Maxwell Eddy Current Non-Linear Surface Impedance Boundary Condition

- November 24, 2022 at 9:13 pm
  
  turow
  Subscriber
  
  Hi,
  
  What algorithm or method is used in Ansys Maxwell Eddy Current Solver for the NON-LINEAR Surface Impedance boundary condition case ?
  
  a) effective non-linear magnetic curve (energy/coenergy)
  b) iterative Newton-Raphson μn = ∂B/∂H = μ(H) + H ∂μ(H)/∂H non-linear permeability inside maxwell eqs
  c) simple approximation like Agarwal’s theory with a rectangular BH-curve
  d) ?????????
- November 29, 2022 at 4:45 pm
  
  HDLI
  Ansys Employee
  
  Hello turow,
        I am not sure where is the statement is from and meaning of "non-linear", but I suppose it may be for using non-linear permeability for this impedance boundary.
        I believe you are looking for the impedance boundary. Please review Maxwell help manual, to find “Impedance Boundary” and “When to Use Impedance Boundary”.
         There is more information in the manual, in Maxwell 2D Technical Notes -> Boundary conditions -> Impedance. Thanks.
  HDLI
- November 30, 2022 at 10:05 am
  
  turow
  Subscriber
  
  Hi HDLI, thanks for your quick response. The help, about impedance (SIBC in 2D-3D eddy-current solver) says that an effective equivalent curve (the first method a) in my question) is used, and is calculated only once before the iterative process. There are other techniques to solve the problem of non-linear ferromagnetic conductor material (e.g. mild steel of structural power transformer parts) using the impedance boundary with nonlinear permeability. My question is if the latest version of Ansys Maxwell is still using the procedure described in the help for NLSIBC problem.
  Thanku