The analysis and comparation of the half-coiled short-pitch windings with different phase belt are presented in the paper. The half-coiled short-pitch windings can supply the odd and even harmonics simultaneously, which can be applied in multiphase bearingless motor (MBLM). The space harmonic distribution of the half-coiled short-pitch windings with two kinds of phase belt is studied wi th resp...

In this paper, a novel bearingless motor (50 N · m/ 2.5 kW) for high-purity mixing applications is presented. The motor consists of a stator with concentrated windings and an exterior rotor with permanent magnets. The rotor is propelled and spatially suspended only by means of magnetic fields. This paper deals with the functionality and the mechanical setup of the new motor. Thereby, the optimi...

In the bearingless induction motor (BIM), rotor of BIM is supported by magnetic force, radial position control technique studied in this paper, an approximation and simplification are used to create a linearized model suspension system. The objective paper design system that overcomes limitations traditional controller improve performance achieve high stability, even if it exposed external dist...

To improve the quality of starting torque and suspension force, a composite cage rotor bearingless induction motor (CCR-BIM) is designed, which adopts structure that combines an inner outer rotor. First, overall CCR-BIM specially designed analyzed for principle, mathematical model force deduced. Second, initial structural parameters are determined, qualities, such as quality, compared between p...

In order to achieve the speed sensorless control of a bearingless induction motor (BL-IM), novel sliding mode observation (SMO) method is researched. First all, according mathematical model BL-IM system, stator current and that rotor flux-linkage are derived. overcome chattering problem observer, continuous saturation function adopted replace traditional sign function. Then, SMO derived, stabil...