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What is capacitor discharge welding?

Capacitive discharge welding, particularly for large-scale systems, is typically done using film-type capacitors. These capacitors store energy along alternating plates separated by a dielectric film. Charge is stored statically along the lengths of the plates. The basic configuration of the film capacitor is provided in Figure 1.

Does a film capacitor provide a similar voltage tolerance for CD welding?

Performance was evaluated based on current range behavior and metallographic response. Conclusions from this work include: to film capacitors – An array was developed to provide similar voltage tolerance and system capacitance to a standard film variant conventionally used for CD welding.

What are DC-link film capacitors?

Our DC-Link film capacitors, based on unique metallization technology with built-in safety functionality, withstand the high voltages and high currents experienced in xEV and industrial applications. Helping you easily finding the right film capacitor part number (s) for your design even when you are off-line.

Are electrolytic capacitors a viable alternative for large capacity CD welding systems?

Electrolytic capacitors (E-caps) offer a potential alternative for large capacity CD welding systems. E-caps incorporate an electrolyte impregnated into a separator. The separator is then sandwiched between anodic and cathodic foils. A dielectric is also used to prevent direct contact of the foils with the electrolyte.

Are electrolytic capacitors better than film capacitors?

Clearly, the use of electrolytic capacitors offers mass and volume advantages over film capacitors. For the application described here, a single 1280-μF film capacitor was replaced with an array of ten 3300-μF electrolytic units. A table providing the performance details of these two capacitor variants is provided in Table 2.

Are welds made with E-Cap metallographic data similar?

Similar results for the welds made using the E-cap array with the 213:1 turns-ratio are provided in Figure 15. Comparative metallographic data from welds made using the film capacitor(3) are provided in Figure 16. The micro-structural response from welds made with the two capacitor types is again nearly identical.

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What film capacitors are used in welding equipment?

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Capacitive discharge welding, particularly for large-scale systems, is typically done using film-type capacitors. These capacitors store energy along alternating plates separated by a dielectric …

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