CDM 3201 Order No. BA 92-12-3321A Issue 19.09.08 21
4 Function
In this chapter you learn more about the design of the power unit and how to use the
various setting options.
4.1 Components of the Power Unit
The power unit consists of the following main assemblies
- Charging unit (1) - Control (2)
- Welding capacitors (3) - Welding thyristor (4)
Mains alternating current is converted into direct current in the rectifier (1). Welding
capacitors (3) are charged to the adjusted voltage. The capacitors store the energy
which is required for the welding process. The total energy is set by the user via the
charging voltage.
The electronic switch (4) releases the charging voltage in the right time.
The charging process as well as the welding process are controlled by the control
unit (2).
The negative pole of the capacitor is connected to the welding gun.
The positive pole is mostly connected to the work piece via the vice grips.
4 Function
4.1 Components of the Power Unit
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