A new method for space charge measurements in dielectric films for power capacitors

Reboul, J.M.; Cherifi, A.; Carin, R.

doi:10.1109/94.959694

Cited by 18 publications

(2 citation statements)

References 6 publications

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“…57 The main difference between the TSM is that employed to have a better resolution using a thermal excitation over a long period of time rather than a single stimulus. 58 As a matter of fact, the thermal excitation brought by the radiating electrode does not give sufficient resolving power for the space charge measurement in thin dielectric films (due to a high number of information lost during the beginning of the transient current).…”

Section: E Alternative Thermal Wave Methods (Atwm)mentioning

confidence: 99%

Contributed Review: Review of thermal methods for space charge measurement

Imburgia

Romano

Caruso

et al. 2016

Review of Scientific Instruments

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Decay of space charge in conjugated polymers measured using pyroelectric current transients J. Appl. Phys. 93, 2884 (2003) The space charge accumulation phenomenon has garnered great interest over the last two decades because of the increased use of direct current in high voltage electrical systems. In this context, a significant relevance has been achieved by the thermal methods, used for solid dielectrics. This paper presents a review of this non-destructive measurement system used for the measurement of space charge. The thermal pulse method, the thermal step method, and the laser intensity modulation method are described. For each configuration, the principle of operation, the thicknesses analyzed, and the spatial resolution are described, reporting also the main related applications. Published by AIP Publishing. [http://dx

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Section: E Alternative Thermal Wave Methods (Atwm)mentioning

confidence: 99%

Contributed Review: Review of thermal methods for space charge measurement

Imburgia

Romano

Caruso

et al. 2016

Review of Scientific Instruments

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“…Several techniques exist [3][4][5][6][7][8][9][10][11] and are able to probe different materials [12][13][14][15][16] with various thicknesses (from a few micrometres to several millimetres). Most of them are based on the physical interaction of an external source (thermal, pressure) with the sample studied by breaking the balance 1 Author to whom correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

Space charge cartography by FLIMM: a three-dimensional approach

Marty-Dessus¹,

Berquez

Petre

et al. 2002

J. Phys. D: Appl. Phys.

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A technique for three-dimensional cartography of space charges profiles inside polymer insulating samples is proposed. Called focused laser intensity modulation method (FLIMM), it is derived from the well-known LIMM method, with an additional possibility of being able to focus the laser spot on the surface of the sample to be studied. The processed data is a short-circuited pyrolectric current collected between the electrodes and induced by the interaction of the charges with the periodic variations of temperature produced by the laser source. The focused aspect of our method requires a good three-dimensional modelling of the spatial evolution of this thermal gradient. Under these conditions, the treatment of the equation of heat propagation is carried out using simultaneously a double Fourier transform and Green functions. In association with the numerical simulations of this solution, a two-dimensional scanning of the beam on polyethylene test sample surfaces shows that one can get three-dimensional representations of space charge shapes with a lateral resolution lower than 10 μm and for a depth of analysis typically included in the range 1–100 μm.

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