The High Frequency Dynamic Magnetic Core Inductance Model Based On Pspice Software Research

Magnetic core inductance is often applied in RF communication system and switch power supply, to reduce cost and increase the success rate, usually making simulation before experiment. However, we can only call the ideal inductance that the software already has, but that has ignored the hysteresis characteristics of the magnetic core inductance, so cause the big difference between the simulation results and the actual value, and the simulating results couldn’t guide the experiment effectively. According to this problem, this article aim to research establishing a high frequency and dynamic magnetic core inductance model.It is the key to establish a mathematical model that describes the hysteresis characteristics of magnetic core inductance for the high frequency and dynamic magnetic core inductance model. Basing on Jile-Atherton static hysteresis mathematical model, this research import a describing function to represent the nonlinear characteristics of magnetic core inductance in high frequency, established a high frequency magnetic core inductance model, and overcome the defect of Jiles-Atherton model that can only used in low frequency.Converted the high frequency and dynamic magnetic core inductance mathematic model into circuit model by using of the powerful ABM function of PSpice software, and packaged it as a magnetic core inductance components that can be called directly, it brings much convenience for calling such components in simulation.The problem that nonlinear function with zero result and non-result has been resolved by using the fsolve function in MATLAB, it has solved the numerical solution of basic parameters in Jiles-Atherton static hysteresis mathematical model. Using the least square method to solve the parameters of dynamic hysteresis mathematical model, it has avoided the magnetic resonance experiment for natural frequency resolution.The conformity degree reaches above70%after comparing the hysteresis loop of the magnetic core inductance model’s simulation and the actual test results. And compared ideal inductance and the magnetic core inductance in this article when called by the three order low-pass filter, the result indicates that the output response of magnetic core inductance is later than ideal inductance, and the cut-off frequency is slightly higher, output signal waveform has distorted, that phenomenons deeply indicates the hysteresis characteristics and nonlinear characteristics of magnetic core inductance.In summary, this article established a directly called high frequency and dynamic model of magnetic core inductance, it is more close to the actual working results if call such model to simulate, that has guided the circuit design work and related experiments effectively.