MATHEMATICAL MODELING AND EXPERIMENTAL STUDIES OF A FREQUENCY CONVERTER FOR INDUCTION HEATING SYSTEMS

Abstract

The article discusses the development and application of induction heating systems in various industries, including agricultural machinery manufacturing, the automotive industry, and metal processing. A comparative analysis of induction installations and conventional heating methods is presented, highlighting their advantages such as high heating rates and efficiency, improved process control, and reduced energy consumption. The mathematical model of the frequency converter for induction heating systems is based on a system of discrete equations describing the dynamics of multidimensional variables. Unlike existing approaches, the proposed model takes into account the optimal operating frequency range, reduces the number of power transistors, and considers the installed power, thereby maintaining high energy efficiency. Within the scope of the study, a prototype frequency converter operating in the 2-20 kHz range with single-phase and three-phase power supply, as well as a 6 kW inductor, were designed and manufactured. Experimental studies confirmed the adequacy of the proposed model and its applicability under real technological conditions. The practical significance of the work lies in the possibility of using the developed model and prototype to select optimal induction heating technologies for mechanical engineering and agricultural machinery, ensuring increased reliability, reduced energy consumption, and lower operational costs. The results demonstrated the sufficiency of the proposed model and confirmed its practical applicability. onic components, which may affect both the converter operation and the power supply network. It was shown that variations in converter parameters have a significant impact on the selection of optimal induction heating modes, which is of practical importance for both educational purposes and industrial implementation.