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Tan delta control method of thin-film capacitor thermal shock test

A film capacitance and control method technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as peeling, melting, and thermal shock test difficulties, and achieve the effect of reducing tanδ

Inactive Publication Date: 2014-07-30
扬州日精电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the automotive industry, smoothing capacitors and filter capacitors used in automobiles have begun to tend to use film capacitors, basically using tan δ (tan δ is the dielectric loss tangent, which means that the dielectric converts electrical energy into heat energy per unit volume per unit time) The energy consumed, δ is the dielectric loss angle) is low, and the ripple current is a polypropylene film capacitor, but the polypropylene film capacitor will shrink at about 135°C and will melt at 160°C. During the thermal shock test, the polypropylene film capacitor The thermal shrinkage of the thin film of the capacitor and the metallization are different, and there will be peeling between the layers, and therefore it is difficult to complete the thermal shock test

Method used

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  • Tan delta control method of thin-film capacitor thermal shock test
  • Tan delta control method of thin-film capacitor thermal shock test
  • Tan delta control method of thin-film capacitor thermal shock test

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Embodiment 1

[0020] Embodiment 1: the thin film of thin film capacitor is carried out metal spraying, the metal that sprays plating and the evaporated metal on thin film capacitor are the same as metal Al, and this thin film capacitor is carried out thermal shock test, test process is to dielectric loss tangent, Electrostatic capacity and insulation resistance are detected, and the obtained detection data is compared with the original condition thermal shock test data and the temperature thermal shock test data, and the following data chart is obtained:

[0021] like figure 1 As shown, there are three control methods for the thermal shock test. In the thermal shock metal spraying change control method, that is, the metal sprayed and the evaporated metal on the film capacitor are set to the same metal, and the dielectric loss angle The tangent change rate is small and the performance is the most stable;

[0022] like figure 2 As shown, there are three control methods for the thermal shoc...

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Abstract

The invention relates to a tan delta control method of a thin-film capacitor thermal shock test. The method includes the steps that a thin film of a thin film capacitor is subjected to metal spraying, and the thermal shock test is carried out on the thin film capacitor subjected to metal spraying. Compared with the prior art, increase of tan delta can be controlled in the thin-film capacitor thermal shock test.

Description

technical field [0001] The invention relates to a thin-film capacitance thermal shock test, in particular to a tan delta control method for the thin-film capacitance thermal shock test. Background technique [0002] In the automotive industry, smoothing capacitors and filter capacitors used in automobiles have begun to tend to use film capacitors, basically using tan δ (tan δ is the dielectric loss tangent, which means that the dielectric converts electrical energy into heat energy per unit volume per unit time) The energy consumed, δ is the dielectric loss angle) is low, and the ripple current is a polypropylene film capacitor, but the polypropylene film capacitor will shrink at about 135°C and will melt at 160°C. During the thermal shock test, the polypropylene film capacitor The thermal shrinkage of the thin film of the capacitor is different from that of the metallization, and peeling will occur between the layers, and it is therefore difficult to complete the thermal sh...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 陈重生
Owner 扬州日精电子有限公司