How to derive Magnetic Vector Potential

[wijono]

Hi All ...

We usually use Magnetic Vector Potential A to calculate back emf of a coil in a permanent magnet machine. Unfortunately, in some FEA software, especially 3D, parameter calculated by default is B and H.
Would anybody help me? I need a equation to derive A from other parameter (B or H, or others).
Many thank's

Wijono

 

[prex]

The relationship between B and A is
B=[∇] [×] A
or
B_x=[∂]A_y/[∂]z-[∂]A_z/[∂]y
and so on.
Not very practical to transform...

prex

http://www.xcalcs.com

Online tools for structural design

 

[wijono]

Hi Prex,

Thank's for your help.
The further problem is if we have to find A for a given B.
In some 2D software, the A calculation is featured, but not in it's 3D.

Regards,

Wijono