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Calculation method of mechanical characteristics of electromagnetic relay closing bounce electrical contact under capacitive load

A technology of electromagnetic relay and mechanical characteristics, applied in the direction of instrumentation, design optimization/simulation, electrical digital data processing, etc., can solve the problems of time-consuming, complicated experimental research structure design of electromagnetic relay contact characteristics, and inability to clearly reveal the mechanism of contact bounce, etc. Achieve the effect of saving time

Active Publication Date: 2022-03-25
贵州振华群英电器有限公司(国营第八九一厂)
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  • Application Information

AI Technical Summary

Problems solved by technology

However, few scholars have used theoretical methods to study the bounce characteristics of relays under capacitive loads.
In addition, due to the extremely complex and time-consuming structural design of the experimental research on the contact characteristics of electromagnetic relays, the mechanism of contact bounce cannot be clearly revealed

Method used

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  • Calculation method of mechanical characteristics of electromagnetic relay closing bounce electrical contact under capacitive load
  • Calculation method of mechanical characteristics of electromagnetic relay closing bounce electrical contact under capacitive load
  • Calculation method of mechanical characteristics of electromagnetic relay closing bounce electrical contact under capacitive load

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Embodiment

[0115] 1. Calculation example

[0116] The structure diagram of the electromagnetic relay is as follows figure 2 shown. Relay related parameters are: M1 =12.9g, M 2 =7g,k 1 =0.37N / mm,k 2 =13N / mm,y x =2.68mm,y d =1.7mm,F f =6N,F c =7N,k=5.3×10 5 N / mm,k c =1N / (mm / s), n=1.5, δ=0.1mm. The circuit and electrical contact parameters are: I=0.7A, N=2100, S=430mm 2 ; u s =1V, C=220μF, R=22Ω, R r =0.32mΩ,μ 0 =4π×10 –10 H / mm, ξ=0.45, H=91N / mm 2 , R 1 =5.5mm and P=10N.

[0117] 2. Calculation process

[0118] (1) Based on the establishment steps of the mathematical model of the electromagnetic force, the mathematical model of the electromagnetic force of the electromagnetic relay is completed.

[0119] (2) According to the establishment steps of the mathematical model of the contact force, the mathematical model of the contact force of the electromagnetic relay is completed.

[0120] (3) The mathematical model of electric repulsion is used to establish the mathematical...

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Abstract

The invention discloses a method for calculating the mechanical characteristics of the closed bounce electrical contact of an electromagnetic relay under a capacitive load. The method includes the following steps: (1) Formulate description of the action process, and establish a mathematical model of the electromagnetic force and a mathematical model of the contact force of the electromagnetic relay And the mathematical model of electric repulsion. (2) Using MATLAB language to write a calculation program to realize the coupling solution of the mathematical model of electromagnetic force, mathematical model of electrodynamic repulsion and mathematical model of contact force. In the coupling solution process, the fourth-order Runge-Kutta method is used to analyze the contact bounce and dynamic characteristics of the electromagnetic relay under capacitive load. The invention provides an analysis method for solving and analyzing the bouncing characteristics of electromagnetic relays, which can simultaneously solve the electromagnetic field and mechanical field coupling equations that control the bouncing behavior of its contacts, has strong versatility, and can be used in various working conditions Different relays, thereby improving the efficiency of the analysis of the bounce characteristics of electromagnetic relays.

Description

technical field [0001] The invention relates to a method for calculating the bouncing characteristics of a relay under a capacitive load, in particular to a method for simulating the dynamic movement process of a moving contact and an armature and obtaining the bouncing parameters of the contact at the moment when the relay switches the capacitive load. Background technique [0002] Electromagnetic relays are widely used in power control and power conversion circuits in the high-end equipment manufacturing industry. Long service life and high reliability are the urgent needs of the country at present. The key factor affecting the dynamic characteristics of the electromagnetic relay is the contact bounce between the moving and static contacts and between the armature irons. Numerous studies have shown that contact bounce increases contact wear and shortens the life of electromagnetic relays. Switching capacitive loads is an unavoidable task in controlling electrical circuits...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/10G06F119/14
Inventor 杨文英刘兰香柴玉阳滕孟兰翟国富
Owner 贵州振华群英电器有限公司(国营第八九一厂)
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