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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 863-873页

作者： Guanwei Zeng Chengxi Liu Minfang Liao Yongjian Luo Xuzhu Dong Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network the School of Electrical Engineering and Automation Wuhan University

We propose an optimal stochastic scheduling strategy for a multi-vector energy complex(MEC), considering a fullblown model of the power-to-biomethane(Pt M) process. Unlike conventional optimization that uses a simple efficiency coefficient to coarsely model energy conversion between electricity and biomethane, a detailed Pt M model is introduced to emphasize the reactor kinetics and chemical equilibria of methanation. This model crystallizes the interactions between the Pt M process and MEC flexibility, allowing to adjust the operating condition of the methanation reactor for optimal MEC operation in stochastic scenarios. Temperature optimization and flowsheet design of the Pt M process increase the average selectivity of methane(i.e., ratio between net biomethane production and hydrogen consumption) up to 83.7% in the proposed synthesis flowsheet. Simulation results can provide information and predictions to operators about the optimal operating conditions of a Pt M unit while improving the MEC flexibility.

关键词： Biological system modeling Hydrogen Resistance heating Stochastic processes Production Methane inductors

An Improved Modulation Strategy for Single-phase Three-level Neutral-point-clamped Converter in Critical Conduction Mode

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 981-990页

作者： Ning Li Yujie Cao Xiaokang Liu Yan Zhang Ruotong Wang Lin Jiang Xiao-Ping Zhang School of Electrical Engineering Xi'an University of Technology the Department of Electronics Information and Bioengineering Xi'an Jiaotong University the Department of Electrical Engineering and Electronics University of Liverpool the Department of Electronic Electrical and Systems Engineering University of Birmingham

Two-level totem-pole power factor correction(PFC) converters in critical conduction mode(CRM) suffer from the wide regulation range of switching frequency. Besides, in highfrequency applications, the number of switching times increases, resulting in significant switching losses. To solve these issues, this paper proposes an improved modulation strategy for the single-phase three-level neutral-point-clamped(NPC) converter in CRM with PFC. By optimizing the discharging strategy and switching state sequence, the switching frequency and its variation range have been efficiently reduced. The detailed performance analysis is also presented regarding the switching frequency, the average switching times, and the effect of voltage gain. A 2 k W prototype is built to verify the effectiveness of the proposed modulation strategy and analysis results. Compared with the totem-pole PFC converter, the switching frequency regulation range of the three-level PFC converter is reduced by 36.48% and the average switching times is reduced by 45.10%. The experimental result also shows a 1.2% higher efficiency for the three-level PFC converter in the full load range.

关键词： Switches Switching frequency Control systems Topology Bridge circuits inductors Customer relationship management

A 65 nm CMOS high efficiency 50 GHz VCO with regard to the coupling effect of inductors

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Journal of Semiconductors 2013年第7期34卷 123-127页

作者：叶禹田彤 Key Laboratory of Terahertz Solid-State Technology Shanghai Institute of Micro-system and Information TechnologyChinese Academy of Sciences University of Chinese Academy of Sciences Internet of Things System Technology Laboratory Shanghai Institute of Micro-system and Information TechnologyChinese Academy of Sciences

A 50 GHz cross-coupled voltage controlled oscillator（VCO） considering the coupling effect of inductors based on a 65 nm standard complementary metal oxide semiconductor（CMOS） technology is reported.A pair of inductors has been fabricated,measured and analyzed to characterize the coupling effects of adjacent inductors. The results are then implemented to accurately evaluate the VCO＇s LC tank.By optimizing the tank voltage swing and the buffer＇s operation region,the VCO achieves a maximum efficiency of 11.4%by generating an average output power of 2.5 dBm while only consuming 19.7 mW（including buffers）.The VCO exhibits a phase noise of-87 dBc/Hz at 1 MHz offset,leading to a figure of merit（FoM） of-167.5 dB/Hz and a tuning range of 3.8%（from 48.98 to 50.88 GHz）.

关键词： CMOS coupling effects inductors LC tank VCO

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Design and analysis of quantized controllable doped left-handed materials

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The Journal of China Universities of Posts and Telecommunications 2011年第3期18卷 99-104页

作者： LIU Wen ZHANG Hong-xin WANG Hong LU Ying-hua CHEN Nan MEN Shuo School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 China Beijing National Railway Research and Design Institute of Signal and Communication Beijing 100073 China College of Electronic Information and Automation Chongqing University of Technology Chongqing 400054 China

Two kinds of controllable doped left-handed materials （DLHMs） were designed by inserting inductors and capacitors into the traditional left-handed material （LHM） as heterogeneous elements respectively, which are DLHM with inductors （LDLHM） and DLHM with capacitors （CDLHM）. The characteristics of transmission spectrum were studied by using finite-difference time-domain method （FDTD）. Compared with the traditional LHM, the resonance strength of the LDLHM is weakened and the pass-band is narrowed, but with the increase of the value of the inserted inductors, the bandwidth is expanded. As capacitors inserted into the LHM, the pass-band of the CDLHM is expanded, but the pass-band is shifted to low frequency and the bandwidth is narrowed with the increase of the value of the capacitors, meanwhile, a new generated pass-band is also shifted to low frequency. Therefore, a quantized controllable doped left-handed material can be achieved.

关键词： electromagnetics left-handed material pass-band capacitors inductors

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Adaptive Iterative Learning Control Based on Unfalsified Strategy for Chylla-Haase Reactor

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IEEE/CAA Journal of Automatica Sinica 2014年第4期1卷 347-360页

作者： Jing Wang Yue Wang Liulin Cao Qibing Jin the College of Information Science and Technology Beijing University of Chemical Technology

An adaptive iterative learning control based on unfalsified strategy is proposed to solve high precision temperature tracking of the Chylla-Haase reactor, in which iterative learning is the main control method and the unfalsified strategy is adapted to adjust the learning rate adaptively. It is encouraged that the unfalsified control strategy is extended from time domain to iterative domain, and the basic definition and mathematics description of unfalsified control in iterative domain are given.The proposed algorithm is a kind of data-driven method, which does not need an accurate system model. Process data are used to construct fictitious reference signal and switch function in order to handle different process conditions. In addition, the plant data are also used to build the iterative learning control law. Here the learning rate in a different error level is adjusted to ensure the convergent speed and stability, rather than keeping constant in traditional iterative learning control. Furthermore,two important problems in iterative learning control, i.e., the initial control law and convergence analysis, are discussed in detail. The initial input of first iteration is arranged according to a mechanism model, which can assure a good produce quality in the first iteration and a fast convergence speed of tracking error. The convergence condition is given which is obviously relaxed compared with the tradition iterative learning control.Simulation results show that the proposed control algorithm is effective for the Chylla-Haase problem with good performance in both convergent speed and stability.

关键词： inductors Polymers Heat transfer Cooling Process control Mathematical model Learning (artificial intelligence) Iterative methods Temperature measurement

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On-Chip Boost DC-DC Converter in Color OLED Driver & Controller ICs for Mobile Application

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On-Chip Boost DC-DC Converter in Color OLED Driver & Control...

2005 6th International Conference on ASIC

作者： Ding Ge Zhiliang Chen Institute of Microelectronics Tsinghua University

ISBN: (纸本)0780392108;9780780392106;0780392108;9780780392106

On-chip boost DC-DC converter used in color OLED driver & controller ICs for mobile application is presented in this paper.For special systematic requirement,current-limited pulse-frequency modulation (PFM) control scheme is used.This converter is designed with 0.35um 1P4M high-voltage CMOS process. Experimental results show that,the converter can operate with supply voltage from 2.5 to 4.2V,which is suitable for single-cell lithium-ion rechargeable battery supply application,and boost voltage up to 12～18V for illumining OLED display pixels.The output ripple voltage is about 250mV with 6.8μF off-chip capacitor and 10μH off-chip inductor.The power efficiency is over 75%for 100mA load current,maximum to 87%at about 200mA load current.

关键词： DC-DC power converters Organic light emitting diodes Voltage Pulse modulation Control systems CMOS process Batteries Flat panel displays Capacitors inductors

Mitigating Time Interval Error (TIE) in High-Speed Baseband Digital Transports: Design for Delay Compensation at Baseband Infrastructure of Smart-Phones Using Fractal Dispersive Delay-Lines

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Circuits and Systems 2014年第5期5卷 115-123页

作者： Perambur S. Neelakanta Aziz U. Noori Department of Computer and Electrical Engineering and Computer Science Florida Atlantic University Boca Raton USA

A major concern in modern smart-phones and hand-held devices is a way of mitigating the time interval error (TIE) perceived at high-speed digital transits along the traces of the circuit-board (rigid and or flexible) used in baseband infrastructures. Indicated here is a way of adopting a planar fractal inductor configuration to improvise the necessary time-delay in the transits of digital signal phase jitter and reduce the TIE. This paper addresses systematic design considerations on fractal inductor geometry commensurate with practical aspects of its implementation as delaylines in the high-speed digital transports at the baseband operations of smart-phone infrastructures. Experimental results obtained from a test module are presented to illustrate the efficacy of the design and acceptable delay performance of the test structure commensurate with the digital transports of interest.

关键词： Time-Interval Error Smart-Phones Fractal inductors Delay-Lines Insert

SIMULATION AND DESIGN OF 3D GEOMETRIC RF IC inductors BY NOVEL MODELING TECNIQUES WITH MAGPEEC PLUS FASTCAP

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SIMULATION AND DESIGN OF 3D GEOMETRIC RF IC INDUCTORS BY NOV...

2004 3rd International Conference on Computational Electromagnetics and Its Applications

作者： Zhenghe Feng Haibo Long State Key Lab on Microwave and Digital Communications Dept.EETsinghua University

ISBN: (纸本)0780385624

＜正＞This paper presents a new peec-based inductor simulation tool,entitled L-Simulator,which employs a novel magPEEC modeling algorithm and an existing FastCap modeling algorithm to address both magnetic and electrical coupling effects respectively in 3D conductor + magnet + dielectric geometries,hence being capable to simulate and design 3D magnetic-enhanced RF IC inductors.Applications on micromachmed inductors in 0.2u.m GaAs HEMT process and magnetic-cored micro inductors in 0.18μm CMOS technology are discussed.

关键词： inductors computational electromagnetics circuit CAD integrated circuit design integrated circuit modelling radiofrequency integrated circuits magnetic devices equivalent circuits HEMT integrated circuits CMOS integrated circuits EM simulation CAD tool partial element equivalent circuit method magnetic-enhanced inductor structures 3D geometric RFIC inductors magPEEC FastCap magnetic coupling effects electrical coupling effects conductor/magnet/dielectric geometries micromachined inductors GaAs HEMT process CMOS technology magnetic-cored micro inductors 0.2 micron 0.18 micron GaAs

Design and Simulation of On-chip RF Magnetic Medium inductors

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Design and Simulation of On-chip RF Magnetic Medium Inductor...

2006 8th International Conference on Solid-State and Integrated Circuit Technology

作者： Chen Yang Fan Zhang Feng Liu Li-Tian Liu Tian-Ling Ren Albert Wang Institute of Microelectronics Tsinghua University

ISBN: (纸本)1424401607

＜正＞On-chip RF magnetic medium inductor is one of the most promising solutions for the lacking of miniature high-quality inductors in RF IC.However,few theoretical and experimental results on magnetic inductors have been reported.In this paper,integrated mag-medium inductors are designed;high-resistivity magnetic material is used to achieve the mag-mediumfully -filled structure and closed magnetic circuit. Influences of structure and material parameters on inductor performance are firstly simulated and analyzed. Results give plentiful design instructions for the real achievement of small-size and high-performance on-chip magnetic inductors.

关键词： inductors Radio frequency integrated circuits magnetic media closed magnetic circuit system-on-chip simulating small size material parameter radiofrequency

Design of High Efficiency Buck-Boost Controller IC

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Design of High Efficiency Buck-Boost Controller IC

2008 9th International Conference on Solid-State and Integrated-Circuit Technology

作者： Lou Jiana1 Zhao Menglian1 Wu Xiaobo1 Yan Xiaolang1 1 Institute of VLSI Design Zhejiang University Hangzhou 310027 P. R. China Institute of VLSI Design Zhejiang University

In order to increase the efficiency of portable devices powered by Lithium-Ion battery, a high efficiency multi-mode buck-boost controller IC is proposed in this paper. By applying a cascade buck-boost prototype, it not only realizes seamless transition between step up and down functions, but also achieves high efficiency over the entire load range by introducing BURST mode operation. System design and modeling have achieved and the simulation results were consistent with expectations well.

关键词： [IEEE Keyword]Control systems Discharges Load modeling inductors Simulation Switches Converters