1. (1) R. W. D. Doncker, D. M. Divan, and M. H. Kheraluwala: “A three-phase soft-switched high-power-density dc/dc converter for high-power applications”, IEEE Trans. Ind. Appl., Vol. 27, No. 1, pp. 63-73 (1991)
2. (2) M. H. Kheraluwala, R. W. Gascoigne, D. M. Divan, and E. D. Baumann: “Performance characterization of a high-power dual active bridge dc-to-dc converter”, IEEE Trans. Ind. Appl., Vol. 28, No. 6, pp. 1294-1301 (1992)
3. (3) S. Inoue and H. Akagi: “Operating voltage and loss analysis of a bi-directional isolated dc/dc converter”, IEEJ Trans. Ind. Appl., Vol. 127, No. 2, pp. 189-197 (2007) (in Japanese)
4. (4) T. Yamagishi, H. Akagi, S. Kinouchi, Y. Miyazaki, and M. Koyama: “A 750-V, 100-kW, 20-kHz bidirectional isolated dc/dc converter using SiC-MOSFET/SBD modules”, IEEJ Trans. Ind. Appl., Vol. 134, No. 5, pp. 544-553 (2014) (in Japanese)
5. (5) H. Fujita and H. Akagi: “Pulse-density-modulated power control of a 4kW, 450kHz voltage-source inverter for induction melting applications”, IEEE Trans. Ind. Appl., Vol. 32, No. 2, pp. 279-286 (1996)