As the circuit is symmetrical, it is easy to find out how the magnetic flux divides. For example, in Figure 1 the magnetic flux in the center is twice that in each side.
Magnetic Circuits With Asymmetrical Parallel Parts
Consider the asymmetrical circuit diagramed in Figure 2.
In this case, due to the lack of symmetry, . There are two methods which allow you to calculate the magnetic flux on each parallel part.
The first method assumes that there is no magnetic saturation. The problem is then worked out by using magnetic permeabilities. For a magnetic circuit as the one diagramed in Figure 3, we obtain that:
where is the magnetic reluctance (for a more detailed discussion on the magnetic reluctance see Magnetic Reluctance ).
The second method is more of a trial-and-error method. It first implies dividing up the magnetic flux by hinting the right values, and then calculating for all paths. These should be equal, and if they are not, then you have to re-adjust the initial division of the magnetic fluxes.