Vacon NX - Page 22

4
vacon • 20 Technical data
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Figure 1. VACON
®
NX Liquid-Cooled AC drive principal block diagram
=
=
L1
L2
L3
PE
U/T1
V/T2
W/T3
3~
3~
RS 232
3065_uk
Mains
Motor
Measure-
ments
Gate
Drivers
Motor
Control
ASIC
Motor and
Application
Control
Control
Keypad
Current
Sensors
Rectifier
(frequency
converters only)
IGBT
Inverter
Power
Supply
Control
I/O
Control
I/O
Control
I/O
Control
I/O
Control
I/O
1)
2)
3)
External
choke
*Brake resistor is available for all sizes (CH3 to CH7). An internal brake chopper belongs to standard
equipment in sizes CH3. For CH72 (only 6-pulse) and CH74, it is available as internal option while in
all other sizes it is optional but installed externally.
Control
module
Power
module
Charg.res.
Brake
Chopper*
Brake resistor*