Hardware Principles; Basic Principles - INVT Goodrive880 Series Hardware Manual

Goodrive880 Series Water-Cooled Drive Hardware Manual

2.7 Hardware principles

2.7.1 Basic principles

Water-cooled inverter unit
The inverter unit converts DC voltage into AC frequency-variable voltage and supports driving asynchronous
and synchronous motors. The voltage class is 690V.
The water-cooled inverter unit consists of DC precharge, bus capacitor, IGBT, and other components. Figure
2-8 shows the simplified main circuit.
DC+
DC-
No.
1
2
3
Rectifier unit
The rectifier unit converts three-phase AC voltage to DC voltage and provides power for the subsequent
inverter module to drive the motor. One or more inverter modules can be installed.
The A8LC rectifier unit mainly consists of RC filter board and rectifier bridge. Figure 2-9 shows the simplified
main circuit.
R
S
T
No.
1
2
202212 (V1.0)
Figure 2-8 Main circuit diagram of the water-cooled inverter unit
K1
R
2
1
Name
DC precharge Optional accessory to buffer the bus capacitor charge.
To make the voltage stable by filtering out the AC part from the
Bus capacitor
bus voltage.
Inverter module To convert DC current to AC current.
Figure 2-9 Main circuit diagram of the rectifier unit
1
Name
RC filter board To absorb the surge current.
Rectifier bridge To convert AC current to DC current.
3
Description
2
Description
Product overview
U
V
W
PE
DC+
DC-
11