2012 Volume 132 Issue 12 Pages 1097-1103
Sliding electric contact technologies play a very important role in the manufacture of various electrical components such as brushes and slip rings of turbine generators, including variable-speed hydraulic turbine generators and wind turbine generators, and elucidating electric wear phenomena of the brush is important for improving the technologies. We classified these phenomena into two modes: bridge rupture and arc discharge evaporation. The modes are based on existent theories in the field of switching the contacts, and they were used to construct an analysis model for elucidating electric brush wear volume. After a theoretical analysis, we examined the accuracy of brush wear prediction on the basis of comparisons between calculated results and experimental results.