High Frequency Link Ripple Power Compensation Strategies for 1-ϕ Bidirectional AC-DC Matrix Converters

Inherent ripple power compensation required during the 1-φ operation of direct matrix converters needs to be addressed in order to improve their power density, reliability, cost effectiveness, etc. Existing solutions in literature are scarce; most of the papers relevant to matrix converters are implemented either at the low frequency AC side of the matrix converter or at the DC port side. Two circuits are described in this paper that perform active ripple power compensation of direct matrix converter based high frequency isolated bidirectional AC-DC converters while operating at the high frequency link of the converter. Relevant analysis is given to explain the working principle of the topologies, and simulation results for a 3.45 kW electric vehicle charger, with a 230 V (RMS) AC grid input, feeding a 400 V battery are presented to illustrate the findings.