Research on temperature uniformity of SiC heating by multi microwave source combination based on topology reconstruction

In response to the problem of uneven temperature distribution caused by the formation of cold and hot spots during microwave heating, this paper proposes a variable power heating strategy for multi microwave source groups under topology reconstruction. Firstly, based on algebraic graph theory, a communication topology structure between microwave source agents is constructed, and a control framework for multi-agent systems under topology reconstruction is designed. Secondly, based on this framework, an event-triggered topology reconstruction algorithm is introduced to achieve consistency transformation of the microwave source communication topology structure, and to reconstruct the connection methods between different groups and coordinate the adjustment of the input power values. Finally, a numerical calculation model combining integer and continuous variables was established using the finite element method, and validated by heating SiC medium and a general heating model. Compared with the traditional universal heating model, the temperature uniformity index of the proposed strategy is improved by 12.2% -33.0% in the horizontal direction and 30.0% -53.9% in the vertical direction, proving that the proposed method can effectively improve the uniformity of temperature distribution.