Fixed frequency sliding mode controller for the buck converter

Abrishamifar, Adib; Ahmad, Ahmad Ale; Elahian, Samaneh

doi:10.1109/pedstc.2011.5742481

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…So the PWMmodulated smoothed control law is utilized for practical implementation and achieves a fixed-frequency SM control. A boundary layer of width δ is introduced to reduce the chattering problem in the neighborhood of the sliding surface [30]. The control law is smoothed in a narrow boundary layer instead of the discontinuous control law.…”

Section: Pwm Based Hysteresis Sliding Mode Controlmentioning

confidence: 99%

“…The PWM slope of the carrier signal must be higher than that of the input signal. In [30], the slope of the carrier is given as follows:…”

Section: Pwm Based Hysteresis Sliding Mode Controlmentioning

confidence: 99%

“…In [30], a fixed frequency SMC is proposed, where the discontinuous sign function is replaced by the smoothed control law within the specific boundary limits. This achieves the fixed switching frequency by PWM implementation of this control law.…”

Section: Introductionmentioning

confidence: 99%

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Robust Sliding Mode Control of a Unipolar Power Inverter

et al. 2021

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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.

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Section: Pwm Based Hysteresis Sliding Mode Controlmentioning

confidence: 99%

“…The PWM slope of the carrier signal must be higher than that of the input signal. In [30], the slope of the carrier is given as follows:…”

Section: Pwm Based Hysteresis Sliding Mode Controlmentioning

confidence: 99%