Research Article
Khalid I Baradieh and Zakar
Abstract
LSPMSMs combine the high efficiency of the permanent magnet motors (PM) with the ease of use, simplicity in design and high starting ability of induction motors. Since there are a rapidly growing usage of this relatively new motor, studying its performance under fault conditions is necessary. In this paper, a technique based on coupled magnetic circuit theory has been used in order to develop a mathematical model for LSPMSM under broken bar fault conditions. This model takes into account the rotor asymmetry due to fault in qd0 reference frame. Motor’s torque, rotor speed and stator current signatures for healthy machine (with 28 bars), machine with one, five and ten broken bars are presented under no load and full load conditions. Trends obtained are in good agreement with previously reported work.