where [[mu].sub.r] is the permanent-magnet's recoil relative permeability, [B.sub.r] the permanent-magnet residual flux density, [K.sub.d] the leakage

flux factor, [K.sub.f] = [B.sub.gpk]/[B.sub.g] the peak value corrected factor of air-gap flux density in the AFPM machine's radial direction, and [K.sub.c] the Carter factor.

[sup.[mu]]r is the recoil relative permeability of the magnet, [B.sub.r] is the residual flux density of the PM material, [K.sub.d] is the leakage

flux factor, [K.sub.c] is the Carter factor, [K.sub.f] = [B.sub.gpk]/[B.sub.g] is the peak value corrected factor of air gap flux density in radial direction of the AFPM motor.

where [[florin].sub.[GAMMA]q] is the

flux factor being required by the quantum condition.

where [[mu].sub.r] is the magnet's recoil relative permeability, Br is the permanent-magnetmaterial-residual-flux density, [k.sub.d] is the leakage

flux factor, [k.sub.C] is Carter factor, [k.sub.f] = [B.sub.gpk]/[B.sub.g] is the peak value corrected factor of the air-gap flux density in radial direction of the AFPM motor.

[[mu].sub.r] is the recoil relative permeability of the magnet, [B.sub.r] is the residual flux density of the PM material, [K.sub.d] is the leakage

flux factor, [K.sub.c] is the Carter factor, [K.sub.f] = [B.sub.gpk]/[B.sub.g] is the peak value corrected factor of air gap flux density in radial direction of the AFPM motor.