A TRANSISTOR CONVERTER WITH LOAD IMPEDANCE MATCHING OF INDUCTION HEATING EQUIPMENT WITH TWO/THREE FREQUENCY OUTPUT CURRENT

This paper presents a schematic solution of a transistor converter for induction heating equipment featuring two/three-frequency output current. The proposed solution enables discrete adjustment of the input voltage of the inverter within the converter, facilitating alignment with the load impedance of the induction heating equipment through the sequential modulation of currents at different frequencies. Detailed descriptions of the operational modes of the DC/DC converter are provided, highlighting its unique characteristic of operating semiconductor elements in an almost static mode with minimal dynamic losses. This innovative approach not only enhances energy efficiency but also elevates electromagnetic compatibility in converters designed for induction heating equipment with two/three-frequency output currents. References 10, figures 4.