Performance Analysis of Synchronous Motor Drives under Concurrent Errors in Position and Current Sensing

TL;DR

This paper provides an analytical framework to understand how concurrent errors in position and current sensors affect the performance of field-oriented control in permanent magnet synchronous motor drives.

Contribution

It introduces an exact analytical expression for estimated currents under simultaneous sensor errors and analyzes their impact on control performance.

Findings

Derived explicit formulas for current estimation errors

Quantified the impact of sensor errors on control accuracy

Provided insights for improving sensor robustness

Abstract

Field oriented control of permanent magnet synchronous motor drives involves the closed-loop regulation of currents in the synchronous reference frame. The current feedback is directly affected by errors in both position and stationary frame current measurements. This paper presents the exact analytical expression for estimated synchronous frame currents under simultaneous errors in both sensors along with a detailed analysis of the incorrect estimation on the closed-loop current control performance.