Development of the Design Algorithm Using the Equivalent Magnetic Circuit Method for Colenoid Type Electromagnetic Linear Actuator

Department of Electrical Engineering, Dong-A University, Busan 49315, Korea(Received 31 March 2016, Received in final form 19 April 2016, Accepted 20 April 2016)This study proposes the design algorithm of an electromagnetic linear actuator with a divided coil excitation system, such as thecolenoid (COL) system, using the equivalent magnetic circuit (EMC) method. Nowadays, the clamping device is used to holdworkpiece in the electrically driven chucking system and is needed to produce a huge clamping force of 40 kN like hydraulic system.The design algorithm for electromagnetic linear actuator can be obtained using the EMC method. At first, the parameter map is used todecide the slot width ratio in the initial design. Next, to make the magnetic flux density uniform at each pole, the pole width isadjusted by the pole width adjusting algorithm with EMC. When the dimensions of the electromagnetic linear actuator are decided, theclamping force is calculated to check the desired clamping force. The design results show that it can be used to hold a workpiecefirmly instead of using a hydraulic cylinder in a chucking system.Keywords: colenoid, electromagnetic linear actuator, equivalent magnetic circuit, electrically driven chucking system