Chapter 2 – Operation Basics
ACA 635 IGBT Supply Sections
2-3
DC Current
A typical DC current (
i
dc
) waveform is shown below.
Harmonics
IGBT supply unit does not generate characteristic current/voltage
overtones the way a traditional 6- or 12-pulse bridge does, because of
the sinusoidal waveform of the line current. The typical spectrum of the
line current and line-to-line voltage harmonics is quite wide, but there
are no high individual components. The Total Harmonic Distortion
(THD) in voltage depends highly on the Short Circuit Ratio in the Point
of Common Coupling (PCC), refer to
.
0
50
100
150
200
250
300
350
400
450
500
100
102
104
106
108
110
112
114
116
118
i
dc
t
(ms)
(A)
Содержание ACS 600 MultiDrive
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