Identification of Resistance Fault in Inverter Switch of Brushless DC Motor Drive in Microgrid Application

Abstract

applications, brushless DC (BLDC) motor drives are becoming more and more significant because of their dependability, efficiency, and flexibility with regard to renewable energy systems (RESs). In this investigation, a novel fault detection technique for three-phase inverter (3PhI) switch resistance fault of brushless DC motor drive with permanent magnet (PMBLDC) is presented. Diagnostics of BLDC motor inverter switch resistance failure (BISRF) is based on the Fast Fourier Transform (FFT) analysis of the stator current of the BLDC motor supplied by the 3PhI. To detect the BISRF, the impact of BISRF on the fundamental, DC, and harmonic distortion, and also on subharmonics has been investigated over a range of fault levels. Depending on the best fit parameter, the BISRF has been identified. A BISRF detection algorithm also has been presented.