Tweco 300 DC Arcmaster - Manual (Page 20)

ARCMASTER 300 ACDC
2-4 February 22, 2006
2.06 Functional Block Diagrams
Figure 2-2 illustrates the functional block diagram of the 300 ACDC-power supply.
Art # A-04981
Main
Circuit
Switch
Filter
Input
Diode
Primary
Capacitor
DC Power
Voltage
Sensor
IGBT
Inverter
Thermal
Detector
To each control circuit
+/-15VDC +18VDC
+24VDC +5VDC
Trouble
Sensing
Circuit
Drive
Circuit
Torch Control
Connection
(CON1)
circuit
Current
Adjustment
Reference
Adjustment &
Mode select Switches
Panel Circuit Board
Sequence
Control
Th ermal
Sensor
Circuit
Main
Transformer
(PCB14)
Output
Diodes
HF-UNIT
Control
Circuit
Stick Mode
VRD
Sensing
Circuit
Lift Tig Mode
Output Short
Sensing
Circuit
Coupling
High
Coil
Frequency
Unit
Fan Control
Circuit
Gas Control
Circuit
Fan
Solenoid
Hall Current
Transformer
(HCT1)
Output
Inductor
Thermal
Detector
Input
Power
Drive
DC Power
Circuit
To each control circuit
+/-12VDC +15VDC
Secondary
IGBT
Inverter
Primary
Current
Sensor
Figure 2-2: 300 ACDC Model Functional Block Diagram
2.07 Transporting Methods
These units are equipped with a handle for carrying
purposes.
WARNING
ELECTRIC SHOCK can kill. DO NOT TOUCH
live electrical parts. Disconnect input power
conductors from de-energized supply line
before moving the welding power source.
WARNING
FALLING EQUIPMENT can cause serious
personal injury and equipment damage.
• Lift unit with handle on top of case.
• Use handcart or similar device of adequate capacity.
• If using a fork lift vehicle, place and secure unit on a
proper skid before transporting.