Sadao Ishii

Bidirectional dc-ac conversion topology using matrix converter technique

The matrix converter is a power conversion topology, directly connecting the input and output with bidirectional switches. It has advantages such as high reliability and long life, bidirectional power flow and reduced current harmonics. This paper proposes a bidirectional dc-ac conversion topology with step-up and step-down capabilities using matrix converter technique. Detail of circuit operation and experimental results for various operating conditions will be described using a 1.0kW prototype.

Bidirectional DC-AC current source inverter using coupled inductor

This paper proposes a new current source inverter using a coupled inductor, which is derived from the circuit of the matrix converter using an additional inductor. The proposed circuit has the bidirectional power conversion ability, providing step-up and step-down operation in each direction, and can switch the direction of the power flow instantaneously. This paper describes the principle of operation, the simulation results and the experimental results of the proposed circuit.