vimwiki/tech/AC.wiki

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2022-01-26 16:45:01 +00:00
= AC =
Ac or alternating current is type of power delivery via electricty in which
the voltage is oscilated, usually using some form of sin wave.
== Power delivery ==
Power delivery is difficult to calculate for AC in comparison to DC. For DC,
the power delivery is calculated via
`P = E^2 / R`
For AC, however, we substitute E with the root mean square (RMS)
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=== RMS ===
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The RMS can be any value for different waves, however for the most common type
of wave, the sin wave, we can simply *multiply the peak voltage by 0.707*.
For example
Sin wave with a peak voltage of 17V has an RMS of 0.717 * 17 = 12V
To convert from the Power delivery of an AC line back to the peak power, simply
multiply the value by 1.414. For example
A 120V AC power line has a peak voltage of 120 * 1.414 = 169.7V