Abstract

Voltage-controlled DC-DC boost converters are used in the electric transport applications for integration of lowvoltage energy sources. Such applications require compact and reliable power converter designs coupled with high-quality steadystate and dynamic control performance. This paper proposes the use of a three-leg interleaved DC-DC boost converter and develops an advanced control scheme based on model linearisation, state feedback and extended observer. To support its design and implementation, the paper provides closed-form solutions for the discrete-time models and for all coefficients and gains used by the control. The proposed control is then tested by simulation in Matlab/Simulink and shows superior dynamic performance compared to PI control. Experimental validation in underway. © 2025 IEEE.