Toshiba Mitsubishi-Electric Industrial Systems Corporation

The Ritsumeikan Trust

Yoshitaka Kawabata

Kazunori Sanada

Takao Kawabata

Toshihide Nakano

Hiroshi Masunaga

Kazuki Nishimura

A bidirectional insulated DC/DC converter includes a first single-phase 3-level inverter, a second single-phase 3-level inverter, and an insulated transformer. The first single-phase 3-level inverter generates a first AC voltage between output terminals based on a first DC voltage received from a first DC circuit. The second single-phase 3-level inverter generates a second AC voltage between output terminals based on a second DC voltage received from a second DC circuit. The insulated transformer includes a primary winding that receives the first AC voltage from the output terminals and a secondary winding that receives the second AC voltage from the output terminals.

Bidirectional insulated DC/DC converter and smart network

A bidirectional insulated DC/DC converter narrows a pulse width of an AC fundamental wave voltage corresponding to a higher DC voltage of two DC voltages, to cause effective values of the AC fundamental wave voltages to coincide with each other, and then, sets a phase difference between the AC fundamental wave voltages in accordance with a value and a direction of a current that is desired to flow. Accordingly, even when the difference between the two DC voltages greatly varies, DC power can be stably transmitted and received.

Bidirectional insulated DC/DC converter and smart network using the same

Growing community of inventors

Kusatsu, Japan

Yoshitaka Kawabata