Detail publikačního výsledku

Power Loss Measurement for Small Closed Material Samples

ZDRAŽIL, L.; ROUBAL, Z.

Original Title

Power Loss Measurement for Small Closed Material Samples

English Title

Power Loss Measurement for Small Closed Material Samples

Type

Paper in proceedings (conference paper)

Original Abstract

When measuring the specific losses on small ferrite cores, high demands are placed on the wattmeter used. Commonly available wattmeter types suitable for 50 Hz frequency do not achieve sufficient sensitivity for ferrite materials for switching power supplies and the measurement uncertainties are too high. For the current channel, it is necessary to achieve very small phase errors and high sensitivity. These demanding requirements are necessary for measurements at low magnetic induction saturation Bmax. The proposed sensitive wattmeter achieves higher gain accuracy for both channels than the oscilloscope solution, while maintaining a high bandwidth of approximately 50 kHz with a measurement uncertainty below 2%. the ability to quickly measure the dependence of specific losses on excitation reduces the error caused by self-heating.

English abstract

When measuring the specific losses on small ferrite cores, high demands are placed on the wattmeter used. Commonly available wattmeter types suitable for 50 Hz frequency do not achieve sufficient sensitivity for ferrite materials for switching power supplies and the measurement uncertainties are too high. For the current channel, it is necessary to achieve very small phase errors and high sensitivity. These demanding requirements are necessary for measurements at low magnetic induction saturation Bmax. The proposed sensitive wattmeter achieves higher gain accuracy for both channels than the oscilloscope solution, while maintaining a high bandwidth of approximately 50 kHz with a measurement uncertainty below 2%. the ability to quickly measure the dependence of specific losses on excitation reduces the error caused by self-heating.

Keywords

soft ferrites, wattmeter, specific losses in ferromagnetics, magnetic measurements

Key words in English

soft ferrites, wattmeter, specific losses in ferromagnetics, magnetic measurements

Authors

ZDRAŽIL, L.; ROUBAL, Z.

RIV year

2024

Released

29.05.2023

ISBN

978-80-972629-6-9

Book

Proceedings of the 14th International Conference on Measurement

Pages from

183

Pages to

186

Pages count

4

URL

https://www.measurement.sk/M2023/doc/Proceedings_M2023.pdf

Full text in the Digital Library

http://hdl.handle.net/

BibTex

@inproceedings{BUT183713,
  author="Lukáš {Zdražil} and Zdeněk {Roubal}",
  title="Power Loss Measurement for Small Closed Material Samples",
  booktitle="Proceedings of the 14th International Conference on Measurement",
  year="2023",
  pages="183--186",
  doi="10.23919/MEASUREMENT59122.2023.10164425",
  isbn="978-80-972629-6-9",
  url="https://www.measurement.sk/M2023/doc/Proceedings_M2023.pdf"
}