SLIDING MODE CONTROLLER DESIGN BASED ON AVERAGING MODEL FOR ELECTRIC VEHICLE SYSTEMS

Abstract

Driven by increasing concerns over greenhouse gas emissions from conventional combustion vehicles, electric vehicles (EVs) have gained rapid popularity. Their efficient operation depends on a control system for the power electronic circuits integrated within the vehicle architecture. This article presents a sliding mode controller design for a bidirectional half-bridge DC-DC converter deployed in battery EV (BEV) systems. The design is based on a sliding surface equation formulated as a linear combination of state variables and a mathematical model derived from the generalized state-space averaging method for computing the control signal equation. The controller parameters are selected via a trial-and-error approach. Simulations using MATLAB/SIMULINK demonstrate that the proposed sliding mode controller regulates the DC bus voltage in compliance with ISO 21498-1,2 standards under varying load conditions and exhibits robustness against system parameter variations. This confirms that the electric powertrain system of the vehicle can operate effectively.