At last, we simulate the characteristic of near wall conductivity of the sheath with groove by locating the groove sheath model in the axial electric field and the radialmagneticfield.
最后，在外加径向磁场和轴向电场的条件下，模拟计算了矩形沟槽鞘层的近壁传导特性。
2
The numeric solutions on magneticfield of plane helix was solved by MATLAB, it helps to design radial guiding magnetic in engineering.
There are mixed magneticfield system of axial and radial in hybrid stepping motors, and the magneticfield in the gap (or teeth layer)is distributed uneven along the axial direction.