| The transverse flux induction heating of the continuous moving aluminum alloy strip,which is the coupling analysis of the three dimensional nonlinear eddy current field including motion parameters and the temperature field,which is also a hot topic in the fields of electrical engineering,material science and engineering and metallurgical engineering.In this paper,a simulation model of transverse flux induction heating device was established.The A-Φ method was used to calculation method of the coupled field in transverse flux induction heating process.In order to improve the efficiency of three dimensional coupled computing,the problem was simplified reasonably,which shortens the coupled computing time of transverse flux induction heating,and the boundary conditions were analyzed.The temperature field equation is established for continuous moving aluminum alloy strip,the finite element calculation of the three-dimensional nonlinear coupling field of the continuous aluminum alloy strip was completed.The eddy current distribution,heat source distribution and final temperature distribution of the aluminum alloy strip surface were given and the results are analyzed.The law of transverse flux induction heating was studied,the computing results show that:①The influence of frequency and current on the temperature distribution of the exit of the aluminum alloy strip was obvious:the effect of current on the strip heating temperature was relatively large;but the effect on the temperature uniformity of the strip was relatively small On the contrary,the influence of frequency on strip temperature was small,which had great influence on the temperature uniformity of the strip.②The air gap had a great effect on the temperature distribution of the exit of the aluminum alloy strip,the temperature of the strip increases with the decrease of the air gap,but it had little effect on strip temperature uniformity;③The velocity of the strip moves had a great effect on the temperature distribution the exit of the aluminum alloy strip.The temperature of the strip decreases with the increase of the moving speed of the strip,and the uniformity of the strip temperature distribution was also affected.The design of flux induction heating coil is studied,the results show that:①The ratio of the length of the coil to the width of the strip had a great influence on the temperature distribution of the edge of the strip,the strip temperature was more uniform as the length of the coil was long;②The number of coil turns had a great influence on the strip temperature,and the higher the number of turns,the higher the strip temperature.The design of flux induction heating yoke was studied.The results show that:①The ratio of the length of the yoke to the width of the strip had a great influence on the temperature distribution of the edge of the strip,the strip temperature was more uniform as the length of the yoke was long;②The number of coil turns had a great influence on the strip temperature,and the higher the number of turns,the higher the strip temperature.The yoke pitch had a great influence on the temperature uniformity of the strip,and the bigger the pitch,the worse the strip temperature uniformity.③The yoke height had no influence on the temperature distribution of aluminum alloy strip.The design of the transverse flux induction heating device was studied.Shielding device was added to transverse f induction heating device,after aluminum alloy strip was induction heated in that device,the edge temperature of aluminum alloy strip significantly reduced.According to the aluminum alloy heated temperature required in this paper,the uniformity of the strip after heating in this device was worse.However,the device can significantly improve the excessively temperature of the edge of the strip when the other materials were heated to a high temperature. |
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