Affiliations: [a] Nanjing University of Science and Technology, Nanjing, Jiangsu, China
Correspondence:
[*]
Corresponding author: Siqin Chang, Nanjing University of Science
and Technology, Nanjing, Jiangsu, China. E-mail: changsq@njust.edu.cn
Abstract: This paper presents the research on a problem which is difficult to
implement in the actual magnetization process of Electromagnetic Linear
Actuator (ELA)'s permanent magnets radially magnetized. Given magnetic field
symmetry and assembly feasibility, it creatively puts forward four parallel
magnetized-permanent magnets joint schemes (PM-PMs Joint Schemes) of the ELA.
On the basis of mathematical modeling and simulating calculation, further study
on the comparison of magnetic field effects and ELA's performance in different
joint schemes is accomplished. Then, through the Analytic Hierarchy Process
(AHP), 8 parallel magnetized-permanent magnets joint model (8 PM-PMs Joint
Model) is determined as the best choice after optimizing selection. Further,
the 8 PM-PMs Joint Scheme is trial-produced and its air gap flux density and
electromagnetic force are also tested. Compared with simulating calculation,
the maximum error from test result is within 4.3%, verifying the accuracy of
mathematic model and simulating calculation.
Keywords: Electromagnetic linear actuator, radial magnetization, parallel magnetization, joint model, analytic hierarchy process
