The Hollow Cylinder Axial Flux Permanent Magnet (or Hollow Cylinder Axial Flux) component models a hollow cylinder permanent magnet with length $l$, inner radius $r_i$, outer radius $r_o$, and sector angle $\mathrm{\theta }$. The flux flow is axial through the sector.

The material parameter specifies the name of a record of class Hard Magnetic Material, which defines the magnetic material. A record of that class, with the corresponding name, must exist in the model, either at the same or higher level. Records of typical materials are in the palette Magnetic > Material > Hard.

The Use default material boolean parameter, when true, sets the name of the material parameter to HardMaterial1, which corresponds to the default name assigned to a record of the appropriate class.  To use a different name, uncheck the box and enter the name in parameter that appears.

$A\=\frac{1}{2}\mathrm{\theta }\left(r_o^2-r_i^2\right)$

$\mathrm{\Phi }\={\mathrm{\Phi }}_p\=-{\mathrm{\Phi }}_n$

${\mathrm{\Phi }}_{\max }\={\mathrm{material.B}}_{r}A$

$V_m\=V_{m_p}-V_{m_n}\=V_{m\,\max }\left(1\+\frac{\mathrm{\Phi }}{{\mathrm{\Phi }}_{\max }}\right)$

$V_{m\,\max }\={\mathrm{material.H}}_{\mathrm{cB}}l$