Design of hybrid thrust Magnetic bearing for heavy rotating shaft considering self-weight compensation according to axial load

In this paper, the design and analysis of a HTMB for a 6kW 60,000-rpm-class spindle for micro-drilling machine are presented. This paper is divided into three main parts: the design of HTMB, the influence of self-weight that changes according to the axial load, and the redesign of HTMB considering self-weight compensation according to axial load. The first part focuses on the design of HTMB which use a finite element method (FEM), deals with a general design that does not consider self-weight according to axial load. The second part is based on the validation of the initial designs by experiments using a manufactured HTMB, and deals with the influence of self-weight that changes according to the axial load. Finally, redesign of HTMB for compensation self-weight with axial load, and validation of the results by the two-dimensional FEM, and then by experiments using a manufactured model. In a future study, a more specific comparison with an accurate design method in consideration of the selfweight with axial load, will be thoroughly investigated for its contribution to related researches and industrial applications.