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Principle of an Inverter
Infeed
(Rectifier)
DC
link
Power module
(Inverter)
Three-phase mains system
such as 3 AC, 400V, 50 Hz
Induction
motor
Inverter
Variable
speed
Voltage
U
Voltage
U
Voltage
U
t t t
SITRAIN
TIA-PRO1 / Introduction TIA Portal Page 34 Siemens AG © 2011