Disambiguation of Uniform Demagnetization Fault From Position Sensor Fault in FOC PMSM Applications

Electrification of higher torque density applications in the transportation sector and robotics are primarily met with permanent magnet synchronous machines (PMSMs), attributing to their unique properties. However, wide operating temperatures, field weakening controls, low-quality magnets, lead uniform demagnetization rotor magnets. Demagnetization control reduce effective output as is proportional flux level. Detection such essential only second few key faults from system perspective. static position sensor offset error (SPSOE) a fault mode that may mask itself fault. Though irreversible, SPSOE remediable avoiding sustained-severe degradation performance. The false positive nature detection discussed detail paper, disambiguation strategy proposed successfully implemented. Simulation experimental results presented validate effectiveness strategy.