An Adaptive Equivalent Circuit Modeling Method for the Eddy Current-Driven Electromechanical System

An adaptive equivalent circuit method is developed for analyzing eddy current-driven electromechanical systems in an efficient and accurate way. The problem is analyzed by transferring the system to an equivalent circuit model, which is set up by adaptively dividing the plate into a series of segments based on the field continuity condition at the interface of segments. The performance is obtained by solving the circuit equations combined with motional equations with the Runge-Kutta-Fehlberg method. The circuit parameters, such as self inductance and mutual inductance, are evaluated from the geometry parameters by using an analytic method. The proposed method is applied to analyze two eddy current-driven electromechanical systems, Thomson-coil actuators used for a practical engineering problem and TEAM Workshop Problem 28. The accuracy and efficiency of the proposed method are verified by comparing the calculation result with the FEM calculation result and the experimental result.