Bidirectional Converter with ANN-Based Digital Control and State Transitions

Abstract

Bidirectional converters are used where bidirectional power flow is required. It reduces the space occupied drastically as compared to the individual converters utilized otherwise. Usually, the system contains a push–pull conversion stage on the lower voltage side (LV) and a full-bridge phase shift conversion stage on the higher voltage side (HV). The transitioning between buck and boost stages in a bidirectional converter is not subject to high currents and voltages which increases the life of the system and its dependability. Bidirectional converters that are isolated in circuit are normally utilized in electric vehicles as well as data storage applications where between the higher voltage side and lower voltage side, power flow is observed. The system execution incorporates the power flow between the higher voltage side and lower voltage side by using a current sustained push–pull conversion stage on the lower voltage side and a PSFB stage that synchronously rectifies the power flow to the lower voltage side. The limitations faced during the implementation of this system are: (1) quick and consistent transition from buck to boost mode and vice versa; (2) during the reverse power in the push–pull converter, the rectification of the high-voltage bridge.