## Electronics

#### mag_J, vs complexMag_J

• junpyo
Subscriber

Hello,

I am working on toroid inductor simulation (Maxwell 3D eddy-current solution) to understand the eddy current and the loss created in my laminated core. I checked out the online help but I still am not completely sure what Mag_J and ComplexMag_J means. I guess ComplexMag_J is just an amplitude of varying J (Fm or Im). Then what's Mag_J? Is it just the real part of J or amplitude of varying J at a certain phase?

Regarding ohmic loss calculation:

The definition has the term, J multiplied by J conjugate. Is that J, complexMag_J or Mag_J or something else? So, an ohmic loss is directly correlated to complexMag_J instead of Mag_J?

• mchristi
Ansys Employee

In the Eddy Current (frequency domain) solver, J_vector is a complex vector with real, imag components in 3 spatial directions: Jx, Jy, Jz.

1)     Using the calculator, Mag_J returns real component of SQRT (Jx^2 + Jy^2 + Jz^2).

2)     Ohmic loss uses J_vector and is defined as: integral (J_vector dot J_vector(conj) /2 conductivity) dV (Reference formula in Maxwell online help topic “Ohmic Loss for an Eddy Current Solution&rdquo