Multi-parameter decoupling online identification method for asynchronous motor

A technology for asynchronous motors and identification methods, which is applied in the control of generators, motor control, motor generator control, etc., can solve the problems of poor universality, influence, unproven stability, etc., and achieve an easy-to-achieve effect
CN110649851BActive Publication Date: 2021-10-08重庆中涪科瑞工业技术研究院有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
重庆中涪科瑞工业技术研究院有限公司
Publication Date
2021-10-08

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Abstract

The present invention relates to the technical field of asynchronous motors, in particular to an online identification method for multi-parameter decoupling of asynchronous motors, comprising the following steps: S1: constructing a parallel identification algorithm for asynchronous motor speed and stator resistance, exploring the coupling relationship between speed and stator resistance, using The second law of Lyapunov designs the adaptive law of speed and stator resistance, and finally conducts parallel identification of speed and stator resistance based on MRAS; S2: Build an identification strategy for asynchronous motor rotor resistance, and establish a rotor resistance based on small signal injection MRAS system reference model of resistance and MRAS system adjustable model. The invention can ensure the stability of the parallel identification of the rotational speed and the stator resistance at extremely low speed / zero speed by designing the self-adaptive law of the rotational speed and the stator resistance; the rotational speed and the rotor resistance can be identified in parallel without any influence on the output torque.
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Description

technical field

[0001] The invention relates to the technical field of asynchronous motors, in particular to an online identification method for multi-parameter decoupling of asynchronous motors. Background technique

[0002] In recent years, sensorless control of asynchronous motors has been widely used in industrial production because of its advantages of low maintenance cost, simple structure and strong system robustness. In the sensorless control technology of asynchronous motors, the stability of the control system at extremely low speed / zero speed and the online parallel identification research of multiple parameters are recognized as difficult problems in the academic circle.

[0003] In some special applications, such as the elevator control system, the pure electric braking system of the subway, etc., the control performance of the motor at extremely low speed / zero speed is particularly important. However, in many speed sensorless observation methods, the motor can...

Claims

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