Abstract

Improving material characteristics and optimizing technical designs have been studied from the standpoint of efficiency improvement of electrical machinery and apparatus. Unfortunately, the local magnetic properties in the actual core are still not fully understood. On the other hand, the concept of the two-dimensional (vector) description of the magnetic properties was developed. It means that the description of the relationship between the magnetic field strength vector H and the magnetic flux density vector B which are usually not parallel but have the phase angle, by means of a permeability tensor. In general, the magnetic quantities show not only the non-linearity of amplitude but also a spatially different angular position (we call it spatial-phase angle). Therefore, the local magnetic quantities in an actual constructed core should be measured as vector quantities. This paper presents the local magnetic quantities in a three-phase induction motor model core, which were measured with the two-dimensional measurement sensor.

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