A simple means of predicting the dynamic response of electromagnetic actuators

The need for a dynamic performance prediction of commercial solenoids is frequently encountered in engineering applications. This applies to a wide range of machine systems and products employing digital control and requiring actuators with good dynamic performance. Normally structural details are insufficient and the simulation of the highly non-linear response to electrical drive signals is difficult. A method is presented for simulation of the dynamic performance of solenoid actuators including the identification of the magnetic reluctance parameters. The identification process is based on the reciprocal of the square root of developed magnetic force for a solenoid being proportional to the armature stroke over a certain range. A linear least-square method is used to find the linear coefficient in this relationship.