Method, device and equipment for calibrating maximum torque current ratio of permanent magnet synchronous motor

Abstract

The invention relates to the technical field of permanent magnet synchronous motors, in particular to a maximum torque current ratio calibration method, device and equipment of a permanent magnet synchronous motor. The method comprises the following steps: generating a current amplitude maximum torque current ratio MTPA table according to an obtained maximum torque value under each current amplitude of the permanent magnet synchronous motor and a current angle corresponding to the maximum torque value; generating a current angle MTPA table according to the obtained maximum torque value at each angle of the permanent magnet synchronous motor and the current amplitude corresponding to the maximum torque value; and according to the data of the current angle MTPA table, blank lattice points in the current amplitude MTPA table are supplemented to obtain an MTPA calibration result of the permanent magnet synchronous motor. Therefore, the problems of long calibration period, low efficiency, poor calibration precision, high labor cost and the like due to the fact that the maximum torque current ratio is calibrated manually in the prior art are solved.

Description

technical field [0001] The present application relates to the technical field of permanent magnet synchronous motors, and in particular, to a method, device, electronic device and storage medium for calibrating a maximum torque-to-current ratio of a permanent magnet synchronous motor. Background technique [0002] The parameters of the IPMSM (Permanent Magnet Synchronous Motor) are prone to change with the operating state, resulting in parameter uncertainty that will affect the control performance of the motor. The current change during the motor operation has a great influence on the inductance value of the motor windings, especially in the magnetic circuit. When saturated, the inductance parameter changes more obviously, therefore, the precision requirement of motor MTPA (maximum torque to current ratio) calibration is getting higher and higher. [0003] In the related art, the motor MTPA is usually calibrated by manual calibration. However, manual calibration requires en...

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Problems solved by technology

[0004] The present application provides a method, device, electronic device and storage medium for calibrating the maximum torque-current ratio of a permanent magnet synchronous motor to solve the problem of manually calibrating the maximum torque-current ratio in the related art, which has a long calibration period and low efficiency, and Calibration accuracy is poor, labor costs are high, etc.

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