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Design and Experimental Verification of a High Force Density Tubular Permanent Magnet Linear Motor for Aerospace Application
ISSN: 2641-9637, e-ISSN: 2641-9645
Published September 16, 2019 by SAE International in United States
Event: AeroTech Europe
Citation: Kano, Y. and Satou, K., "Design and Experimental Verification of a High Force Density Tubular Permanent Magnet Linear Motor for Aerospace Application," SAE Int. J. Adv. & Curr. Prac. in Mobility 2(2):818-827, 2020, https://doi.org/10.4271/2019-01-1911.
This paper presents the design and construction of a high force density tubular permanent-magnet (PM) linear motor. A strut structure of a tubular PM linear motor developed to improve resistance to impurities and structural rigidity is described.
In the design, computationally efficient two-dimensional finite-element analysis is used to estimate the motor force density. The motor’s design is optimized for the major pole number/slot number combinations of 8/24, 16/24, 20/24, 28/24, 32/24, and 40/24. The optimized motor design of a three-phase 16/24 combination with one-layer winding achieved the highest force-to-mass density. The force-to-mass density of the designed motor is higher than that of the first prototype motor by a factor of 5. The validity of the proposed design method and the expected drive characteristics are experimentally verified using the prototype.