Analysis And Optimization Of Magnetic Coupler's Cooling System

Permanent magnet eddy current transmission device generates eddy current and heat in the course of the work,which will lead to higher conductor plate temperature.It is a great threat for the safety of the mine.Due to the small work gap of main drive plate,the accumulation of heat is transferred to the permanent magnet by heat convection,which results in the demagnetization failure of the permanent magnet at high temperature.In addition to the forced convection,such as wind cooling,water cooling and oil cooling,dissipation fin is the effective radiating way widely used in permanent magnet eddy current transmission device.Ribbed radiator is highly welcomed because of its steady performance,good heat dissipation and low cost.A large number of previous studies mainly focus on the horizontal and forced convection rectangular fin heat sink.However,this paper extends the field and researches in deep,which discusses and analyses cooling performance impact of different curved fin distribution and size in natural convection conditions vertically and evenly in the conductor plate.After ANSYS simulation and analysis,it is finally verified through the experiment.The paper conducts formula derivation and calculation by minimum entropy theory.While the total amount of heat is invariant,considering the molecular activity is a wonderful way from the perspective of the quantity of heat per unit time,namely the least resistance heat conduction effect is best.The paper proposes geometry on the heat sink in the fin height H,distance between the angle of termination point the conductor and heart connection a,terminate the line as the rib arc chord of the central angle beta ?,fin spacing of s before and after the two parallel arc,fin number n as thermal variables,entropying production rate of Q as the target function analysis and design.Experimental parameters are used tocalculate the constant temperature of the copper conductor which is the heat source.Then the powerful calculation function of MATLAB exhaustive calculation is used to calculate the design size of reasonable design size range arc rib corresponding to the best cooling performance of resistance under the condition of the design.Matlab size optimization results for reference is combined with the actual to improve the condition to determine the final design size.Then size of the components is used to build SolidWorks model,and Fluent fluid solid coupling module of finite element simulation conducts verification and analysis of the cooling effect.The arc rib optimal design is under the circumstance of safety work of the highest temperature and permanent magnets.In addition,in the MATLAB analysis,this paper also analyzes and explains the change trend of correlation between the variables and the size of the heat dissipation performance of the actual conditions into account cost,providing a theoretical basis for the size and layout of the arc rib.In Fluent analysis,the paper joins the temperature field analysis,provides the size and layout the location of the basis for setting additional fluid cooling system of auxiliary heat dissipation.Finally,it also verifies the correctness of numerical simulation methods,and relevant experimental scheme is given.The experiment verified the optimal rib parameters meets the cooling requirements,and puts forward to some suggestions on future research work.For the irregular permanent magnet eddy current power transmission device under the condition of heat sink,the minimal heat source is guiding ideology in the research design.MATLAB exhaustive screening,Fluent fluid solid coupling analysis and experimental validation of combining,provides a theoretical basis for the design of auxiliary cooling system,which distributes to the popularization and application of arc heat sink in the mine of permanent magnet eddy current transmission cooling system,and provides the basis of experimental design to ensure the safety and reliability of magnetic soft starting in large power.