Contactor speed closed loop control method based on neural network

Abstract

The invention relates to a contactor speed closed loop control method based on a neural network. The method comprises steps of firstly adopting a current closed loop as a base inner ring for flexibly adjusting the excitation state of a contactor; collecting the excitation voltage and the exciting current of the contactor, and calculating the real-time displacement of the contactor core with an embedded ANN model; and finally using real-time displacement information to calculate the real-time speed of the moving core, and constructing the contactor speed closed-loop control. The method introduces a neural network technology to establish a contactor neural network (ANN) model, does not require the contactor specific structure and material parameters, does not need to simplify the magnetic circuit and the assumption of non-saturation, completes construction of any contactor model only through a simple training process, so as to output high-precision displacement information. On this basis, the speed closed loop control scheme of the contactor is constructed to perform closed loop control over the moving speed of the moving core.

Description

technical field [0001] The invention relates to the field of electric appliance control, in particular to a neural network-based closed-loop control method for contactor speed. Background technique [0002] As a common electromagnetic switch, the contactor is widely used in various industrial control fields, and its performance index directly affects the safety and stability of the control system. There are many defects in the operation of traditional contactors, such as: it is difficult to realize AC and DC, and the working voltage range is narrow. If the voltage is lower than the release value for 5~10ms, the contacts will be broken, which will affect the operation reliability of the contactor in continuous production systems such as petroleum and chemical industry; there will be coil operation overvoltage, which will affect the operation reliability of other electrical equipment connected in parallel with the coil , the added overvoltage suppression circuit introduces ad...

AI Technical Summary

Problems solved by technology

There are many defects in the operation of traditional contactors, such as: it is difficult to realize AC and DC, and the working voltage range is narrow. If the voltage is lower than the release value for 5~10ms, the contacts will be broken, which will affect the operation reliability of the contactor in continuous production systems such as petroleum and chemical industry; there will be coil operation overvoltage, which will affect the operation reliability of other electrical equipment connected in parallel with the coil , the added overvoltage suppression circuit introduces additional hold power consumption

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