A maximum power factor of control algorithms of three-level Vienna Rectifier without current distortion at current zero-crossing point

2016 ◽  
Author(s):  
Fusheng Wang ◽  
Yunliang Teng ◽  
Zhaoshuan Yuan ◽  
Jiayi Xu
Keyword(s):  
Power Factor ◽  
Maximum Power ◽  
Control Algorithms ◽  
Zero Crossing ◽  
Vienna Rectifier ◽  
Maximum Power Factor ◽  
Current Zero ◽  
Crossing Point

Transport Properties Of Doped CsBi4Te6 Thermoelectric Materials

1998 ◽  
Vol 545 ◽  
Author(s):  
Paul W. Brazis ◽  
Melissa Rocci ◽  
Duck-Young Chung ◽  
Mercouri G. Kanatzidis ◽  
Carl R. Kannewurf
Keyword(s):  
Transport Properties ◽  
Power Factor ◽  
Thermoelectric Materials ◽  
Material Characterization ◽  
Doping Concentration ◽  
Maximum Power ◽  
Maximum Value ◽  
Characterization Studies ◽  
Maximum Power Factor ◽  
Optimum Doping Concentration

AbstractIn previous investigations we have introduced a variety of new chalcogenide-based materials with promising properties for thermoelectric applications. The chalcogenide CsBi4Te6 was previously reported to have a high ZT product with a maximum value at 260K. In order to improve this value, a series of doped CsBi4Te6 samples has been synthesized. Current doping studies have been very encouraging, with one sample found to have a maximum power factor of 51.5 μW/cm·K2 at 184 K. This paper reports on material characterization studies through the usual transport measurements to determine optimum doping concentration for various dopants.

Thermoelectric Properties of CoSb3 Nanoparticle Films

2011 ◽  
Vol 347-353 ◽  
pp. 3448-3455
Author(s):  
Ya Jun Yang ◽  
Xian Yun Liu ◽  
Xu Dong Wang ◽  
Mei Ping Jiang ◽  
Xian Feng Chen ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Power Factor ◽  
Room Temperature ◽  
Maximum Power ◽  
Vapor Transport ◽  
Growth Technique ◽  
Highly Efficient ◽  
Nanoparticle Films ◽  
Electrical Conductivities ◽  
Maximum Power Factor

Cobblestone-like CoSb3 nanoparticle films have been achieved via a catalyst-free vapor transport growth technique. The thermoelectric properties of the nanoparticle films were measured from room temperature to around 500 oC. The resultant CoSb3 nanoparticle films show high electrical conductivities due to clean particle surfaces. A maximum power factor reaches 1.848×10−4 W/mK2 at 440 oC. The discussed approach is promising for realizing new types of highly efficient thermoelectric semiconductors.

A Novel Intelligent Load Control Switch Based on Dynamic Compensation Method for Current Zero-Crossing Point

2012 ◽  
Vol 433-440 ◽  
pp. 4717-4724 ◽  
Author(s):  
Gui Lin Zheng ◽  
Zhi Fu Zhang
Keyword(s):  
Load Control ◽  
Electric Load ◽  
Dynamic Compensation ◽  
Zero Crossing ◽  
Term Operation ◽  
Control Switch ◽  
Ac Current ◽  
New Type ◽  
Current Zero ◽  
Crossing Point

A new-type of intelligent electric load control switch composed of three separate magnetic latching relays is presented. A method of AC current and voltage sampling and root mean square (RMS) calculation is employed to ensure reliable operation of the electric load. The method possesses such features as less hardware requirements, good real-time performance, high frequency interference eliminating. Current zero-crossing break is the most outstanding advantage of the switch. In order to guarantee the magnetic latching relay shut off at current zero-crossing point accurately in long term operation, a dynamic compensation for delay time is proposed based on all-around research of the properties of magnetic latching relay actuation time. Finally, an application of the switch in the electric load control system constructed via CAN bus and ZigBee network is well brought forth.

Microwave-assisted synthesis of Bi2Se3ultrathin nanosheets and its electrical conductivities

CrystEngComm ◽  
2014 ◽  
Vol 16 (19) ◽  
pp. 3965-3970 ◽  
Author(s):  
Haiming Xu ◽  
Gang Chen ◽  
Rencheng Jin ◽  
Dahong Chen ◽  
Yu Wang ◽  
...  
Keyword(s):  
Power Factor ◽  
Microwave Power ◽  
Maximum Power ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Electrical Conductivities ◽  
Maximum Power Factor

Ultrathin Bi2Se3nanosheets (30 nm) have been successfully fabricated with 1 kW microwave power for 1 minute. The maximum power factor of the sample can reach up to 157 μW m−1K−2at 523 K, which is larger than the samples with thicknesses ranging from 50 nm to 100 nm.

Electronic structure and electrical transport properties of MoS2 single-walled nanotubes based on first principles

2021 ◽  
Author(s):  
Wen Yang ◽  
Lili Wang ◽  
Yiming Mi ◽  
Guanghong Zhong ◽  
Qiuju Ma ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Transport Properties ◽  
Power Factor ◽  
Electrical Transport ◽  
Maximum Power ◽  
Boltzmann Transport ◽  
Electrical Transport Properties ◽  
Text Type ◽  
Maximum Power Factor ◽  
Transport Method

The work theoretically calculated the electronic structure and electrical transport properties of two configurations of single-walled MoS2 nanotubes: armchair nanotubes (ANTs) and zigzag nanotubes (ZNTs) based on the density functional theory and Boltzmann transport method. ANTs have an indirect one. while ZNTs have a direct bandgap structure. The Seebeck coefficient ([Formula: see text]), electrical conductivity ([Formula: see text] and power factor ([Formula: see text] were calculated as a function of carrier concentration, chemical potential and temperature using the Boltzmann transport method. The calculated power factor ([Formula: see text]) indicates that the most promising electronic properties were exhibited by [Formula: see text]-type ANTs and [Formula: see text]-type ZNTs. The [Formula: see text] of narrow bandgap (6, 6) (7, 7) (8, 8) semiconductors reached [Formula: see text], [Formula: see text] and [Formula: see text]WK[Formula: see text]m[Formula: see text] at room-temperature, respectively. (7, 7) nanotube have a maximum power factor of [Formula: see text]WK[Formula: see text]m[Formula: see text] at 950 K, and the maximum power factor of ANTs is almost twice that of ZNTs.

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