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.
Received 09 November 2012Accepted 10 December 2012Published online 20 March 2013
Article outline: I. INTRODUCTION II. EXPERIMENTAL METHODS AND PROCEDURE III. THE IEM-FORMULA IV. SEMI-PHYSICAL PARAMETER IDENTIFICATION A. Classical Foucault losses B. Hysteresis losses C. Excess losses D. Non-linear (saturation) losses V. COMPARISON TO MEASUREMENTS VI. CONCLUSIONS
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