检索结果-内蒙古大学图书馆

IEEE Workshop on Control and Modeling for Power Electronics

作者： Bar Halivni Michael Evzelman Mor Mordechai Peretz The Center for Power Electronics and Mixed-Signal IC Department of Electrical and Computer Engineering Ben-Gurion University of the Negev Beer-Sheva 8410501 Israel

ISBN: (纸本)9781538655429

This paper presents a hardware efficient realization of a low power grid-tied power supply. The SMPS is enabled through flyback configuration accompanied by simple control circuitry for voltage-dependent constant on-time, which have been designed to maximize power density. It also includes start and power up circuits to enable operation from 85Vac to 120Vac. The design is entirely based on off-the-shelf components and customized magnetic element and results in a well-regulated 3V output voltage from 110Vac, with peak efficiency of 84%, and volume of 1 cm~3. The very high power density ( 3kW/Liter, 50W/cui) is enabled by an optimization process for characterizing the magnetic element, mode of operation and values of key components to facilitate a ratio of I_(avg)/I_(rms) close to unity throughout the range of the input voltage. Experimental results validate the optimization method, and verify the operation of the control and power up circuits.

关键词： Logic gates Oscillators Capacitors Power supplies Voltage control Resistors Blanking Electric Power Source Blanking Resistor Device Component Voltage regulation Logic gates Electric circuits Oscillators Capacitors Energy sources magnetic elements High density Optimization Procedure Surgery optimization method AND GATE

来源：评论

学校读者我要写书评

暂无评论

An intra-body communication research platform based on virtual instrument 13

An intra-body communication research platform based on virtu...

引用

13th IEEE International Conference on Electronic Measurement and Instruments, ICEMI 2017

作者： Lin, Shi Gao, Yueming Zhang, Hengfei Željka, Lučev Vasić Vai, Mang-I Du, Min Cifrek, Mario Pun, Sio-Hang College of Physics and Information Engineering Fuzhou University Fuzhou350116 China Key Lab of Medical Instrumentation and Pharmaceutical Technology of Fujian Province Fuzhou350116 China Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia State Key Laboratory of Analog and Mixed Signal VLSI University of Macau 999078 China Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau 999078 China Key Lab of Eco-industrial Green Technology of Fujian Province Nanping China

ISBN: (纸本)9781509050345

An intra-body communication (IBC) research platform based on virtual instrument was established for the hardware design of IBC transceiver. Firstly, the feasibility of constructing IBC research platform using optic-coupling circuit was verified via comparison of three kinds of measurement methods based on virtual instrument. Then, ASK, FSK and BPSK modulation-demodulation were realized via LabVIEW programming, and user interface of the platform was also designed. The platform could achieve signal transmission or recover under different coupling type, different channel distance and different modulation-demodulation method, etc., by means of dynamic adjusting of platform parameters. Experiment results of capacitive-coupling under the platform indicated the authenticity and feasibility of signal transmission. Finally, a full-floating IBC transceiver was designed aided by the parameters provided by the research platform under the scene of capacitive-coupling, FSK modulation and 180 cm channel distance. Moreover, Bit Error Rate (BER) of the transceiver was less than 1e-5, which meant that it is effective and convenient for the design of IBC transceiver aided by virtual instrument platform. © 2017 IEEE.

关键词： User interfaces

来源：评论

学校读者我要写书评

暂无评论

An intra-body communication research platform based on virtual instrument

An intra-body communication research platform based on virtu...

引用

2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)

作者： Lin Shi Gao Yueming Zhang Hengfei Lu?ev Vasi? ?eljka Vai Mang-I Du Min Cifrek Mario Pun Sio-Hang College of Physics and Information Engineering Fuzhou University Key Lab of Medical Instrumentation & Pharmaceutical Technology of Fujian Province Faculty of Electrical Engineering and Computing University of Zagreb State Key Laboratory of Analog and Mixed Signal VLSI University of Macau Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau Key Lab of Eco-industrial Green Technology of Fujian Province

An intra-body communication(IBC) research platform based on virtual instrument was established for the hardware design of IBC transceiver. Firstly, the feasibility of constructing IBC research platform using optic-coupling circuit was verified via comparison of three kinds of measurement methods based on virtual instrument. Then, ASK, FSK and BPSK modulation-demodulation were realized via Lab VIEW programming, and user interface of the platform was also designed. The platform could achieve signal transmission or recover under different coupling type, different channel distance and different modulation-demodulation method, etc., by means of dynamic adjusting of platform parameters. Experiment results of capacitive-coupling under the platform indicated the authenticity and feasibility of signal transmission. Finally, a full-floating IBC transceiver was designed aided by the parameters provided by the research platform under the scene of capacitive-coupling, FSK modulation and 180 cm channel distance. Moreover, Bit Error Rate(BER) of the transceiver was less than 1 e-5, which meant that it is effective and convenient for the design of IBC transceiver aided by virtual instrument platform.

关键词： Intra-body Communication(IBC) virtual instrument transceiver modulation-demodulation

来源：评论

学校读者我要写书评

暂无评论

A 24GHz Digitally Controlled Oscillator for automotive radar in 65nm CMOS

A 24GHz Digitally Controlled Oscillator for automotive radar...

引用

International Symposium on Circuits and Systems

作者： I.Y. Taha M. Mirhassani Analog and Mixed Signal Research Group Department of Electrical and Computer Engineering University of Windsor Windsor Ontario

ISBN: (纸本)9781479953424

This paper presents a CMOS 24GHz Clapp-Colpitts Digitally Controlled Oscillator (CC-DCO) with 22GHz-29GHz tuning range that is able to address Short Range Radar (SRR) requirements. In order to overcome the major challenge to design a wide tuning range DCO, proper oscillator topology is chosen, specific tuning mechanism is implemented, and design optimization strategies are employed without degrading the Phase Noise (PN) performance. The CC-DCO is implemented with 65nm CMOS process. A wide tuning range of 29% and a fine tuning step of 1.6 MHz are achieved simultaneously. The CC-DCO consumes 10mA from a 1V supply. It shows a PN of -187dBc/Hz at 1 MHz offset frequency, and achieves -268dBc/Hz figure of merit considering the tuning range.

关键词： Tuning Oscillators Capacitors CMOS integrated circuits Automotive engineering Mathematical model Radar Oscillators automotive engineering radar CMOS integrated circuits tuning Capacitors road vehicle radar tuning range Mathematical Model digitally offset frequency

来源：评论

学校读者我要写书评

暂无评论

An intra-body communication research platform based on virtual instrument

An intra-body communication research platform based on virtu...

引用

International Conference on Electronic Measurement and Instruments, ICEMI

作者： Lin Shi Gao Yueming Zhang Hengfei Lucev Vasic Zeljka Vai Mang-I Du Min Cifrek Mario Pun Sio-Hang College of Physics and Information Engineering Fuzhou University Fuzhou China Key Lab of Medical Instrumentation & Pharmaceutical Technology of Fujian Province Fuzhou China Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia Department of Electrical and Computer Engineering University of Macau Macau China Key Lab of Eco-industrial Green Technology of Fujian Province Nanping China State Key Laboratory of Analog and Mixed Signal VLSI University of Macau Macau China

关键词： Instruments Transceivers Couplings Frequency shift keying Receivers Baseband

来源：评论

学校读者我要写书评

暂无评论

A high-efficiency self-oscillating class-d amplifier for piezoelectric speakers

引用

IEEE Transactions on Power Electronics 2015年第9期30卷 5125-5135页

作者： Colli-Menchi, Adrian I. Sanchez-Sinencio, Edgar Analog and Mixed-Signal Center Department of Electrical and Computer Engineering Texas A and M University College StationTX United States

The design tradeoffs of the class-D amplifier (CDA) for driving piezoelectric (PZ) speakers are presented, including efficiency, linearity, and electromagnetic interference. An implementation is proposed to achieve high efficiency in the CDA architecture for PZ speakers to extend battery life in mobile devices. A self-oscillating closed-loop architecture is used to obviate the need for a carrier signal generator to achieve low power consumption. The use of stacked-cascode CMOS transistors at the H-bridge output stage provides low-input capacitance to allow high-switching frequency to improve linearity with high efficiency. Moreover, the CDA monolithic implementation achieves 18 $V-{\rm PP}$ output voltage swing in a low-voltage CMOS technology without requiring expensive high-voltage semiconductor devices. The prototype experimental results achieved a minimum THD $+$ N of 0.025%, and a maximum efficiency of 96%. Compared to available CDA for PZ speakers, the proposed CDA achieved higher linearity, lower power consumption, and higher efficiency. © 1986-2012 IEEE.

关键词： Closed loop systems

来源：评论

学校读者我要写书评

暂无评论

Analytical model with lateral force for conventional CMUT membranes under large deflection using Von Kármán equations

Analytical model with lateral force for conventional CMUT me...

引用

IEEE Symposium (IUS) Ultrasonics

作者： Jiujiang Wang Yuanyu Yu Sio Hang Pun Peng Un Mak U Kin Che Ching-Hsiang Cheng Mang I Vai Department of Electrical and Computer Engineering University of Macau Macau State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hong Kong

ISBN: (纸本)9781467398985

Capacitive Micromachined Ultrasonic Transducer (CMUT) is a new type of ultrasound wave generator and detector. Analytical method is intuitive to understand the mechanism and physical effects through modeling of CMUT. To optimize the design procedures of CMUT membrane undergoing large deflection, a new analytical model with the consideration of the lateral force using Von Kármán equations is proposed. This model is capable of calculating the membrane profile of the CMUT since it includes the effect of the lateral force. The calculated results match well with the simulated results and the maximum deflection error in the center of the CMUT is less than 1% of the simulation results. The lateral force increases with the deflection of the membrane and it can be found that with the introduction of the lateral force, the proposed model can accurately estimate the membrane large defection profile in both single and double-layer membrane cases. The capacitance of the CMUT can be derived when the deflection profile of the membrane is available.

关键词： Mathematical model Force Electrodes Analytical models Finite element analysis Micromechanical devices Computational modeling

来源：评论

学校读者我要写书评

暂无评论

An accurate design to calculate and measure the capacitance of CMUT for pressure sensors

An accurate design to calculate and measure the capacitance ...

引用

IEEE ICCE-China Workshop (ICCE-China)

作者： Jiujiang Wang Yuanyu Yu Sio Hang Pun Yueming Gao U Kin Che Peng Un Mak Department of Electrical and Computer Engineering University of Macau Macau State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau Key Lab of Medical Instrumentation & Pharmaceutical Technology of Fujian Province Fuzhou China

ISBN: (纸本)9781509061945

Capacitive Micromachined Ultrasonic Transducer (CMUT) is a type of micro-electro-mechanical system (MEMS) device which has the advantages such as ease of integration with front-end electronics and fabrication of uniform device arrays. The structure and fundamental working principle of a CMUT are similar to that of a parallel plate capacitor. When working in conventional mode, the deflection profiles can be described by analytical expressions and the capacitance can be calculated thereafter. A design was proposed to calculate the deflection profiles of the CMUT membrane accurately and eliminate the parasitic capacitance of the CMUT device. By appropriately selecting the dimensions of the device, the CMUT can be used as a pressure sensor.

关键词： Capacitance Capacitance measurement Pressure measurement Electrodes Pressure sensors Substrates Fabrication

来源：评论

学校读者我要写书评

暂无评论

Analysis, design and implementation of a quasi-proportional-resonant controller for multifunctional capacitive-coupling grid-connected inverter 7

Analysis, design and implementation of a quasi-proportional-...

引用

7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015

作者： Ye, Tao Dai, Ningyi Lam, Chi-Seng Wong, Man-Chung Guerrero, Josep M. Electrical and Computer Engineering Department University of Macau China State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau China Department of Energy Technology Aalborg University Denmark

ISBN: (纸本)9781467371506

The capacitive-coupling grid-connected inverter (CGCI) is able to achieve reactive power compensation and active power transfer simultaneously with a low operational voltage. The CGCI is coupled to the point of common coupling (PCC) via a second-order LC circuit, which makes its modeling and current control characteristics differs from the conventional inductive-coupling grid-connected inverter. The direct current tracking with hysteresis pulse width modulation (PWM) was used in previous studies. However, this method suffers from widely varying switching frequency and large current ripples. A Quasi-proportional-resonant (Quasi-PR) current controller is designed for the CGCI in this paper. Its modeling and parameter selection are studied in detail. In contrast with proportional-integration (PI) current controller, the Quasi-PR controller reduces steady-state error. It also generates a voltage reference for applying the carrier-based PWM to improve output waveform quality. Simulation results are provided to verify the Quasi-PR controller and comparison with the PI controller is also done. A lab-scale prototype is built. Experimental results are given to show the validity of the proposed control method and its design. © 2015 IEEE.

关键词： Controllers

来源：评论

学校读者我要写书评

暂无评论

Closed-Loop design and Time-Optimal Control for a Series-Capacitor Buck Converter

Closed-Loop Design and Time-Optimal Control for a Series-Cap...

引用

Annual IEEE Applied Power Electronics Conference and Exposition

作者： Timur Vekslender Ofer Ezra Yevgeny Bezdenezhnykh Mor Mordechai Peretz The Center for Power Electronics and Mixed-Signal IC Department of Electrical and Computer Engineering Ben-Gurion University of the Negev P.O. Box 653 Beer-Sheva 8410501 Israel

ISBN: (纸本)9781467395519

This paper explores the large-signal and small-signal dynamics of a series-capacitor (SC) buck-type converter and introduces an optimal closed-loop control scheme to accommodate both the steady-state and transient modes. As opposed to a conventional buck converter, where time-optimal control is realized by a single on-off cycle, in the SC-buck topology there is a need to distribute the switching phases to satisfy the charge-balance of the flying capacitor. The new control method hybrids a voltage-mode small-signal controller for steady-state operation and a non-linear, state-plane based transient-mode control scheme for load transients. A detailed principle of operation of the SC-buck converter is provided and explained through an average behavioral model and state-plane analysis. The operation of the controller is experimentally verified on a 12W 12V-to-1.5V converter, demonstrating voltage-mode control operation as well as time-optimal response for load transients.

关键词： Time-optimal control state-space control dc-dc converters voltage regulation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：