Ac 토토 후기 properties measurement under 토토 후기 induction waveforms …

Under standard measurement conditions, the 토토 후기 properties of electrical steel is to be measured only under the condition of sinusoidal waveform of the 토토 후기 polarization. However the actual 토토 후기 polarization waveforms of the electric machine are almost always not sinusoidal because of the material behavior (anisotropy, non-linear B-H performance in high polarization regions such as the stator tooth of electrical machines), because of PWM modulated voltage for variable speed motors and because of the layout of the 토토 후기 circuit and the winding scheme (tooth harmonics). 토토 후기 properties obtained by the standard method are not really applicable to an actual electrical machine design because the 토토 후기 properties of ferro토토 후기 material cannot be predicted easily due to non-linear and hysteresis effects, but these higher harmonic polarizations bring about a large increase in 토토 후기 loss. This seminar reviews methods for measurement of the 토토 후기 properties of electrical steels under the condition of 토토 후기 polarization which include higher harmonic components, and analysis and prediction of their 토토 후기 properties.