Experimental verification for a matrix converter with a V-connection AC chopper

This paper proposes a circuit topology for a matrix converter with a boost up function in the input side. The proposed circuit uses a V-connection AC chopper to achieve the boost-up function. The matrix converter and the V-connection AC chopper are independently controlled, where a virtual indirect control method is applied to the matrix converter, and the control of the V-connection AC chopper is an open-loop control with a damping. One problem of this system is the resonance happens between the input reactor and the filter capacitor. In order to suppress the resonance, the damping control is implemented in the AC chopper. In this paper, the operation of the proposed circuit along with the loss analysis is discussed in details. For the simulation and experiment results, the proposed circuit is confirmed obtaining the maximum efficiency of 95.1%, which is higher efficiency than that of a conventional back-to-back converter.