Propellant Thermal Management Effect on Neutral Residence Time in Low-Voltage Hall Thrusters

2013 ◽  
Vol 29 (3) ◽  
pp. 528-539 ◽  
Author(s):  
Rafael A. Martinez ◽  
Mitchell L. R. Walker
Keyword(s):  
Thermal Management ◽  
Residence Time ◽  
Low Voltage ◽  
Hall Thrusters ◽  
Management Effect

scholarly journals Gallium-Nitride Semiconductor Technology and Its Practical Design Challenges in Power Electronics Applications: An Overview

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2663 ◽  
Author(s):  
Mauricio Dalla Vecchia ◽  
Simon Ravyts ◽  
Giel Van den Broeck ◽  
Johan Driesen
Keyword(s):  
Gallium Nitride ◽  
Power Electronics ◽  
Thermal Management ◽  
Low Voltage ◽  
Experimental Testing ◽  
Design Procedure ◽  
Switching Frequency ◽  
Passive Component ◽  
Advantages And Disadvantages ◽  
Design Challenges

This paper will revise, experimentally investigate, and discuss the main application challenges related to gallium nitride power semiconductors in switch-mode power converters. Gallium Nitride (GaN) devices are inherently gaining space in the market. Due to its high switching speed and operational switching frequency, challenges related to the circuit design procedure, passive component selection, thermal management, and experimental testing are currently faced by power electronics engineers. Therefore, the focus of this paper is on low-voltage (<650 V) devices that are used to assemble DC-DC and/or DC-AC converters to, for instance, interconnect PV generation systems in the DC and/or AC grids. The current subjects will be discussed herein: GaN device structure, the advantages and disadvantages of each lateral gallium nitride technology available, design challenges related to electrical layout and thermal management, overvoltages and its implications in the driver signal, and finally, a comprehensive comparison between GaN and Si technology considering the main parameters to increase the converters efficiency.

Improved thermal management of low voltage power devices with optimized bond wire positions

2011 ◽  
Vol 51 (9-11) ◽  
pp. 1913-1918 ◽  
Author(s):  
Helmut Köck ◽  
Christian Djelassi ◽  
Stefano de Filippis ◽  
Robert Illing ◽  
Michael Nelhiebel ◽  
...  
Keyword(s):  
Thermal Management ◽  
Low Voltage ◽  
Power Devices ◽  
Bond Wire

scholarly journals Silver coated textile for versatile personal thermal management via multi-order reflections

2021 ◽  
Author(s):  
Xiaoyu Xie ◽  
Yang Liu ◽  
Zhao Xu ◽  
Dengteng Ge ◽  
Lili Yang
Keyword(s):  
Thermal Management ◽  
Low Voltage ◽  
Skin Surface ◽  
Silver Coating ◽  
Skin Surface Temperature ◽  
Infrared Transmittance ◽  
Coated Fabric ◽  
Reducing Energy ◽  
Order Reflection ◽  
Indoor And Outdoor

Abstract Personal thermal management (PTM) is of paramount importance for reducing energy consumption and improving the thermal comfort of individuals. However, wearable textile via facile methods for indoor/outdoor PTM is still challenging. Here we present a novel simple yet effective method for versatile PTM via silver coated textile. Infrared transmittance of coated fabric is greatly enhanced by 150% due to the multi-order reflection of silver coating. Based on their IR radiative cooling, in indoor and outdoor, the skin surface temperature is lower by 1.1˚C and 0.9˚C than normal cloth, allowing the textile to be used in multiple environments. Moreover, the coated fabric is capable of active warming up under low voltage, which can be used in low-temperature conditions. These promising results exemplify the practicability of using silver coated textile as a personal thermal management cloth in versatile environments.

LOW VOLTAGE POWER ELECTRONICS

1995 ◽  
Vol 05 (04) ◽  
pp. 575-588 ◽  
Author(s):  
J. A. COBOS ◽  
O. GARCÍA ◽  
J. SEBASTIÁN ◽  
J. UCEDA
Keyword(s):  
Power Systems ◽  
Power Electronics ◽  
Thermal Management ◽  
Power Factor ◽  
Communication Systems ◽  
Output Voltage ◽  
Low Voltage ◽  
Supply Voltage ◽  
The Other ◽  
Battery Life

This paper summarizes some of the current solutions to fulfil the requirements of the new low voltage power systems. On one hand, microelectronics evolution demands lower supply voltage. On the other hand, the portability of the new communication systems demands lighter and smaller power electronics. The improvement of the performance of low power and low output voltage converters is carried out in this paper. Topics like power density, efficiency, thermal management, battery life, hard and soft switching, magnetics integration, synchronous rectification and power factor correction affect each other in these kinds of converters. Although all the relations among the previous terms are difficult to assess, this paper reviews some aspects of the current situation.

scholarly journals Enhanced IR Radiative Cooling of Silver Coated PA Textile

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 147
Author(s):  
Xiaoyu Xie ◽  
Yang Liu ◽  
Ying Zhu ◽  
Zhao Xu ◽  
Yanping Liu ◽  
...  
Keyword(s):  
Thermal Management ◽  
Low Voltage ◽  
Skin Surface ◽  
Radiative Cooling ◽  
Silver Coating ◽  
Skin Surface Temperature ◽  
Infrared Transmittance ◽  
Smart Textile ◽  
Coated Fabric ◽  
Reducing Energy

Smart textile with IR radiative cooling is of paramount importance for reducing energy consumption and improving the thermal comfort of individuals. However, wearable textile via facile methods for indoor/outdoor thermal management is still challenging. Here we present a novel simple, yet effective method for versatile thermal management via silver-coated polyamide (PA) textile. Infrared transmittance of coated fabric is greatly enhanced by 150% due to the multi-order reflection of silver coating. Based on their IR radiative cooling, indoors and outdoors, the skin surface temperature is lower by 1.1 and 0.9 °C than normal PA cloth, allowing the textile to be used in multiple environments. Moreover, the coated fabric is capable of active warming up under low voltage, which can be used in low-temperature conditions. These promising results exemplify the practicability of using silver-coated textile as a personal thermal management cloth in versatile environments.

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