The Variable Frequency System To Induction Motor Of Higher Power Factor

To save up the energy and protect environment, this thesis analyzes and researches power of induction motor the relation between the self-parameter and Δω, getting a practical controlling regular. And we regard the result as the basis of higher power factor auto-control. On the basis of the model of variable frequency adjusting speed, we add higher power factor controller, which becomes controlling system speed close loop with SPWM techniques. Finally we establish a system model with which we simulate and analyze the control system through MATLAB. The simulation results demonstrate that it can save up energy about 30-50% when there is no load or a little load. We carry out the controlling system, using DSP controller. This thesis can provide important reference function. It is a high value to popularize and apply the controlling system.