Anisotropic Electromagnetic Field Numerical Calculation Method And Matlab

In the electromagnetic field applied research domain, a new academic discipline branch-the numerical calculation of the electromagnetic field-is derived from the electromagnetic field theory combined with the new achievements of the numerical calculation method and the computer software technic.The numerical integration method is one of the basic content of calculation method applications, which not only is the base of getting numerical solution of the various types of numerical integral expression, but also the essential part of the various types of numerical methods along with the numerical calculation method development. The numerical integration has provided the most general calculation method and tool for electromagnetic field analysis and calculation. Commonly used numerical integration method are trapezoidal quadrature formula, Simpson quadrature formula, Gaussian quadrature formula and the numerical calculation of elliptic integral and so on.Several commonly used numerical calculation methods were applied to the calculation of electromagnetic field in isotropic magnetic medium in the past. In this paper, I attempt to apply these commonly used numerical calculations methods to the calculations of electromagnetic field in anisotropic magnetic media. And at the first time, I applied the MATALAB software platform make out the generic program for numerical calculations of electromagnetic field in anisotropic media, which makes use of the features of the high speed and accuracy of the computer to increase the calculation speed and accuracy of the electromagnetic field in anisotropic media.In this paper, I attempt to get the magnetic vector potential of circular current in anisotropic media by Simpson quadraturen formula and the numerical calculation of elliptic integral, get the magnetic vector potential of long straight line current in anisotropic media by Simpson quadraturen formula and analysis formula, get the magnetic vector potential of the rectangular long straight line current in anisotropic media by Simpson quadraturen formula and direct integration by field source discretization. Then these types of numerical calculation methods are compared each other.Based on the compared results between the analysis solution and the numerical calculation solution of the magnetic vector potential of a long straight conduct current in anisotropic media, the conclusion is that: the result of the numerical calculation is very close to the result of the analysis solution, which means that the numerical calculation solution can meet the general requirements of electromagnetic field engineering.