Parameter-Variation-Tolerant Robust Current Sensorless Control of a Single-Phase Boost PFC

Chandwani, Ashwin; Dey, Saikat; Mallik, Ayan

doi:10.1109/jestie.2021.3128809

Cited by 15 publications

(6 citation statements)

References 16 publications

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“…As the HFPT parameters are prone to change in temperature, operating condition and layout, it is important to understand the effect of variation of the tank parameters with respect to change in resultant gain, optimum phase and operational frequency of the system. To elucidate this change, a sensitivity term (𝑆 y r ) [29] is introduced, that is defined as the relative change in the parameter M with respect to relative variation in parameter N.…”

Section: Sensitivity Analysis Of the Hfpt Componentsmentioning

confidence: 99%

Parasitic Component Inclusive Optimum Phase-Frequency Contour Enabled Synchronous Rectification of Asymmetric CLLC Resonant Converter

Chandwani

Mallik

Aktruk

2023

IEEE Open J. Power Electron.

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With an objective to reduce the switching losses in a bidirectional resonant CLLC DC/DC converter for electric vehicle (EV) charging applications, this paper presents an elaborate frequency dependent general harmonic approximation (GHA) based secondary side turnoff current minimization technique by investigating the optimum operating point to achieve synchronous rectification (SR). Formulation of an accurate all-inclusive gain model is presented, specifically focusing on effect of parasitic components on the resultant gain-frequency trend, backed with thorough experimental validation. Further, meticulous modeling of the GHA based state equations is presented to obtain a contour of feasible operational frequencies and corresponding phase shifts to ascertain accurate SR operation with a multi-dimensional optimization technique to ensure reduced switching losses. In addition to that, to precisely characterize the resonant tank equivalent circuit, stressing on its effect on SR phase calculation, a detailed 3D finite element analysis (FEA) based R-L-C modelling of the employed high frequency planar transformer (HFPT) is explained. To validate and benchmark the performance of the proposed gain model while ensuring accurate SR operation, a 1kW all-GaN based CLLC experimental prototype is developed for a resonant frequency of 500kHz, with a power density of 106 W/inch 3 . Experimental waveforms at corner conditions are presented for a wide-gain bidirectional operation, portraying a peak converter efficiency of 98.49%.

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Section: Sensitivity Analysis Of the Hfpt Componentsmentioning

confidence: 99%

Parasitic Component Inclusive Optimum Phase-Frequency Contour Enabled Synchronous Rectification of Asymmetric CLLC Resonant Converter

Chandwani

Mallik

Aktruk

2023

IEEE Open J. Power Electron.

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“…In order to estimate the inductor-current, an inductor-current estimator is first proposed here, and a DSP is used to estimate the inductor-current. To our best knowledge, no previous papers have investigated this issue [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The basic principle of the inductor-current estimation method is discussed as follows.…”

Section: Inductor-current Estimationmentioning

confidence: 99%

“…Chen et al proposed a feedforward duty-cycle control for boost PFC circuits to reduce input AC current harmonics [11]. Mallik used a duty compensation control for PFC circuits [12], and Chandwani et al investigated the effects of the distortion of the grid voltage, ripples of the output voltage, and load changes for boost PFC circuits [13]. In addition, a variation-tolerant robust current control was studied for these PFC circuits as well.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, predictive control has been widely used in power electronics. However, these previously published papers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], did not discuss this issue. In addition, the sensorless-current control algorithms of inductor-voltage estimation and inductorcurrent estimation were not compared.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, two predictive controllers are used for this sensorless PFC circuit to effectively improve its dynamic responses. To the authors' best knowledge, the ideas of these two sensorless methods and the use of predictive control are original and have not been published in previous papers [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. These are the main contributions of this paper are discussed as follows:…”

Section: Introductionmentioning

confidence: 99%

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Design and implementation of power factor corrected circuits without using inductor‐current sensors

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Wang

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This paper investigates the design and implementation of a new single‐phase sensorless power factor corrected (PFC) circuit. Here, the inductor‐current sensor and its sensing circuit are removed. As a result, the cost and volume of the PFC circuit are effectively reduced. Two different methods, including an inductor‐voltage estimation method and an inductor‐current estimation method, are proposed and compared. To improve the dynamic responses of the PFC circuit, predictive voltage control and predictive current control are implemented here. A digital signal processor, type TMS‐320F‐2808, manufactured by Texas Instruments, is used here as the control centre to execute the sensorless methods and control algorithms. A 400 W, 50 kHz switching frequency, single‐phase alternating current (AC) 110 V /DC 300 V PFC circuit is implemented. The measured results validate the feasibility and correctness of the proposed methods. This proposed sensorless PFC circuit can be widely applied in industry due to its simplicity.

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Parameter-Variation-Tolerant Robust Current Sensorless Control of a Single-Phase Boost PFC

Cited by 15 publications

References 16 publications

Parasitic Component Inclusive Optimum Phase-Frequency Contour Enabled Synchronous Rectification of Asymmetric CLLC Resonant Converter

Parasitic Component Inclusive Optimum Phase-Frequency Contour Enabled Synchronous Rectification of Asymmetric CLLC Resonant Converter

Design and implementation of power factor corrected circuits without using inductor‐current sensors

A Review of LED Driver Topologies and Control Methods for Energy-Efficient Smart Farming Application

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