Wide Air-gap Control for Multi-module Permanent Magnet Linear Synchronous Motors without Magnetic Levitation Windings

Deok-Je Bang; Seon-Hwan Hwang

Wide Air-gap Control for Multi-module Permanent Magnet Linear Synchronous Motors without Magnetic Levitation Windings

Deok-Je Bang

Seon-Hwan Hwang

Vol. 16, No. 5, pp. 1773-1780, Sep. 2016

10.6113/JPE.2016.16.5.1773

D-axis control

Independent vector control

MM-PMLSM

Position control

Wide air-gap control

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Abstract

This paper proposes a wide air-gap control method for the multi-module permanent magnet linear synchronous motor (MM-PMLSM) based on independent vector control. In particular, the MM-PMLSM consists of symmetrical multi-module and multi-phase structures, which are basically three-phase configurations without a neutral point, unlike conventional three-phase machines. In addition, there are no additional magnetic levitation windings to control the normal force of the air-gap between each stator and mover. Hence, in this paper, a dq-axis current control applying a d-q transformation and an independent vector control are proposed for the air-gap control between the two symmetric stators and mover of the MM-PMLSM. The characteristics and control performance of the MM-PMLSM are analyzed under the concept of vector control. As a result, the proposed method is easily implemented without additional windings to control the air-gap and the mover position. The effectiveness of the proposed independent vector control algorithm is verified through experimental results.

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Cite this article

[IEEE Style]

D. Bang and S. Hwang, "Wide Air-gap Control for Multi-module Permanent Magnet Linear Synchronous Motors without Magnetic Levitation Windings," Journal of Power Electronics, vol. 16, no. 5, pp. 1773-1780, 2016. DOI: 10.6113/JPE.2016.16.5.1773.

[ACM Style]

Deok-Je Bang and Seon-Hwan Hwang. 2016. Wide Air-gap Control for Multi-module Permanent Magnet Linear Synchronous Motors without Magnetic Levitation Windings. Journal of Power Electronics, 16, 5, (2016), 1773-1780. DOI: 10.6113/JPE.2016.16.5.1773.