ROTATING ELECTRICAL MACHINE

摘要

Provided is a rotating electrical machine comprising: a housing; a rotor fixed to a rotating shaft that is rotatably supported by the housing; a stator fixed to the housing so as to enclose the rotor; a slip ring fixed to the rotating shaft; a brush; an impelling means that impels the brush to the slip ring; a temperature data obtaining means that obtains data relating to the temperature of the brush; a rotation data obtaining means that obtains data relating to the rotation angle of the rotating shaft; and a wear amount calculation means. The wear amount calculation means: obtains the brush temperature based on temperature data including the output data from the temperature data obtaining means; uses the brush temperature as a variable; adds up, for the time period from immediately after brush use starts until present, values that include the rotor rotation speed and the wear function value for the brush temperature, where wear function is defined as the wear amount per unit sliding distance of the brush; and arithmetically calculates the total wear amount for the brush.