Effect of position sensor error on the performance of permanent magnet machine drives

摘要

Accurate knowledge of motor position is required in the motor drive application where smooth torque performance is needed. The error in position causes ripple in the developed current and thereby produce torque ripple. This paper analyzes the various effects of position sensor error in the current developed and in the torque generated in a current controlled Permanent Magnet Synchronous Motor drive. This research is focused on analyzing effect of position error on smooth production of torque in an IPMSM drive due to various inaccuracies. The analysis is verified through simulation and test results by measuring torque and torque ripple performances of a IPMSM drive. The results can be easily extended to SPM drive also.