A Novel Modeling Method for Nonlinear Magnetic Devices Reflect Magnetic Circuit and Circuit Characteristics

An novel hybrid modeling method of magnetic device with transformer and inductor is proposed, which combining with advantages of magnetic circuit - electric circuit dual transformation method and and gyrator - capacitance transformation method. The new modeling method proposed in this paper can reflect the characteristics of magnetic circuit and electric circuit at the same time, as well as physical concept of the parameters. According to electromagnetic theory, unified model which reflecting magnetic circuit and the circuit is established, and the nonlinear hybrid simulation model of reflecting impedance characteristics and hysteresis effect is proposed based on the Fractional characteristic analysis of magnetic coupling transformer and inductor and mathematical derivation. modeling and analysis the inductor and transformer magnetic integration of LLC converter using the proposed method, results confirmed the correctness and effectiveness of the proposed magnetic device hybrid modeling method, the design concept is clear and the model is simple which can help to effectively broaden the theory of modeling method for nonlinear magnetic devices combining inductance and transformer.