Application of the differential calorimeter in magnetic measurements

Conclusions

The calorimetric method of measuring losses in ferromagnetic materials can be used as a control method for checking the accuracy of measuring devices and for checking magnetic characteristics of materials at high frequencies under laboratory conditions (at plants producing magnetic materials) and in research institutes. This method is the most reliable when the voltage or current waveform are distorted, since the measurement results are almost completely independent of frequency.

The differential calorimetric system provides measurements of small losses in ferromagnetic materials at high frequencies with great precision. Measurements of a power greater than 5 mw in a stable state condition and a completely balanced system can be made with an accuracy of the order of ± 1%. The sensitivity at the same time can be sufficiently high (the threshold of sensitivity in our case amounts to approximately 0.005 mv).