Flux Oriented Control Of Asynchronous Motor Based On Dspace

Vector Control is an important strategy of control method in AC motor control.Its purpose is to equate the asynchronous motor speed control system as a DC motor speed control system.In order to achieve this goal,vector control introduces two important coordinate system transformations,namely the transformation of a three-phase natural coordinate system to a twophase stationary coordinate system,abbreviated as 3/2 transformation(Clark)and two-phase stationary coordinate system to two-phase rotation coordinates,referred to as 2s/2r transformation(Park).Based on Clark and Park transform,this thesis establishes the mathematical model of asynchronous motor in different coordinate systems.According to this mathematical model,the magnetic field orientation control structure of the stator and rotor is introduced.In different control architectures,the rotor flux and speed of the asynchronous motor are realized.Decoupling control,focusing on the analysis of the voltage decoupling unit,vector adjustment design and other key aspects of the design method;and then based on MATLAB/Simulink software built asynchronous motor rotor field orientation control model,through the simulation study asynchronous motor vector control strategy performance;For the verification of the designed control method,this thesis designs a vector control system for asynchronous motor based on dSPACE.This chapter introduces the control system from the hardware design and software design,and elaborates the dSPACE experimental procedure in detail.The steady-state and dynamic experimental results under different operating conditions are in good agreement with the simulation results.The control system designed in this thesis works accordindly,and the rotor field-oriented control method for asynchronous motors has better steadystate and dynamic performance.