Fixed-Frequency Sliding-Mode Control Scheme Based on Current Control Manifold for Improved Dynamic Performance of Boost PFC Converter

Abstract

This paper deals with the switching regulation of Boost PFC converter under large and quick load fluctuation to ensure tight output voltage regulation and unity power factor (UPF) at line side. In this sense, Sliding Mode Control (SMC) technique based on current controlled manifold is proposed. Input current distortion is limited even during light loading condition. Also, the dead-zone issue related to light load near to the crossover of input current is resolved in this paper. To execute the proposed SMC algorithm, equivalent control approach is used for the selection of sliding coefficients, ensuring the system stability. The control operation manipulates both inner SM current controller to frame input current and an outer PI controller to maintain desired regulated output voltage. For experimental validation, a 500W, 390V/DC boost PFC prototype, controlled by dSPACE 1104 signal processor is framed. The presented simulation and experimental results infer that the proposed converter controller offers UPF, tight output voltage regulation and %THD (Total Harmonic Distortion) standard even under fluctuating load behaviour. In this paper, the performance of the proposed control scheme is experimentally verified with different load behaviour and external references, which explains the robustness and effectiveness of the proposed system.

Controlling and Analysis of Boost converter using Sliding mode controller at variable Conditions

“…Current SMC is used for regulation, due to which voltage loop high frequency switching and reference is currently highly sensitive to uncertainties. Therefore, the sliding surface is for better performance; [4][5][6][7][8] (4) where , and are the control parameters, generally stated as sliding coefficients and 1 , 2 and 3 are called as the desired state feedback variables which are to be controlled. And it can be represented in terms of the controlled state variable like as; (10) From the sliding surface 10, the controller is driven and is executed through a PWM, comparing (duty ratio of the PWM controller).…”

A Sliding Surface-Regulated Current-Mode Pulse-Width Modulation Controller for a Digital Signal Processor-Based Single Ended Primary Inductor Converter-Type Power Factor Correction Rectifier

“…For realizing a high-performance PWM rectifier, full-order model-based controllers for the rectifier were often developed [15,24,27]. However, there will become complex if the full-order model of (3) is taken for the controller development for the high-performance SEPIC-type rectifier.…”

“…From the above two cases and Figure 3, one can conclude as follows: when S c > 0, i.e., i L1 − i re f > 0, the power switch of the PWM rectifier should be turned off to decrease the current of the inductor L 1 of the SEPIC rectifier. In this situation, the rate of change of the current in the inductor L 1 must be descent more than that of the reference command, as given in (27). Contrarily, when S c < 0, i.e., i L1 − i re f < 0, the power switch should be turned on to increase the current of the inductor L 1 .…”

“…Therefore, according to (27) and (29), the stability of (19) with the controller of (21) can be further explored in the following. Using (32) and (21), when S c > 0, (27) can be rewritten as: Multiplying Φ/D to the both side of (33) and rearranging it get:…”

Design, analysis, and implementation of an integral terminal reduced‐order sliding mode controller for a self‐lift positive output Luo converter via Filippov's technique considering the effects of parametric resistances

“…The PWM switching‐based sliding mode controller (SMC) is also used for the duty ratio control of converters . In this method, the sliding surface is indirectly enforced to converge to its equilibrium point.…”