Mid-Frequency Welders

Weld Systems Integrators is the choice for Mid-Frequency Direct Current (MFDC) welding equipment and integration. Our staff has the MFDC expertise you’re looking for to maximize the benefits of this rapidly-growing resistance welding technology.

Mid-Frequency Benefits:

Significant Energy Savings. For plants with limited electrical power, the MFDC approach may allow you to accomplish more projects, efficiently utilizing your available energy.

Automatic Load Distribution. The MFDC welding machine load is evenly distributed across all three phases. This allows equal load to be drawn from each line, thus reducing peak draw on any one line.

Improved and Consistent Power Factor. The MFDC welder load appears to have unity power factor, which reduces the overall plant load and avoids possible penalties assessed by power companies.

Attains Welding Current Immediately. Standard DC welding utilizes SCRs that have a rise time prior to steady state. With MFDC welding, rise time is immediate. It is possible to create full-phase firing during the natural rise time to lessen the rise time.

Precise Weld Current Control. MFDC welding utilizes IGBTs for current switching. These units are turned on and off at a rate of 400-2000 times per second. By controlling this rate, the MFDC can very accurately determine the current. Weld time utilizing the MFDC control is in microseconds—not hertz—ensuring a significantly more precisely-governed welding current.

Variable Application Oriented. The MFDC control can adapt to virtually any welding application. Please consult our application engineers for your specific solution.

MFDC controls and transformers are available in nearly every welding format. Equipment range includes spot welders, trans-guns, projection welders, and seam welders. MFDC equipment can also be retrofitted into your existing system.

Contact WSI today to learn more about Mid-Frequency welding!