Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Influence of Resistance Error to the Bandwidth of Back-EMF Estimation based SMPMSM Sensorless Drives
Authors Jae-Suk Kim ; Seung-Ki Sul
DOI 10.6113/TKPE/2016.21.5.418
Page pp.418-426
ISSN 1229-2214
Keywords Sensorless drive; Resistance error; SMPMSM(Surface Mounted Permanent Magnet Synchronous Machine); Adaptive control; Back-EMF observer
Abstract This paper analyzes the effect of resistance error to the performance of sensorless drive system of surface-mounted permanent magnet synchronous machine (SMPMSM) based on the back-EMF observer. The analysis shows that the bandwidth of the entire sensorless drive system decreased in the low-speed region when using smaller resistance value than the actual one in the back-EMF observer. Even if the back-EMF observer invokes estimation error, the entire sensorless drive system does not make any steady-state position error. These characteristics may have positive effects such as extension of the low speed limit that goes further down in the sensorless drive. The validity of the analysis is verified by the experimental setup comprising the MG set.