Abstract：According to the special design characteristics of bearingless synchronous reluctance motor including torque windings and susepension windings, a new dichotomy approach of traditional motor stator windings was proposed. Based on the generation principle of radial suspension force in bearingless synchronous reluctance motor, mathematical model of radial suspension force was deduced. The 0.5 kW bearingless synchronous reluctance prototype motor was designed by dichotomy approach with two pole-pair torque windings and one pole-pair radial suspension windings. The distribution of magnetic fields was simulated by ANSYS, and the relationship between radial suspension force and windings′ current was determined. Effects of magnetic saturation and size of air-gap on radial suspension force were also studied. The results show that the prototype motor′s rotor can be suspended with 2.7 A rated current of torque windings and radial suspension force windings, 0.35 mm motor air-gap and 200 N of rotor radial suspension force
2011, Vol. 32 
