The prestressed steel bar needs to be stabilized during the production process, that is, the wire is heat treated in-line under a certain tension condition to eliminate the residual internal stress of the steel bar to meet the technical requirements of low relaxation performance of the steel bar, and the heat treatment is through the intermediate frequency. Induction heating furnace to achieve. The working principle of the intermediate frequency induction heating furnace: the three-phase AC power supply is rectified by the full control bridge to obtain the DC power supply, and then the DC power is converted into the intermediate frequency alternating current on the load by the inverter, and the load circuit is composed of the compensation capacitor and the induction coil in parallel to form a resonance circuit. It works in near-resonant state to achieve higher power factor and efficiency. When an intermediate frequency alternating current flows through the induction coil, an electromagnetic eddy current is generated inside to heat the reinforcing bar.

Jiangyin Falsheng Steel Products Co., Ltd. currently has 5 ATE medium frequency induction heating furnaces. The rated parameters are shown in Table 1. The operating parameters are shown in Table 2.