22 Operation principle and hardware description
The main circuit of the drive module is shown below.
This table describes the operation of the main circuit in short.
Component Description
Rectifier Converts the three-phase AC voltage to DC voltage.
Capacitor bank Energy storage which stabilizes the intermediate circuit DC voltage.
Inverter Converts the DC voltage to AC voltage and vice versa. The motor operation is
controlled by switching the IGBTs.
Motor output
AC supply
Capacitor bank
Rectifier
R- UDC+ UDC-
R+
U1
V1
W1
U2
V2
W2
Inverter
ACQ810-04
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