Application of Matrix Converter for Large Induction Machines

This paper proposes the use of a direct AC-AC matrix converter, as an alternative to the DC-link voltage-sourced converter, for large induction machines. A switching strategy is developed to operate the matrix converter based induction machine in sub- and super-synchronous motoring and generating modes. A steady-state model for the matrix converter based induction machine is developed and used to design a controller through a systematic approach. Performance of the matrix converter based induction machine in sub- and super-synchronous motoring and generating modes of operation as well as smooth transition of the machine through the synchronous speed are evaluated.