Three-phase Induction Motor Model Core Research Articles

Evaluation of Vector Magnetic Property in a Three-Phase Induction Motor Model Core with Visualization of Streamline

In this paper, a streamline display method for magnetic flux density and magnetic field strength vectors in a three-phase induction motor model core is presented, and the relationship between streamlines and magnetic properties is investigated. It is possible to visualize the vector magnetic properties distribution by representing the magnetic flux density and the magnetic field strength vector with the streamlines. In addition, the time variation of the streamlines of the magnetic flux density and magnetic field strength vectors, and magnetic energy was compared. It was clear that the magnetic energy did not necessarily increase in the areas where the magnetic flux density and magnetic field strength increased because these vectors have the spatial phase difference.

Alternating and Rotating Core Loss Characteristics in Three-phase Induction Motor Model Core under High-frequency Excitation Conditions

Alternating and Rotating Core Loss Characteristics in Three-phase Induction Motor Model Core under High-frequency Excitation Conditions

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

This paper presents distributions of the local vector magnetic properties in a three-phase induction motor model core measured with a new vector hysteresis sensor (V-H sensor). The exciting conditions used in the measurements were common sinusoidal and PWM excitation. The influence of the modulation frequency on vector magnetic properties is made clear.

Distribution on localized two‐dimensional magnetic properties of three‐phase induction motor core

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 actual cores are still not understood fully. On the other hand, there is understanding of the two-dimensional magnetic property, that is, the relationship between the magnetic field strength vector H and the magnetic flux density vector B, which are not usually parallel but have a phase angle. Therefore, local magnetic properties in an actual constructed core should be measured as a vector relation. This paper presents the local magnetic properties in a three-phase induction motor model core, which are measured with a two-dimensional measurement sensor. © 2000 Scripta Technica, Electr Eng Jpn, 133(4): 34–40, 2000

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

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.

Distribution on localized two-dimensional magnetic properties of three-phase induction motor core

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 actual cores are still not understood fully. On the other hand, there is understanding of the two-dimensional magnetic property, that is, the relationship between the magnetic field strength vector H and the magnetic flux density vector B, which are not usually parallel but have a phase angle. Therefore, local magnetic properties in an actual constructed core should be measured as a vector relation. This paper presents the local magnetic properties in a three-phase induction motor model core, which are measured with a two-dimensional measurement sensor. © 2000 Scripta Technica, Electr Eng Jpn, 133(4): 34–40, 2000

Ｅ＆Ｓモデルを用いた誘導電動機の磁界解析

We present magnetic field analysis using the E&S model and calculations of iron loss for a three-phase induction motor model core. The E&S model can express two-dimensional magnetic properties. This model shows better properties than does the conventional method, and this model can express both alternating and rotating flux conditions. It therefore can be said that using this model for magnetic field analysis is very useful, permitting evaluation of iron loss distribution.

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

Efficiency improvement of electrical machines, is a very important problem. However the local magnetic properties in core materials have not yet understood fully. On the other hand, the concept of the two-dimensional magnetic property has been reported. It means the relationship between the magnetic field strength vector H and the flux density vector B. They are not usually parallel but have a phase angle in space. This paper presents the measured local vector-magnetic properties in a three-phase induction motor model core.

The influence of compressive stress on the magnetic flux density in the three-phase induction motor core model

The magnetic properties are very sensitive to stress acting on practical constructed cores. However the influence has been not yet fully investigated for real cores, because the estimation of the distribution of stress is very difficult. In this paper, the local properties in the three-phase induction motor model core under compressive stress have been measured to investigate its influence in detail. The result shows that the compressive stress will cause slight enlargement of the rotational iron losses.

Improved magnetic field analysis of induction motor models

In the analysis with the conventional numerical modeling of magnetic materials, the vector relations between the flux density and the field intensity under a rotating field cannot be expressed exactly. In this paper, we derived the tensor magnetic reluctivity from the data measured with two-dimensional measurement method. This expression is applied to analyze a three-phase induction motor model core. The examples show that the calculated results obtained by our new method are different from those of conventional modeling.

Distribution of the Loss in a Three Phase-Induction Motor Model for Two-Dimensional Magnetic Measurement

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

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

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 H-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.