Research on rotor resistance adaptation algorithm for indirect vector control of induction machines

To realize the decoupling control of excitation and torque, Vector control of asynchronous motor requires accurate rotor flux position earring on rotor flux orientation. In the indirect vector control scheme, the accuracy of the rotor flux orientation is influenced by the motor parameters, especially the rotor resistance. In this paper, a new method for on-line correction of rotor resistance is presented. In this method, the rotor flux q axis component is obtained by the motor steady state model, we can design compensator based on the q axis component, which on-line adjust the rotor resistance to realize the rotor field orientation. This method is simple and easy to be realized online. This paper gives a detailed theoretical analysis and implementation algorithm. The validity of the algorithm is proved by the experimental results.