Analysis of coil temperature rise in electromagnetic forming with coupled cooling method

2020 ◽  
Vol 63 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Li Qiu ◽  
Kui Deng ◽  
Yantao Li ◽  
Xi Tian ◽  
Qi Xiong ◽  
...  
Keyword(s):  
Temperature Rise ◽  
Electromagnetic Forming ◽  
Cooling Method ◽  
Coil Temperature

Analysis and reduction of coil temperature rise in electromagnetic forming

2015 ◽  
Vol 225 ◽  
pp. 185-194 ◽  
Author(s):  
Quanliang Cao ◽  
Xiaotao Han ◽  
Zhipeng Lai ◽  
Qi Xiong ◽  
Xiao Zhang ◽  
...  
Keyword(s):  
Temperature Rise ◽  
Electromagnetic Forming ◽  
Coil Temperature

scholarly journals Coil Temperature Rise and Workpiece Forming Efficiency of Electromagnetic Forming Based on Half-Wave Current Method

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 9371-9379 ◽  
Author(s):  
Li Qiu ◽  
Chenglin Wang ◽  
A. Abu-Siada ◽  
Qi Xiong ◽  
Wang Zhang ◽  
...  
Keyword(s):  
Temperature Rise ◽  
Current Method ◽  
Electromagnetic Forming ◽  
Coil Temperature ◽  
Half Wave ◽  
Forming Efficiency

Design of a Giant Magnetostrictive Actuator and Research on the Effect of Water Cooling System

2014 ◽  
Vol 889-890 ◽  
pp. 893-896 ◽  
Author(s):  
Rong Ge Yan ◽  
Li Hua Zhu ◽  
Xiao Xing Dong
Keyword(s):  
Temperature Rise ◽  
Cooling System ◽  
Water Cooling ◽  
Effect Of Water ◽  
Coil Temperature ◽  
Giant Magnetostrictive Materials ◽  
Allowable Range ◽  
Heat Expansion ◽  
Magnetostrictive Actuator ◽  
Water Cooling System

Actuators made of giant magnetostrictive materials (GMM) have good application prospect in the precise driving. Because characteristics of GMM are very sensitive to temperature, the coil thermal effect will cause phenomenon of heat expansion and cold contraction in GMM, which affects the precise displacement output of the actuator. Coil skeleton and water cooling system are installed between the coil and the GMM rod in this design. The effect of water cooling system on the coil temperature rise is experimental studied. It is found that water cooling system can effectively reduce the influence of the coil temperature rise on displacement output of the GMM rod. Water cooling system has greatly improved the coil operating temperature when current is low, while cooling effect is not big for the larger current. That is because the coil heating is strong and the water can not immediately take away the heat. But coil temperature rise is still limited in allowable range. Thus, experiment results show that water cooling system can effectively ensure output precision of the GMM actuator.

scholarly journals Bone drilling with internal gas cooling: Experimental and statistical investigation of the effect of cooling with CO2 on reduction of temperature rise due to drill bit wear

2021 ◽  
Vol 16 (2) ◽  
pp. 199-211
Author(s):  
E. Shakouri ◽  
H. Haghighi Hassanalideh ◽  
S. Fotuhi
Keyword(s):  
Temperature Rise ◽  
Drill Bit ◽  
Bone Drilling ◽  
Thermal Necrosis ◽  
Allowable Limit ◽  
Cooling Method ◽  
Bit Wear ◽  
Gas Cooling ◽  
Drilling Operations ◽  
Drilling Site

Bone drilling is a major stage in immobilization of the fracture site. During bone drilling operations, the temperature may exceed the allowable limit of 47 °C, causing irrecoverable damages of thermal necrosis and seriously threatening the fracture treatment. One of the parameters affecting the temperature rise of the drilling site is the frequency of applying the drill bit and its extent of wear. The present study attempted to mitigate the effect of drill bit wear on the bone temperature rise through the internal gas cooling method via CO2 and to reduce the risk of incidence of thermal necrosis. To this end, drilling tests were conducted at three rotational speeds 1000, 2000, and 3000 r·min-1 in two states of without cooling and with internal gas cooling by CO2 through an internal coolant carbide drill bit, along with six drill bit states (new, used 10, 20, 30, 40, and 50 times) on a bovine femur bone. The results indicated that in the internal gas cooling state, as the number of drill bit applications increased from the new state to more than 50 times, the temperature of the hole site increased on average by ΔT = 2-3 °C (n = 1000 r·min-1), ΔT = 5-8 °C (n = 2000 r·min-1), and ΔT = 5-7 °C (n = 3000 r·min-1). Furthermore, the internal gas cooling method was able to significantly reduce the effect of the drill bit wear on the temperature rise of the drilling site and to resolve the risk of incidence of thermal necrosis regardless of the process parameters for drilling operations.

The Impact of Temperature Rise and Regional Factors on Malaria Risk

2014 ◽  
Vol 34 (1) ◽  
pp. 436-455 ◽  
Author(s):  
채수미 ◽  
YOONSEOKJUN ◽  
신호성 ◽  
김동진
Keyword(s):  
Temperature Rise ◽  
Malaria Risk ◽  
Regional Factors ◽  
The Impact
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