NDLI: Partial discharge inception voltage of enamel twisted-pair samples with several laminated insulation layers

Content Provider	IEEE Xplore Digital Library
Author	Nakaya, H. Kozako, M. Hikita, M. Ohya, M. Muto, D. Tomizawa, K.
Copyright Year	2013
Abstract	It is needed for the insulation system of inverter-fed motors used for industrial motors and electric vehicle to have high partial discharge inception voltage (PDIV). In this paper PDIV test was performed on twisted pair specimens of enameled wires consisting of polyamide-imide resin and polyester-imide resin alternately-layered. PDIV characteristics of the twisted pair specimens were measured by applying AC voltage at 60Hz and bipolar repetitive impulse voltage simulating inverter surge that appears in inverter-fed motor insulation system. The repetitive impulse voltage, the rise time, pulse width, repetition frequency, and rise rate of voltage of the repetitive voltage impulse were 200 ns, 1 ms, 500 Hz, and 500 V/min, respectively. For ac voltage at 60 Hz. The rise rate of ac voltage was 15 V/s. Twelve experiments for ac test were made with an interval of 10 s. The PDIV was also estimated using electric field analysis for the twisted pair on the basis of Paschen's law to the air gap formed between the two enamel wires. We fabricate enamel wire with the different permittivity materials alternately-layered. It was found that PDIV of the sample with the lower permittivity material as a single layer is larger than that with the higher permittivity one. On the other hand, it was also found that PDIV of the sample with the layered insulation almost does not change.
Sponsorship	IEEE Dielectr. Electr. Insul. Soc.
Starting Page	1270
Ending Page	1273
File Size	2130628
Page Count	4
File Format	PDF
ISBN	9781479925971
DOI	10.1109/CEIDP.2013.6748158
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-10-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Voltage measurement Insulation Materials Wires Electric fields Capacitance
Content Type	Text
Resource Type	Article

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