scholarly journals Average and Small Signal Modeling of Negative-Output KY Boost Converter in CCM Operation

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Faqiang Wang ◽  
Jing Li ◽  
Xikui Ma
Keyword(s):  
Output Voltage ◽  
Averaging Method ◽  
Transfer Functions ◽  
Boost Converter ◽  
Small Signal ◽  
Signal Model ◽  
Boost Converters ◽  
Small Signal Model ◽  
Small Signal Modeling ◽  
Negative Output

Negative-output KY Boost converter, which can obtain the negative output voltage and could be driven easily, is a good topology to overcome traditional Boost and Buck-Boost converters and it is believed that this converter will be widely used in engineering applications in the future. In this study, by using the averaging method and geometrical technique, the average and small signal model of the negative-output KY Boost converter are established. The DC equilibrium point and transfer functions of the system are derived and analyzed. Finally, the effectiveness of the established model and the correctness of the theoretical analysis are confirmed by the circuit experiment.

Small-Signal Modeling of the LLC Half-Bridge Resonant Converter

2019 ◽  
Vol 28 (04) ◽  
pp. 1950063
Author(s):  
Jianguang Ma ◽  
Xueye Wei ◽  
Liang Hu ◽  
Junhong Zhang
Keyword(s):  
High Power ◽  
Experimental Result ◽  
Order System ◽  
Small Signal ◽  
Resonant Converter ◽  
Signal Modeling ◽  
Signal Model ◽  
Small Signal Model ◽  
Proposed Model ◽  
Small Signal Modeling

This paper proposes a small-signal modeling method for building an LLC half-bridge resonant converter. In recent years, the LLC half-bridge resonant converter has attracted the attention of many researchers because of its high-power conversion efficiency and high-power density. Generally, the LLC half-bridge resonant converter consists of many passive components, including stray and parasitic elements, resulting in a high-order system. Because the fundamental harmonic approximation (FHA) method for an LLC resonant converter only considers the fundamental harmonic and neglects higher harmonics, it is not accurate and introduces large errors in a higher-order system. In this paper, according to the operation principle of the LLC half-bridge resonant converter, a small-signal model is established. Based on the small-signal model, the input-to-output and control-to-output transfer function is derived. The experimental result verified that the proposed model yields a high accuracy, thereby highlighting the usefulness and versatility of the proposed model over other existing models.

Small-signal model and control of the interleaved two-phase coupled-inductor boost converter

2016 ◽  
Author(s):  
Brendan C. Barry ◽  
John G. Hayes ◽  
Robert T. Ryan ◽  
Marek S. Rylko ◽  
Robert Stala ◽  
...  
Keyword(s):  
Boost Converter ◽  
Small Signal ◽  
Signal Model ◽  
Two Phase ◽  
Small Signal Model ◽  
And Control

Small-Signal Model of the Two-Phase Interleaved Coupled-Inductor Boost Converter

2018 ◽  
Vol 33 (9) ◽  
pp. 8052-8064 ◽  
Author(s):  
Brendan C. Barry ◽  
John G. Hayes ◽  
Marek S. Rylko ◽  
Robert Stala ◽  
Adam Penczek ◽  
...  
Keyword(s):  
Boost Converter ◽  
Small Signal ◽  
Signal Model ◽  
Two Phase ◽  
Small Signal Model

Small-Signal Model of Switched Inductor Boost Converter

2019 ◽  
Vol 34 (5) ◽  
pp. 4036-4040 ◽  
Author(s):  
Jia Yao ◽  
Kaisheng Zheng ◽  
A. Abramovitz
Keyword(s):  
Boost Converter ◽  
Small Signal ◽  
Signal Model ◽  
Small Signal Model

A Modeling and Analysis of Push-Pull Forward Topology

2010 ◽  
Vol 40-41 ◽  
pp. 293-297
Author(s):  
Dian Li Hou ◽  
Qing Fan Zhang
Keyword(s):  
Averaging Method ◽  
Circuit Model ◽  
Small Signal ◽  
Large Signal ◽  
Signal Model ◽  
Modeling And Analysis ◽  
Leakage Inductance ◽  
Small Signal Model ◽  
Conduction Mode ◽  
Continuous Conduction Mode

By circuit averaging method, a small-signal model is derived from push-pull forward topology which works in Continuous Conduction Mode (CCM). Dynamic large-signal model, DC circuit model and small-signal model are derived. The effect of leakage inductance on push-pull forward topology is analyzed and simulated in detail.

scholarly journals Optimum Design of GA-BF Algorithm Based PID Controller for the Solar System

2017 ◽  
Vol 6 (2) ◽  
pp. 136
Author(s):  
S. Mallika ◽  
R. Saravanakumarf
Keyword(s):  
Pid Controller ◽  
Hybrid Algorithm ◽  
Control Method ◽  
Boost Converter ◽  
Small Signal ◽  
Control Parameters ◽  
Signal Model ◽  
New Approach ◽  
Simulink Model ◽  
Small Signal Model

This paper presents a new approach based on the genetic algorithm (GA) and Bacterial Foraging (BF) is used to perform a constrained tuning technique for the PID parameters to optimize the power output of solar panel. A small-signal model is used to design the controller parameters of the conventional PID controller. The dynamics of the converter is non linear, therefore, it is hard to derive desirable performance. So hybrid algorithm is used to optimize the control parameters of boost converter. In order to obtain the fitness of an individual, Simulink model of the boost converter is designed and the hybrid algorithm is programmed to design the optimal control parameters. It was found that the proposed optimal PID controller parameters adjustment by the GA-BF algorithm is superior to the conventional method. The Matlab/Simulink was used to verify the effectiveness of proposed control method.

Modeling of high-side active clamp forward converter with resistive parasitics

2020 ◽  
Vol 39 (2) ◽  
pp. 413-430
Author(s):  
Krishnaja Maturi ◽  
Susovon Samanta
Keyword(s):  
Transfer Functions ◽  
Canonical Model ◽  
Small Signal ◽  
Signal Model ◽  
Content Type ◽  
Forward Converter ◽  
Small Signal Model ◽  
High Side ◽  
Computer Aided ◽  
Modeling Software

Purpose The purpose of this paper is to derive the small-signal/canonical model derivation of the high-side active clamp forward converter (ACFC) with diode rectification for ideal and with resistive parasitics. It also covers the analysis of ACFC small-signal model with resistive parasitics using computer-aided modeling software Personal Computer Simulation Program with Integrated Circuit Emphasis (PSPICE) 16.6. The effects of variation of system parameters on the ACFC’s state transfer functions and operations have been highlighted in this paper. Design/methodology/approach The large-signal model and small-signal model of the ACFC with diode rectification has been derived using AC small-signal modeling approach. Findings The operating point of the converter changes with the consideration of resistive parasitics compared with the ideal case. The response obtained from the hardware matches with the time domain response of the averaged model and switch model developed in PSPICE. Research limitations/implications This paper limits the study of ACFC small-signal behavior by using computer-aided design software PSPICE. The dead time of the converter is not considered because it is negligible when compared with the on and off time. The leakage inductance which plays a role in zero voltage switching of the ACFC switches is neglected in the analysis as it is very small compared to the magnetizing inductance. The switching losses are not considered in the modeling. Practical implications The mathematical computation of deriving the system transfer functions from canonical model is complex and time consuming. Originality/value The modeling with resistive parasitics improves the effectiveness of the equivalent model. Also, the analysis with computer-aided modeling software PSPICE gives reliable results in less time.

scholarly journals Small-Signal Modeling of Phase-Shifted Full-Bridge Converter Considering the Delay Associated to the Leakage Inductance

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7280
Author(s):  
Diego Ochoa ◽  
Antonio Lázaro ◽  
Pablo Zumel ◽  
Marina Sanz ◽  
Jorge Rodriguez de Frutos ◽  
...  
Keyword(s):  
Voltage Drop ◽  
Power Converter ◽  
Open Loop ◽  
Small Signal ◽  
Random Delay ◽  
Signal Model ◽  
Leakage Inductance ◽  
Small Signal Model ◽  
Natural Response ◽  
Small Signal Modeling

This paper demonstrates that in the Phase-Shifted Full-Bridge (PSFB) buck-derived converter, there is a random delay associated with the blanking time produced by the leakage inductance. This random delay predicts the additional phase drop that is present in the frequency response of the open-loop audio-susceptibility transfer function when the converter shows a significant blanking time. The existing models of the PSFB converter do not contemplate the delay and gain differences associated to voltage drop produced in the leakage inductor of the transformer. The small-signal model proposed in this paper is based on the combination of two types of analysis: the first analysis consists of obtaining a small-signal model using the average modeling technique and the second analysis consists of studying the natural response of the power converter. The dynamic modeling of the Phase-Shifted Full-Bridge converter, including the random delay, has been validated by simulations and experimental test.

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