Research On Sensorless Control Of High-Speed Permanent Magnet Synchronous Motor Based On Half-Practicality Simulation

High speed permanent magnet synchronous motor is widely used in electric vehicles,flywheel energy storage,aerospace and other fields because of its fast dynamic response,high power density and wide speed range.However,the rated frequency of high speed permanent magnet synchronous motor is high and the inverter has the limitation of switching loss,heat dissipation capability and other factors,which cannot increase the switching frequency accordingly.Therefore,the control of the high-speed permanent magnet motor is mostly based on the low carrier ratio.In order to meet the control requirements of high-speed permanent magnet motor,this paper proposes a speed sensorless full-speed domain control algorithm combining high-frequency square wave injection and discrete Luenberger observer with single-position robust observer.The development process of the traditional PMSM drive control system includes offline simulation and physical experiments.The use of offline simulation for research and development and testing is inefficient,and it is difficult to obtain a suitable experimental platform in physical experiments and there is a security risk.Therefore,based on the research of PMSM sensorless control,this paper designs a hardware-in-the-loop(HIL)simulation platform for PMSM.In order to improve the control performance of the low speed region of high speed permanent magnet synchronous motor,a low speed zone sensorless control method based on high-frequency square-wave-type voltage injection combined with rotor position robust observer is proposed in this paper.The square-wave-type voltage injection can avoid the use of band-pass filters and low-pass filters and improve the position estimating performance.The robust observer used has anti-load disturbance performance to improve the dynamic performance of the system.Base on this,combined with the discrete Luenberger observer which based on the stationary coordinate system designed in middle-high speed zone,can realize the high speed permanent magnet synchronous motor without position sensor full-speed range control.Based on sensorless control of PMSM full speed range control,this paper designs a HIL simulation based on dSPACE.HIL simulation can adjust system parameters in real time,improve simulation efficiency and shorten development cycle.And it can repeat operations on the same experiment,reduce research and development costs and ensure the safety of the experimental environment and experimental personnel.Finally,the sensorless composite control algorithm proposed in this paper is tested on the actual motor platform.It is verified that the algorithm can achieve good control of the full-speed domain of permanent magnet synchronous motor.At the same time,the results of the semi-physical simulation of the same control algorithm are compared to verify the correctness and effectiveness of the semi-physical simulation platform.