Abstract
In this paper, we propose adaptive nonlinear controllers for the Single-Ended Primary Inductance Converter (SEPIC). We also consider four distinct situations: AC-DC, DC-DC, Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM). A comparative analysis between classic linear and nonlinear approaches to regulate the control loop is made. Three adaptive nonlinear control laws are designed: Feedback Linearization Control (FLC), Passivity-Based Control (PBC) and Interconnection and Damping Assignment Passivity-Based Control (IDAPBC). In order to compare the performance of these control techniques, numerical simulations were made in Software and Hardware in the Loop (HIL) for nominal conditions and operation disturbances. We recommend adaptive controllers for the two different situations: Adaptive Passivity-Based Feedback Linearization Control (APBFLC) for the PFC (Power Factor Correction) AC-DC system and IDAPBC-BB (IDAPBC Based on Boost converter) for the regulator DC-DC system.
Highlights
Conventional power supplies usually only have one full-bridge diode rectifier and one large capacitive filter in the input stage
In order to analyze the operation of the Single-Ended Primary Inductance Converter (SEPIC) Power Factor Correction (PFC) converter, numerical simulations were performed in software for both the nominal condition and disturbances in the operation of this converter, by analyzing the Power Factor (PF) on the AC side, the harmonic distortion (THDi) of the input current and the DC side voltage regulation
A comparative analysis between linear and nonlinear control; the proposal of an adaptive nonlinear control without current measurement in the intermediate inductor and with low harmonic distortion: Adaptive Passivity-Based Feedback Linearization Control (APBFLC); recent Interconnection and Damping Assignment Passivity-Based Control (IDAPBC) methods adapted from the boost converter adjusted to the SEPIC converter with very low overshoot in view of load disturbances: IDAPBC-BB; Hardware in the Loop (HIL) simulation of nonlinear control techniques applied to DC-DC SEPIC in Conduction Mode (CCM) mode
Summary
Conventional power supplies usually only have one full-bridge diode rectifier and one large capacitive filter in the input stage. The operation characteristics, the modeling and control system of the SEPIC PFC converter in CCM and DCM are presented. In order to analyze the operation of the SEPIC PFC converter, numerical simulations were performed in software for both the nominal condition and disturbances in the operation of this converter, by analyzing the Power Factor (PF) on the AC side, the harmonic distortion (THDi) of the input current and the DC side voltage regulation. A comparative analysis between linear and nonlinear control; the proposal of an adaptive nonlinear control without current measurement in the intermediate inductor and with low harmonic distortion: APBFLC; recent IDAPBC methods adapted from the boost converter adjusted to the SEPIC converter with very low overshoot in view of load disturbances: IDAPBC-BB; HIL simulation of nonlinear control techniques applied to DC-DC SEPIC in CCM mode.
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