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- W2363886110 abstract "In order to study the partial discharge mechanism of polyimide film used in frequency control motor, the electrical conduction current of both DuPont common polyimide film (100HN) and corona-resistant polyimide film (100CR) was measured before and after 8 hours corona-discharge aging under 10 kV/mm and 20 kV/mm. The results show that the electrical conduction current of 100CR is about one order of magnitude larger than that of 100HN. Based on the space charge aging theory, the electrical degradation threshold is 40 kV/mm for 100CR and 35 kV/mm for 100HN before corona-discharge aging and decreases with increasing corona-aged field for the two films, but the electrical degradation threshold of 100CR is higher than that of 100HN in the space charge limited current area, showing that there are more shallow traps in 100CR than that in 100HN. By measuring the depolarization current of the two films at 170 C, it is observed that the space charge magnitude of 100CR is twice larger than that of 100HN and the decay of depolarization current of 100CR is faster than that of 100HN. Results also show that there are more shallow traps in 100CR than those in 100HN. The results just agree with those from the electrical conduction current measurement. Because the electrical degradation threshold is the value of electrical field which space charges are accumulated in insulation and space charge can distort the electrical field distribution, the corona-resistant ability of 100CR is superior to that of 100HN. At the same time, a large quantity of shallow traps can more effectively ameliorate the electrical field distribution of 100 CR than that of 100HN, which can more effectively modifies the resisting corona-discharge ability of 100CR than that of 100HN." @default.
- W2363886110 created "2016-06-24" @default.
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- W2363886110 date "2007-01-01" @default.
- W2363886110 modified "2023-09-25" @default.
- W2363886110 title "Study on Electrical Aging Characteristic of Polyimide Film Used in Frequency Control Motor" @default.
- W2363886110 hasPublicationYear "2007" @default.
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