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Medium-Frequency Oscillation in Voltage-Controlled Full-Bridge Inverter with a Nonlinear Inductor SCIE
期刊论文 | 2021 , 14 (13) | ENERGIES
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Abstract :

An inverter, whose inductor current is periodic, is the key equipment for photovoltaic power generation, fuel cell power generation, etc. A nonlinear inductor, whose inductance will be changed by its current, can be used to improve the grid current quality of the inverter, although making the mathematical model of the inverter system more complex. In this paper, the voltage-controlled full-bridge inverter with a nonlinear inductor is investigated and its mathematical model is established. The influence of parameters on the dynamical behaviors of this system is analyzed by using the harmonic balance method and the Floquet theory. Consequently, the mechanism for the occurrence of medium-frequency oscillation is revealed. The hardware circuit for the voltage-controlled full-bridge inverter with a nonlinear inductor is designed and some experimental results are presented for confirmation. The research results show that the mechanism for the occurrence of medium-frequency oscillation is Hopf bifurcation and its oscillation frequency is between the line frequency and the switching frequency.

Keyword :

medium-frequency oscillation mathematical model Hopf bifurcation full-bridge inverter

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GB/T 7714 Wang, Faqiang , Zhou, Hongwei , Zhang, Jiansong et al. Medium-Frequency Oscillation in Voltage-Controlled Full-Bridge Inverter with a Nonlinear Inductor [J]. | ENERGIES , 2021 , 14 (13) .
MLA Wang, Faqiang et al. "Medium-Frequency Oscillation in Voltage-Controlled Full-Bridge Inverter with a Nonlinear Inductor" . | ENERGIES 14 . 13 (2021) .
APA Wang, Faqiang , Zhou, Hongwei , Zhang, Jiansong , Cao, Hongbo . Medium-Frequency Oscillation in Voltage-Controlled Full-Bridge Inverter with a Nonlinear Inductor . | ENERGIES , 2021 , 14 (13) .
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A Multiscroll Chaotic Attractors with Arrangement of Saddle-Shapes and Its Field Programmable Gate Array (FPGA) Implementation EI SCIE Scopus
期刊论文 | 2020 , 2020 | Complexity | IF: 2.833
WoS CC Cited Count: 2 SCOPUS Cited Count: 1
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Abstract :

Based on the step function and signum function, a chaotic system which can generate multiscroll chaotic attractors with arrangement of saddle-shapes is proposed and the stability of its equilibrium points is analyzed. The under mechanism for the generation of multiscroll chaotic attractors and the reason for the arrangement of saddle shapes and being symmetric about y-axis are presented, and the rule for controlling the number of scroll chaotic attractors with saddle shapes is designed. Based on the core chips including Altera Cyclone IV EP4CE10F17C8 Field Programmable Gate Array and Digital to Analog Converter chip AD9767, the peripheral circuit and the Verilog Hardware Description Language program for realization of the proposed multiscroll chaotic system is constructed and some experimental results are presented for confirmation. The research result shows that the occupation of multipliers and Phase-Locked Loops in Field Programmable Gate Array is zero. © 2020 Faqiang Wang and Yufang Xiao.

Keyword :

Chaotic systems Digital to analog conversion Field programmable gate arrays (FPGA) Logic gates Computer hardware description languages

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GB/T 7714 Wang, Faqiang , Xiao, Yufang . A Multiscroll Chaotic Attractors with Arrangement of Saddle-Shapes and Its Field Programmable Gate Array (FPGA) Implementation [J]. | Complexity , 2020 , 2020 .
MLA Wang, Faqiang et al. "A Multiscroll Chaotic Attractors with Arrangement of Saddle-Shapes and Its Field Programmable Gate Array (FPGA) Implementation" . | Complexity 2020 (2020) .
APA Wang, Faqiang , Xiao, Yufang . A Multiscroll Chaotic Attractors with Arrangement of Saddle-Shapes and Its Field Programmable Gate Array (FPGA) Implementation . | Complexity , 2020 , 2020 .
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Multistability and coexisting transient chaos in a simple memcapacitive system EI SCIE CSCD
期刊论文 | 2020 , 29 (5) | Chinese Physics B | IF: 1.494
WoS CC Cited Count: 1
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Abstract :

The self-excited attractors and hidden attractors in a memcapacitive system which has three elements are studied in this paper. The critical parameter of stable and unstable states is calculated by identifying the eigenvalues of Jacobian matrix. Besides, complex dynamical behaviors are investigated in the system, such as coexisting attractors, hidden attractors, coexisting bifurcation modes, intermittent chaos, and multistability. From the theoretical analyses and numerical simulations, it is found that there are four different kinds of transient transition behaviors in the memcapacitive system. Finally, field programmable gate array (FPGA) is used to implement the proposed chaotic system. © 2020 Chinese Physical Society and IOP Publishing Ltd.

Keyword :

Eigenvalues and eigenfunctions Jacobian matrices Field programmable gate arrays (FPGA) Chaotic systems

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GB/T 7714 Wang, Fu-Ping , Wang, Fa-Qiang . Multistability and coexisting transient chaos in a simple memcapacitive system [J]. | Chinese Physics B , 2020 , 29 (5) .
MLA Wang, Fu-Ping et al. "Multistability and coexisting transient chaos in a simple memcapacitive system" . | Chinese Physics B 29 . 5 (2020) .
APA Wang, Fu-Ping , Wang, Fa-Qiang . Multistability and coexisting transient chaos in a simple memcapacitive system . | Chinese Physics B , 2020 , 29 (5) .
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A Novel Multi-Shape Chaotic Attractor and Its FPGA Implementation EI SCIE
期刊论文 | 2019 , 66 (12) , 2062-2066 | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
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Abstract :

This brief introduces a novel multi-shape chaotic system which can generate a 2n+2-scroll chaotic attractor in y-x plane, a 2n+2-star chaotic attractor in z-y plane, a 2n+2flower chaotic attractor in z-x plane and a 2n+2-multiple layer spiral chaotic attractor in z-w plane with the natural number n. Various chaotic attractors are illustrated not only by computer simulation but also by FPGA implementation. This novel multishape chaotic system is suitable for the potential application of secure communication.

Keyword :

FPGA multi-star chaotic attractor Multi-scroll chaotic attractor multi-flower chaotic attractor multi-layer spiral chaotic attractor

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GB/T 7714 Wang, Faqiang , Wang, Riming , Iu, Herbert H. C. et al. A Novel Multi-Shape Chaotic Attractor and Its FPGA Implementation [J]. | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS , 2019 , 66 (12) : 2062-2066 .
MLA Wang, Faqiang et al. "A Novel Multi-Shape Chaotic Attractor and Its FPGA Implementation" . | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS 66 . 12 (2019) : 2062-2066 .
APA Wang, Faqiang , Wang, Riming , Iu, Herbert H. C. , Liu, Chongxin , Fernando, Tyrone . A Novel Multi-Shape Chaotic Attractor and Its FPGA Implementation . | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS , 2019 , 66 (12) , 2062-2066 .
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Design and analysis of new meminductor model based on Knowm memristor EI SCIE Scopus CSCD PKU
期刊论文 | 2019 , 68 (19) | ACTA PHYSICA SINICA
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Abstract :

In the past, the memristor model and its application research have mainly focused on constructing and analyzing the memristor model and its equivalent circuit model based on the basic concept of memristor, while the research based on commercial memristive devices in the market has been rare. According to the theoretical relationship between meminductor and memristor, a new model of meminductor is constructed based on Knowm memristor, the first commercial memristor chip in the world, combined with the second-generation current conveyor and transconductance operational amplifier. By adjusting the frequency and the amplitude of the input voltage and the transconductance gain of the transconductance operational amplifier, the continuous adjustment of the meminductance can be effectively achieved in the circuit. The LTspice circuit model and hardware experimental circuit of the proposed meminductor are designed. The validity of the new meminductor model and the correctness of the design method are verified by LTspice simulations and circuit experiments.

Keyword :

Knowm memristor meminductor transconductance

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GB/T 7714 Zhu Lei-Jie , Wang Fa-Qiang . Design and analysis of new meminductor model based on Knowm memristor [J]. | ACTA PHYSICA SINICA , 2019 , 68 (19) .
MLA Zhu Lei-Jie et al. "Design and analysis of new meminductor model based on Knowm memristor" . | ACTA PHYSICA SINICA 68 . 19 (2019) .
APA Zhu Lei-Jie , Wang Fa-Qiang . Design and analysis of new meminductor model based on Knowm memristor . | ACTA PHYSICA SINICA , 2019 , 68 (19) .
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Simple method for enlarging positive LE and accelerating calculation speed of chaotic system EI SCIE Scopus
期刊论文 | 2019 , 55 (16) , 884-886 | ELECTRONICS LETTERS | IF: 1.316
WoS CC Cited Count: 2 SCOPUS Cited Count: 2
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Abstract :

Positive Lyapunov exponent (LE) is vital to identify a dynamical system being chaotic or hyperchaotic. A simple method that the right-hand side of differential equations which can be used to describe the chaotic system, is multiplied by a constant value, is proposed. From the proposed method, it can not only enlarge the positive LE of chaotic or hyperchaotic systems, but also accelerate their calculation speed. Sprott C chaotic system is selected as an example to show its effectiveness. Finally, an electronic circuit model for Sprott C chaotic system is designed and some experimental results are presented for confirmation.

Keyword :

chaotic system dynamical system Lyapunov methods nonlinear control systems chaotic systems hyperchaotic systems Sprott C chaotic system chaos differential equations accelerating calculation speed positive Lyapunov exponent

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GB/T 7714 Wang, Faqiang . Simple method for enlarging positive LE and accelerating calculation speed of chaotic system [J]. | ELECTRONICS LETTERS , 2019 , 55 (16) : 884-886 .
MLA Wang, Faqiang . "Simple method for enlarging positive LE and accelerating calculation speed of chaotic system" . | ELECTRONICS LETTERS 55 . 16 (2019) : 884-886 .
APA Wang, Faqiang . Simple method for enlarging positive LE and accelerating calculation speed of chaotic system . | ELECTRONICS LETTERS , 2019 , 55 (16) , 884-886 .
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Transient and steady coexisting attractors in a new memristor-based 4-D chaotic circuit EI SCIE Scopus
期刊论文 | 2019 , 108 , 262-274 | AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS | IF: 2.924
WoS CC Cited Count: 9 SCOPUS Cited Count: 9
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Abstract :

In this study, a new current-controlled memristor is proposed and its characteristics are analyzed. Based on this new memristor, a new four-dimensional chaotic circuit is proposed. The complex dynamics of the proposed chaotic circuit are investigated. From the results of the theoretical analysis and the numerical simulations, it is found that the memristor-based chaotic circuit can generate different types of attractors including single-scroll, double-scroll, and periodic attractors for varying circuit parameters. By taking symmetrical initial conditions, symmetric steady coexisting attractors are obtained under the same set of circuit parameters. For certain initial conditions, striking transient coexisting attractors with different timescales can be obtained. In particular, there are two transient changes occurring successively at different time scales respect to the same initial conditions for the proposed chaotic circuit, which is a novel dynamic property. Finally, a practical circuit platform that describes the proposed chaotic circuit on Field Programmable Gate Arrays (FPGA) is designed, and some experimental results are presented for confirmation. (C) 2019 Elsevier GmbH. All rights reserved.

Keyword :

Chaotic circuit FPGA Transient coexisting attractors Memristor-based Steady coexisting attractors

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GB/T 7714 Cao, Hongbo , Wang, Faqiang . Transient and steady coexisting attractors in a new memristor-based 4-D chaotic circuit [J]. | AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS , 2019 , 108 : 262-274 .
MLA Cao, Hongbo et al. "Transient and steady coexisting attractors in a new memristor-based 4-D chaotic circuit" . | AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS 108 (2019) : 262-274 .
APA Cao, Hongbo , Wang, Faqiang . Transient and steady coexisting attractors in a new memristor-based 4-D chaotic circuit . | AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS , 2019 , 108 , 262-274 .
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A novel step-up converter with an ultrahigh voltage conversion ratio EI SCIE Scopus
期刊论文 | 2018 , 11 (10) | Energies | IF: 2.707
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© 2018 by the authors. A new step-up converter with an ultrahigh voltage conversion ratio is proposed in this paper. Two power switches of such a converter, which conduct synchronically, and its output voltage, which has common ground and common polarity with its input voltage, lead to the simple control circuit. No abrupt changes in the capacitor voltage and the inductor current of the proposed step-up converter mean that it does not suffer from infinite capacitor current and inductor voltage. Two input inductors with different values can still allow the proposed step-up converter to work appropriately. An averaged model of the proposed step-up converter was built and one could see that it was still fourth-order even with its five storage elements. Some theoretical derivations, theoretical analysis, Saber simulations, and circuit experiments are provided to validate the effectiveness of the proposed step-up converter.

Keyword :

Average-current mode control New step-up converter Small-signal model Ultrahigh voltage conversion ratio

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GB/T 7714 Wang, Faqiang , Iu, Herbert Ho-Ching , Li, Jing . A novel step-up converter with an ultrahigh voltage conversion ratio [J]. | Energies , 2018 , 11 (10) .
MLA Wang, Faqiang et al. "A novel step-up converter with an ultrahigh voltage conversion ratio" . | Energies 11 . 10 (2018) .
APA Wang, Faqiang , Iu, Herbert Ho-Ching , Li, Jing . A novel step-up converter with an ultrahigh voltage conversion ratio . | Energies , 2018 , 11 (10) .
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High Step-up Voltage Gain AC-DC Rectifier Based on Transformerless Switched-Inductor Converter for Power Factor Correction CPCI-S
会议论文 | 2018 , 2132-2136 | 13th IEEE Conference on Industrial Electronics and Applications (ICIEA)
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Abstract :

In this paper, a high step-up voltage gain AC-DC power-factor-correction (PFC) rectifier based on a transformerless switched-inductor converter is proposed for universal input applications. The proposed PFC converter features a very simple circuit structure, and it is designed to operate in discontinuous conduction mode (DCM) with nature current-shaping ability, alleviated revise recovery current of diodes and a simple voltage control. A high output voltage is provided without operating at an extremely high duty ratio. In addition, the voltage stresses of power switches are lower than the output voltage, contributing to low cost and low loss of power switches. Finally, steady-state theoretical derivations are presented. Simulated results are provided to validate the effectiveness of this proposed PFC converter.

Keyword :

High step-up voltage gain power factor correction (PFC) AC-DC rectifier Switched-inductor converter

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GB/T 7714 Lin, Xiang , Wang, Faqiang . High Step-up Voltage Gain AC-DC Rectifier Based on Transformerless Switched-Inductor Converter for Power Factor Correction [C] . 2018 : 2132-2136 .
MLA Lin, Xiang et al. "High Step-up Voltage Gain AC-DC Rectifier Based on Transformerless Switched-Inductor Converter for Power Factor Correction" . (2018) : 2132-2136 .
APA Lin, Xiang , Wang, Faqiang . High Step-up Voltage Gain AC-DC Rectifier Based on Transformerless Switched-Inductor Converter for Power Factor Correction . (2018) : 2132-2136 .
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A novel multi-scroll chaotic generator: Analysis, simulation, and implementation EI SCIE CSCD Scopus
期刊论文 | 2018 , 27 (1) | CHINESE PHYSICS B | IF: 1.469
WoS CC Cited Count: 12 SCOPUS Cited Count: 13
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Abstract :

Based on a new three-dimensional autonomous linear system and designing a specific form of saturated function series and a sign function with two variables of system, which are employed to increase saddle-focus equilibrium points with index 2, a novel multi-scroll chaotic system is proposed and its typical dynamical characteristics including bifurcation diagram, Poincare map, and the stability of equilibrium points are analyzed. The hardware circuit is designed and the experimental results are presented for confirmation.

Keyword :

hardware circuit linear system multi-scroll chaotic system

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GB/T 7714 Zhang, Gui-Tao , Wang, Fa-Qiang . A novel multi-scroll chaotic generator: Analysis, simulation, and implementation [J]. | CHINESE PHYSICS B , 2018 , 27 (1) .
MLA Zhang, Gui-Tao et al. "A novel multi-scroll chaotic generator: Analysis, simulation, and implementation" . | CHINESE PHYSICS B 27 . 1 (2018) .
APA Zhang, Gui-Tao , Wang, Fa-Qiang . A novel multi-scroll chaotic generator: Analysis, simulation, and implementation . | CHINESE PHYSICS B , 2018 , 27 (1) .
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