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.

АЛГОРИТМ АВТОМАТИЧЕСКОГО ПОСТРОЕНИЯ МАЛОСИГНАЛЬНОЙ МОДЕЛИ GAAS PHEMT- ТРАНЗИСТОРА И ЕГО РЕАЛИЗАЦИЯ В САПР

2020 ◽  
Vol 96 (3s) ◽  
pp. 330-336
Author(s):  
А.А. Калентьев ◽  
А.А. Попов ◽  
Д.В. Билевич ◽  
И.М. Добуш ◽  
А.Е. Горяинов ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Small Signal ◽  
Signal Modeling ◽  
Design Environment ◽  
Signal Model ◽  
Microwave Transistor ◽  
Small Signal Model ◽  
Transistor Model ◽  
Small Signal Modeling ◽  
Good Agreement

Показаны результаты разработки алгоритма построения малосигнальной модели GaAs pHEMT-транзистора. Алгоритм реализован в виде плагина для САПР СВЧ-устройств NI AWR Design Environment. Алгоритм представляет собой комбинацию различных методик построения малосигнальных моделей. Он позволяет получить модели СВЧ-транзисторов в автоматическом режиме непосредственно в САПР. Экспериментальные исследования показали хорошее совпадение модели, полученной прямой экстракцией, с результатами измерений. The paper highlights the results of developing a GaAs pHEMT small-signal modeling algorithm. The algorithm has been implemented in the microwave EDA NI AWR Design Environment. The algorithm is a combination of the different techniques for small-signal model extraction. It allows automatically getting the microwave transistor model directly in the EDA. Experimental studies have shown a good agreement between directly extracted model and measurements results.

scholarly journals Verification of a control systems design for a series resonant converter based on a small-signal model

2021 ◽  
Author(s):  
Jermaine Stern
Keyword(s):  
Control System ◽  
Systems Design ◽  
Small Signal ◽  
Resonant Converter ◽  
Signal Model ◽  
System A ◽  
Small Signal Model ◽  
Series Resonant ◽  
Control Systems Design ◽  
Reference Input

The project verifies the performance of a control system designed for a Series Resonant Converter (SRC). A discrete small-signal model of an SRC was derived and used to design the control system. An accurate control system was designed in the frequency domain to eliminate the need for trail-and-error [sic] methods or other time domain methods. A PSPICE simulation of a regulated SRC circuit was used to test the control system. A prototype of the regulated SRC was developed to verify the simulated results. The tests performed demonstrated that the control system design provides a quick response. The tests determined that when a step input is applied to the reference input the control system adjusts the SRC's output voltage to the new reference input value. Also, the control system is able to regulate output load voltage in the presence of sudden load changes.

Small- and large-signal modeling of InP HBTs in transferred-substrate technology

2014 ◽  
Vol 6 (3-4) ◽  
pp. 243-251 ◽  
Author(s):  
Tom K. Johansen ◽  
Matthias Rudolph ◽  
Thomas Jensen ◽  
Tomas Kraemer ◽  
Nils Weimann ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Parameter Extraction ◽  
Small Signal ◽  
Current Crowding ◽  
Signal Modeling ◽  
Large Signal ◽  
Signal Model ◽  
Small Signal Model ◽  
Starting Point ◽  
Equivalent Circuit Parameters

In this paper, the small- and large-signal modeling of InP heterojunction bipolar transistors (HBTs) in transferred substrate (TS) technology is investigated. The small-signal equivalent circuit parameters for TS-HBTs in two-terminal and three-terminal configurations are determined by employing a direct parameter extraction methodology dedicated to III–V based HBTs. It is shown that the modeling of measured S-parameters can be improved in the millimeter-wave frequency range by augmenting the small-signal model with a description of AC current crowding. The extracted elements of the small-signal model structure are employed as a starting point for the extraction of a large-signal model. The developed large-signal model for the TS-HBTs accurately predicts the DC over temperature and small-signal performance over bias as well as the large-signal performance at millimeter-wave frequencies.

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.

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