Design of Electromagnetic Linear Actuator by Using the Equivalent Magnetic Circuit Method

摘要

This paper is concerned with the design variations of electromagnetic linear actuator with divided coil excitation system such as colenoid (COL) and multipoler solenoid (MPS) by using the equivalent magnetic circuit (EMC). At first, the magnitude and direction of magnetic flux in each pole can be obtained by using the EMC method. And magnetic flux density of each pole region is calculated by the superposition principle. To make the magnetic flux density uniform in each pole, pole width is adjusted by the iteration method. Comparing with the initial model having equal pole distance, the generated clamping force of optimized model with EMC has increased and almost same force characteristics with the optimization results by the response surface methodology (RSM). Based on the results with EMC method, the characteristics of electromagnetic linear actuator are investigated with the variation of slot width. An electromagneic linear actuator is developed to produce clamping force of 40kN and the experimental results show that it can be used to hold workpiece firmly instead of the pneumatic cylinder in chucking system.