Brush for an electric machine, in particular of a motor vehicle, and method for determining wear of such a brush

The invention relates to a brush (10) for an electric machine, comprising at least one brush body (2) which has an electrical resistance, is designed for electrical contacting of at least one component moving relative to the brush body (2) during operation of the electric machine, and during the operation of the electric machine wears in a wear direction (3) as a result of frictional contact withthe component, and comprising a detection device (4) for determining the wear of the brush body (2). The detection device (4) has a plurality of detection zones (11, 12, 13) spaced apart from one another in the wear direction (3), the electrical resistance of each of said zones differing from the electrical resistance of the brush body (2). 本发明涉及一种用于电机的电刷(10)，所述电刷具有至少一个电刷体(2)，所述电刷体具有电阻，所述电刷体构成为用于电触通在所述电机运行期间相对于所述电刷体(2)运动的至少一个构件并且在所述电机运行期间沿着磨损方向(3)由于与所述构件的摩擦接触而发生磨损，并且所述电刷具有用于确定所述电刷体(2)的磨损的检测装置(4)，其中，所述检测装置(4)具有沿着所述磨损方向(3)彼此间隔开的多个检测区域(11、12、13)，所述检测区域的各个电阻与所述电刷体(2)的电阻不同。