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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29110


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10008399
Improvement of GVPI Insulation System Characteristics by Curing Process Modification
Authors:
Abstract:
The curing process of insulation system for electrical machines plays a determinative role for its durability and reliability. Polar structure of insulating resin molecules and used filler of insulation system can be taken as an occasion to leverage it to enhance overall characteristics of insulation system, mechanically and electrically. The curing process regime for insulating system plays an important role for its mechanical and electrical characteristics by arranging the polymerization of chain structure for resin. In this research, the effect of electrical field application on in-curing insulating system for Global Vacuum Pressurized Impregnation (GVPI) system for traction motor was considered by performing the dissipation factor, polarization and de-polarization current (PDC) and voltage endurance (aging) measurements on sample test objects. Outcome results depicted obvious improvement in mechanical strength of the insulation system as well as higher electrical characteristics with routing and long-time (aging) electrical tests. Coming together, polarization of insulation system during curing process would enhance the machine life time. 
Digital Object Identifier (DOI):

References:

[1] James E. Timperley, Beant S. Nindra, “Evaluation of Epoxy VPI Insulation for High Voltage Stator Winding”, IEEE International Symposium on Electrical Insulation, April 2000.
[2] Satoshi Kinoshita, Masahiro Kozako, Masayuki Hikita, Toshikatsu Tanaka, “Effect of Electric Field Application During Curing Process on Thermal Conductivity of Epoxy Composite Materials with Low Content Inorganic Particles”, 978-1-4673-1252-3, IEEE 2012.
[3] IEEE Std. 95-2002, “IEEE Recommended Practice for Insulation Testing of AC Electric Machinery (2300 V and Above) With High Direct Voltage”, 2002.
[4] IEEE Std. 43-2000, “Recommended Practice for Testing Insulation Resistance of Electric Machinery”, 2000.
[5] M. Shadmand, H. M. Goudarzi, S. Kazemi, “PDC Characteristics of Modern Stator Insulation Systems”, ICPADM2015, Australia-Sydney, 2015.
[6] “IEEE Recommended Practice for Voltage-Endurance Testing of Form-Wound Bars and Coils”, IEEE 1043.
[7] “KEMA Specification for Air-Cooled a. c. Generators of 10MVA and above”, KEMA S-13.

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