Fault-Tolerant Scheme of Load-Side Transistors Applied to Three-Phase Dual Active Bridge DC-DC Converters

JONATHAN E. OCHOA SOSA; RUBÉN O. NÚÑEZ; G. ELIAS OGGIER; GERMÁN G. OGGIER; GUILLERMO O. GARCÍA

REVISTA IBEROAMERICANA DE AUTOMATICA E INFORMATICA INDUSTRIAL

COMITE ESPANOL AUTOMATICA CEA

Lugar: Valencia; Año: 2022

1697-7912

This work proposes a fault-tolerant new mode operation applied to three-phase dual active bridge dc-dc converters (CPDA3)when a transistor open-circuit fault occurs on the load-side bridge. The proposal is to modify the signals of transistor activation, inorder to keep the power transfer within certain limits after reconfiguration. This approach does not introduce additional computationalcosts and does not require the incorporation of additional components or circuits to the original topology. The maximum powerthat can be transferred is larger compared to previous proposals. In addition, the output voltage ripple is significantly reduced, whichallows the expected lifetime of the filter capacitors to be increased. Simulation and experimental results of a 1.5 kW prototype arepresented to validate the theoretical analysis and the feasibility of the proposal.