Self-Healing of Position Offset Error in Non-Salient PMSMs

Abstract

Reliability of mechatronic systems are in high demand due to the high level of embedded intelligence that are coupled to the system. Permanent magnet synchronous, machines (PMSM) being at the forefront of compact energy conversion systems, rapid fault diagnosis have is crucial. The position sensor being an essential part of PMSM, field-oriented control (FOC) scheme, a failure may render the system in an unpredictable state. Due to the closed loop nature of the FOC scheme, a position sensor offset error is masked from the current regulator. A self-healing strategy is proposed herewith for a position sensor offset fault capable of mitigating unpredictable behavior that may result from a position sensor offset error.