抄録
This paper proposes a new structure of the interior permanent magnet (IPM) type self-bearing motor to realize self-sensing control technique based on the principle of differential transformer. Main flux (d-axis) directional permeance is different from its orthogonal (q-axis) direction because of the salient pole property in the IPM type motor. It means that the radial direction displacement information is not detected simply from the mutual inductance independently. Magnetic field analysis using finite element method was carried out to determine the location of the interior permanent magnets of the rotor. Prototype IPM self-bearing motor was designed and fabricated from the analyzed results. This IPM rotor structure is expected to realize self-sensing control.
