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Hofmann, Tim; Huepfel, Marcel; de Haas, Oliver; Jocher, Agnes
Journal of magnetism and magnetic materials, 04/2024, Volume: 596Journal Article
Advancing permanent magnet arrays for linear electric machines is a compelling endeavor with the potential to further improve efficiencies in the fields of power generation or passenger and cargo transportation. Permanent magnets offer an unparalleled advantage by providing a consistent and efficient source of magnetic flux density without the need for external power input. This remarkable property allows for the development of smaller, lighter, and more energy-efficient electric machines, making them ideal for applications in several industries. Here, we present the design of an optimal linear Halbach array with a sinusoidal distribution of the magnetic flux density component Bz perpendicular to the surface of the array. A large scale and easy scalable six-segmented Halbach array has been built without the use of a steel backplate enabling a lightweight and compact design. Numerical results of the magnetic flux density distributions are calculated by relying on finite element methods and are compared with experimental measurements of the magnetic flux density, showing good agreement. The demonstration revealed that, with an optimal magnet configuration, the absence of a backplate does not result in any diminishment of magnetic flux density strength. Display omitted •Design and construction of optimal linear Halbach arrays without magnetic backplate.•Automated assembly machine to produce linear magnet arrays from single magnets.•Numerical and experimental analysis of magnetic flux density distributions.
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