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      Modeling and position-sensorless control of a dual-airgap axial flux permanent magnet machine for flywheel energy storage systems

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      Modeling and Position-Sensorless Control of a Dual-Airgap Axial Flux Permanent Magnet Machine for Flywheel Energy Storage Systems.pdf (475.5Kb)
      Author
      Nguyen, Trong Duy
      Beng, Gilbert Foo Hock
      Tseng, King-Jet
      Vilathgamuwa, Don Mahinda
      Zhang, Xinan
      Date of Issue
      2012
      School
      School of Electrical and Electronic Engineering
      Version
      Published version
      Abstract
      This paper presents the modeling and position-sensorless vector control of a dual-airgap axial flux permanent magnet (AFPM) machine optimized for use in flywheel energy storage system (FESS) applications. The proposed AFPM machine has two sets of three-phase stator windings but requires only a single power converter to control both the electromagnetic torque and the axial levitation force. The proper controllability of the latter is crucial as it can be utilized to minimize the vertical bearing stress to improve the efficiency of the FESS. The method for controlling both the speed and axial displacement of the machine is discussed. An inherent speed sensorless observer is also proposed for speed estimation. The proposed observer eliminates the rotary encoder, which in turn reduces the overall weight and cost of the system while improving its reliability. The effectiveness of the proposed control scheme has been verified by simulations and experiments on a prototype machine.
      Subject
      DRNTU::Engineering::Electrical and electronic engineering::Electric power
      Type
      Journal Article
      Series/Journal Title
      Journal of power electronics
      Rights
      © 2012 Korean Institute of Power Electronics (KIPE). This paper was published in Journal of Power Electronics and is made available as an electronic reprint (preprint) with permission of Korean Institute of Power Electronics (KIPE). The published version is available at: [http://www.jpe.or.kr/archives/view_articles.asp?seq=673]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
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