Brush Sliding Contact Voltage Deviation Analysis Based on the Evaluation of Displacement Excited Vibration caused by Collector Ring Profile Distortion -for Turbine Generators & Traction Motors-

When commutator profile distortion in DC motors or collector ring profile distortion in AC generators or motors are caused, stabilities and reliabilities of sliding contact phenomena will be lost, causing mechanical contact instabilities and contact voltage instabilities. In this paper, how to estimate the mechanical vibration out of the ring profile distortion and how to estimate contact voltage deviation out of the mechanical vibration, are introduced.