Title :
IMC-based current observer for PMSM
Author :
Yanwei Huang ; Shaohua Xiong
Author_Institution :
Dept. of Autom., Fuzhou Univ., Fuzhou, China
Abstract :
A current observer based on an internal model control is derived to estimate uncertainties in a permanent magnet synchronous motor (PMSM) caused by parameter variations and disturbances. Specially, a state-space model for current loop is set up as the internal model, and an estimation law is derived by robust Lyapunov functions for the augmented state-space model to improve the observer dynamics and stability index. Superior control performance on suppressing current ripple for PMSM is verified in experiments.
Keywords :
Lyapunov methods; electric current control; machine control; observers; parameter space methods; permanent magnet motors; reliability; robust control; state-space methods; synchronous motors; IMC-based current observer; PMSM; augmented state-space model; current loop; current ripple suppression; internal model control; observer dynamics improvement; parameter disturbances; parameter variations; permanent magnet synchronous motor; robust Lyapunov function; stability index improvement; superior control performance; uncertainty estimation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2015.1955
