Force ripple reduction methods for tubular permanent magnet linear machines

Document Type : Research Article

Authors

1 School of Electrical and Computer Engineering, University of Hormozgan, Bandar-Abbas, Iran.

2 School of Electrical Engineering, Sharif University of Technology, Tehran, Iran.

Abstract

This paper presents some novel force ripple reducing techniques for Tubular Permanent-Magnet Linear Machines (TPMLMs) with the square-shaped cross section. These methods are very straightforward, so their implementation in TPMLMs with the square cross section is easy. An analytical form of machine parameters such as the thrust
force is obtained by solving the analytical field. A modular configuration for Permanent- Magnet (PM) pole is used to reduce teeth cogging force. Furthermore, the manufacturing cost of TPMLMs can be reduced by using modular pole PM. In this method, the width of PMs is calculated by using Fourier analysis and a sensitivity analysis has been conducted
to identify the robustness of this technique. Additional stator side methods are used to decrease the end face cogging force. Moreover, the stator teeth shifting method is proposed to reduce the electromagnetic force ripples. Also, the produced electromagnetic force of the machine is increased by using a delay in the power supply. 3D non-linear finite element analyses and experimental tests are performed to investigate the effectiveness and performance of proposed techniques.

Keywords

Main Subjects

References

References
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Scientia Iranica
Volume 32, Issue 10
Transactions on Computer Science & Engineering and Electrical Engineering
May and June 2026 Article ID:7165

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History

  • Receive Date: 06 October 2022
  • Revise Date: 28 February 2023
  • Accept Date: 15 August 2023

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