Mosa Magic Weld

Electrical components of the machine:

• Permanent magnet alternator: the alternator has 2 galvanically separated windings, one for welding and the other for the auxiliary output.
• Auto idle solenoid: an electromagnet inside the aluminium casting is supplied at no load only and forces the engine speed at minimum (2000 rpm). When the load is present, welding or auxiliary output, the electromagnet is not supplied any more and the engine speed goes to the maximum (4000 rpm rated open circuit).
• High frequency chopper diode bridge: it regulates the welding current using the “Chopper Technology”, which chops the welding D.C. current at high frequency.
• Hall sensor: it measures with high precision the welding current and it’s completely isolated from the welding circuit.
• Reactance for cellulose electrodes (optional).
• PWM control board: this single board controls the welding process, the auxiliary current and the electromagnet for the engine accelerator. Three integrated circuits PWM type (Pulse Width Modulation) have been used. The use of these PWM’s not only for the welding control but also for the supply control of the electromagnet reduces to the minimum the wasted power on the electromagnet.
• D.C. chopped auxiliary output: the auxiliary output is chopped every 50 msec. in order to prevent i damages to switches of hand tools due to arcing. This special D.C. auxiliary is suitable not only for universal hand tools with brushes, but also for those with electronic speed control. In this case the limit is that these tools can run at the maximum speed only, without possibility of speed regulation.