High-field surface trap evaluation system

Abstract

The embodiment of the invention discloses a high-field surface trap evaluation system. The system comprises an upper electrode plate, a lower electrode plate, a temperature control cavity, an electrode circuit, a temperature probe and a temperature detection device; the upper electrode plate and the lower electrode plate are oppositely arranged in the temperature control cavity, and the space between the upper electrode plate and the lower electrode plate is used for placing samples; a temperature control device is arranged inside the temperature control cavity; the electrode circuit comprises a power supply, a first switch, a second switch and an ammeter; one end of the power supply is connected with one end of the first switch, and the other end of the first switch is connected with the upper electrode plate; the other end of the power supply is connected with the lower electrode plate and one end of the ammeter separately; one end of the second switch is connected with the other end of the ammeter, and the other end of the second switch is connected with the other end of the first switch; the temperature probe is connected with the temperature detection device and located in the temperature control cavity. According to the high-field surface trap evaluation system, the variation rules of the trap characteristics of the samples in a high field can be learned to study the trap characteristics of dielectric materials in the high filed.

Description

technical field [0001] The invention relates to the field of performance testing of insulating materials, in particular to a high-field surface trap evaluation system. Background technique [0002] Dielectric materials are widely used in mechanical, electrical, aerospace, military and many other fields. Under the action of an electric field, the dielectric material will exhibit different properties, and when the electric field increases, its characteristic changes will be more obvious. For example, some dielectric materials (such as zinc oxide, silicon carbide, etc.) will show nonlinearity under high field characteristics, the leakage current will increase nonlinearly with the applied electric field; for most materials, when the electric field increases, the insulation resistance will show weak nonlinear characteristics; and the charge injected under different field strengths , its dissipation process will also be different after power off, which depends largely on its inte...

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Problems solved by technology

[0004] This application provides a high-field surface trap evaluation system to solve the problem that the existing trap energy level measurement equipment can only obtain the trap energy level distribution under low field and cannot know the trap energy level distribution of thick materials that are difficult to cut. The problem of changing law of characteristics under high field

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