Mysak T. Control of Matrix Converter using Sliding Modes

The object of research: The processes of frequency and voltage conversion using static semiconductor converters of matrix topology with a fully controlled bidirectional semiconductor switches. The purpose of research: The development of the theory of matrix converters by creating new control methods within the undetermined systems with sliding modes to improve the quality of the input and output electrical power of converters.. Methods of research: methods of the theory of variable structure systems; methods of the qualitative theory of dynamical systems; vector algebra; coordinate transformation methods; the method of space vectors; the theory of electrical circuits; methods of the theory of finite automata; mathematical modeling has been carried out in MATLAB environment; cross-emulator dSPACE, Code Composer Studio. Theoretical and practical results and innovations: Vector strategy of synthesis of matrix converter control structures in the class of systems with variable structure and sliding mode has been proposed for the first time. It uses a three-dimensional vector to generate the output voltage and input current space vectors of matrix converter for generalized loads. The simplex method implemented in within the vector strategy, wherein the minimum possible values of the vector of the phase speeds and provides a predetermined voltage with zero static and dynamic minimum possible errors has been designed. Decomposition of formal vector method under matrix converter control, which is to define relationships allowing to obtain analytical description of the vector modulator from the geometrical representation has been performed for the first time. A new finite state machine model of matrix converter control system, wherein the possibility of studying the processes by means of numerical methods of analysis and the technical realization based on a unified mathematical description has been proposed. A subject degree of introduction: used in the development of Zaporizhzhya electrical equipment plant, Scientific and Production Enterprise "KEP", Scientific and Production Association "Power conversion equipment"; recommended for use in the educational process of NTUU "KPI", NTU "KhPI", Zaporizhzhya GIA MONU. Effectiveness of implantation: increase efficiency of complete electrical drives up to 2%. Sphere of use: electrical engineering companies. .