Two Phase Dual-Stator Axial-Flux PM BLDC Motor With Ironless Rotor Using Only-Pull Drive Technique

Tanveer Yazdan,Byung-Il Kwon,Jung-Woo Kwon,Shahid Atiq,Noman Baloch

doi:10.1109/access.2019.2923711

Abstract

This paper proposes a two-phase dual-stator axial-flux permanent magnet brushless dc motor with an ironless rotor for higher torque per magnet volume using the only-pull drive technique. The advantage of the ironless rotor is that it reduces magnet volume by providing an effective flux linkage, while the only-pull drive technique, which involves only the pull process, benefits from the use of thin magnets that do not experience the irreversible demagnetization. The axial-flux configuration of the proposed dual-stator motor was adopted because of its capability of achieving the desired trapezoidal back electromotive force that maximizes the advantages of the only-pull drive technique. The thin magnets were fixed on the ironless rotor using a non-magnetic structure, and the stator was particularly designed to implement the only-pull drive technique. The performance of the motor was analyzed in terms of torque per magnet volume using the finite element analysis and validated by the experimental results.

Highlights

Due to their high-performance characteristics such as higher torque density, low maintenance cost, and high reliability, brushless permanent magnet (PM) motors have been widely used in various industrial automation processes including aerospace, traction, and medical applications.The associate editor coordinating the review of this manuscript and approving it for publication was Christopher H
To overcome the problem of low torque per magnet volume, a two phase dual-stator axial-flux (DSAF) PM motor with an ironless rotor driven by the Only-Pull drive technique is proposed
The performance of the proposed ironless DSAF motor is compared in terms of torque per magnet volume with that of an iron core dual-stator radial-flux (DSRF) and an ironless DSRF motor

Summary

Introduction

Due to their high-performance characteristics such as higher torque density, low maintenance cost, and high reliability, brushless permanent magnet (PM) motors have been widely used in various industrial automation processes including aerospace, traction, and medical applications.The associate editor coordinating the review of this manuscript and approving it for publication was Christopher H. To overcome the problem of low torque per magnet volume, a two phase dual-stator axial-flux (DSAF) PM motor with an ironless rotor driven by the Only-Pull drive technique is proposed.

Results

Conclusion