Theoretical Analysis of a Three-Phase Bidirectional Isolated DC-DC Converter Using Phase-Shifted Modulation

Zhong Yih Tan (Universiti Tenaga Nasional)
Nadia Mei Lin Tan (Universiti Tenaga Nasional)
Ida Suzana Hussain (Universiti Tenaga Nasional)

International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 9, No 2: June 2018

A three-phase bidirectional isolated dc-dc converter consists of two six-pulse two-level active converters that enable bidirectional power flow by introducing a lag phase-shift angle of one converter with respect to the other converter. This paper explains the operating modes of a three-phase bidirectional isolated dc-dc converter in detail, taking into account the transfer of energy between the dc voltage sources and high-frequency ac inductances in the three-phase bidirectional isolated dc-dc converter. The power flow of the dc-dc converter is also examined based on the operating modes.