How does a capacitor energy storage spot welding machine work?

A capacitor energy storage spot welding machine operates by charging capacitors with rectified AC power from the mains. The stored energy is discharged through a welding transformer, converting it into low voltage, resulting in concentrated energy pulses and stable pulse current. Resistance heating occurs at the contact points of the welded workpieces, effectively welding the metals together.

Due to the stable welding voltage and short welding time of capacitor energy storage spot welding machines, they are better suited for welding materials with good thermal and electrical conductivity or small post-weld heat-affected zones. All welding machines feature touch screens for digital operation, making them easy to understand. The machine’s performance can be extended through personalized energy programming and can be designed with various fixtures to meet specific welding requirements, thereby enhancing productivity.

The characteristics of capacitor energy storage spot welding machines include the use of capacitor energy storage welding methods, which provide more accurate output currents with minimal impact on the power grid, resulting in energy savings. They employ fast charge and discharge capacitors imported from world-renowned factories, ensuring stable capacity and long service life.

Special charging circuits and control system designs enable faster and more stable charging. Welded joints exhibit minimal oxidation and deformation, eliminating the need for polishing processes. The welding time is extremely short, typically ranging from 0.003 to 0.006 seconds, and cannot be adjusted. The output and input are completely separate, unaffected by external power source variations, thereby maintaining constant power output.

Capacitor energy storage spot welding machines are widely used in various industrial applications for multi-spot welding and welding of metals with good electrical and thermal conductivity. These machines store energy in capacitors and release it instantaneously, concentrating large currents during small-area spot welding to achieve welding effects. Consequently, overheating and deformation of workpieces due to heat generated during the welding process are minimized.

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