Distribution of two-dimensional magnetic properties in three-phase induction motor model core

Abstract

This paper presents the result for the local magnetic properties in a three-phase induction motor model core. The relationship between the magnetic field strength vector H and the magnetic flux density vector B, is obtained through measurements with a special sensor, which utilizes the 11-coil method and the double needle method. As a result, the relationship between the H-vector and the B-vector is made clear, and it is shown that the local properties in an actual core are vectorial in nature.

Measurement of Local Vector Magnetic Properties in Three-Phase Induction Motor Model Core with a Small-Sized Vector Hysteresis Sensor

“…The other is in spatial phase difference between H and B. To make clear the local vector magnetic properties in practical motor cores, we have so far developed vector hysteresis sensors (V-H sensors) based on the H-coil method and the needle probe method [4]. Recently we have developed a new small-sized V-H sensor and enabled more detailed magnetic property measurements in higher resolution.…”

Study on Rotational Hysteresis and Core Loss Under Three-Dimensional Magnetization

“…O EVALUATE three dimensional (3D) magnetic properties and optimize the application of a magnetic material, the B-H hysteresis curves and core losses need to be measured with alternating or rotational magnetic fluxes depending on the application. Experimental apparatus and techniques, such as Epstein Frames and Single Sheet Testers (SST) for measurement of magnetic properties of soft magnetic materials have been developed in the past several decades [1]- [5]. However, in a rotating electrical machine, the direction of the magnetic flux vector varies with time in the 3D space of the magnetic materials.…”

Magnetic characteristic analysis of electrical machines by vector magneto-hysteretic E&S2 model

“…One of the engineering models is "E&S 2 model" and is more useful than other model. In this paper, the formulation of this engineering model was described and applied to numerical simulation of the electrical machines [6][7][8][9].…”