Speaker
Description
This paper proposed a 3D magnetic equivalent circuit (3D MEC) method to analyze the flux linkage characteristics of double-sided switched reluctance linear motor (DSRLM). Firstly, the 3D finite element model (3D FEM) of DSRLM is established to analyze the magnetic field line distribution of the motor. Then, the magnetic field distribution of two representative positions (unaligned and aligned position) is mainly analyzed, and the magnetic resistance of each part was obtained by the magnetic flux tube method. According to the similarity principle, the magnetic flux tube with irregular shape is equivalent to a simple magnetic circuit that is easy to calculate. The permeability and flux in each section are assumed to be constant, and the reluctance of each part is calculated. According to the similarity of magnetic circuit and electric circuit, the 3D MEC model of DSRLM was established. Secondly, according to the established 3D MEC model, the Gauss–Seidel iteration method is used in MATLAB to solve the flux linkage-current magnetization curve and the thrust-mover position curve at two representative positions, and then, compare them with the curves of the two positions derived from the 3DFEM model. Finally, experimental verification is carried out，and it shows that the solution is feasible because the error of 3D MEC is within acceptable limits.
