The Design Method for Actuators with Field Magnets of Dual Halbach Arrays

Abstract:

The proposed magnetic circuit precisely evaluates magnetic fluxes between the field magnets of dual Halbach arrays. In the case that an actuator is configured with the dual Halback arrays and the armature coils between them, the air gap length between the dual Halbach arrays gives the maximum number of interlinkage magnetic fluxes with the armature coil through algebraic approach. The new design method is on the basis of the proposed magnetic circuit. This method makes it clear that the air gap length should be more than 1.2 times longer than the permanent magnet poles length. The utility of this design method is verified through designing cylindrical linear synchronous motor provided with the dual Halbach arrays.

• Periodical: Applied Mechanics and Materials (Volumes 416-417)
• Pages: 227-232
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.416-417.227
• Online since: September 2013
• Authors: Mimpei Morishita, Takayuki Fukuda
• Keywords: Cylindrical Linear Synchronous Motor, Dual Halbach Arrays, Magnetic Circuit, Number of Interlinkage Magnetic Fluxes

References

[1] M. Morishita, S. Yokoyama and R. Okuyama, Simplified calculation method for magnetic flux density distribution between dual Halbach arrays, IEEJ. Trans. IA, vol. 132, No. 5, pp.596-597, May 2012. (in Japanese).

DOI: 10.1541/ieejias.132.596

[2] T. Fukuda, Y. Okuda, Y. Omori and M. Morishita, A study on a cylindrical linear Synchronous motor with dual Halbach arrays, IEEJ. Papers of Joint Tech. Meeting on MD and LD, LD-12-086, pp.17-20, Des. 2012. (in Japanese).