Robust Nonlinear Speed Control of Permanent Magnet Synchronous Motor

A robust nonlinear speed control of a permanent magnet synchronous motor(PMSM) is presented A quasi-linearized and decopled model including the influ­ence of parameter variations and speed measurement error on the nonlinear speed control of a PMSM is derived. Based on this model, a boundary layer integral sliding mode controller to improve the robustness and performance of the nonlinear speed control of a PMSM is designed and com­pared with the conventional controller. By employing the proposed control scheme, both the transient and steady state responses are greatly improved under the parameter varia­tions and speed measurement error.