Main Assemblies - HBS Visar 650 Operating Manual

8.1

Main Assemblies

1 - PFC mains input
2 - Electrolytic capacitors
3 - IGBT switch
The mains voltage is rectified by the master switch and the EMV filter in the PFC
unit (1).
The rectified 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 rectified. 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.
©HBS Bolzenschweiss-Systeme GmbH & Co. KG
All rights reserved – Reprinting, in whole or in part, only with the approval of the manufacturer
8 Components of the Stud Welding Unit
4 - Medium frequency transformer
5 - Rectifier
6 - Control unit
19