TY - JOUR
T1 - Thrust Force Calculation and Analysis for the Permanent Magnet Linear Motor Motion System Considering the Encoder Errors
AU - Yang, Xiaojun
AU - Zhao, Wanhua
AU - Song, Bifeng
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - In this article, we present the effects of encoder errors caused by the mechanical torsional vibrations on the characteristics of the thrust force for the permanent magnet linear motor (PMLM) motion system. First, the effects of the mechanical vibrations on the encoder errors are analyzed. Then, the three-phase current is calculated, considering the nonlinearity of the drive circuit. Based on Maxwell's equations and a Schwarz-Christoffel method, the analytical model of the magnetic field in airgap is established taking into account the slot effect. Finally, the thrust force considering the encoder errors is analytically presented using the electromagnetic energy method, and the experimental verification is carried out. The results show that the mechanical torsional vibrations will produce different kinds of encoder errors for the optical linear encoder. These encoder errors will be coupled with the harmonics in the magnetic field. Consequently, lots of new thrust harmonics appear, affecting the characteristics of the thrust force and the performance of the PMLM motion system.
AB - In this article, we present the effects of encoder errors caused by the mechanical torsional vibrations on the characteristics of the thrust force for the permanent magnet linear motor (PMLM) motion system. First, the effects of the mechanical vibrations on the encoder errors are analyzed. Then, the three-phase current is calculated, considering the nonlinearity of the drive circuit. Based on Maxwell's equations and a Schwarz-Christoffel method, the analytical model of the magnetic field in airgap is established taking into account the slot effect. Finally, the thrust force considering the encoder errors is analytically presented using the electromagnetic energy method, and the experimental verification is carried out. The results show that the mechanical torsional vibrations will produce different kinds of encoder errors for the optical linear encoder. These encoder errors will be coupled with the harmonics in the magnetic field. Consequently, lots of new thrust harmonics appear, affecting the characteristics of the thrust force and the performance of the PMLM motion system.
KW - Encoder error
KW - mechanical vibration
KW - permanent magnet linear motor (PMLM)
KW - thrust force
UR - https://www.scopus.com/pages/publications/85112652541
U2 - 10.1109/TIE.2021.3088370
DO - 10.1109/TIE.2021.3088370
M3 - 文章
AN - SCOPUS:85112652541
SN - 0278-0046
VL - 69
SP - 6069
EP - 6079
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 6
ER -