Low-Order Dynamic Magnetic Equivalent Circuits of Saturated Steel Laminations

TitleLow-Order Dynamic Magnetic Equivalent Circuits of Saturated Steel Laminations
Publication TypeConference Paper
Year of Publication2007
AuthorsDavoudi, A., A. Khaligh, M. Amrhein, P. L. Chapman, and J. Jatskevich
Conference NameVehicle Power and Propulsion Conference, 2007. VPPC 2007. IEEE
Pagination725 -729
Date Publishedsep.
Keywordseddy current losses, electric machines, hardware measurements, laminated magnetic devices, laminations, linear order-reduction techniques, low-order dynamic magnetic equivalent circuits, magnetic circuits, nonlinear order-reduction techniques, reduced order systems, reduced-order system, saturated steel laminations, steel

Physics-based modeling of laminated magnetic devices accurately represents underlying dynamic characteristics. However, these models are hard to formulate, oversimplified with crude approximations, and computationally intensive. In this paper, a high-fidelity magnetic equivalent circuit of steel lamination is set forth based on geometrical and material data. The nonlinearity imposed by saturation is also considered. Automated linear and nonlinear order-reduction techniques are introduced to mathematically extract the essential system dynamics in the desired bandwidth, thus preserving both accuracy and computational efficiency. The resulting reduced-order system is validated with hardware measurements and full-order simulation in both time and frequency domains.


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