Non-Linear Dielectric Testing at High AC Voltages Using Waveforms and Harmonics
Jan Obrzut, K Kano
Complex impedance and non-linear response was measured for high-dielectric composite films at AC voltages using a waveform technique. With decreasing dielectric thickness, these materials are operating at higher electric fields which cause nonlinear dielectric effects and lead to a time dependent dielectric-breakdown. The waveforms were Fourier transformed from time domain to frequency domain and analyzed at fundamental and higher order harmonic frequencies. It was found that the conventional epoxy resin laminates exhibit an impedance characteristic that is nearly independent on applied electric field, up to the material dielectric break-down. When the electric field approaches near dielectric break-down conditions, the second-order nonlinear dielectric susceptibility decreases abruptly while the third harmonic response dominates non-linear dielectric behavior.In comparison, the impedance of dielectric materials made of organic resins and ferroelectric ceramics decreases continuously with increasing voltage. The non-linear dielectric effect is dominated by the third harmonic response that originates from a polarization reversal of the ferroelectric component. When the electric field approaches near dielectric break-down conditions, again, the second-order nonlinear dielectric susceptibility decreases abruptly.
2005 Annual Report Conference on Electricl Insulation and Dielectric Phenomena
October 16-19, 2005
IEEE Conference on Electrical Insulation and Dielectric Phenomena
and Kano, K.
Non-Linear Dielectric Testing at High AC Voltages Using Waveforms and Harmonics, 2005 Annual Report Conference on Electricl Insulation and Dielectric Phenomena, Nashville, TN, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852537
(Accessed May 28, 2023)