High-performance n-type thermoelectric composites of acridones with tethered tertiary amines and carbon nanotubes

2018 ◽  
Vol 6 (41) ◽  
pp. 20161-20169 ◽  
Author(s):  
Chunmei Gao ◽  
Yijia Liu ◽  
Yuan Gao ◽  
Yan Zhou ◽  
Xiaoyan Zhou ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Power Factor ◽  
Tertiary Amine ◽  
High Power ◽  
High Performance ◽  
Tertiary Amines ◽  
High Power Factor ◽  
Amine Groups ◽  
Acridone Derivatives

Acridone derivatives with different terminal tertiary amine groups were first developed as good n-type thermoelectric composites, and a high power factor of 289.4 μW m−1 K−2 at 430 K was achieved.

scholarly journals Ternary selenides A2Sb4Se8 (A = K, Rb and Cs) as an n-type thermoelectric material with high power factor and low lattice thermal conductivity: importance of the conformationally flexible Sb–Se–Se–Sb bridges

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14415-14421
Author(s):  
Changhoon Lee ◽  
Sujee Kim ◽  
Won-Joon Son ◽  
Ji-Hoon Shim ◽  
Myung-Hwan Whangbo
Keyword(s):  
Thermal Conductivity ◽  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Power Factor ◽  
High Power ◽  
High Performance ◽  
Lattice Thermal Conductivity ◽  
High Power Factor

The ternary selenides A2Sb4Se8 (A = K, Rb, Cs) are predicted to be a high-performance n-type thermoelectric material, and the conformationally-flexible Sb–Se(2)–Se(2)–Sb bridges are crucial in determining the thermoelectric properties of A2Sb4Se8.

scholarly journals Development of a high performance batteries charger with low THD, high power factor, and high efficiency

DYNA ◽  
2018 ◽  
Vol 85 (205) ◽  
pp. 76-82
Author(s):  
Johan Sebastian Sanchez-Choachi ◽  
Miguel Ángel Dávila ◽  
Cesar Leonardo Trujillo
Keyword(s):  
Power Factor ◽  
High Power ◽  
High Performance ◽  
High Efficiency ◽  
High Power Factor

Este articulo presenta el diseño, simulación e implementación de un cargador off-board de baterías de mediana y baja capacidad que incorpora un corrector de factor de potencia, alcanza una baja distorsión armónica (THD) en corriente y permite la implementación de tres diferentes estrategias de carga. Este cargador está compuesto de una etapa de aislamiento galvánico, seguida por un puente rectificador el cual es conectado a un convertidor Boost quien regula el factor de potencia y el THD. Por otro lado, un convertidor Buck es conectado a la salida del convertidor Boost, actuando como una fuente de corriente o tensión, dependiendo de la estrategia de carga que se implemente. Posteriormente, se presentan los resultados haciendo énfasis en el valor de 0.978 para el factor de potencia y el de 5.7% para el THD, el cual es comparado con el estándar IEC 61000-3-2. Finalmente, se evalúa la eficiencia del prototipo encontrando un valor máximo de 91.1% y luego se presentan las conclusiones.

Tailoring the framework of organic small molecule semiconductors towards high-performance thermoelectric composites via conglutinated carbon nanotube webs

2018 ◽  
Vol 6 (18) ◽  
pp. 8323-8330 ◽  
Author(s):  
Xiaojun Yin ◽  
Yuhao Peng ◽  
Jiajia Luo ◽  
Xiaoyan Zhou ◽  
Chunmei Gao ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Small Molecules ◽  
Small Molecule ◽  
Power Factor ◽  
High Power ◽  
High Performance ◽  
High Power Factor ◽  
P Type

Regulating the structure of p-type organic small molecules to generate thermoelectric composites for achieving a high power factor of 113.2 μW m−1 K−2.

High Power Factor Based Novel Design of Sodium Lamps

2010 ◽  
Vol 4 (2) ◽  
pp. 1-6
Author(s):  
S. Sankar ◽  
◽  
G. Gokula Krishnan ◽  
Keyword(s):  
Power Factor ◽  
High Power ◽  
High Power Factor ◽  
Novel Design

scholarly journals A Novel Single-Switch Single-Stage LED Driver with Power Factor Correction and Current Balancing Capability

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1340
Author(s):  
Yih-Her Yan ◽  
Hung-Liang Cheng ◽  
Chun-An Cheng ◽  
Yong-Nong Chang ◽  
Zong-Xun Wu
Keyword(s):  
Power Factor ◽  
High Power ◽  
Pulse Width Modulation ◽  
Power Factor Correction ◽  
Harmonic Distortion ◽  
Boost Converter ◽  
Single Stage ◽  
Led Driver ◽  
Flyback Converter ◽  
High Power Factor

A novel single-switch single-stage high power factor LED driver is proposed by integrating a flyback converter, a buck–boost converter and a current balance circuit. Only an active switch and a corresponding control circuit are used. The LED power can be adjusted by the control scheme of pulse–width modulation (PWM). The flyback converter performs the function of power factor correction (PFC), which is operated at discontinuous-current mode (DCM) to achieve unity power factor and low total current harmonic distortion (THDi). The buck–boost converter regulates the dc-link voltage to obtain smooth dc voltage for the LED. The current–balance circuit applies the principle of ampere-second balance of capacitors to obtain equal current in each LED string. The steady-state analyses for different operation modes is provided, and the mathematical equations for designing component parameters are conducted. Finally, a 90-W prototype circuit with three LED strings was built and tested. Experimental results show that the current in each LED string is indeed consistent. High power factor and low THDi can be achieved. LED power is regulated from 100% to 25% rated power. Satisfactory performance has proved the feasibility of this circuit.

Voltage-sharing converter to supply single-phase asymmetrical four-level diode-clamped inverter with high power factor loads

2010 ◽  
Vol 25 (10) ◽  
pp. 2507-2520 ◽  
Author(s):  
Arash A. Boora ◽  
Alireza Nami ◽  
Firuz Zare ◽  
Arindam Ghosh ◽  
Frede Blaabjerg
Keyword(s):  
Power Factor ◽  
High Power ◽  
Single Phase ◽  
High Power Factor
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