Analysis of Partial Discharges and Failure Mechanism in Electrical Machines with Hairpin Winding

The Insulation Resilience of Inverter-Fed Low Voltage Traction Machines: Review, Challenges, and Opportunities

“…Therefore, most publications deal with the study of the insulation issue on wire pairs [3], [44]- [46], [49], [68], [77], [79], [89]. In contrast, there are very few contributions dealing with flat wire/hairpin windings [90]- [94]. In addition, the entire insulation difficulty is extremely parameter sensitive in all domains, including the decisive electrostatic field distribution resulting from the geometry, as exemplified in Fig.…”

“…In the context of investigations on LV machines, imitations of the insulation system in the form of wire pairs according to the standard IEC60851-5 [48], so-called motorettes/formettes (single-or three-phase) [90], [92], [119], [143]- [145] and rarely -due to the associated high costs -complete stators are used as test specimens [119], [146]- [148]. Many contributions concentrate on the component level of the materials used and other manufacturing parameters [44], [47], [91].…”

“…Many contributions concentrate on the component level of the materials used and other manufacturing parameters [44], [47], [91]. Specimens aside from the standard are also motivated [56], [90], [112]. To reduce the statistical sample dispersion, e.g.…”