Development of ARM Microcontroller-based Quasi-Resonant inverter Induction Heater

This paper presents the results of developing an ARM Microcontroller-based Quasi-Resonant Induction Heater. The induction heater consists of three modules: power circuit, temperature control, and data acquisition system. Power circuit module is used to generate a high frequency electromagnetic field and current to generate heat at the workpiece. Temperature control module is used to control the temperature of the workpiece. It is done by variating the frequency of the switching signal delivered to MOSFET. Data acquisition system module is used to acquire the actual temperature of the workpiece as feedback for the temperature control module and measure the DC current to calculate the power used by the system. The result of the test is the overall induction heater system works well. It can be used to join metals through brazing method at a controlled temperature. The actual temperature of the workpiece and the system performance can be monitored through the GUI.