Sensorless Control of Low-power Permanent Magnet Synchronous Motors Down to Zero Speed

This project deals with sensorless rotor position control of low-power permanent magnet synchronous motors. The sensorless operation shall avoid supplementary costs and realise a more compact motor design. In the higher speed range, it is possible to determine the rotor position, based on the back EMF voltage generated by the permanent magnets. For lower speeds, where the back EMF voltage is too low, there exist several approaches to realise sensorless control using the magnetic anisotropies of the rotor.