Abstract: Aiming at the complex problem of weight factors tuning when the induction motor driving system adopts the finite set model predictive control，an optimal finite set model predictive controller without weight distribution for induction motor driving system was designed. In the new scheme，the form of sequential cascading prediction was adopted，that is，independent cost functions were used to select the switching state for each control target in the system，and the torque and flux linkage predictive control could be completed without setting the weight factors. Compared with the traditional scheme，the new finite set model predictive control scheme is simple in logic and easy to implement，and can avoid all problems related to the setting of weight factors. Experiments were carried out using the induction motor driving system test platform，and the experimental results verify that the new scheme can achieve fast dynamics and better control performance.

      Key words: induction motor；drive system；model predictive control；no weight distribution