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Block diagram of a medium- -frequency welding system
PSS .....
Current control
by timer
1070 078 224--- 108
PSU 5000 / PSG 3000
Instructions for Assembly and Operation
` Medium--frequency welding with current control improves the quality of the spot
weld.
The welding system with constant--current control (KSR) compensates the
changes in sheet resistance within the weld time and helps to obtain a constant
welding result.
The Bosch PSU / PSG MF welding system is equipped with an integrated cur-
rent control.
PSU 5XXX
Current control
by inverter
` Enhanced application range for micro--welds.
The inverter has a DIP switch bank for setting low welding current ranges. It is
driven by a weld timer in millisecond intervals.
PSG 3XXX
3~
Current feedback from
transformer- -rectifier unit
Advantages
Benefits
+
--
1--3
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