When welding general capacitors

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.

Can super capacitors be used for general resistance welding?

As Gould (Ref. 10) noted, the potential use of super capacitors for general resistance welding applications will only increase the extent to which CD welding is reviewed and considered in the years ahead. Content may be subject to copyright. ...

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.

What is capacitive discharge or CD welding?

Capacitive discharge or CD welding is a variant of resistance welding(1,2). The process differs from the conventional variants largely in the type of power supply used. Conventional systems provide some variant of alternating current to a transformer arrangement.

How does a high power capacitor work?

As shown in Fig. 1b, the high-power capacitor discharges when the stud tip is perpendicular to the plate, and the stud tip quickly melts, forming an arc with a small size between the stud tip and the plate. After sufficient melting, the stud is inserted into the molten pool to form a CDASW joint .

Do electrolytic capacitors yield identical weld performance results?

The results presented here indicate that electrolytic capacitors, configured to provide similar charge voltage and energy storage, can yield identical weld performance results. Process, mechanical strength, and metallographic results are all identical for the two capacitor arrangements.