Water-cooled stator windings copper oxide issues

摘要

Direct water cooling of stator windings has been common since the early 1960s. In general these windings have performed well, although as would be expected in any liquid system involving many varied components, there have been problems with leaks, leaks both large and small, and copper oxide build-up. This paper will briefly summarize some basic stator winding design, operation and monitoring considerations relating to water cooling, and will then discuss in some detail parameters relating to oxide buildup and removal.