Intended to address the disadvantages of the permanent magnet synchronous motor for ship propulsion with high torque and inertial when using open-loop I/f control,including torque fragility,prone to loss of synchronism and low ef-ficiency,a method of improving I/f control is proposed.Establishing a torque angle observer allows the amplitude of the giv-en current vector to be adjusted to track the load torque,thus improving the robustness of the system.meanwhile,the motor is operating close to the condition of maximum torque/current,improving motor efficiency.the angular speed of the current vector is corrected by the instantaneous active power,which reduces torque fluctuations and accelerates the motor speed con-vergence process.In conclusion,simulation experiments are performed in Matlab/Simulink,the experimental results show that the method has significantly improved the operating efficiency and stability of the propulsion engine.
permanent magnet synchronous motorI/f controlinstantaneous active powerobservation of angle between current vector and flux linkage
维普
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