4046 induction heating controller

This project is used to verify the solution verification board design of the PLL phase-locked loop chip HEF4046 of Lichuang Mall. This verification board is mainly used for resonance controllers to implement induction heating applications such as high-frequency quenching or induction cookers. This control circuit can perform real-time frequency tracking of the inverter, make reasonable phase compensation based on the feedback signal, ensure that the inverter works in a weakly inductive state, and achieve a switching zero voltage function while obtaining a higher input power factor, achieving High efficiency heating.

characteristic:

• Phase detector 1 or 2 can be switched with a jumper cap.
• On-board voltage comparator provides phase compensation function.
• Output synchronous drive signal and inverted synchronous drive signal (without dead time), which can directly drive the full bridge (with dead time).
• There is a current transformer load resistor, which can be directly connected to an AC voltage transformer as a current signal input.
• Leads to various interfaces that can be used for numerical control or external feedback.

Note: The resistance and capacitance values ​​in the schematic diagram are not completely accurate and will be modified after the author's actual measurement! The next step will be PCB board proofing, and then we will update photos of empty PCB boards, photos of finished welding products, demonstrations, tutorials, etc.