The Incorporating ANFIS-based current regulation into a multi-active full bridge converter for reducing current ripple

Abstract

   A multi-active full bridge converter is a type of DC-DC converter typically used in high-power applications like renewable energy systems, electric vehicles, or uninterruptible power supplies. Four switches (often MOSFETs or IGBTs) grouped in an H-bridge configuration make up the full bridge topology. The term "multi-active" implies that the power conversion involves a number of active components, which may indicate complicated switching management for improved efficiency and regulation. Changing the phase shift between two switch pairs is how phase-shifted full-bridge converters are controlled. Without altering the switching frequency, the output voltage can be controlled by adjusting the phase difference between the bridge's two legs (S1-S4 and S2-S3). To lower switching losses, soft switching strategies like ZVS or ZCS might be used.

improving overall efficiency. In this approach, the current through the switches is monitored and controlled to improve transient response and stability. Typically implemented in combination with voltage mode control, it ensures better regulation, especially in systems with fast load changes. The secondary side full bridge switches are controlled by current feedback phase delay controller which restricts the battery charge current. Each EV battery has its own charge current limit which is set in the current controller for battery protection. The controlled charge current improves the charge efficiency of the EV battery increasing the reliability of the cells and the overall circuit. The charge control which is a conventional PI controller is further updated with ANFIS for better stability in the EV battery charging current. A comparative analysis with PI and ANFIS controllers is proposed and the results are generated with same rating of EV batteries and system parameters.