What is the merit of using a capacitor type?

In the case of the capacitor type, the energy charged in the capacitor is discharged in a short time, which has the following advantages:
1. The equipment capacity is small, and it is about 1/10 of the size of a regular single-phase AC type.
2. Welding current is not affected even if the primary voltage fluctuates.
3. Since there is less thermal conduction from the welded part to the surroundings, burning and distortion are unlikely to occur.
4. Stable weld strength can be obtained with projection welding, such as for nuts on hot stamping materials.
5. Energy consumption is about 1/3 of that of a single-phase AC type, enabling energy saving.(Weld testing by Dengensha)