Speed control of permanent magnet synchronous motor based on exact linearization via state variable feedback

The feasibility of designing controller for control permanent-magnet synchronous motor speed is proposed by using differential geometry theory.The rationale of controlling permanent-magnet synchronous motor speed is introduced with differential geometry method based on mathematic model.The condition of output function chosen as speed is deduced and the exact linearization of permanent-magnet synchronous motor model had been completed.Applying the analysis results,the state feedback controller is designed.The nature of dynamic response and the anti-jamming ability of cotroller are researched by simulation method.The control result of PI controller and nonlinear controller is contrasted under the same model and conditions.The simulation results show that the nonlinear control method which using differential geometry theory design controller to control permanent-magnet synchronous motor model is feasible and the control result is satisfied.The controller has better controlling accuracy and stastic charactor with is improved obviously.