ADVANCED DISTURBANCE OBSERVER-BASED ACTIVE FLUX ESTIMATION FOR SENSORLESS CONTROL OF IPMSM

Abstract

This paper presents an advanced disturbance observer-based active flux estimation algorithm for sensorless control of IPMSM. The stability of the proposed active flux observation is guaranteed using the Lyapunov stability theory. The method does not require frame transformation, enhancing system performance by reducing computational time and system independence on the d-axis inductance. An improved PLL method is developed by analysing the approximation effect in the conventional PLL during a transient condition. A MATLAB simulation is applied to validate the approach.