Summary
This is the second publication of a series authors have been preparing. This paper addresses the challenges and intricacies in creating technical specifications for rewinds or new rotating electrical machines, particularly in the context of windings design and its impacts on the performance of the insulation systems. Reference [1] is the first publication of the series.
Read more Read lessThe paper elaborates on the concepts of Electrical Insulation Systems and Electrical Insulating
Materials, highlighting their distinct thermal classifications as defined by standards. It explores the importance of understanding service stresses on stator windings to ensure resilience.
Impregnation methods such as Resin Rich, Single Vacuum and Pressure Impregnation, and
Global Vacuum and Pressure impregnation are analyzed, with a focus on their particularities.
Additionally, key aspects of stator winding design are clarified, explaining differences between full-loop coils and Roebel bars, discussing the interturn insulation in addition. Groundwall insulation tapes, including polyester-mica and glass-mica tapes, are evaluated regarding market misconceptions. Electrical stress impacts on insulation systems are also explored, as well as slot packing and wedging methods for securing and grounding coils. The importance of robust endwinding retention is, as well, emphasized, to address mechanical and dielectric challenges.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | A1_10782_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | Brazil |
| Study committees | |
| File size | 936 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
SPEZIA Fernando R. - WEG Brazil; GONÇALVES Camila S. - WEG Brazil; DORIGON Julio A. - WEG Brazil
Keywords
Insulation systems, stator windings, specification guidelines, reliability
