Kikusui PCZ1000A, Руководство по эксплуатации

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PCZ1000A
A-3
Appx.
Fig.A-2 Differences in Operation
Crest factor function
The PCZ1000A varies the crest
factor (CF = peak/rms; see the
definition below) by changing the
angular width (using the 90
°
and
270
°
peak values) of the current
waveform. In this case, the current
waveform is similar to a capacitor-
input fullwave rectified waveform.
(In a strict sense, however, it contains
different harmonic components.)
• Definition of basic alternating current terms
・
Root-mean-square value, X (rms)
Square root of the average of the sum of a given squared number of the square
of the instantaneous value (value X (t) at time "t") on the alternating-current
waveform (voltage or current)
・
Apparent power, VA
Product of the root-mean-square value of the voltage, Vrms, and current, Irms
VA
＝
Vrms × Irms
・
(Active) power, P (W)
Mean value of the product (instantaneous power p (t)) of the instantaneous
value of the voltage (v) and that of the current (i)
・
Crest factor (CF)
Ratio of the peak (crest) value of the voltage or current to its RMS value
CF
＝
Xpeak/Xrms
Voltage waveform
Cuurent waveform
Voltage waveform
Current waveform
Operation of a true constant current
Operation of PCZ1000A
Voltage waveform
Peak value
of the current
Current waveform
Angular width
of the current
Fig.A-3 Crest factor function
X
1
T
0
T
[X(t)]
2
d t
Where T is one cycle of alternating
current
P =
1
T
0
T
p ( t ) d t