| Summary: | 碩士 === 國立交通大學 === 電機與控制工程系所 === 96 === Computer simulation has been an important tool in designing power converters. And the magnetic components are the required energy conversion devices in the converter circuits. However, there are multiple varieties of magnetic materials. Simulation library may not contain all the materials and the required physics. Therefore, this thesis provides a method for the circuit designers to establish their own models according to the concerned material characteristics including the nonlinear characteristics.
Jiles and Atherston model, denoted by J-A model, is used to build the hysteresis curve of magnetic materials. But the J-A model is usually built as a frequency independent one. In this thesis, the eddy current and excess effects are considered. Thus, the presented model has frequency dependent response. With the presented magnetic model, the inductance and multi-winding transformer models can be implemented easily. Finally the comparisons between the simulation results of the presented models and the measured results of the real transformers have been shown to evaluate the accuracy of the models.
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