Semi-physical parameter identification for an iron-loss formula allowing loss-separation

Abstract

This paper presents a semi-physical parameter identification for a recently proposed enhanced iron-loss formula, the IEM-Formula. Measurements are performed on a standardized Epstein frame by the conventional field-metric method under sinusoidal magnetic flux densities up to high magnitudes and frequencies. Quasi-static losses are identified on the one hand by point-by-point dc-measurements using a flux-meter and on the other hand by extrapolating higher frequency measurements to dc magnetization using the statistical loss-separation theory (Jacobs et al., “Magnetic material optimization for hybrid vehicle PMSM drives,” in Inductica Conference, CD-Rom, Chicago/USA, 2009). Utilizing this material information, possibilities to identify the parameter of the IEM-Formula are analyzed. Along with this, the importance of excess losses in present-day non-grain oriented Fe-Si laminations is investigated. In conclusion, the calculated losses are compared to the measured losses.

Hysteresis Loss Evaluation of Additively Manufactured Soft Magnetic Core

“…At lower material magnetization, the hysteresis losses calculated by the extrapolation method show correlation with the experimental quasi-static losses: with a difference of 22% at 0.8 T and 16% at 1 T magnetization. At higher material magnetization the results diverge considerably: 433 % at 1.25 T and 577% at 1.5 T. The considerable divergence suggests the emergence of nonlinear saturation losses component [20], [21] at deep saturation of the material, requiring higher-order fitting. The hysteresis power loss components of 0.925 W/kg (1 T, 50 Hz) and 2.85 W/kg (1.5 T, 50 Hz) W/kg are comparable to commercial grade materials and other 3D printed soft ferromagnetic materials from the literature.…”

Complete and accurate modular numerical computation scheme for multi‐coupled electric drive systems

“…The IEM formula shows the improvement in loss determination at high magnetic flux densities and high frequencies, due to this fourth loss term with a higher-order B dependence [16]. In various scientific studies, this model has been used to calculate the losses in electrical machines.…”

Mechanical stress distribution and the utilisation of the magneto-elastic effect in electrical machines

“…For this purpose, the unmodified, stress-independent parameters for calculating the iron loss are used. The parameters are identified using the semi-physical approach presented in Steentjes et al (2013). Therefore, measurements at 50 Hz of the electrical steel M400-50A were used.…”