Detection of a missing or missing stator groove wedge in an electric machine

摘要

A method for detecting a wedge (10) of stator groove that is missing or absent in an electric machine, the method comprising the operations of: - measuring a first current from a first machine; - providing a first current spectrum from the measurement of the first current, the high frequency area reaching a high frequency area greater than twice the main frequency; and - use spectrum values of the first current in the high frequency area to determine if a stator groove wedge (10) is missing or not.