Effect of component design on the DC/DC power converters dynamics

Duong, Minh Quan; Nguyễn, Huy Hoàng; Nguyễn, Thanh Hải; Nguyễn, Thành Trung; Sava, Gabriela Nicoleta

doi:10.1109/atee.2017.7905025

Cited by 10 publications

(6 citation statements)

References 2 publications

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“…Equations ( 29) and ( 30) is the control law 𝑢 * 𝜖 [0 − 1] at the equilibrium point and ( 30) is the current 𝑥 1 * in terms of the output voltage 𝑥 2 * at the equilibrium point, show that we are working with a Buck converter. It is important to remember that the control law is given by the ratio of the output voltage over the input voltage for this converter [39] and that 𝑥 2 = 𝑣, as expressed by (14). The control can be implemented with the steady state variables and a basic PWM.…”

Section: Buck Converter Modelingmentioning

confidence: 99%

“…Like the Buck converter, the error model for the Boost converter can be obtained using the dynamical equations. Equations ( 36) and (37) show that we are working with a Boost converter [39].…”

Section: Boost Converter Modelingmentioning

confidence: 99%

“…By adding the error to the system through ( 25) and ( 26) in ( 17) and ( 18) and simplifying, (38) and (39) are obtained:…”

Section: Boost Converter Modelingmentioning

confidence: 99%

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Voltage Regulation in Second-Order Dc-Dc Converters Via the Inverse Optimal Control Design with Proportional-Integral Action

Gómez-Chitiva

Escalante-Sarrias

Montoya

2022

TecnoL.

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This article addresses the problem regarding power regulation in classical DC-DC second-order converters by means of a nonlinear control technique based on inverse optimal control theory. There are few papers that describe inverse optimal control for DC-DC converters in the literature. Therefore, this study constitutes a contribution to the state of the art on nonlinear control techniques for DC-DC converters. In this vein, the main objective of this research was to implement inverse optimal control theory with integral action to the typical DC-DC conversion topologies for power regulation, regardless of the load variations and the application. The converter topologies analyzed were: (i) Buck; (ii) Boost; (iii) Buck-Boost; and (iv) Non-Inverting Buck-Boost. A dynamical model was proposed as a function of the state variable error, which helped to demonstrate that the inverse optimal control law with proportional-integral action implemented in the different converters ensures stability in each closed-loop operation via Lyapunov’s theorem. Numerical validations were carried out by means of simulations in the PSIM software, comparing the established control law, the passivity-based PI control law, and an open-loop control. As a conclusion, it was possible to determine that the proposed model is easier to implement and has a better dynamical behavior than the PI-PBC, ensuring asymptotic stability from the closed-loop control design.

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Section: Buck Converter Modelingmentioning

confidence: 99%

Section: Boost Converter Modelingmentioning

confidence: 99%

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Voltage Regulation in Second-Order Dc-Dc Converters Via the Inverse Optimal Control Design with Proportional-Integral Action

Gómez-Chitiva

Escalante-Sarrias

Montoya

2022

TecnoL.

View full text Add to dashboard Cite

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“…Direct current (DC)-DC converters, which are used, e.g., in switch mode power supplies and semiconductor devices, also contain magnetic elements used to store electrical energy [1]. In recent years, more and more papers focused on modeling power losses in magnetic elements and on examining the influence of power losses in these elements on the characteristics of electronic equipment [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of Power Losses in the Inductor Core on Characteristics of Selected DC–DC Converters

Górecki

Detka

2019

Energies

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The paper presents the results of a computer simulation illustrating the influence of power losses in the core of an inductor based on the characteristics of buck and boost converters. In the computations, the authors’ model of power losses in the core is used. Correctness of this model is verified experimentally for three different magnetic materials. Computations are performed with the use of this model and the Excel software for inductors including cores made of ferrite, powdered iron, and nanocrystalline material in a wide range of load resistance, as well as input voltage of both the considered converters operating at different values of switching frequency. The obtained computation results show that power losses in the inductor core and watt-hour efficiency of converters strongly depend on the material used to make this core, in addition to the input voltage and parameters of the control signal and load resistance of the considered converters. The obtained results of watt-hour efficiency of the considered direct current (DC)–DC converters show that it changes up to 30 times in the considered ranges of the mentioned factors. In turn, in the same operating conditions, values of power losses in the considered cores change from a fraction of a watt to tens of watts. The paper also considers the issue of which material should be used to construct the inductor core in order to obtain the highest value of watt-hour efficiency at selected operation conditions of the considered converters.

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“…However, with the increase in applied voltage, the corona discharge around the conductor bundles becomes more severe and can engender audible noise (AN), which is more serious and irritating in high-voltage transmission lines [2][3][4][5]. Therefore, AN level is an important limiting factor for the design of overhead line conductors.…”

Section: Introductionmentioning

confidence: 99%

Audible Noise Performance of Conductor Bundles Based on Cage Test Results and Comparison with Long Term Data

Wan

Pei

et al. 2017

Energies

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Abstract:A reasonable acoustic power formula is vital to precisely evaluate the audible noise (AN) level of ultra-high-voltage (UHV) AC power lines. This study derived a formula by taking several AN measurements under heavy rain conditions, using multiple conductor bundles in a UHV corona cage, and then subjecting these measured values to least squares fitting. The validity of the proposed formula was subsequently verified with statistical data obtained from two long-term stations at Henan and Hubei Province, which are located under the Jindongnan-Nanyang-Jingmen UHV AC transmission lines operating at 1000 kV. The deviation between the prediction and the long-term (L50) value was 0.76 dB for the Henan station and 0.17 dB for the Hubei station. It shows that the acoustic power formula derived in this paper is more accurate than the widely used Bonneville Power Administration formula, in which the corresponding deviations are much larger (3.07 and 2.53 dB).

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Effect of component design on the DC/DC power converters dynamics

Cited by 10 publications

References 2 publications

Voltage Regulation in Second-Order Dc-Dc Converters Via the Inverse Optimal Control Design with Proportional-Integral Action

Voltage Regulation in Second-Order Dc-Dc Converters Via the Inverse Optimal Control Design with Proportional-Integral Action

Influence of Power Losses in the Inductor Core on Characteristics of Selected DC–DC Converters

Audible Noise Performance of Conductor Bundles Based on Cage Test Results and Comparison with Long Term Data

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