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Sensors 2017, 17(11), 2662; https://doi.org/10.3390/s17112662

Magnetic Flux Distribution of Linear Machines with Novel Three-Dimensional Hybrid Magnet Arrays

School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China
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Received: 18 September 2017 / Revised: 26 October 2017 / Accepted: 9 November 2017 / Published: 18 November 2017
(This article belongs to the Special Issue Mechatronic Systems for Automatic Vehicles)
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Abstract

The objective of this paper is to propose a novel tubular linear machine with hybrid permanent magnet arrays and multiple movers, which could be employed for either actuation or sensing technology. The hybrid magnet array produces flux distribution on both sides of windings, and thus helps to increase the signal strength in the windings. The multiple movers are important for airspace technology, because they can improve the system’s redundancy and reliability. The proposed design concept is presented, and the governing equations are obtained based on source free property and Maxwell equations. The magnetic field distribution in the linear machine is thus analytically formulated by using Bessel functions and harmonic expansion of magnetization vector. Numerical simulation is then conducted to validate the analytical solutions of the magnetic flux field. It is proved that the analytical model agrees with the numerical results well. Therefore, it can be utilized for the formulation of signal or force output subsequently, depending on its particular implementation. View Full-Text
Keywords: linear machine; hybrid magnet arrays; multiple movers; magnet flux; magnetic vector potential; FEM linear machine; hybrid magnet arrays; multiple movers; magnet flux; magnetic vector potential; FEM
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Yao, N.; Yan, L.; Wang, T.; Wang, S. Magnetic Flux Distribution of Linear Machines with Novel Three-Dimensional Hybrid Magnet Arrays. Sensors 2017, 17, 2662.

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