On permanent magnet synchronous motor load torque observer digital realization

Load torque dynamic model was established on the basic of mechanical equation and vector control theory of permanent magnet synchronous motor in order to solve load torque disturbing. Full-digital load torque observer and compensation control system was made based on digital AC speed regulation system. Experiment results prove load torque observer and compensation control system can detect and compensate torque disturbing effectively, which improve dynamic performance of motor greatly.