3-Phase Direct-Current Technique

Before inverter technology has been made available for reasonable prices, units of this design offered the best compromise as far as prices and achievable current quality have been concerned.

This applies, however, only to perfect unit design as the transformers must be adapted with utmost precision to the welding task. The intended low residual ripple is only generated if the control is operated almost full scale.

Compared with simple alternating-current systems, this means:

3-phase balanced system load
relatively low residual ripple of the welding current with 300 Hz
smallest controllable unit of time 1/6 period (3,33 ms at 50 Hz)
uninterrupted energy input into the weld nugget
low inductive losses through rectified welding current, therefore transformer size is independent of the welding window

Nevertheless:

task-specific design of the transformers

Our products: Since the relatively inflexible design of 3 phase DC machines does no longer meet increased demands, we do not offer those types of welding systems.

Alternative solutions:
As an alternative, however, the entire product range of SPATZ and AutoSPATZ inverter power sources is available.

MFDC		HFDC
Inverter	Welding Current	Inverter	Welding Current
SPATZM300 SPATZM300plus	up to 18 kA	SPATZH300 SPATZH300plus	up to 9 kA
AutoSPATZM600L	up to 30 kA	SPATZH6000 SPATZH6000plus	up to 9 kA
AutoSPATZM1600	up to 65 kA
AutoSPATZM2400	up to 100 kA
SilverSPATZM600LL SilverSPATZM600LW	up to 30 kA
SilverSPATZM800LL SilverSPATZM800LW	up to 30 kA