Sedecal SHF-310 - Page 167

LV-DRAC Module Block Diagram
OPTO
OUTPUT
COMMANDS
D
A
3PH -- IGBT INVERTERS
MAIN / AUX
TRANSFORMERS
Acceleration /
Running Voltage
(C) COMM
(A) AUX
(M) MAIN
I MAIN
I AUX
CURRENT
LIMIT
LOGIC
CONTROL
SYSTEM
CONFIGURATION
SWITCHES
OUTPUT
μ C
PTR1
U2
U3
U11 A -- DU16
U17
OP1--OP2
RL2
SW1toSW4
I COMMON
DC Brake
Contactors
INTERFACE
CONTROL
DRAC PCB
ERROR
DRAC
LV-DRAC MODULE
CONTROL DRAC PCB
CONTROL
Filter
F4
F3
INPUT
RECTIFIER
PCB
HV INVERTER
MODULE
DC BUS
READY
U15
Ferrites
Open
Collector
Driver
MAINS
COUPLERS
U4B, C & D
M
C
A
U12A,B&U1B
U1C, D & A
DL2
AC / DC CONVERTERS
Main / Aux
Common
Stator
Tube 2
(ADC)
Acc Run
Tube Selection
Ribbon Cable
J3
J1
OC
DRIVER
Power
Supply
240 VAC SW
LV DC
Power
Supply
Serial Link
Control
Drac
Com
Main / Aux
Common
Stator
Tube 1