Compatibility of alternative refrigerants with varnished magnet wire

R. Doerr, S. Kujak
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引用次数: 1

Abstract

The compatibility of 24 motor materials with 11 pure refrigerants and 17 refrigerant-lubricant combinations has been determined. A summary of the effect of refrigerants on varnished magnet wire is presented. The greatest effect on the motor materials is caused by absorption followed by desorption of refrigerants at higher temperatures. The high internal pressure of the absorbed refrigerants and the tendency of these refrigerants to evolve from the materials results in blisters, cracks and internal bubbles in the varnish and magnet wire insulation. The degradation of the insulation results in changes in the bond, dielectric and burnout strength of the varnished magnet wire. Desorption of HCFC-22, and to a lesser extent HFC-32, HFC-134 and HFC-152a, has the greatest effect on insulation integrity. Of the refrigerants tested, exposure to HCFC-22 produces the most deleterious effects on the magnet wire insulation and varnishes.
替代制冷剂与涂漆磁线的兼容性
已经确定了24种电机材料与11种纯制冷剂和17种制冷剂-润滑剂组合的相容性。综述了制冷剂对漆包线的影响。对电机材料的最大影响是由制冷剂在较高温度下的吸收和解吸引起的。被吸收的制冷剂的高内压以及这些制冷剂从材料中逸出的趋势导致清漆和磁线绝缘中的水泡、裂纹和内部气泡。绝缘性的退化导致漆膜磁线的结合强度、介电强度和燃尽强度的变化。对保温完整性影响最大的是HCFC-22解吸,其次是HFC-32、HFC-134和HFC-152a解吸。在测试的制冷剂中,接触HCFC-22对磁线绝缘和清漆产生的有害影响最大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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