HBS Visar 650 - Internal Assemblies and Type Plate

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8 Components of the Stud Welding Unit
8.1 Main Assemblies
Mains input
Welding output
1 - PFC mains input 4 - Medium frequency transformer
2 - Electrolytic capacitors 5 - Rectier
3 - IGBT switch 6 - Control unit
The mains voltage is rectied by the master switch and the EMV lter in the PFC
unit (1).
The rectied voltage is smoothed by the electrolytic capacitors (2) and led to the
IGBT switches (3). These switches turn the direct voltage into a high-frequency
alternating voltage of 30 kHz.
The energy is transferred via the medium frequency transformer (4) with di-
odes (5) and rectied. The smoothed current is led to the weld bushes.
The IGBT switch (3) is controlled in the control unit (6). The control unit also coor-
dinates the mechanical process (withdrawing of the welding elements) with the elec-
tronic control system (triggering the pre current, triggering the main current, welding
time process). The welding time and welding current are fully adjustable.
The type plate is located on the backside of the stud welding unit.