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Polyimide (PI) is a widely used wiring insulation material for aircraft. Given the harsh environment of its employment, wiring insulation material for aircraft suffers from various degradation processes which may cause failure of electrical insulation. In this paper, the dielectric response of PI to thermal degradation and to saline exposure is investigated. To investigate the effect of thermal exposure,...
The text researched the insulation work of fiberglass frame when it supports in favor of temperature difference. According to the require, we designed and calculation the insulating work layer thickness size h of the fiberglass frame member. Adopting finite element analysis, we calculated the thermal field in temperature difference inside and outside the fiberglass frame member, analyzing the property...
The working life of electrical machines is primary affected by the insulation system quality. Diagnostics methods help to understand the momentary state of insulation and to avoid the possible damage or electrical breakdown of machines through the repair or insulation rewinding. Partial discharges testing belongs to one of the high applicable test method of insulating materials within electrical machines...
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