High Frequency Welding Machine used for Tube Mill

High-frequency inverters are available in two types: series resonant and parallel resonant. However, pure parallel resonant inverters face challenges in high-frequency power applications, such as the inability to eliminate lead inductance effects, which limits their use in large-capacity high-frequency power systems. The series resonant inverter, also known as a voltage resonant inverter, operates under high-voltage conditions within the cabinet. This results in a loose internal layout, increased energy radiation, and potential high-voltage arcing or safety hazards. The third-generation all-solid-state welded tube power supply employs fast-recovery diodes IRFP460 and DSEI60-06A as main power components. Its circuit topology adopts a current-source-fed series-parallel configuration, combining the advantages of both series and parallel circuits while avoiding their drawbacks. Additionally, a specialized circuit topology eliminates switching losses in power electronic devices at high frequencies, thereby enhancing both efficiency and overall system reliability.