Study of ultra-fast space charge in thin dielectric films

Zheng, Feihu; Chen, Lin; Dong, Jianxing; An, Zhenlian; Zhang, Yewen

doi:10.1109/ceidp.2013.6748235

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…According to the space charge phenomena observed by some researchers, it has been calculated that the mobility of rapid charge is nearly 10 −9 m 2 /(Vs) [ 20 , 21 ]. Meanwhile, some measured current results have also indicated that a part of space charge has a large migration speed [ 22 ]. From the analysis based on the results under the DC-superimposed pulsed voltage conditions [ 23 ], the charge inside the sample has been found to increase and decrease instantaneously after the pulsed voltage rises and falls.…”

Section: Discussionmentioning

confidence: 99%

Frequency and Temperature-Dependent Space Charge Characteristics of a Solid Polymer under Unipolar Electrical Stresses of Different Waveforms

Ren

Tanaka

et al. 2021

Polymers

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In this paper, we studied the space charge phenomena of a solid polymer under thermal and electrical stresses with different frequencies and waveforms. By analyzing the parameter selection method of a protection capacitor and resistor, the newly built pulsed electro-acoustic (PEA) system can be used for special electrical stresses under 500 Hz, based on which the charge phenomena are studied in detail under positive and negative DC and half-wave sine and rectangular wave voltages. Experimental results show that the charge accumulated in the polyimide polymer under DC conditions mainly comes from the grounded electrode side, and the amount of charge accumulated with electric field distortion becomes larger in a high-temperature environment. At room temperature, positive charges tend to accumulate in low-frequency conditions under positive rectangular wave voltages, while they easily appear under high-frequency situations of negative ones. In contrast, the maximum electric field distortion and charge accumulation under both half-wave sine voltages occur at 10 Hz. When the measurement temperature increases, the accumulated positive charge decreases, with a more negative charge appearing under rectangular wave voltages, while a more positive charge accumulates at different frequencies of half-wave sine voltages. Therefore, our study of the charge characteristics under different voltage and temperature conditions can provide a reference for applications in the corresponding environments.

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Section: Discussionmentioning

confidence: 99%

Frequency and Temperature-Dependent Space Charge Characteristics of a Solid Polymer under Unipolar Electrical Stresses of Different Waveforms

Ren

Tanaka

et al. 2021

Polymers

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show abstract

“…It is found that when the pulsed voltage transfers between the falling and rising edges, the accumulated charge amount inside the sample decreases or increases sharply. Besides these direct charge measurements, the research based on electric current measurement in [32] also indicates that some parts of space charge can migrate very quickly.…”

Section: Discussionmentioning

confidence: 99%

Effect of sinusoidal waveform and frequency on space charge characteristics of polyimide

et al. 2021

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The charge phenomena under sine and half-wave sine voltages within the frequency range of 500 Hz are studied here. Based on the pulsed electro-acoustic method, the traditional circuit design under high-frequency voltages is first analysed. It is found that the selection of a 186 pF protection capacitor and a 333 kΩ protection resistor can ensure that the actual voltage applied to the sample is consistent with the expected input. Based on this design, experimental results show that the polarity of the charge accumulated in the depth of the sample is determined by that of the upper electrode. Comparison results under special voltages with different amplitudes and frequencies indicate that the amount of accumulated charge under sine voltages are larger than those under positive and negative half-wave sine and DC conditions, and the samples under lower-frequency conditions show more charge accumulation. The maximum electric field strengths appear at 90 and 270 degrees of the sine voltage with a frequency of 10 Hz, and their values are 68.55 and 81.82 kV/mm, respectively. Therefore, the charge characteristics are easily affected by the voltage's waveform and frequency parameters. The results obtained here can provide guidance for the application of insulating materials under special voltage environments.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Space Charge Phenomena inside Solid Insulation under Different Voltage and Temperature Conditions

Ren

Tanaka

et al. 2021

IEEJ Trans. FM

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Study of ultra-fast space charge in thin dielectric films

Cited by 3 publications

References 10 publications

Frequency and Temperature-Dependent Space Charge Characteristics of a Solid Polymer under Unipolar Electrical Stresses of Different Waveforms

Frequency and Temperature-Dependent Space Charge Characteristics of a Solid Polymer under Unipolar Electrical Stresses of Different Waveforms

Effect of sinusoidal waveform and frequency on space charge characteristics of polyimide

Space Charge Phenomena inside Solid Insulation under Different Voltage and Temperature Conditions

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