Theoretical Research On Sequential Phase Switching Control For Bus Transfer Of Induction Motor

In the theses,the induction motor sequential phase switching control method for bus transfer of induction motor has been in depth analyzed and studied,measuring data to carry on the simulation and actual.Firstly,a mathematical model of induction motor has been set up byαβ0 axis,infer to switch two stator winding's stator current analytic expression while induction motor sequential phase-switching,and a suitable first triggering angle has been get;Then infer to full switch's stator current analytic expression by space vector method,and get a suitable sequential triggering angle;Lastly, a SCR - induction motor system simulation model by MATLAB/SIMULINK soft has been set up,so the different transients in the starting and bus transfer processes with varied triggering angles or residual voltage can be simulated.Experiments are carried out to simulate the sequential phase-switching process of the induction motors with special loads,and the suitable triggering angles has been fixed,eliminating the stator's inrush currents and torque.