Research On The Intelligent Method And The Key Technology For Converter

With the appearance of the new power electron apparatus the converter was produced.With the improvement of the microprocessor and the appearance of the new control strategy all kinds of advanced theories about motor variable-frequncy regulating speed control was appearanced. The intelligence of the converter is the best methed and that is the main content we must study.In the develop process of the intelligent hardware and software of system, which are elaborately schemed and designed. The hardware of system is made up of circuit cored around DSP(Digital Signal Processer)and IPM(Intelligent Power Module).The hardware of system consists of the major loop, control loop, protect loop,communication interface circuit.Software of system contains MRFAS (Model Reference Fuzzy Adaptive System) of rotor speed. The software of system realized by programming mingled C language and assembly language is made up of the main program, control module subprogram, CAN(Controller Area Network) communication subprogram,interrupt service routine subprogram.The vector control theory and its decoupling are introduced on the foundation of the mathematical model of asynchronous motor. The variables in 2-phase static coordinates are converted into the variables in rotating coordinates and the components between torque and magnetic field of stator winding current are decoupled which uses the rotor-field-oriented technology. Thus, the speed regulating performance of the asynchronous motor is improved highly.In the end, stimulations under advanced circumstance show that the system has ideal rapidity, precision, robustness reliability, anti-disturbance performance.