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

Nguyen, Trong Duy, Beng, Gilbert Foo Hock, Tseng, King-Jet, Vilathgamuwa, D. Mahinda, & Zhang, Xinan (2012) Modeling and position-sensorless control of a dual-airgap axial flux permanent magnet machine for flywheel energy storage systems. Journal of Power Electronics, 12(5), pp. 758-768.

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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.

Impact and interest:

1 citations in Scopus
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ID Code: 72271
Item Type: Journal Article
Refereed: Yes
Keywords: Dual-Airgap Axial Flux Permanent Magnet Machines, Flywheel Energy Storage Systems, Axial Levitation Force Control, Sensorless vector control
DOI: 10.6113/JPE.2012.12.5.758
ISSN: 1598-2092
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Korean Institute of Power Electronics
Deposited On: 02 Jun 2014 00:14
Last Modified: 02 Jun 2014 23:14

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