Self-directed learning permanent magnet synchronous motor MTPA curve tracking method and apparatus

Abstract

The invention discloses a self-directed learning permanent magnet synchronous motor MTPA curve tracking method and apparatus. The method comprises the steps of S1, performing initialization of a current amplitude value and a current angle value; S2, updating the current amplitude value at present; S3, obtaining a newest current angle value by summing of an angle compensation amount output by a PIregulator and the current angle value at present through an angle calculator, wherein the current angle value at present is updated into the newest current angle value; S4, working out a derivative ofthe current torque to the current angle value at present by a self-directed learning derivative observer through a disturbance observation method; S5, judging whether the derivative is within a set range or not by an error judger, if so, executing a step S6, or otherwise, executing a step S7; S6, if the current amplitude value at present is added with 10A, jumping to the step S2; and S7, enablingthe PI regulator to work out the angle compensation amount according to the derivative to be output to the angle calculator, and then jumping to the step S3. By changing the static calibration mode into a dynamic searching mode, the current angle value with the highest torque can be searched at the current vector value at present.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a self-learning permanent magnet synchronous motor MTPA curve tracking method and device. Background technique [0002] With the development of the national economy and science and technology, the role played by motors in all walks of life is becoming more and more important. Permanent magnet synchronous motor benefits from its many advantages in design, manufacture and control, and is widely used in various industrial production and life occasions. In addition, my country is rich in rare earth resources, and the application market of permanent magnet synchronous motors is particularly large in my country. The permanent magnet synchronous motor can be divided into surface mount type and built-in type according to the similarities and differences of the AC-D axis inductance. Because the built-in permanent magnet synchronous motor (IPMSM) can have a wid...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical problems of long construction period, low efficiency, poor accuracy and poor robustness existing in the existing MTPA curve manual calibration method, and to provide a self-learning permanent magnet synchronous motor MTPA curve tracking method and device, It changes the static calibration mode to a dynamic search mode, and searches out the current angle value with the maximum torque under the current current vector size in real time

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