Verification of effectiveness of a matrix converter with boost-up AC chopper by using an IPM motor

Abstract

This paper describes the matrix converter that features boost-up functionality. The proposed circuit topology connects a V-connection AC chopper at the input side of the matrix converter to achieve the boost-up function. The matrix converter and the V-connection AC chopper are controlled independently, where a virtual indirect control method is applied to the matrix converter, and an open-loop control is applied to the V-connection AC chopper. However, the efficiency of the proposed circuit is low due to the extra loss from the V-connection AC chopper. In this paper, the efficiency of the proposed circuit and the conventional matrix converter is evaluated by using a 3.7kW IPM motor in the simulation and the experiment. The simulation results confirm that by implementing field-weakening control in the conventional matrix converter, the losses are lower than that of the proposed circuit topology, where the proposed circuit improves the efficiency by 12%. According to the experimental results, it is obtained that the proposed circuit can improve the efficiency of 13% in compare with the conventional matrix converter.