Robust Sliding Mode Control of a Unipolar Power Inverter

Muhammad Awais, Abdul Rehman Yasin, Mudassar Riaz, Bilal Saqib, Saba Zia and Amina Yasin
Additional contact information
Muhammad Awais: Department of Electrical Engineering, The University of Lahore, Lahore 54000, Pakistan
Abdul Rehman Yasin: Department of Electrical Engineering, The University of Lahore, Lahore 54000, Pakistan
Mudassar Riaz: Department of Electrical Engineering, The University of Lahore, Lahore 54000, Pakistan
Bilal Saqib: Department of Electrical Engineering, The University of Lahore, Lahore 54000, Pakistan
Saba Zia: Department of Electrical Engineering, The University of Lahore, Lahore 54000, Pakistan
Amina Yasin: Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al Hofuf 31982, Saudi Arabia

Energies, 2021, vol. 14, issue 17, 1-15

Abstract: The key issue in the practical implementation of the sliding mode (SM) control–based power inverter is the variable switching frequency. This variable switching frequency not only induces electromagnetic interference (EMI) noise, but also reduces the efficiency of the inverter, as the size of the inductor and capacitor does not alter in tandem with this variable frequency. In this context, fixed switching frequency–based SM control techniques are proposed; however, some of them are too complex, while others compromise the inherent properties of SM control. In this research, a fixed frequency SM controller is proposed, which is based on the novel low-pass filter extraction of the discontinuous control signal. This allows the technique to be implemented with fewer hardware components, thus reducing the complications of implementation, while maintaining the robustness and parametric invariance of SM control. A simulation-based comparison with an existing pulse width modulated (PWM) SM controller is presented as the benchmark. In comparison with the sigmoid function SM controller, an improvement of 50% in the settling time along with zero steady-state errors and a further 37% and 42% improvement in the undershoot and overshoot, respectively, is reported in the simulation. A hardware setup is established to validate the proposed technique, which substantiates the simulation results and its disturbance rejection properties.

Keywords: fixed frequency sliding mode control; unipolar single phase inverter; pulse width modulation (PWM); filter extracted equivalent control (FEEC) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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