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Design of CMOS class-E power amplifier for low power applications
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作者 袁成 李智群 +1 位作者 刘继华 王志功 《Journal of Southeast University(English Edition)》 EI CAS 2009年第2期180-184,共5页
A fully integrated class-E power amplifier(PA) at 2.4 GHz implemented in a 0. 18 μm 6-metal-layer mixed/RF CMOS ( complementary metal-oxide-semiconductor transistor ) technology is presented. A two-stage amplific... A fully integrated class-E power amplifier(PA) at 2.4 GHz implemented in a 0. 18 μm 6-metal-layer mixed/RF CMOS ( complementary metal-oxide-semiconductor transistor ) technology is presented. A two-stage amplification structure is chosen for this PA. The driving stage produces a high swing switch signal by using resonation technology. The output stage is designed as a class-E topology to realize the power amplification. Under a 1.2 V power supply, the PA delivers a maximum output power of 8. 8 dBm with a power-added efficiency (PAE) of 44%. A new power control method for the class-E power amplifier is described. By changing the amplitude and duty cycle of the signal which enters the class-E switch transistor, the output power can be covered from - 3 to 8. 8 dBm through a three-bit control word. The proposed PA can be used in low power applications, such as wireless sensor networks and biotelemetry systems. 展开更多
关键词 class-E power amplifier complementary metal-oxidesemiconductor transistor(CMOS) technology low power application
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MOCVD growth of AlGaInP/GaInP quantum well laser diode with asymmetric cladding structure for high power applications 被引量:2
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作者 李沛旭 王翎 +5 位作者 李树强 夏伟 张新 汤庆敏 任忠祥 徐现刚 《Chinese Optics Letters》 SCIE EI CAS CSCD 2009年第6期489-491,共3页
In order to improve the characteristics of the general broad-waveguide 808-nm semiconductor laser diode (LD), we design a new type quantum well LD with an asymmetric cladding structure. The structure is grown by met... In order to improve the characteristics of the general broad-waveguide 808-nm semiconductor laser diode (LD), we design a new type quantum well LD with an asymmetric cladding structure. The structure is grown by metal organic chemical vapor deposition (MOCVD). For the devices with 100-ttm-wide stripe and 1000-/zm-long cavity under continuous-wave (CW) operation condition, the typical threshold current is 190 mA, the slope efficiency is 1.31 W/A, the wall-plug efficiency reaches 63%, and the maximum output power reaches higher than 7 W. And the internal absorption value decreases to 1.5 cm^-1. 展开更多
关键词 MOCVD growth of AlGaInP/GaInP quantum well laser diode with asymmetric cladding structure for high power applications well high
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Computer Technology Application in Power Plant Engineering 被引量:2
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《Electricity》 1999年第1期52-54,共3页
关键词 Computer Technology application in power Plant Engineering
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Application of Soft Power Strategy on Asian Civilization Spaces
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作者 Gulnara Karimova 《Contemporary International Relations》 2009年第6期13-27,共15页
While increasing contact between peoples and cultures,globalization does not weaken the diversity of world's civilizations.Soft power can serve as a lubricant to prevent the clash of civilizations and enhance dial... While increasing contact between peoples and cultures,globalization does not weaken the diversity of world's civilizations.Soft power can serve as a lubricant to prevent the clash of civilizations and enhance dialogues between civilizations.The article summarizes the three components of China's soft power:cultural promoting,foreign assistance and the thought of"a harmonious world."Taking Uzbekistan as an example,the author also illustrates the path of the Islamic nations to implement"soft power"strategy. 展开更多
关键词 ASIA application of Soft power Strategy on Asian Civilization Spaces
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Build Information Intranet Foster Information Resources ─put forward in the Fifth Electric Power Computer Application and Information Working Conference
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《Electricity》 1997年第2期52-52,共1页
关键词 Intranet Build Information Intranet Foster Information Resources put forward in the Fifth Electric power Computer application and Information Working Conference
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New LNK302 Addresses Lower Power Home Appliance and Industrial Applications
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《电源技术应用》 2004年第10期621-621,共1页
SAN JOSE,Calif.-September 9,2004-Power Integrations,Inc.(NASDAQ:POWI),the leading supplier of high-voltageanalog integrated circuits used in power conversion, todayintroduced LNK302,a new member of the company'sLi... SAN JOSE,Calif.-September 9,2004-Power Integrations,Inc.(NASDAQ:POWI),the leading supplier of high-voltageanalog integrated circuits used in power conversion, todayintroduced LNK302,a new member of the company'sLinkSwitch-TN family of AC- DC power conversion ICs.Designed as a cost-effective replacement for bulky,energy-wasting capacitive droppers and linear transformers,the LinkSwitch-TN family is ideal for use in home applianceand industrial control applications.The addition of 展开更多
关键词 HOME NASDAQ New LNK302 Addresses Lower power Home Appliance and Industrial applications TN AC high
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REMOTE SENSING APPLICATION RESEARCH OF WATER POWER AT THE INITIAL EXPLOITING STAGE IN THE LOWER REACHES OF YALONG RIVER
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作者 Lin Hengzhang, Xu Gengqin (Institute of Remote Sensing Appilcations, Academia Sinica) He Jianbang (National Lab of Resources and Environment Information System) 《遥感信息》 CSCD 1990年第A02期21-22,共2页
There are abundant water power resources in the Yalong River which are suitable for the large hydroelectric engineering. But a reliability study should be made for the valley which liable to frequent earthquakes. The ... There are abundant water power resources in the Yalong River which are suitable for the large hydroelectric engineering. But a reliability study should be made for the valley which liable to frequent earthquakes. The color infrared aerophotos, multi-spectral photography and thermal infrared scanning had been specially done besides MSS image, processing. Researches on remote sensing applications to engineering geology, hydrogeology, deformation of neo-tectonics, Iandslide, mud-rock flow, ecological environment and geographical information system had been carried out by more than 20 research units. 展开更多
关键词 REMOTE SENSING application RESEARCH OF WATER power AT THE INITIAL EXPLOITING STAGE IN THE LOWER REACHES OF YALONG RIVER AT
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Application of Reliability Management in Electric Power Industry
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作者 Huang Youru(China Electric Reliability Management Center) 《Electricity》 1999年第2期8-15,共8页
关键词 application of Reliability Management in Electric power Industry
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Thermal management by manipulating electromagnetic parameters
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作者 王云 梁迪飞 +1 位作者 韩天成 邓龙江 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第5期21-27,共7页
Electromagnetic absorbing materials may convert electromagnetic energy into heat energy and dissipate it.However,in a high-power electromagnetic radiation environment,the temperature of the absorbing material rises si... Electromagnetic absorbing materials may convert electromagnetic energy into heat energy and dissipate it.However,in a high-power electromagnetic radiation environment,the temperature of the absorbing material rises significantly and even burns.It becomes critical to ensure electromagnetic absorption performance while minimizing temperature rise.Here,we systematically study the coupling mechanism between the electromagnetic field and the temperature field when the absorbing material is irradiated by electromagnetic waves.We find out the influence of the constitutive parameters of the absorbing materials(including uniform and non-uniform)on the temperature distribution.Finally,through a smart design,we achieve better absorption and lower temperature simultaneously.The accuracy of the model is affirmed as simulation results aligned with theoretical analysis.This work provides a new avenue to control the temperature distribution of absorbing materials. 展开更多
关键词 multi-physics field electromagnetic-thermal coupling microwave absorption high power application
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Next Generation Narrowband(Under 500 kHz) Power Line Communications(PLC) Standards 被引量:5
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作者 Stefano Galli Thierry Lys 《China Communications》 SCIE CSCD 2015年第3期1-8,共8页
In the past decade,several efforts around the world were started with the goal of introducing "smart metering" capabilities into the power grid.These efforts have spurred renewed interest in the design of ne... In the past decade,several efforts around the world were started with the goal of introducing "smart metering" capabilities into the power grid.These efforts have spurred renewed interest in the design of next generation Narrowband Power Line Communications(NB-PLC) transceivers.In the past few years,ITU-T and IEEE have standardized a family of next generation OFDM-based NB-PLC transceivers some of which are today being considered for massive deployments in Europe and Asia.This paper addresses the important role that PLC has not only for smart metering but also for many other Smart Grid applications,and also gives an overview of the main differences between these next generation NB-PLC standards. 展开更多
关键词 power line communications standard smart grid applications
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Role of PV-Powered Vehicles in Low-Carbon Society and Some Approaches of High-Efficiency Solar Cell Modules for Cars 被引量:1
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作者 Masafumi Yamaguchi Taizo Masuda +11 位作者 Kenji Araki Daisuke Sato Kan-Hua Lee Nobuaki Kojima Tatsuya Takamoto Kenichi Okumura Akinori Satou Kazumi Yamada Takashi Nakado Yusuke Zushi Mitsuhiro Yamazaki Hiroyuki Yamada 《Energy and Power Engineering》 2020年第6期375-395,共21页
Development of highly-efficient photovoltaic (PV) modules and expanding its application fields are significant for the further development of PV technologies and realization of innovative green energy infrastructure b... Development of highly-efficient photovoltaic (PV) modules and expanding its application fields are significant for the further development of PV technologies and realization of innovative green energy infrastructure based on PV. Especially, development of solar-powered vehicles as a new application is highly desired and very important for this end. This paper presents the impact of PV cell/module conversion efficiency on reduction in CO</span><sub><span style="font-family:Verdana;">2</span></sub><span style="font-family:Verdana;"> emission and increase in driving range of the electric based vehicles. Our studies show that the utilization of a highly-efficient (higher than 30%) PV module enables the solar-powered vehicle to drive 30 km/day without charging in the case of light weig</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">h</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">t cars with elec</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">t</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">ric mileage of 17</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">km/kWh under solar irrad</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">i</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">a</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">t</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">ion of 3.7</span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">kWh/m</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;">/day, which means that the majority of the family cars in Japan can run only by the sunlight without supplying fossil fuels. Thus, it is essential to develop high-efficiency as well as low-cost solar cells and modules for automotive applications. The analytical results developed by the authors for conversion efficiency potential of various solar cells for choosing candidates of the PV modules for automotive applications are shown. Then we overview the conversion efficiency potential and recent progress of various Si tandem solar cells, such as III-V/Si, II-VI/Si, chalcopyrite/Si, and perovskite/Si tandem solar cells. The III-V/Si tandem solar cells are expected to have a high potential for various applications because of its high conversion efficiency of larger than 36% for dual-junction and 42% for triple-junction solar cells under 1-sun AM1.5 G illumination, lightweight and low-cost potentials. The analysis show</span></span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">s</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> that III-V based multi-junction and Si based tandem solar cells are considered to be promising candidates for the automotive application. Finally, we report recent results for our 28.2% efficiency and Sharp’s 33% mechanically stacked InGaP/GaAs/Si triple-junction solar cell. In addition, new approaches which </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">are</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> suitable for automotive applications by using III-V triple-junction, and static low concentrator PV modules are also presented. 展开更多
关键词 Solar Cell powered Vehicle applications High-Efficiency Solar Cells Multi-Junction Solar Cells Tandem Solar Cells MODULES
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Recent Developments of Modulation and Control for High-Power Current-Source-Converters Fed Electric Machine Systems 被引量:3
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作者 Pengcheng Liu Zheng Wang +2 位作者 Sanmin Wei Yuwen Bo Shaoning Pu 《CES Transactions on Electrical Machines and Systems》 CSCD 2020年第3期215-226,共12页
The pulse-width-modulated(PWM)current-source converters(CSCs)fed electric machine systems can be considered as a type of high reliability energy conversion systems,since they work with the long-life DC-link inductor a... The pulse-width-modulated(PWM)current-source converters(CSCs)fed electric machine systems can be considered as a type of high reliability energy conversion systems,since they work with the long-life DC-link inductor and offer high fault-tolerant capability for short-circuit faults.Besides,they provide motor friendly waveforms and four-quadrant operation ability.Therefore,they are suitable for high-power applications of fans,pumps,compressors and wind power generation.The purpose of this paper is to comprehensively review recent developments of key technologies on modulation and control of high-power(HP)PWM-CSC fed electric machines systems,including reduction of low-order current harmonics,suppression of inductor–capacitor(LC)resonance,mitigation of common-mode voltage(CMV)and control of modular PWM-CSC fed systems.In particular,recent work on the overlapping effects during commutation,LC resonance suppression under fault-tolerant operation and collaboration of modular PMW-CSCs are described.Both theoretical analysis and some results in simulations and experiments are presented.Finally,a brief discussion regarding the future trend of the HP CSC fed electric machines systems is presented. 展开更多
关键词 Current source converter(CSC) high power(HP)applications electric machine system inductor–capacitor(LC)resonance low-order current harmonics common-mode voltage(CMV) MODULATION control
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Distributed Solar PV System for Industrial Application
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作者 Po-Chien Hsu Wei-Jen Chen Bin-Juine Huang 《Journal of Energy and Power Engineering》 2017年第2期78-84,共7页
The paper presents the design and field test of a distributed solar PV system for industrial application (DGPVi). DGPVi utilizes HyPV (hybrid PV) system which generates solar power for self-consumption in lighting... The paper presents the design and field test of a distributed solar PV system for industrial application (DGPVi). DGPVi utilizes HyPV (hybrid PV) system which generates solar power for self-consumption in lighting and air conditioning in a production line of a factory when solar energy is available. It does not feed the excess PV power to the grid. HyPV will be switched to grid power supply when solar energy is not available. A 3 kWp DGPVi is installed in a factory for field demonstration. The test results show that the solar PV power generated can be utilized immediately. The solar energy generation efficiency (kWh/day per kWp PV installation) of DGPVi is close to that of grid-tied PV system without self-consumption and battery storage. The yearly return on investment of DGPVi is 2.0% at the present installation cost or 3.3% at further cost-down cost. The payback time will be 14.3 years at the present installation cost or 12.1 years at cost-down cost. The present study verifies the economic feasibility of DGPVi. 展开更多
关键词 Solar PV power solar power generation solar power for industrial application solar PV for self-consumption.
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Recent Requirements and Future Development of Integrated EMS/DTS System in China 被引量:1
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作者 张伯明 孙宏斌 吴文传 《Electricity》 2001年第2期20-24,共5页
Resent status for dispatch automation systems in China is introduced and the requirement for integrated EMS/DTS is discussed. The advantages of the integration of EMS/DTS are analyzed. Large benefit can be obtained to... Resent status for dispatch automation systems in China is introduced and the requirement for integrated EMS/DTS is discussed. The advantages of the integration of EMS/DTS are analyzed. Large benefit can be obtained to develop an integrated EMS/DTS system. EMS/DTS functions for district power system application are investigated and introduced. An application of the LINUX based EMS/DTS to Yulin power system is reported and is used to show the advantage of an open system. Future development of integrated EMS/DTS systems in China is discussed. 展开更多
关键词 EMS/DTS integrated system district power system LINUX application
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Guest Editorial:Special Section on Applications of Power Electronics in Power Systems
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作者 Antonio GóMEZ-EXPóSITO Xinbo RUAN 《Journal of Modern Power Systems and Clean Energy》 SCIE EI 2017年第4期495-498,共4页
Power transformers and steam turbines were the key drivers in the development of the AC power system paradigm at the dawn of the 20 th century, characterized by huge synchronous generators feeding millions of passive ... Power transformers and steam turbines were the key drivers in the development of the AC power system paradigm at the dawn of the 20 th century, characterized by huge synchronous generators feeding millions of passive loads through large interconnected systems, all of them supervised and controlled from a centralized energy management system(EMS). In the same way, thyristor valves and IGBTs, introduced 展开更多
关键词 Guest Editorial:Special Section on applications of power Electronics in power Systems SECTION
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Application of piezoelectric transient response in transducer acoustic power measurement
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作者 ZENG Miao SHEN Yong +2 位作者 LI Fu YANG Zengtao WANG Hua 《Chinese Journal of Acoustics》 CSCD 2017年第1期18-28,共11页
To explore a more convenient method for measuring the focused ultrasound power, a piezoelectric ceramic plate was used to receive ultrasonic signal directly. Due to an acoustic force acts on the surface of piezoelectr... To explore a more convenient method for measuring the focused ultrasound power, a piezoelectric ceramic plate was used to receive ultrasonic signal directly. Due to an acoustic force acts on the surface of piezoelectric ceramic plate, the piezoelectric response was obtained by means of electromechanical analogy, which was composed of voltage response caused by forced vibration and high frequency attenuation response caused by natural vibration. The conversion relationship between output signal of piezoelectric ceramic plate and acoustic power of transducer was analyzed. The envelope of output piezoelectric signal was extracted in twice, and a voltage amplitude curve with sinusoidal distribution that could describe the changes of acoustic power was obtained. Under different drive voltage of transducer, the maximum peak voltage of envelope curve was found respectively. Their squared values were made a linear fitting with acoustic power measured by acoustic power meter, and then the proportional coefficient of theoretical relational expression was calibrated. The experimental results are in good agreement with the theory. The relative error between calibrated theoretical acoustic power and that measured by acoustic power meter was less than 8.7%. The paper can provide a guideline for measuring acoustic power of transducer by using piezoelectric signal. 展开更多
关键词 application of piezoelectric transient response in transducer acoustic power measurement
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CNFET-based voltage rectifier circuit for biomedical implantable applications
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作者 Yonggen Tu Libo Qian Yinshui Xia 《Journal of Semiconductors》 EI CAS CSCD 2017年第2期89-95,共7页
Carbon nanotube field effect transistor(CNFET) shows lower threshold voltage and smaller leakage current in comparison to its CMOS counterpart. In this paper, two kinds of CNFET-based rectifiers, full-wave rectifier... Carbon nanotube field effect transistor(CNFET) shows lower threshold voltage and smaller leakage current in comparison to its CMOS counterpart. In this paper, two kinds of CNFET-based rectifiers, full-wave rectifiers and voltage doubler rectifiers are presented for biomedical implantable applications. Based on the standard 32 nm CNFET model, the electrical performance of CNFET rectifiers is analyzed and compared. Simulation results show the voltage conversion efficiency(VCE) and power conversion efficiency(PCE) achieve 70.82% and 72.49% for CNFET full-wave rectifiers and 56.60% and 61.17% for CNFET voltage double rectifiers at typical 1.0 V input voltage excitation, which are higher than that of CMOS design. Moreover, considering the controllable property of CNFET threshold voltage, the effect of various design parameters on the electrical performance is investigated.It is observed that the VCE and PCE of CNFET rectifier increase with increasing CNT diameter and number of tubes. The proposed results would provide some guidelines for design and optimization of CNFET-based rectifier circuits. 展开更多
关键词 CNFET technology rectifier power conversion efficiency biomedical implantable applications
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