METHOD FOR DETERMINING A TEMPERATURE IN A WINDING OF SUBCONDUCTORS OF AN ELECTRIC MACHINE

摘要

The invention relates to a method for determining a temperature at a predetermined location in a winding of subconductors (2) of an electric machine, each subconductor being encased in electric subconductor insulation (3), and said method comprising the following steps: predetermining the location between one of the subconductors (2) and the associated subconductor insulation (3); arranging, in said winding, an optical fibre (5) with a sensor material piece (9) that is fixed to the predetermined location, the optical properties of said sensor material piece (9) being temperature-dependent and uninfluenced by stretching; exposing the sensor material piece (9) to light via the optical fibre (5) such that, following an interaction with the sensor material piece (9), light is emitted from said sensor material piece (9); measuring the spectrum of the light; and using this spectrum to determine the temperature at the predetermined location.