TPT July 2020

T E CHNOLOG Y

Solid-state tube welder from EFD Induction EFD Induction’s new Compact Weldac is aimed at those in the market for a new, efficient and easy to use solid-state tube welder. immune to coil short-circuits, caused, for example, by metal slivers getting caught between the coil and the tube. While this can destroy a MOSFET transistor, SiC transistors are not affected.

“Tube and pipe manufacturers who are in the market to replace their vacuum- tube welders with solid-state systems have even more reasons to do so now,” said global sales director of Tube & Pipe at EFD Induction, Peter Runeborg. “With its low investment cost, ease-of- use and remarkable uptime, the new Compact Weldac with SiC technology is well worth considering.” Some of the benefits are: high efficiency, weld quality, reliability, easy operation, less power consumption and more production uptime combined with lower running costs and a reduced footprint – it is no wonder we call the new Compact Weldac a small revolution. Fewer and more efficient Silicon Carbide (SiC) transistors in the new high-frequency inverter power modules makes the entire system of the Compact Weldac efficient.

“In fact, EFD Induction inverter technology is so advanced that it is possible to set the sensitivity for the Weldac to shut down when a short circuit occurs.” The Compact Weldac reiterates EFD Induction’s long-standing focus on safe and simple operation. “We have this obsession about making our machinery simple to handle and control,” said Mr Runeborg. “A high-output, industrial power-electronics system like the Compact Weldac is easy to operate, with a minimum of manual settings and other operator interferences. Coil changes are done in mere seconds, and the welder adjusts automatically to each tube dimension.”

“SiC transistors have been around for some years, but it is only lately we have found ones that have the required quality to meet the high standards of EFD Induction and our demands for required uptime in an application such as tube and pipe welding”, said Mr Runeborg. “These, however, will significantly boost tube-welding output. The new SiC transistors will run at frequencies up to 500kHz depending on tube size and customer requirements. A major advantage is that they are virtually

EFD Induction www.efd-induction.com

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