We propose a minimum current stress control strategy based on virtual frequency for isolated bidirectional AC/DC converters. First

the switching characteristics of the triple phase shift（TPS） control method are analyzed

and the TPS-based phase-shift full-bridge minimum-current stress control algorithm is designed. Then

according to the non-linear characteristics of the output power compared with the shift

a virtual frequency control method is proposed. This algorithm can simplify the nonlinear control to linearization

and can also realize the single-stage conversion of the AC-DC converter

effectively reducing the intermediate bus capacitance and reducing system current stress. Finally

the experimental platform based on TMS320 F28335 verifies the proposed control strategy. The experimental results show that the control strategy in this paper can effectively reduce the current stress of the converter when the power is transmitted in both directions.