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An electromagnetic linear motor with double-sided back irons is proposed in this paper. The magnetic field is formulated analytically based on magnetic vector potential and Laplace's equations. The simulation result is compared with numerical result from finite element calculation. It shows that the analytical model fits with numerical result closely. The magnetic field model is employed to analyze...
Ferromagnetic material affects the magnetic field of electromagnetic actuators significantly. This paper studies the effect of back iron on magnetic field of linear motors. Designs of linear motors with single-sided, double-sided, and without back irons are analyzed quantitatively. The magnetic field for different structures is formulated analytically based on magnetic vector potential. The simulation...
The magnetization patterns of permanent magnets affect the magnetic field distribution of electromagnetic machines significantly. A tubular linear machine with double-layered Halbach arrays is proposed in this paper to enhance the magnetic flux density, and thus the force output. The magnetic field of the machine is formulated analytically with vector potential and Bessel's functions. The analytical...
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