Abstract: In order to overcome the drawback of direct torque control of induction motor which has large

torque ripples at low speed，a generalized predictive control method was proposed and be used in the direct torque control of induction motor. The method was directly used in speed control，and didn' t depend on the detail model of induction motor. It gets the algorithm model from the system identification and parameter estimation，and has the advantages of online identification，rolling optimization and low requirement for model. The generalized predictive control law was given. The result of simulation and experiment shows that the method has reduced the large torque ripples effectively at low speed，and shows good dynamic response characteristics.

      Key words: generalized predictive contro（l GPC）；direct torque contro（l DTC）；induction motor