Model Predictive Control Of PMSM Based On High Frequency Signal

In recent years,Permanent Magnet Synchronous Motor(PMSM)has been widely used due to its simple structure,high efficiency and high power density.At the same time,high-performance control system and sensorless control technology has received widespread attention.Finite Control Set Model Predictive Control(FCS-MPC)is a control algorithm based on mathematical model of PMSM.It has the advantages of fast dynamic response and small overshoot compared with traditional PI control.FCS-MPC is gradually applied to high performance control fields of permanent magnet synchronous motors.At the same time,the FCS-MPC has current ripple,the high-frequency excitation response,which contains the rotor position information of the permanent magnet synchronous motor,and can be used to design the sensorless control algorithm.The surface-mount permanent magnet synchronous motor is more difficult to study sensorless control algorithm due to its structural characteristics.In this paper studies the FCS-MPC and sensorless control algorithm of surface-mount permanent magnet synchronous motor.This paper first introduces the research background and current situation,and introduces the basic structure and mathematical model of PMSM.Then the space voltage vector of the inverter is introduced.Secondly,the FCS-MPC of PMSM is introduced.Based on the analysis of its high frequency excitation response,a sensorless control algorithm based on high-frequency reactive power is proposed to obtain the position information of PMSM.Due to the sensitivity of FCS-MPC to motor parameters,the NP-MPC without motor parameters is proposed by calculating the equivalent electromotive force and equivalent inductance on-line.For the sensorless control algorithm based on high-frequency reactive power,too much filters are needed.The sensorless control algorithm based on q-axis current error is proposed,and use identification of equivalent inductance to achieve identify polarity of PMSM.Finally,the hardware experiment platform and software based on TMS320F28335 are introduced in detail.The experimental results verify the correctness and effectiveness of the proposed NP-MPC and the sensorless control algorithm.