Study on Temperature Distribution and Heat Dissipation Characteristics of Stator of the Linear Motor in Vacuum Tube
In order to study the temperature distribution and heat dissipation characteristics of stator of the linear motor in vacuum tube,this paper established a three-dimensional numerical calculation model of stator temperature distribution of linear motor,and simulated the temperature field changes of stator in the energizing and heat dissipation stages by Fluent software.The influence of different tube pressures(0.005,0.01,0.02,0.05,0.1 atm)on the natural convection heat transfer performance of coil surface was studied,and the relative strength of natural convection heat transfer and radiation heat transfer was analyzed.The results show that the temperature rise of the stator caused by a single train operation is small,the maximum temperature of the coil is 14.6℃,and the temperature rise is only 0.55℃ after two hours of heat dissipation.More than 95%of the heat generated by the energized coil is transmitted to the iron core and bracket through heat conduction,while the heat transferred by convection and radiation is very small,and the pressure of the tube has a great effect on the natural convection heat exchange on the coil surface.The radiation heat transfer on the coil surface is greater than the natural convection heat transfer.The research results provide a theoretical basis for the research of temperature rise characteristics and heat dissipation methods of stator of the linear motor in vacuum tube.
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