Affiliations: [a] College of Water and Electricity Engineering, Xi'an
University of Technology, Xi'an, Shaanxi, China | [b] Chongqing Jiangbei High School, Chongqing, China | [c] Industrial and Commercial Bank of China Xi'an
Municipal Branch, Xi'an, Shaanxi, China
Correspondence:
[*]
Corresponding author: Lulin Tian, College of Water and
Electricity Engineering, Xi'an University of Technology, Xi'an, Shaanxi, China.
E-mail: [email protected]
Abstract: The cost of precision conical permanent magnetic bearings (PMB) is
very expensive in the engineering manufacture. Step conical PMB, which consists
of by piling up several couples PM rings of different diameters with
rectangular cross section, in a conic disposition, characterized by such
advantages as low cost and easy manufacture. Based on the magnetic field of
planar point magnetic charge, virtual work principle, and superposition
theorem, combining two parallel rectangular section permanent magnets (PM) and
the structure trait of step conical PMB, the magnetic force analytical model of
step conical PMB is established, and the relationship between magnetic force
and structure parameters of step conical PMB is analyzed, and the correctness
of the magnetic force analytical model is validity by ANSYS simulation,
comparisons show that the analytical solution closely matches with the results
of the finite element analysis. The results indicate that the magnetic force of
step conical PMB is proportional to the magnetic annular average perimeter and
the square of residual magnetism induction density, and that the magnetic force
increases with an increment in the magnetic annular section size, the axial
magnetic force increases with an increment in the axial deflection, the radial
magnetic force increases with an increment in the radial deflection. The paper
provides technical support for design and structure parameters optimization of
step conical PMB.
Keywords: Step conical permanent magnetic bearing, magnetic force, analytic model, ANSYS simulation
