Diagnosing the mechanical state of the collector-brush unit of the high-speed electric machine at resource tests

The questions on defining the mechanical state of collector-brush units in dynamic modes applying the techniques of result processing obtained with use of contactless profilometer developed in TPU have been considered. The results of experimental researches of the collector-brush unit mechanical state of the electric motor with alternating current during the process of resource operating time are introduced. The experimental data are analyzed. Recommendations on improvement of current collection conditions in sliding contact and increasing of brush resource are develope