A Comparative Study of a Robust Multivariable and Monovariable H∞ Controllers for Speed and direct current regulation of a Permanent Magnet Synchronous Machine Powered by an Inverter Voltage [articol]

Abstract

For permanent magnet synchronous machine (PMSM), nonlinearity of its state model, external disturbances as well as parameters variations due to temperature and excessive use… make difficult the application of conventional methods. Thus the uses of a linear model and along with simplifying assumptions are necessary. The main purpose of such control law is to ensure stabilization and some performance criteria such that trajectory tracking and time specifications (response time, static error, overshoot…). In this paper a comparative study of a robust multivariable and monovariable H∞ controllers for the speed and the direct current regulation of a permanent magnet synchronous machine is carried out. Both controllers are implemented under variations of ±10% of machine parameters and weighting filters integration. Experimental results are illustrated to prove the effectiveness of the comparative study.