关键词: 永磁同步电动机（PMSM）, 模型预测控制, 评价函数, 无加权因子, 决策查找表

Abstract: A torque and flux control strategy with cascaded evaluation functions' optimization for electric drive systems was presented based on model predictive control （MPC）. According to the evaluation function values of the previous step，an intuitive decisionmaking logic for the sequence of evaluation function execution was adopted in an online selfadjustable manner. Compared with the traditional method of a single evaluation function，this method did not require adjustment and calculation of weighting factors. The effectiveness and overall performance of the proposed system were verified through experiments.

Key words: permanent magnet synchronous motor（PMSM）, model predictive control, evaluation function, without weighting factor, decision LUT