The Experimental Research of the Linear Motor

Abstract

The results of experimental researches of the linear electromagnetic motor in the form of graphs are presented. Dependence of the interlinked magnetic flux and inductance on the position of the secondary element, at different supply voltages of the motor, was obtained. Also, dependence of the interlinked magnetic flux on the current, with fixed position of the secondary element, and dependence of the traction force on the position of the secondary element, at different supply voltages, were obtained. On the basis of experimental diagrams the laws of changes of the relationships were established. The relationship between the change of the motor excitation coil inductance and the shift along the coordinate x, which can be approximated by analytical expression with the accuracy sufficient for engineering calculations, was established. The formula of the inductance change was obtained, with the presumption that magnetic system of the motor is not saturated and no magnetic link exists between the coils. After a number of experiments the conclusions were made defining dependences of the electromagnetic parameters of the linear electromagnetic motor on the position of the secondary element. When designing electric drives using linear electromagnetic motors (LEM), it is necessary to have mathematical model of the motor which allows calculating static and dynamic operating modes of the drive. Mathematical model takes into account static load of the motor and load components, which are dependent on the shift along the coordinate x and speed, and therefore can be used to examine the drives with the linear motors. Il. 5, bibl. 11 (in English; the summaries in English, Russian and Lithuanian).