Sensorless Control of Inner Permanent Magnet Synchronous Motor

In this thesis, a speed observer is implemented to estimate the position and the speed of an IPMSM by injecting a voltage signal at high frequency. The fundamental principle is to track the position error through a PLL loop, instead of aiming to estimating the actual position. Several simulations are carried out to assess the performance of the control system to parameter variations. The stability and the robustness of the control system is proved at different speeds.