Lincoln Electric V205-T Benutzerhandbuch
Section E-1
Section E-1
V205-T AC/DC
Theory of Operation
.............................................................................................................Section E
TABLE OF CONTENTS
-THEORY OF OPERATION SECTION-
Superimposition
board
board
Bus board
Fan
Input
board
board
HF
board
board
Main IGBT
& Power board
& Power board
4
IGBT’s
IGBT’s
Control board
Display & LED
board
board
888
Control
Knob
Knob
Gas
Solenoid
Solenoid
DC blocking
capacitor board
capacitor board
Main
Transformer
Transformer
Output
board
board
Output
Transistor
Module
Transistor
Module
Current
Hall
Device
Hall
Device
Output
Filter bd.
(bypass)
Filter bd.
(bypass)
(D + E)
Remote 2/4
Remote 2/4
Remote
75, 76, 77
A, B, C
75, 76, 77
A, B, C
24 VDC Remote 2/4 path (D + E)
turn on
AC ckt.
+15, -15, +5
input volt meter
thermostat info
set info
input current meter
turn on PWM
HF control signal
+48, +24
Input
Choke
Choke
_
+
RF coil
-48, +24,+15,-15,+5
reconnect info.
voltage feedback
high volt supply
turn on
AC ckt.
current feedback
IGBT
Thermostats
Thermostats
Output
Diode
Thermostat
Diode
Thermostat
Voltage Feedback
Current Feedback
AC DC Gate drive signals
24 VDC
48 VDC
Output
Choke
Choke
FIGURE E.1 – V205-T BLOCK LOGIC DIAGRAM