Analysis and Control of Slotless Self-Bearing Motor

Nguyen Nguyen,Bui Bui,Ueno Ueno

doi:10.3390/act8030057

Abstract

A self-bearing motor (SBM) is an electric motor with a magnetically integrated bearing function, that is, it can provide levitation and rotation simultaneously as a single actuator. This paper presents the design, operating principle and control system for the slotless self-bearing motor (SSBM). In this design, the stator has no iron core but includes six-phase coils. The rotor consists of a permanent magnet and an enclosed iron yoke. Magnetic forces generated by the interaction between stator currents and the magnetic field of the permanent magnet are used to control the rotational speed and radial position of the rotor. In this paper, the torque and radial bearing forces are analyzed theoretically with the aim to develop an improved control system. In order to confirm the proposed control method, an experimental system was constructed and tested. Simulation and measurement results show that the SSBM can work stably in modes such as start, reverse, rotation load and external radial pulse forces.

Highlights

IntroductionMagnetic bearing motor, withwith its non-contact levitating capability, has been moreof
IntroductionRecently, magnetic bearing motor, withwith its non-contact levitating capability, has been moreofRecently,the the magnetic bearing motor, its non-contact levitating capability, hasofbeen and more interest to many researchers, thanks to its advantages such as no friction loss, no abrasion more and more interest to many researchers, thanks to its advantages such as no friction loss, no and lubrication-free operation
14b illustrates thecontroller displacements and the speed error was set up x = 0.13

Summary

Introduction

Magnetic bearing motor, withwith its non-contact levitating capability, has been moreof. Recently,the the magnetic bearing motor, its non-contact levitating capability, hasofbeen and more interest to many researchers, thanks to its advantages such as no friction loss, no abrasion more and more interest to many researchers, thanks to its advantages such as no friction loss, no and lubrication-free operation. The rotor consists of a shaft, a cylindrical two-pole permanent magnet, a back yoke, and one part to fix them together. The air gap between the two-pole permanent magnet, a back yoke, and one part to fix them together. The iron yoke has a great effect on reducing energy permanent magnet becomes zero. The iron yoke has a great effect on reducing energy loss

Methods

Results

Conclusion