A coupled field-circuit model of a 5-phase permanent magnet tubular linear motor

Abstract

A coupled field-circuit model of a 5-phase permanent magnet tubular linear motor A method for modeling of the dynamics characteristics for a 5-phase permanent magnet tubular linear motor (PMTLM) is presented. Its electromagnetic nonlinear field analysis with finite element method (FEM) has been coupled with the circuit model. The calculation model includes the equations for electrical circuits and mechanical quantities as well. They have been obtained using Lagrange's method. The calculated and measured waves of the mover position have been compared for several values of the excitation current. This comparison yields a good agreement. Presented calculation model is very useful in designing and optimization of the PMTLM and in the calculation of the parameters for the control algorithms intended for such a type of actuators.

A Model for Analyzing a Five-Phase Fractional-Slot Permanent Magnet Tubular Linear Motor with Modified Winding Function Approach

“…In papers [12,15], a model using semianalytical method was validated by the measurements results of the transient characteristics. Likewise, in order to verify the accuracy of the proposed model, model (18) has been established on the Matlab/Simulink platform where it has been simulated to analyze the transient characteristics of the studied motor in this section.…”

“…This is because the air gap flux density distribution has a deep influence on the thrust ripples [6]. There are many methods to calculate the air-gap flux density distribution, for example, finite element method (FEM) [7], analytical method (AM) [8][9][10][11], or SAM [12]. FEM is an accurate numerical prediction method but it is time-consuming; thereby, it is not suitable for the simulation of a controlled machine [13].…”

“…SAM can balance the accuracy of the model and the time consumed. In [12], a 5phase PMTLM has been modelled with this method where the calculation of the magnetic field distribution has been done with FEM in advance. Consequently, modelling the motor is time-saving.…”

“…It is a simple, fast modelling method for motors. This paper shows the detailed calculations of the parameters for a five-phase FSPMTLM, such as the detailed calculation of the detent force, which are not expressed distinctly in [12,15,16]. The model of the studied motor is established with MWFA and Park transformation theory, and the simulations results obtained by the mathematical model are compared with the ones obtained by SAM and measurements.…”

Analysis of permanent magnet linear motor parameters taking its heating into account

“…The investigated linear synchronous motor is a five-phase construction with permanent magnets [2,7,13]. The picture of the motor prototype has been presented in Figure 1.…”