The water-cooled phase-shifting transformer is a special transformer that combines phase-shifting technology and water-cooling heat dissipation. It is mainly used in high-power rectifier systems (such as high-voltage inverters, ship electric propulsion systems, etc.). Its core function is to achieve multi-pulse rectification through phase difference phase shifting, thereby effectively reducing harmonic content and improving power quality. At the same time, the water cooling system solves the heat dissipation problem during large-capacity operation.