Speed Sensorless Vector Control of Induction Motor Based on Adaptive Observer

Speed sensorless vector control of AC motor not only maintains the excellent performance of vector control,but also overcomes the adverse effects of speed sensor,so it is a promising way to realize low cost,high reliability and high performance AC speed regulation system. Speed sensorless vector control system of induction motor based on adaptive observer was studied. An adaptive full order flux observer model of induction motor was built,and speed sensorless vector control system was designed with the estimated speed for closed loop control. Physical experiment was done with TMS320F2810 DSP as the core of control system,a comparison with another sensorless method which based on voltage current model was made,the results of which show good performance of the control system and higher accuracy of speed control.