Modelling and Analysis of a Generalized Equivalent Magnetic Circuit Model for Moving Coil Electromagnetic Linear Actuators

This paper proposes a generalized equivalent magnetic circuit model (EMCM) considering end-effect for a moving-coil electromagnetic linear actuator (MCELA). The model describes the magnetic networks in detail by incorporating the independent variable parallel branch number and constructing them as a function of variable branch number and geometric dimensions. An iterating method to update accurate relative permeability of the soft magnetic material under different working point is also taken into consideration. The comparison study of flux density and thrust force using FEM and EMCM demonstrates the effectiveness and computation efficiency of the proposed model. Additionally, a typical MCELA prototype is implemented to further validate the proposed EMCM. The proposed method can be used for the analysis and design of a wide range of electromagnetic actuators, in addition to its application to MCELA. © (2024), (International Association of Engineers). All rights reserved.