Effects of Magnetic Anisotropy on the Performance of Electrical Machines
No Thumbnail Available
Sähkötekniikan korkeakoulu | Master's thesis
Electrical Power and Energy Engineering
AEE - Master’s Programme in Automation and Electrical Engineering (TS2013)
AbstractElectrical steel sheets used in the magnetic cores of electrical machines have non-grain oriented material and their magnetic properties are anisotropic in nature. This anisotropic behaviour plays an important part in the performance characteristic of the machines. It is vital to understand this behaviour and develop magnetic anisotropic models to include the effects of anisotropy in the design phase of the electrical machines. In this Master's thesis, four anisotropy models are presented. The models are developed by utilizing unidirectional measurements data for different directions with respect to the rolling direction of the electrical sheet. The implementation of the models developed are performed by using the 2D finite element method. A simple ring core model is used to show the effects of magnetic anisotropy at different points. The results show that the magnetic flux density has different values with respect to the position of the points in the ring core. The conclusions of this work provides a better understanding of the different ways to model magnetic anisotropy.
Thesis advisorUpadhaya, Brijesh
magnetic anisotropy, electrical machines, electrical steel, material modelling