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SumoSPATZ Capacitor Bank and DragSPATZ Inverter Power Source


For this combination, the DragSPATZ high-current inverter and the SumoSPATZ capacitor bank are connected together. Both systems can demonstrate their strong points this way and the restrictions of the separate systems are eliminated.

The energy which is necessary for welding is provided by the SumoSPATZ storage capacitors. This allows the accordingly smaller design of the otherwise necessary, bulky power supply. Depending on the application, a 16 A or 32 A power supply for welding currents of up to 65 kA is quite enough.

An agreeable side effect here is the almost ideal smooth welding current, as the residual ripple which is otherwise existing in the intermediate circuit is smoothed almost completely.

The downstream DragSPATZ inverter allows, moreover, the realisation of any current with ramps, plateaus, off-times, etc. This would have been impossible if a "pure" capacitor discharge system had been applied.

The switch cabinet of SumoSPATZ houses the storage capacitors with the appropriate charging circuit. The following elements are installed in the door of SumoSPATZ: main switch, "Ready" display, key "Charge ON/OFF" and the display of the current state of charge of the capacitor.

The cabinet dimensions of SumoSPATZ are (W x H x D) 800 x 1.200 x 400 mm / 31.5 x 47.2 x 15.7 in (incl. a 200 mm / 7.9 in base). Cable entries are carried out via high-strength cable glands. The installation of the DragSPATZ inverter can be carried out on the capacitor bank, as shown in the picture.

Technical Data  
Type SumoSPATZKB1080
Max. welding energy 40.000 Ws
corresponds with approx. 65 kA at 50 ms
Mains connection 3~400 V - 16 A at a 4 s welding cycle
3~400 V - 32 A at a 2 s welding cycle
Dimensions (W x H x D) 800 x 1.200 x 400 mm
incl. 200 mm base
31.5 x 47.2 x 15.7 in
incl. 7.9 in base
Weight 320 kg / 705.5 lb