Research On Speed Sensorless Control System Of Interior Permanent Magnet Synchronous Motor

With the development of our economy,our country has higher and higher requirements on the motor and its control system,and more and more new fields are using the motor and its control system.Undoubtedly,in the future,the motor and its control system will be inseparable from the people’s life and will certainly become a part of life.Because of the permanent magnet synchronous motor with high power density,good operating efficiency,small size,it is widely used in the world.Control strategies for PMSM are most popular with vector control,but in order to achieve high-performance speed regulation,sensors must be installed to obtain rotor speed and position.This not only increases the cost of the system,but also reduces the reliability of the system.So speed sensorless technology has become a hot spot.In this paper,research on speed sensorless control system of interior permanent magnet synchronous motor(IPMSM)mainly includes the following contents:(1)Firstly,It is introduced the coordinate transformation,the mathematical model of the interior permanent magnet synchronous motor and space vector pulse width modulation(SVPWM)technology.Then through the use of Matlab/Simulink simulation platform,I set up their own simulation model,and lay the foundation for the future simulation of speed sensorless technology.(2)Secondly,the model reference adaptive system(MRAS)is estimated the rotor speed and position,and the simulation experiment is carried out in Matlab/Simulink.The system performance based on speed PI controller is analyzed.It has large overshoot,slow response,weak anti-interference ability and other issues.(3)Then,based on the shortage of speed PI controller,the sliding mode controller is introduced into the MRAS.Compared with the speed PI controller,the superiority and robustness of this control method are proved.(4)Finally,in order to verify the effectiveness of the control strategy,the main part of the interior permanent magnet synchronous motor vector control system hardware is designed,including:control board and drive board hardware design,and their corresponding circuit diagram design.