Zero‐steady‐state‐error compensation method in application of peak current mode buck converter with fast transient response

Yao, Yunpeng; Xu, Shen; Lu, Shengli; Sun, Weifeng

doi:10.1049/iet-pel.2014.0436

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Thus, a well‐designed feedback controller is generally required for highly dynamic and stable operation over widely varying operating conditions. The conventional off‐line feedback controller design directly uses the values of power‐stage components [4, 5] without accounting for the uncertainties involved mainly due to ageing and manufacturing tolerances. These variations can adversely affect the actual performance of the designed controller [6].…”

Section: Introductionmentioning

confidence: 99%

Non‐intrusive parameter estimation method for autotuned DC–DC converter based on quasi‐impulse response

Ali

Loo

Lai

2018

IET Power Electronics

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A non-intrusive method to estimate the values of power-stage components online and autotuning of feedback compensator for digitally controlled power converters is presented in this study. By using buck converter as an example, the presented autotuning controller has been designed to cover the wide-range variations in equivalent series resistance zero of the output capacitor and the resonant frequency of output filter L o C o. These two frequencies are estimated by examining the converter's quasi-impulse response during start-up and by measuring the output-voltage ripple during steady-state operation of the converter. Hence, due to the non-intrusive characteristic of the proposed control method, the operation of the converter is not affected. Using the acquired results, the online digital compensator is tuned automatically based on predefined crossover frequency and phase margin to provide the required output-voltage regulation and transient response under wide-range variations in the power-stage component values. To validate the effectiveness of the proposed control method, experimental results from a 12 to 1.5 V buck converter are presented.

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Section: Introductionmentioning

confidence: 99%

Non‐intrusive parameter estimation method for autotuned DC–DC converter based on quasi‐impulse response

Ali

Loo

Lai

2018

IET Power Electronics

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“…In some offset-free approaches the difference between system and predicted model outputs is utilized to correct the predictions in the multistep output recursive prediction [11]. In [12,13], the classical control structure along with the resonant controller is used to achieve zero steady-state tracking error in the current control of the inverters and converters. A robust approach for estimating and rejecting the disturbance uses a disturbance observer (DOB) that is studied in both time and frequency domains [14].…”

Section: Introductionmentioning

confidence: 99%

Offset-free adaptive nonlinear model predictive control with disturbance observer for DC-DC buck converters

Vatankhah¹,

Farrokhi²

2017

Turk J Elec Eng & Comp Sci

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Abstract:The aim of this paper is to design a nonlinear model predictive control for DC-DC buck converters to track constant reference signals with zero steady-state error. The online trained neural network (NN) model is employed as the predictor and the steady-state error, which is called the offset, is studied in the presence of the changes in system parameters and the external disturbances. The stability of the closed-loop system is investigated using the Lyapunov direct theory. The proposed method can provide offset-free behavior in the presence of constant disturbances. For rejecting nonconstant disturbances, a nonlinear disturbance observer based on the NN inverse model is proposed. Due to wide applications of the DC-DC converter in power electronics, control of its output voltage is considered in this paper.The effectiveness of the proposed control method is demonstrated by experimental results.

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“…In case of load current change in a short period, an unstable supply voltage of a dc–dc converter may cause irregular operation or degrade the performance of the portable gadgets. Therefore, fast recovery time with small transient ripple is an important design consideration in dc–dc converters [1–5].…”

Section: Introductionmentioning

confidence: 99%

Area‐efficient error amplifier with current‐boosting module for fast‐transient buck converters

Liu

Chen

Hsu

2016

IET Power Electronics

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The current boosting module (CBM) is proposed to be implemented in an error amplifier (EA) for improving the load transient of a dc-dc converter. To enhance the slew rate of the EA during transient, the CBM is adopted to raise/ reduce the gate voltages of the output-stage transistors of the EA for enhancing its current driving capability with simple circuitry. Moreover, to save power consumption in steady state, the accelerative mechanism of the EA is turned off. A buck converter with CBM is implemented with 0.35 μm 2P4M complementary metal-oxide-semiconductor process. The experimental results demonstrate that the recovery time and transient ripple of the buck converter are improved by over ten times and two times, respectively, compared with those of the buck converter without CBM, for a 450 mA load current change. The maximum power conversion efficiency is 92.8% when the input and output voltages are 4 and 2.5 V, respectively. Hence, the buck converter with CBM can concurrently fulfil the functionalities of fixed switching frequency and fast load transient.

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Zero‐steady‐state‐error compensation method in application of peak current mode buck converter with fast transient response

Cited by 5 publications

References 24 publications

Non‐intrusive parameter estimation method for autotuned DC–DC converter based on quasi‐impulse response

Non‐intrusive parameter estimation method for autotuned DC–DC converter based on quasi‐impulse response

Offset-free adaptive nonlinear model predictive control with disturbance observer for DC-DC buck converters

Area‐efficient error amplifier with current‐boosting module for fast‐transient buck converters

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