Analysis and calculation of unilateral magnetic force in oil-submersible permanent magnet linear motor
LI De-ru
Abstract：In order to solve the problem that the eccentricity of tubular permanent magnet linear synchronous motor (TPMLSM) leads to huge unilateral magnetic force and thus the friction between the stator and mover reaches as high as several thousands N,the model for TPMLSM was established,and the structure characteristics of TPMLSM and the cause of unilateral magnetic force in the TPMLSM were analyzed.In addition,the air gap magnetic field under the eccentric condition of TPMLSM was analyzed with the magnetic circuit method. With the Maxwell tensor theorem, the relationship between the structure parameters,eccentric parameters and unilateral magnetic force of TPMLSM under no-load condition was deduced,and the unilateral magnetic force was calculated with the deduced results.The results show that the proposed analytical method has a certain correctness and accuracy.
Keywords：tubular permanent magnet linear motor (TPMLSM)eccentricityunilateral magnetic forceaxial magnetizationmagnetic circuit methodair gap magnetic fieldanalytical calculationfinite element
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-5 )