Publications Repository - Gdańsk University of Technology

This paper presents a speed observer design based on backstepping and slidingmode approaches. The inputs to the observer are the stator current and thevoltage vector components. This observer structure is extended to the integra-tors. The observer stabilizing functions contain the appropriate sliding surfaceswhich result from the Lyapunov function. The rotor angular speed is obtainedfrom the non‐adaptive formula with a sliding mode mechanism. It allowsimprovement of the robustness of parameters uncertainties and the zero rotorspeed to work (near to the unobservable region). In the sensorless controlsystem, the classical first‐order sliding‐mode controllers are applied with thetransformation of the multi‐scalar variable. The proposed control system struc-ture can be named full‐decoupled due to multi‐scalar variables transformationand the feedback control law obtained from the Lyapunov theorem. The theo-retical derivations are verified in experimental waveforms. The sensorlesscontrol system's robustness is verified in the experimental investigations byusing the nominal machine parameters uncertainties method.

Authors

• prof. dr hab. inż. Marcin Morawiec link open in new tab ,
• dr hab. inż. Arkadiusz Lewicki link open in new tab ,
• dr inż. Filip Wilczyński link open in new tab