Intermediate frequency inverter resistance spot welding power supply system

The utility model discloses an intermediate frequency inverter resistance spot welding power supply system, which comprises a main circuit and a control system, wherein the main circuit comprises a power switch, an input rectifying and filtering circuit, a power inversion circuit, an intermediate-frequency transformer and an output rectifying and filtering circuit which are connected in turn; the control system comprises a control transformer and a control circuit; the control transformer and the input rectifying and filtering circuit are respectively connected with a power frequency alternating current power grid through the power switch; the output rectifying and filtering circuit is connected with a load; the control circuit is connected with the power inversion circuit, a keyboard and display equipment respectively; and the control circuit is also connected with an output end of the power inversion circuit. The intermediate frequency inverter resistance spot welding power supply system is simple, feasible and efficient and has high control accuracy and high response speed; and due to three-stage heating, the system has output functions of constant current, constant voltage, constant power, fixed pulse width and the like, fifteen welding parameters are adjustable, and twenty groups of welding parameters are stored.