The stator flux linkage adaptive SVM-DTC control strategy of permanent magnet synchronous motor

摘要

PMSM direct torque control can realize rapid torque response. The voltage space vector modulation technology is introduced into the traditional DTC. While maintaining the advantages of the traditional DTC, such as simple structure and fast torque response, the motor flux linkage trajectory can be more stable and the torque ripple can be effectively reduced. In this paper, considering that the constant amplitude of stator flux will bring unnecessary stator direct axis current and affect the stable operation of the motor, based on SVM-DTC control, the stator flux adaptive algorithm is introduced to prevent the demagnetization of permanent magnet synchronous motor and improve the power factor of the system. The simulation results show that the stator flux adaptive control strategy proposed in this paper can maintain the low torque ripple, improve the power factor of the system, and have good steady and dynamic performance.