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Verification of Iron Loss Calculation Method Using a High‐Precision Iron Loss Analyzer
Author(s) -
Shimizu Toshihisa,
Kakazu Keisuke,
Takano Koushi,
Ishii Hitoshi
Publication year - 2015
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.22557
Subject(s) - inductor , power loss , duty cycle , spectrum analyzer , insertion loss , filter (signal processing) , miniaturization , materials science , power (physics) , pulse width modulation , control theory (sociology) , computer science , physics , voltage , engineering , electrical engineering , optoelectronics , control (management) , quantum mechanics , artificial intelligence , nanotechnology
SUMMARY Because of the improved performance of power devices, the volume of the ac filter inductors used in high‐frequency PWM inverters has been reduced. However, the temperature rise in the filter inductor due to this miniaturization has become more pronounced. Therefore, we have proposed an iron loss calculation method for the ac filter inductor. However, the accuracy of the value calculated via the loss map method cannot be verified, because the iron loss arising during each switching period cannot be measured with conventional power measuring instruments. In order to resolve this problem, we developed an inductor loss analyzer (ILA), which allows precise measurement of the iron loss in the inductor during each switching period. The accuracy of the calculation of iron loss in the filter inductor by the loss map method was verified with the ILA. We found that the value calculated by the loss map method differed slightly from the value measured with the ILA. However, these differences can be reduced if we take into account the accurate flux density calculation and the effect of the duty ratio of PWM pulses on the loss. Finally, we verified that the loss map method can provide accurate iron loss calculations.