Titlebook: Electric Charge Accumulation in Dielectrics: Measurement and Analysis; Tatsuo Takada,Hanwen Ren,Qingmin Li Book 2022 Science Press 2022 El

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Q(t) Data of Various Polymer MaterialsThe dependence of charge accumulation characteristics of various polymer materials on applied electric fields and temperatures is evaluated by Q(t) measurement.

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Application to Insulation DiagnosisThe charge accumulation of DC insulating materials has been evaluated by the PEA method in flat samples (sheet samples).

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PEA Method: Pulsed Electro-Acoustic MethodFigure?8.1 shows the principle of the PEA method to measure the accumulated charge distribution.

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Generation of Pulse Pressure WaveWhen a DC voltage . is applied to the dielectric without charge accumulation as shown in Fig.?., .(0) and .(.) are induced on the electrode surfaces.

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Basics of Electrodynamics and Elastic MechanicsThe measurement results of the space charge distribution by the PEA method have been introduced in the above chapters.

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Examples of PEA Measurement ResultsFigure?.a: Positive DC electric field of +300?kV/mm is applied to a PE sample (with a?thickness?of 150?μm).

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