The Next-Generation Capacitor Discharge Welding Power Supply ESW 200

Precision Welding with Stored Energy Technology
Our capacitor discharge welders (CD welders) leverage advanced electronic voltage elevation and constant-current charging circuit technology to store electrical energy in capacitors. This stored energy is discharged instantaneously to the workpiece via a pressure mechanism, melting the contact metal with welding currents ranging from tens to hundreds of thousands of amperes in an incredibly short time. The result is minimal heat loss and perfect welds, making it ideal for high-precision applications.

The stored energy welding power supply – commonly called a Capacitive Discharge Welder or CD Welder – extracts energy from the power line over a period of time and stores it in welding capacitors. Thus, the effective weld energy is independent of line voltage fluctuations. This stored energy is rapidly discharged through a pulse transformer producing a flow of electrical current through the welding head and workpieces.

Instant High-Energy Output for Superior and Consistent Weld Quality

The essence of CD welding lies in the rapid release of stored energy. Our power supply supports a wide adjustable energy range from 0.1 kJ to 10 kJ, with energy accuracy up to 1%. A full closed-loop control mechanism guarantees that every weld receives identical energy.

• Highly accurate energy control based on direct kJ settings
• Minimal heat-affected zone due to V²-based rapid energy conversion
• Ideal for micro-scale welds on copper, nickel, stainless steel, titanium, and other metals
• Strong weld strength with excellent repeatability

By removing dependency on waveform-based resistance welding, CD welding ensures unmatched stability and uniformity — critical for industries requiring micron-level precision.

Capacitive discharge power supplies are rated in accordance with the amount of energy they store and the welding speed. The energy stored, expressed in watt-seconds (joules), is the product of one-half the capacitance of the capacitor bank and the square of the applied voltage. The energy delivered to the electrodes is considerably less than this value because of losses in the primary and secondary circuits.

Product Parameters