Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Fault Detecting Scheme for Short-Circuited Turn in a Permanent Magnet Synchronous Motor through a Current Harmonic Monitoring
Authors Kyeong-Hwa Kim ; Bon-Gwan Gu ; In-Soung Jung
DOI 10.6113/TKPE/2010.15.3.167
Page pp.167-178
ISSN 1229-2214
Keywords Fault detecting scheme; Stator turn-fault; Current harmonics; DSP TMS320F28335; PMSM
Abstract To diagnose a stator winding fault caused by a short-circuited turn in a permanent magnet synchronous motor (PMSM), an on-line based fault detecting scheme during motor operation is presented. The proposed scheme is based on monitoring the second-order harmonic components in q-axis current obtained through the harmonic analysis and a winding fault is detected by comparing these components with those in normal conditions. The linear interpolation method is employed to determine harmonic data in arbitrary normal operating conditions. To verify the effectiveness of the proposed fault detecting scheme, a test motor to allow inter-turn short in the stator winding has been built. The entire control system including harmonic analysis algorithm and fault detecting algorithm is implemented using DSP TMS320F28335. The proposed scheme does not require any additional hardware and can effectively detect a fault during motor operation so long as the steady-state condition is satisfied.