Graduation Year
2007
Document Type
Dissertation
Degree
Ph.D.
Degree Granting Department
Electrical Engineering
Major Professor
Stephen E. Saddow, Ph.D.
Keywords
Jiles-Atherton model, Transformer, Inductor, BH loop, Power electronics
Abstract
Inductors and transformers are electrical devices critical to power conversion systems. The current-voltage (I-V) behavior of these devices is very nonlinear as a result of the magnetic cores used in their construction. However, in the design of these power conversion systems the present state of Spice-based models is limited to low frequency and room temperature effects. An addition to the present model found in many Spice type environments, Jiles-Atherton, is the subject of this work. Chapter 1 of this dissertation introduces the source of these nonlinearities as being a result of the relationship between the magnetic flux density, B, and the applied magnetic field, H. Chapter two then derives the original mathematical model used in the Spice, Jiles-Atherton, to provide a physical basis of the addition to the model. The original derivation as it can be found in the referenced literature shows that a temperature and frequency dependence on the model does not exist. This work will seek to add such a dependence on temperature first followed by frequency. Using this approach, the temperature dependence can be modeled without the core experiencing self-heating. The model therefore must be capable of being further modified after the temperature dependence is added.
Scholar Commons Citation
Walker, Jeremy M., "Measurement and modeling of the anhysteretic magnetization of magnetic cores for temperature and frequency dependent effects" (2007). USF Tampa Graduate Theses and Dissertations.
https://digitalcommons.usf.edu/etd/2401
