PPA5xx/15xx user manual
9-6
9.2 Individual phase computations
The power dissipated in a load subjected to a periodic
voltage, v(), with a current flowing a(), is given by:
2
w = 1/2
v().a() d
0
For a sampled signal, the formula becomes:
i = n-1
w = 1/n
v[i].a[i]
i = 0
Where n is the number of samples for an integral number
of complete cycles of the input waveform.
The rms value of a periodic waveform, v(), is given by:
2
rms = [ 1/2
v
2
() d ]
0
For a sampled signal, the formula becomes:
i = n-1
rms = [ 1/n
v
2
[i] ]
i = 0
Where n is the number of samples for an integral number
of complete cycles of the input waveform.
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