This analysis focused on looking for a method to optimize electromagnetic actuators in overall operating conditions. With disadvantages of slow convergence and poor accuracy, available optimization methods are difficult to achieve optimization results of electromagnetic actuators in overall operating conditions. In order to solve the problem, an optimization method suitable for overall operating conditions is proposed based on the electromagnetic difference model. The method combines advantages of the analytical method and finite element method. It uses numerical method to establish static characteristic sensitivity matrix of optimization system and parameter optimization results are obtained by optimizing difference model of target characteristics and current characteristics. In this study, a diesel speed electromagnetic actuator as an example, quantitative analysis of system parameters effect on static characteristics in overall operating conditions is done. Using the optimization method, in overall operating conditions, average electromagnetic force and standard deviation electromagnetic force of the electromagnetic actuator are optimized. The simulation results verify the optimization method is simple, effective and applicable.
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