Sliding-mode control of single input multiple output DC-DC converter

Area of Science:

• Electrical Engineering
• Power Electronics
• Control Systems

Background:

• Vehicle power systems require multiple voltage levels, traditionally met by complex and costly converters.
• Existing solutions often involve independent multiple output DC-DC converters with complicated control schemes.

Purpose of the Study:

• To design a novel Single-Input Multiple-Output (SIMO) DC-DC converter with a sliding mode controller (SMC).
• To provide a cost-effective and structurally simple solution for generating high-voltage DC bus and middle-voltage outputs for automotive applications.
• To enhance the performance and dynamic capabilities of SIMO DC-DC converters through advanced control algorithms.

Main Methods:

• Design of a novel SIMO DC-DC converter topology.
• Application of sliding mode control (SMC) for enhanced performance.
• Development and implementation of a novel SMC-PID control algorithm, integrating Proportion Integration Differentiation (PID) control with SMC.
• MATLAB/SIMULINK simulation and hardware prototype development using a Digital Signal Processor (DSP).

Main Results:

• The proposed SIMO DC-DC converter successfully boosts low voltage to controllable high-voltage and middle-voltage outputs.
• The SMC-PID control algorithm demonstrated excellent dynamic performance and robustness against uncertainties and disturbances.
• Simulation and hardware prototype results validated the converter's ability to track required trajectories.

Conclusions:

• The novel SIMO DC-DC converter with SMC-PID control offers a simple, low-cost, and high-performance solution for vehicle power systems.
• The integrated SMC-PID control enhances dynamic ability and robustness, outperforming conventional SMC.
• This approach provides an efficient method for managing diverse voltage requirements in modern vehicles.