Effect of Bearing Faults on Vibration Spectrum of BLDC Motor

Abstract

The topic of this paper is the brushless DC motors’ bearing faults. Such motors have been gaining popularity during the past years due to the specific nature of the usage of the machines. Bearing faults are the most common failures emerging in the machines. The paper presents the most common bearing fault types, related to brushless DC machines. In addition, it presents the case study, where these faults are implemented to healthy bearings, in order to further test the impact on machine performance. Laboratory experiments of the setup with healthy as well as faulty bearings are explained and presented. Possibilities of monitoring and diagnostics, as well as the necessity of further study, have been pointed out.