| Popis: |
The aim of the paper is to present a simple but well applicable development, to generate the waveform of the magnetic ∞ux density, and so the magnetic hysteresis, for any signal frequency. The proposed approach is based on the knowledge of the signal spectrum for one given frequency. It allows to construct the spectrum for any other frequency. Then, the constructed signal is transformed back to the time domain. Studying in detail the electromagnetic or electromechanical phenomena in electromagnetic devices, like electrical machines, actuators, sensors, often results in solving Maxwell's equations. The performance of electromagnetic devices may be strongly related to the behavior of the magnetic materials of which they are constructed. Therefore, the development of solution techniques of Maxwell's equations in materials with complex constitutive relations, in addition to the experimental identiflcation of the magnetic and magneto-elastic behavior of ferromagnetic materials, become important issues. The hysteresis is in the heart of the magnetic behavior of materials. All the applications concerning the flelds of electrical engineering are strongly related to the particular aspects of magnetic hysteresis. The interest carried to hysteresis is not only due to a technological urgency but also to the need for the comprehension of the physical mechanism responsible of this phenomenon. |
