Research On Variable Frequency Speed Regulation System Of Induction Motor Based On DSP

With the rapid development of power electronic technology,computer control technology , the electric drives has become development trend that AC speed regulation system replaces DC motor speed regulation system . The AC variable frequency speed regulation is generally acknowledged by the home and abroad that it has a great future with excellent speed regulation , high efficiency saving energy .extensive scope of application and other merits. Focus on how to use Digital Signal Processor (TMS320LF2407A) to realize AC variable frequency speed regulation, is carried out in the thesis.On the basis of analyszing modern AC speed regulation technology, the thesis deduceds in detail the voltage space vector pulse width modulation (SVPWM) technology and compares to the control characterics betweem direct field oriented control (FOC) and indirect field oriented control (IFOC) for induction motor. By understanding the principle of SVPWM , the thesis researches at length the two kinds of realization based on hardware mode and software mode with TMS320LF2407A . Indirect oriented control of induction motor stimulation based on MATLAB is done. The thesis deduces detailedly flux observer and speed observer for a novel sensorless direct field oriented control, and stimulation results are also presented .Then by using stimulation tool (Power system blocket) of power system based on MATLAB, SVPWM are applied to speed sensorless indirect field oriented control system . The hardware of variable frequency speed regulation system based on TMS320LF2407A is designed .Finally , The experiment results are given. Experience and reference are provided in applying the TMS320F2427A to variable frequency speed regulation system.