Vector control method, recording medium and system for synchronous motor

By establishing a small signal model and a loop iteration method, the vector control of the synchronous motor is optimized, which solves the problem of dependence on motor parameters, improves control accuracy and robustness, and reduces the amount of calculation.

CN119483383BActive Publication Date: 2025-09-23NAVAL UNIV OF ENG PLA
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Patent Information

Application Number
CN202411858458.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-17
Publication Date
2025-09-23
Estimated Expiration
2044-12-17

AI Technical Summary

Technical Problem

The existing model predictive current control algorithm is highly dependent on motor parameters, resulting in large computational complexity and low control efficiency and accuracy. In addition, the artificial neural network algorithm is not closely integrated with the model predictive current control.

Method used

By establishing the state equation of the small signal model and using Laplace transform to obtain the relationship between the virtual current deviation and the virtual voltage deviation, combined with the idea of ​​loop iteration, the dependence on motor parameters is reduced, the closest voltage vector is selected for control, and the calculation process is optimized.

Benefits of technology

The data processing amount is reduced, the robustness and control accuracy are improved, the dependence on motor parameters is reduced, and smaller current harmonics are achieved.

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Abstract

The present invention belongs to the field of motor control technology, and in particular relates to a vector control method for a synchronous motor, which obtains the relationship between the virtual current deviation and the virtual voltage deviation in the intermediate process of vector control; finds the voltage vector deviation closest to the virtual voltage deviation from all possible voltage vector deviations of the current cycle relative to the previous cycle, and performs an AND operation with the reference value of the voltage vector of the previous cycle to obtain the reference value of the voltage vector of the current cycle, applies the reference value to the bridge arm of the motor inverter, changes the switching state of the inverter, and realizes vector control of the motor. By recycling the current of the previous cycle, the algorithm's dependence on motor parameters is reduced. This method can significantly reduce the amount of data to be calculated, improve the efficiency and accuracy of control, and is suitable for synchronous motor speed regulation. The present invention also provides a non-transient readable recording medium storing the method program and a system containing the medium, which can call the program through a processing circuit to execute the above method.
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