| Abstract |
We investigate the sensorless permanent magnet synchronous motor drive. We give a short outlook of
leading observer design methods such as hypothetical position approach, Luenberger state observer
approach, estimation based on voltage equations (voltages and currents measurement or flux
integration approach). We investigate robustness of speed estimation in presence of flux
irregularities, magnetic asymmetry, discretization and filtration effects. Speed and position estimation
error equations are derived and analysed. Numerical experiments are provided to compare robustness
of selected observers. Some conclusions on the possibility of obtaining more robust observers are
derived. |
