A new field-sensing method to measure the power loss of electrical steel sheet under two-dimensional measuring conditions

Birkfeld, M.; Hempel, K. A.

doi:10.1109/20.539284

Cited by 1 publication

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“…The core loss calculation is derived from measurements conducted with various lengths of the air gap in the core and without any samples inserted. Figure 2 shows the results of six measurements (closed core and air gaps of 3,6,8,10, and 15 mm) as a function of average values of flux densities obtained from all 10 measuring coils ( Figure 1). The core losses are obtained by subtracting the winding losses from the total losses measured at the winding terminals.…”

Section: Experimental Determinationmentioning

confidence: 99%

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Determination of electromagnetic properties of steel for prediction of stray losses in power transformers

Štrac¹,

Žarko²

2015

Turk J Elec Eng & Comp Sci

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This paper introduces a method for determination of equivalent linear electromagnetic parameters (constant complex permeability and electrical conductivity) of nonlinear magnetic steel, which can be used in a time-harmonic finite-element simulation to yield the same losses in the volume of that material as the measured ones. The conductivity and the static hysteresis loop of the steel have been measured, from which complex permeability as a function of flux density has been extracted. The indirect measurement of losses in various samples of nonmagnetic and magnetic steel has been carried out using a physical model of a transformer core with a coil. The 3D model of the core has been made with finite-element software and combining it with evolutionary optimization the equivalent constant complex permeability and conductivity of each sample have been found, which yield the equality of measured and calculated losses in the sample. Thus, calculated equivalent material parameters have been implemented in 3 finite-element models of transformers of various power ratings in order to determine the share of hysteresis losses in the total amount of losses in structural parts of transformers. The results have been compared with the measurement and the reasons for discrepancies have been explained.

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Section: Experimental Determinationmentioning

confidence: 99%

“…There is also a possibility for measuring the losses in various parts of a transformer by using the Poynting vector directly [6]. The advantage of this method is the usage of sensors built from small cube-shaped samples of the same material as the material of the object inside the transformer where the losses should be determined.…”

Section: Introductionmentioning

confidence: 99%

Determination of electromagnetic properties of steel for prediction of stray losses in power transformers

Štrac¹,

Žarko²

2015

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

show abstract

A new field-sensing method to measure the power loss of electrical steel sheet under two-dimensional measuring conditions

Cited by 1 publication

References 0 publications

Determination of electromagnetic properties of steel for prediction of stray losses in power transformers

Determination of electromagnetic properties of steel for prediction of stray losses in power transformers

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