Axial flux permanent magnet servo motor with sixteen poles

A disk-type servo motor which is novel in several aspects is presented. It has a high pole number (16) and a two-phase winding. The disk-type design has two stators and each stator carries only one phase winding. Two mathematical models are introduced, one linear model which succeeds in predicting the behaviour of the machine when the currents are relatively low, and another which accounts for the saturation in the stator iron at high current levels. The machine is highly discrete in structure, having only one slot per pole in each stator. The models take this into account. Laboratory test results are presented which demonstrate that the machine is capable of twice the acceleration claimed by the commercial manufacturer of a similarly rated high-performance servo motor.<>