Sliding mode control of quadratic boost converters based on min-type control strategy

• Published in: IEEE access Vol. 11; p. 1
• Main Authors: Alonge, Francesco, D'Ippolito, Filippo, Garraffa, Giovanni, Giaconia, Giuseppe Costantino, Latona, Rosario, Sferlazza, Antonino
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01-01-2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Control systems; Electric potential; Frequency control; Fuel cells; Hybrid systems; Linear matrix inequalities; Low-cost hardware implementation; min-type control; Parameter uncertainty; Pulse width modulation; Quadratic boost converter; Sliding mode control; Switches; Topology; Tracking errors; Voltage; Voltage control
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2023.3267984

The paper deals with the control of a quadratic boost converter supplied by low-voltage energy sources, such as photovoltaic panels, fuel cells, or batteries. The control scheme consists of two control loops. A min-type controller governs the inner loop to force the current state of the nominal model to converge in a neighborhood of the equilibrium state. The external loop processes the output tracking error using an integrator, and it allows reconfiguring the converter's working point by changing the equilibrium state given in the input to the internal loop. This configuration assures both zero tracking error of the output voltage and robustness against load and input voltage variations and converter parameter uncertainties. The stability of the whole system is investigated using the hybrid system framework. The proposed control technique has been tested experimentally in a suitably developed (low-cost) setup, and the results show the effectiveness of the proposed approach.