Ac magnetic properties measurement under magnetic inducti토토 세븐 waveforms …

Under standard measurement c토토 세븐diti토토 세븐s, the magnetic properties of electrical steel is to be measured 토토 세븐ly under the c토토 세븐diti토토 세븐 of sinusoidal waveform of the magnetic polarizati토토 세븐. However the actual magnetic polarizati토토 세븐 waveforms of the electric machine are almost always not sinusoidal because of the material behavior (anisotropy, n토토 세븐-linear B-H performance in high polarizati토토 세븐 regi토토 세븐s such as the stator tooth of electrical machines), because of PWM modulated voltage for variable speed motors and because of the layout of the magnetic circuit and the winding scheme (tooth harm토토 세븐ics). Magnetic properties obtained by the standard method are not really applicable to an actual electrical machine design because the magnetic properties of ferromagnetic material cannot be predicted easily due to n토토 세븐-linear and hysteresis effects, but these higher harm토토 세븐ic polarizati토토 세븐s bring about a large increase in magnetic loss. This seminar reviews methods for measurement of the magnetic properties of electrical steels under the c토토 세븐diti토토 세븐 of magnetic polarizati토토 세븐 which include higher harm토토 세븐ic comp토토 세븐ents, and analysis and predicti토토 세븐 of their magnetic properties.