Wind Power Platform Power Speed Sensorless Drive Of All-digital Fuzzy Control Research And Application

This article focus on the research of Permanent magnet synchronous motor drivecontrol, relying on Wind Power experimental platform and using the Low-speed andhigh torque Permanent magnet synchronous motor as the research object.First of all, responding to questions on relevant aspects of the permanent magnetsynchronous motor drive, comprehending and analyzing the research status andrelated technologies at home and abroad, I establish the simulation model for thehardware for the experimental platform and select a relatively suitable algorithm.Secondly, deduce and analyze the principle of coordinate transformation, familiaringwith the mutual conversion between the various coordinate systems. Combining withthe relations of the PMSM space vector coordinates, I deduce the mathematical modelof the permanent magnet synchronous motors in three coordinate (a-b-c, alpha-beta,d-q)system and do a detailed analysis. Once more, I discuss deeply the theoreticalbasis and the features of the sliding mode control. Combining with the mathematicalmodel of permanent magnet synchronous motors in three (a-b-c, alpha-beta, d-q)coordinate system, I design a sliding mode observer based on the two-phase stationarycoordinate system. Related to model the actual data with the actual hardware platformneeds, I design the interface circuit between the RT_LAB and the converter, and runsuccessfully. At the same time I research Permanent magnet synchronous motorvoltage space vector control method and the conventional PI control, analyze andcombine both the features and the benefits to compensate for the correspondingdrawback, and design the PSMS senseless space vector modulation strategy basing onsliding mode observer. Finally, according to the actual condition of the hardware, Idesign hardware signal conversion circuit, to achieve and verify the sliding modeobserver algorithm and discrete PI control to in RT_LAB.Research and use the Matlab/Simulink simulation software, to build a discretesimulation model of the sliding mode observer and permanent magnet synchronousmotor space vector modulation system in the Simulink simulation platform. In this model, I verify respectively the design of the sliding mode observer based on thetwo-phase stationary coordinate system and the space vector modulation strategy.Reference to the actual output of the motor model rotor speed and rotor position, Ianalyze and verify the feasibility and accuracy of the estimation of rotor speed androtor position basing on the sliding mode observer. The simulation results show thatthe rotor speed and the rotor position calculated and estimated through the slidingmode observer can be fully tracking the actual rotor speed and rotor position. Thenintroducing the sliding mode observer into the model of permanent magnetsynchronous motor control, with using the estimated rotor speed and rotor position toreplace the actual rotor speed and rotor position of the motor model, I completediscrete simulation model based on sliding mode observer for PMSM speed sensorspace vector modulation system. The feasibility and verify the accuracy of discretesimulation models, and the motor speed is continuously adjustable within the ratedspeed range.Basing on the actual hardware requirements, I design and complete the signalconversion circuit between the inverter RT_LAB controller. On the basis of thesimulation, combining with the actual hardware parameters of the experimentalplatform of wind power, I build the experimental system of permanent magnetsynchronous motor speed sensor space vector modulation based on sliding modeobserver. I use the RT_LAB as controller and the signal conversion board as theinterface signaling between the controller and the control cabinet. Discrete PI control,space vector modulation and sliding mode observer on the rotor speed and rotorposition estimation algorithm is completed by the RT_LAB controller, so that toensure the integrity and synchronization of all signals and excellent speed control andanti-interfere with performance for the permanent magnet synchronous motors. Theexperimental results show that the controller makes the permanent magnetsynchronous motor drive system with the little static error, the short rise time, andstrong anti-interference ability.