Asynchronous motor parameter calibration method, device and equipment and storage medium

By using field-oriented control and parameter calibration methods, the output torque of the asynchronous motor under different current combinations is monitored, and the rotor time constant and equivalent inductance are calibrated. This solves the problem of numerous and inaccurate parameters in the existing technology and achieves precise control of the motor's output torque.

CN120880267APending Publication Date: 2025-10-31ZHIXIN CONTROL SYST CO LTD
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Patent Information

Application Number
CN202511200534.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-26
Publication Date
2025-10-31

AI Technical Summary

Technical Problem

Existing asynchronous motor parameter calibration methods involve a large number of parameters and inaccurate results, leading to insufficient accuracy in motor output torque and requiring repeated corrections.

Method used

By using field-oriented control, the actual output torque of the asynchronous motor under different current combinations is monitored. By using preset rotor time constant and equivalent inductance, the rotor time constant and equivalent inductance are calibrated, reducing the number of parameters and improving the accuracy of output torque.

Benefits of technology

The number of parameters required for motor control has been reduced, the accuracy of output torque has been improved, and it can be directly applied to actual working conditions without the need for subsequent corrections.

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Abstract

The invention discloses an asynchronous motor parameter calibration method, device and equipment and a computer readable storage medium. According to the method, magnetic field orientation control is carried out according to a preset rotor time constant; monitoring the actual output torque of the asynchronous motor under each current combination, wherein different current combinations comprise the same M-axis current and different T-axis current; if it is determined that the T-axis current and the actual output torque are in a direct proportion relation based on the monitoring result, determining a rotor time constant calibration value according to a preset rotor time constant; respectively substituting the current combinations and preset equivalent inductance into a torque formula to obtain theoretical output torque corresponding to each group of current combinations; if the difference value between the theoretical output torque corresponding to each current combination and the actual output torque is smaller than the difference threshold value, the equivalent inductance calibration value is determined according to the preset equivalent inductance, through the method, the theoretical output torque and the actual output torque are made to be consistent, multiple other parameters do not need to be calibrated, and the test amount is reduced.
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