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The research on nanofluids has shown important improvements of the electrical performance, but so far the attention has only been focused on their use in transformers. The target of this work is to understand if nanofluids can be applied as insulators for power electronics modules, where the major stresses are caused by square waves or PWM voltages. Breakdown events in non-uniform field conditions...
A recent investigation on the DC stability of nanofluids has revealed some interesting phenomena regarding the polarization current; some unexpected slow peaks appeared after the voltage reached a precise value. In this work we have deepened and analyzed the possible mechanisms which could cause such experimental results. While in low concentration nanofluids a charge trapping mechanism seems to be...
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