Sensorless Control of PMSM Based on Non-singular Fast Terminal Super-twisting Sliding Mode
Sliding mode observers are widely used in sensorless control of permanent magnet synchronous motor(PMSM),but traditional sliding mode observers have large chattering due to their own structure.To solve this problem,the traditional sliding mode observers are improved.First,the non-singular fast terminal sliding mode surface is used to replace the linear sliding mode surface,while the super spiral algorithm is used as the control law to redesign the non-singular fast terminal super spiral sliding mode observer.Then the Lyapunov function is used to prove its stability.In the MATLAB environment,a PMSM sensorless control system simulation model based on a non-singular fast terminal super spiral sliding mode observer is established for simulation verification and analysis.The simulation results show that compared with the traditional sliding mode observer,the designed method can effectively reduce chattering and improve the observation accuracy.
permanent magnet synchronous motornon-singular fast terminal sliding modesuper-twisting algorithmsensorless control
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