8. working elements
Diagram for the EWELDM253 working elements.Digram9
Input AC220V,rectifier and filter it into 620VDC.
Control the IGBT by PWM+PFM,inverter the 620VDC to 20KHZ AC.
High frequency transformer pass the power by insulation and voltage reducing with high
efficiency.
Output the second rectifier and the second filter.Output the required welding current and voltage.
9.Maintenance
Check the safety measure be efficiency.
Get rid of the dust for the power source (For example,dry compressed air)
Before operating,,Check the "workpiece" "torch"connectors of the power panel if they are relaxed
.Check the connection between the grounding cable and plug if they are relaxed,(If relaxed,the
serious heating will damage the quick connectors)
.Check the fan if it works regularly.charge it if it is trouble.
Check the insulation and breakage of the input power cord
.Change it in time to ensure the safety.
check if there is any noisy for the wire feed motor.
Check the abrasion of the wire feed hose.Get rid of the dust inside of the hose.(1~2times /40kg
wire)
.Get rid of the splash inside the nib regularly to ensure the guaranteed result by the gas blow.
Check the abrasion of the nib.Change it in time.(suggest 5~10pieces nibs/40kg wire).
13
+
IGBT
rectifier
filter
input
inverter
circuit
rectifier
filter
output
control circuit
working piece
welding gun
wire
panel indictor
feeder
Digram 9
input
