Improved methodology for power loss measurements in power electronic switches using digital oscilloscope and MATLAB

Marinov, Angel; Valchev, Vencislav Cekov

doi:10.1109/epepemc.2010.5606862

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…In accordance with the (3) and (5) by reducing the value of y the increase coefficient K R (j) = R ac (j) /R dc (j) is also reduced. In the case of the secondary winding made with copper tape with a thickness h = 0.5 mm, at a frequency f = 100 kHz, due to the reduction of coefficient K R (j) ,with increasing temperature the resistance of R ac (2) decreases. For a frequency f =500 kHz, this effect is no longer present (Fig.…”

Section: Comparison Of the Measurements And Calculationsmentioning

confidence: 99%

“…There are various methods for power loss measurement, which are based on current and voltage scope records [2,3]. However, they are characterized by low accuracy and have a few measurement errors resulting from probe delays and large variations in voltage and current levels.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3]). This is a very important issue for improving the power density factor and power converter miniaturization.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of power losses in a high-frequency planar transformer using a thermal camera

Barlik¹,

Nowak²,

Grzejszczak³

et al. 2016

Archives of Electrical Engineering

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This paper presents the implementation of a thermal camera for the quantitative estimation of power losses in a high frequency planar transformer (100 kHz/ 5600 VA). The methodology is based on the observation of the transient temperature rise and determination of the power losses by means of curves representing the derivative of temperature as a function of power losses dissipated in the transformer. First, the thermal calibration characteristics had to be obtained from a simple experiment, where power losses are generated by DC current in the ferrite core and windings. Next, experimental investigations focused on the determination of the transformer power losses for a short circuit and no load, with a resistive load and with the rectifier as a load were carried out. Finally, to verify the obtained results, analytical calculations based on Dowell's and modified Steinmetz's equations were additionally made, which showed a good convergence. The proposed method is easy to implement and can be used as an alternative to the calorimetric method which is time-consuming and requires a complicated measurement setup.

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Section: Comparison Of the Measurements And Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%