1. Experimental study on the magnetic permeability of inclusion filled soft polymeric composite for soft-core transformer applications.
- Author
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Hu, Xiaocheng, Liang, Zipeng, Li, Qiyang, Hu, Sideng, and Qu, Shaoxing
- Subjects
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MAGNETIC permeability , *POLYMERIC composites , *MAGNETIC materials , *SKIN effect , *COMPOSITE materials , *DYNAMIC testing - Abstract
The magnetic permeability of three kinds of inclusions (Carbonyl iron, Ferroferric oxide, NiFe-alloy) filled polymer (Polydimethylsiloxane) is investigated at room temperature by using a Buck circuit for the dynamic test and vibrating sample magnetometer (VSM) for the static test. Unlike the traditional measurement method using an impedance analyzer, the self-built circuit can generate a maximum test current of ampere amplitude over high frequencies to simulate the transformer's operation status. The present work considers the effects of inclusion content (from 0 VOL.% to 33 VOL.%) and testing frequencies(100 kHz-1MHz). The experimental results of permeability are compared with the theoretical predictions in the previous works. Three main conclusions can be drawn: First, the magnetic permeability increases with the inclusion addition; Second, as the testing frequency increases, the permeability of the composite material maintains constant, showing no evident dependence on the testing frequency; Third, type of magnetic inclusion will gently affect the permeability of the composite material. This work systematically investigated the permeability of polymer-based magnetic materials, and the results are helpful for the soft-core transformer application of magnetoactive elastomers. • Permeability of magnetic inclusions filled polymer exhibits neglectable variation to the test frequencies (100 kHz-1MHz). • CIP filled polymer is a potential composite material to be used for soft-core transformer applications. • Skin effect must be taken into consideration in high frequency applications. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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