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MATLAB Simulation of Dual active bridge dc dc converter

MATLAB Simulation of Dual active bridge dc dc converter


The Blog details the implementation of an active bridge simulation using MATLAB. This simulation involves a high-frequency transformer, two bridges, and control mechanisms to regulate the input and output voltage of the active bridge.



System Architecture

The active bridge simulation consists of two bridges—a high-frequency transformer acts as an intermediary between the input and output sides of the system. The input voltage is fixed at 16 volts, and the output voltage can be varied between 24 volts and 14 volts. The simulation aims to observe the system's response to voltage changes in the output.


Control Mechanism

The output voltage is measured and compared against a reference value. A proportional-integral (PI) controller processes the comparison and generates a phase angle. Phase-shifted modulation is then employed to produce pulses for the active bridge control, both on the input and output sides of the system.


Voltage Change Stimuli

The simulation involves periodic changes in the reference voltage, alternating every 100 milliseconds between 24 volts and 14 volts. This variation in voltage aims to test the system's response and tracking capability against changing output conditions.


Visualization and Response Analysis

The simulation provides a visual representation of the primary and secondary voltages, load voltage, and load current. The comparison between the reference and actual voltages demonstrates the system's ability to effectively track the reference despite fluctuations in the output voltage.


System Performance

Through the simulation, it's evident that the active bridge system successfully tracks the reference voltage, effectively responding to changing output conditions. The visualization and comparison showcase the close alignment between the reference voltage and the system's output, indicating the system's accurate tracking capability.


Conclusion: Successful Active Bridge Tracking

The simulation illustrates the effective tracking of reference voltage by the active bridge system. Despite the periodic changes in the output voltage, the system demonstrates precise alignment with the reference, showcasing its robust control mechanisms and accurate response to varying conditions.

This blog post encapsulates the key aspects of the active bridge simulation, highlighting the system's ability to track reference voltage effectively, ensuring a stable response to changing output conditions.

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