Induction heating magnetic thermal coupling field improved calculation method based on finite formula method

The invention relates to an induction heating magnetic thermal coupling field improved calculation method based on a finite formula method. A periodic transient magnetic field is calculated before each temperature field time step length, and when the magnetic field is calculated, the conductivity of each position of the temperature distribution conversion component under the previous time step length is calculated; the eddy current loss obtained by calculation of the magnetic field is taken as a heat source for calculation of a next time step length temperature field, and the heat conductivitycoefficient and the specific heat capacity of each position of the temperature distribution conversion component under the previous time step length are calculated when the temperature field is calculated; influences of temperature distribution characteristics on conductivity, heat conductivity coefficient and specific heat capacity are considered in calculation, and eddy current loss obtained through calculation of a tr