Online inertia recognition method and system, motor controller and readable memory

Abstract

An embodiment of the invention provides an online inertia recognition method and system, a motor controller and a readable memory. The online inertia recognition method is applied to load inertia whena motor runs under a load and includes: superimposing self-sustained oscillation into closed-loop output of a speed loop by adding a nonlinear link; detecting angle frequency and amplitude of self-sustained oscillation; acquiring to-be-recognized load inertia according to the angle frequency and the amplitude of self-sustained oscillation. By adding an ideal relay link into closed-loop output ofthe speed loop, online recognition of inertia can be realized almost without impact on running of the speed loop (superimposed with small-amplitude oscillation); the method is small in operand and suitable for embedded software realization; the method can be utilized to immediately recognize load inertia in occasions where the load inertia changes gradually, and the load inertia can be taken as acontrol basis to improve speed response performance and stability.

Description

technical field [0001] Embodiments of the present invention relate to the field of motor control, and more specifically, relate to an online inertia identification method, system, motor controller and readable memory. Background technique [0002] The rapid development of advanced manufacturing has put forward higher requirements for the performance of motor drives, especially the dynamic response performance. As an advanced control algorithm, vector control is widely used in drives such as inverters and servos. Therefore, it is a meaningful research topic to improve the dynamic response performance of vector control. [0003] For a typical current and speed double-closed-loop vector control system, the current loop parameters are directly related to the motor parameters. Generally speaking, after the motor parameters are determined, the current loop parameters can be directly adjusted, and the current loop response is fixed. Adjust again. As for the speed loop, its loop r...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide an online inertia identification method, system, motor controller, and readable memory, aiming to solve the problem that in the current inertia identification methods, the offline inertia identification method has high requirements on operating curves and operating conditions, and cannot achieve inertia However, the online inertia identification method has problems such as parameter sensitivity, poor anti-interference performance, and high computational overhead.

Images