1, determine the size and material of the magnetic circuit.
2. Calculate the cross-sectional area of the magnetic circuit.
3. Calculate the magnetic flux.
4. Calculation of magnetic potential: Calculate the magnetic potential according to the length of magnetic circuit and magnetic flux.
5. Calculate the magnetic resistance.
6. Calculate the magnetic flux density.
7. Calculate the magnetic field strength.
8. Calculate the magnetic field lines. The above are the basic steps to calculate the figure-eight magnetic circuit, and the specific calculation method needs to be adjusted and optimized according to the specific magnetic circuit structure and material.