Hybrid control of permanent magnet of synchronous machine: Self-tuning speed controller and classical IP current controller

Abstract

This paper deals with control of permanent magnet synchronous machines. Their control is a difficult task because their dynamics are strongly nonlinear. Generally, vector control is used with direct axis current control. However, a problem might arise with such systems in terms of electrical parameter variations and, especially, the mechanical parameters, more specifically the inertia moment of the encircling mass. An adaptive approach is an interesting alternative, when parameters of the machine are unknown or varying in time; in order that objectives imposed by the control are reached and maintained. An adaptive control scheme is presented based on the online parameter estimation of the system or of the regulator.