Research on on-line inertia identification of marine permanent magnet synchronous motor
The moment of inertia and load torque of Marine permanent magnet synchronous motor propulsion system are disturbed.To solve the above problems,an online inertia identification algorithm based on the combination of gradient correction method and extended Kalman filter is proposed.The gradient correction method is used to identify the moment of inertia,and the extended Kalman filter is used to observe the load torque,and the identified inertia value is used to correct the coefficient matrix of the filter.The observed load torque is used as input parameter of gradient correction method and feed-forward compensation of current loop.Simulation and experiments verify the feasibility of the inertia identification al-gorithm and the anti-disturbance performance of the system for load torque variation.
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