Patent ID: 8178816
Filing Date: 2012-05-15
Classification: B23K,H02J

Abstract:
1. A resistance welding device, comprising: a main converter; at least one auxiliary converter; and a power supply including the main converter and the at least one auxiliary converter, the main converter and the at least one auxiliary converter being connected with one another via an A.C. voltage intermediate circuit; wherein the at least one auxiliary converter includes a first auxiliary converter arranged as a drive converter for a first electrical drive and a second auxiliary converter arranged as a welding converter for a welding clamp, wherein the main converter and the first auxiliary converter arranged as a drive converter are adapted to convert an input voltage with respect to at least one of (a) phase or (b) frequency, the welding converter arranged as a load power control, wherein the load power control is arranged as a phase-angle control, wherein the at least one auxiliary converter includes third and fourth auxiliary converters arranged as drive converters for second and third electrical drives, and a welding clamp drive includes the third and fourth auxiliary converters and the second and third electrical drives, the third and fourth auxiliary converters arranged as drive converters using a common D.C. voltage intermediate circuit, and wherein the welding clamp drive includes only one tap on the A.C. voltage intermediate circuit for the third and fourth auxiliary converters arranged as drive converters.