Magnetic Properties of Silicon Steel Plate Excited With Distorted Wave Voltage.

Influence of dimension ratio and magnetizing conditions on the ac magnetic properties of tape-wound ring core

“…For the tapewound ring core, which is a basic shape and is used as a magnetic device in various measuring instruments and electrical apparatus, the authors have previously shown the fundamental items of the relations between the core dimension ratio and the ac magnetic properties in the case of basic magnetizing conditions of commercial frequency and sinusoidal voltage [2]. Moreover, we have also reported the relations between the magnetizing conditions and the ac magnetic properties for excitation by a distorted-wave voltage [3]. In this paper, we will describe, for the tape-wound ring core using directional silicon steel plate, the results of obtaining the ac magnetic properties considering the influence of the magnetizing conditions and the core dimension ratio and of studying the relations between the magnetic properties of the raw materials and the iron core [4].…”

“…These coefficients differ depending on the material and thickness of the iron plate and are determined here by the experiments as follows [3]. Table 1 shows the specifications of a tape-wound ring core having inner diameter D i , outer diameter D o , height h, effective cross-sectional area A, average magnetic circuit length l, and provided with a coil having N number of turns.…”

“…When the frequency becomes higher, the waveform factor decreases, particularly remarkable on the outer diameter side. This may be due to the facts that the influence of the eddy current becomes larger when the frequency is higher and the distortion of the exciting current waveform becomes smaller as well as that on the outer diameter side, when the induced electromotive force of each layer contains the harmonics, the eddy current will also contain the harmonics and this acts in a way to reduce the waveform factor of the induced electromotive force of this layer [3]. Moreover, when the frequency becomes higher, the ratio of the eddy current loss increases, and since the eddy current loss depends on the waveform factor of the induced electromotive force, the difference in iron loss due to core position becomes larger.…”

Modeling of Nonlinear Magnetizing Characteristics of Pole Transformer for Analyzing Islanding Prevention of Photovoltaic System

“…(H ck cos kωt + H sk sin kωt), (5) where H h is the magnetic field strength due to the dc hysteresis properties, H e is the magnetic field strength due to eddy currents, and H ck and H sk are the k-th Fourier coefficients of H . Using the phase angle φ given by Eq.…”

Influence of magnetization characteristics of materials on the iron loss of wound‐core‐type three‐phase transformers

“…1. Below, 27P110 is considered as the core material [5]. Figure 2 shows the measured harmonics of the magnetic field strength H; the measurements were made in the presence of sinusoidal flux condition, with the maximum flux density fixed at B m = 1.5 T, while varying the frequency f. As can be seen from the diagram, only the component H c1 g (in-phase with the fundamental wave voltage) increases almost directly with the frequency, while the other components remain nearly unchanged.…”