Simulation study on model-free control method in asynchronous motor control system

The slip frequency vector control of the asynchronous motor does not need the complicated flux detection, thus it is widely used in the speed control system which works under baseband. However, the shortcomings of the system are the large steady-state error, the long rising time and so on. Based on these issues, the paper presents a model-free adaptive controller which is introduced into the original system and constitutes the forward compensation with original system. Simulation results show that the controller for the induction motor slip frequency vector control system reduces the system steady-state error and the system´s dynamic characteristics have been greatly improved.