edges of the half cycle are always narrower than the pulses near the center of the half cycle such that the pulse widths are proportional to the corresponding amplitude of a sine wave at that portion of the cycle. To change the effective output voltage, the widths of all pulses are increased or decreased while maintaining the sinusoidal proportionality.

With pulse width modulation, only the widths (on-time) of the pulses are modulated. The amplitudes (voltage) during


13 years ago

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