Abstract

A single-phase-shift control (SPS) plus variable-frequency control (VF) control strategy for isolated bidirectional AC/DC converters is proposed. The isolated bidirectional AC/DC converter topology consists of a dual active bridge (DAB) and a synchronous rectifier (SR). The proposed strategy converts the non-linear relationship between shift compared to output power in single phase shift control into a linear one by means of frequency control, making the control simple. The transfer function of the control is obtained by modelling the DAB small signal system and the optimal control parameters are obtained after frequency domain analysis. At the same time, the control method can effectively reduce the switching losses and the smaller value of the intermediate capacitor parameter reduces the size of the converter. The control principle of this isolated bi-directional AC/DC converter is described and analyzed in detail, and finally the correctness and effectiveness of the proposed control strategy is verified by simulation.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.