Sparse Matrix Converter
  A sparse matrix-equivalent three-phase ac-dc-ac converter topologies are developed based on the structure of an indirect matrix converter(IMC). The converter topologies exhibit a reduced number of power transistors compared to the CMC or IMC and are therefore designated as the sparse matrix converter(SMC). A safe multistep commutation concept and zero-current commutation method for the SMC is considered.

Block Diagram of the Sparse Matrix Converter

The Sparse Matrix Converter with Z-source network