No abstract

No abstract

The relationship between impregnation process and winding temperature has not been analyzed in detail yet. Therefore, one purpose of this paper is to investigate the correlation between impregnation process, resin absorption, applied resin, and thermal behavior. Apart from thermal behavior, it has to be ensured that the lifetime of the manufactured electrical machines still meets industrial specifications. The lifetime is primarily affected by the quality of the insulation system. So the second purpose of this paper is to investigate the influence of the named aspects on the lifetime of an electrical machine.

No abstract

Ideally, improvements of the manufacturing process do not cause deteriorations of the product characteristics. Pre-wound coils for electrical machines with concentrated windings are such an improvement. The easiest way to enable the assembling of pre-wound coils is simply the absence of pole shoes. This paper discusses the absence of pole shoes based on a sample machine. The focus lies on changes of cogging, avg. nominal and peak torque and the occurring torque ripple. Furthermore, different technologies as a variation of the tooth thickness, skewing, magnetic slot wedges and plug-in connections are investigated to compensate deteriorations of torque behavior. In addition, the effects of these technologies on the manufacturing process of a stator are discussed.