Abstract
The thrust of a linear DC motor (LDM) depends on the magnetic characteristics of the magnetic material used for the yokes. It is thus necessary to clarify the relation of this material and the thrusts in order to design LDMs easily. This paper considers the relation for a thin (under 40-mm-thick) LDM with a long stroke (105 mm) on the basis of measurements. The results of the measurements were as followings; (1) the maximum magnetic flux density shows a tendency to be saturated at 10 kA/m in the five measured magnetic materials, (2) the thrust constant was saturated, and (3) the saturated value of the thrust constant of LDMs is proportional to the maximum magnetic flux density of the magnetic material used for the center yoke.
