Vector Control Based on Switching of Stator Flux Estimation for Multi-motor

According to two induction motor system including two inverters,a model under stator flux orientation was established,and was proved to be reversible.when the drive system running in low-speed,motor parameters such as stator resistance made stator flux be difficult to be estimated,so a new estimation for stator flux was put forward to solve this problem.In low-speed condition,a local model networks for stator flux was constructed to meet performance index given,and in high speed condition,the model was switched to voltage model of stator flux.Using this method,the control effect of drive system was guaranteed in whole-speed range because of satisfactory precision of stator flux identification,the simulation results showed the method was effective.