关键词: 双三相永磁同步电机, 滑模趋近律, 预测速度控制, 最速下降

Abstract: To improve the robustness of the dual three-phase permanent magnet synchronous motor system to cope with complex disturbances, a sliding mode predictive speed control strategy with the steepest descent observer was proposed. The motion model of the dual three-phase permanent magnet synchronous motor with disturbances was developed by adding parameter mismatch and external disturbances to the coefficient of q-axis current. A sliding mode predictive speed control strategy was proposed based on the motor disturbance model, which uses a new power reaching law based on the
hyperbolic tangent function and was able to suppress the sliding mode chattering while maintaining a fast tracking speed. More importantly, a disturbance observer based on the steepest descent algorithm was designed to estimate the coefficient of q - axis current, which varies moment-to-moment with superimposed disturbances, and pass them into the sliding mode predictive speed control model. Compared with the conventional sliding mode predictive speed control, simulation results demonstrate the excellent dynamic tracking performance and disturbance suppression performance of the proposed method.

Key words: dual three-phase permanent magnet synchronous motors ( DTP-PMSM ), sliding mode reaching law, predictive speed control, steepest descent