Innovative standstill position detection combined with sensorless control of synchronous motors

摘要: Sensorless control of PMSM's (Permanent Magnet Synchronous Motors) has occupied scientists for a long time. The result this research is becoming widely accepted by the industry due to its low cost and reliability. However, majority today's motor drives are still equipped with some kind position sensor. reason that sensorless have several limitations usually more complex than traditional control. A new method estimate standstill presented. based on anisotropic properties permanent magnets therefore referred as MAM (Magnetic Anisotropy Method). proposed independent any ferromagnetic material can be used in many types ironless where standard methods fail. tested linear motor, measurement results from "stripped" rotative without supporting also Furthermore, it shown thesis how Extended Kalman filters rotor position, especially robustness dynamic response overall algorithm improved using identification experiments optimization algorithms. Some basic modelling process focused techniques which suitable observers such filters. To show versatility method, experimental two different first while second Hybrid Stepper Motor (HSM). Amongst other things will HSM transformed into highly brushless DC drawbacks associated HSM's. demonstrate possible achieve good robust direct Many simulation presented both motor. deliberately chosen steady-state operation algorithm. analysed, considering unknown external load torque parameters.