AC Pulse Welding Waveform with Short-Circuit Droplet Transfer

The patent applies periodic action by implementing a cyclic current waveform that alternates between positive and negative polarity peak currents with base currents in between. This periodic variation in current polarity and magnitude enables controlled droplet transfer during each half-cycle while maintaining overall arc stability through the repeating pattern, directly resolving the contradiction between achieving good welding penetration and maintaining arc stability.

The patent employs dynamics by making the current parameters dynamic rather than static. The welding current continuously varies through four distinct phases (positive peak, base, negative peak, base) within each cycle, with polarity and magnitude changing dynamically. This dynamic current control adapts to the droplet formation and transfer process at different stages, improving both welding quality and arc stability simultaneously.

The patent applies segmentation by dividing the welding current into distinct segments or phases: positive peak current, base current, negative peak current, and base current. Each segment serves a specific function - the peak currents drive droplet formation and transfer, while the base currents provide transition periods. This segmentation allows high peak currents to be applied without continuous exposure, reducing droplet scattering while maintaining welding efficiency.

The patent uses periodic action by implementing alternating positive and negative peak currents separated by base currents. This periodic pattern allows droplets to be transferred during peak current phases while the base current phases provide recovery and transition periods that prevent excessive droplet scattering. The cyclic repetition of this pattern maintains welding efficiency while controlling harmful droplet dispersion.