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Method for calculating closing bounce electrical contact mechanical properties of electromagnetic relay under capacitive load

A technology of electromagnetic relays and mechanical properties, applied in the fields of instruments, electrical digital data processing, design optimization/simulation, etc., can solve problems such as time-consuming, inability to clearly reveal the mechanism of contact bounce, and complex structure design for experimental research on contact characteristics of electromagnetic relays. to save time

Active Publication Date: 2020-04-28
贵州振华群英电器有限公司(国营第八九一厂)
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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, and the mechanism of contact bounce cannot be clearly revealed

Method used

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  • Method for calculating closing bounce electrical contact mechanical properties of electromagnetic relay under capacitive load
  • Method for calculating closing bounce electrical contact mechanical properties of electromagnetic relay under capacitive load
  • Method for calculating closing bounce electrical contact mechanical properties of electromagnetic relay 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: M 1 =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 steps of establishing the electromagnetic force mathematical model, the electromagnetic force mathematical model of the electromagnetic relay is completed.

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

[0120] (3) Use the steps of establishing the mathematical model of the electric repulsion to complete the mathemati...

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Abstract

The invention discloses an electromagnetic relay closing bounce electrical contact mechanical property calculation method under a capacitive load, and the method comprises the following steps: (1), carrying out the formulated description of an action process, and building an electromagnetic force mathematic model, a contact force mathematic model and an electric repulsion mathematic model of an electromagnetic relay; and (2) compiling a calculation program by adopting MATLAB language to realize coupling solution of the electromagnetic force mathematical model, the electric repulsion mathematical model and the contact force mathematical model. In the coupling solving process, contact bounce and dynamic characteristics of the electromagnetic relay under the capacitive load are analyzed basedon a four-order Runge-Kutta method. The invention provides the analysis method for solving and analyzing the bounce characteristics of the electromagnetic relay, an electromagnetic field and mechanical field coupling equation for controlling the contact bounce behavior of the electromagnetic relay can be solved at the same time, the universality is extremely high, the method can be applied to different relays under various working conditions, and the analysis efficiency of the bounce characteristics of the electromagnetic relay is further improved.

Description

technical field [0001] The invention relates to a method for calculating the bounce characteristic of a relay under capacitive load, in particular to a method for simulating the dynamic motion process of a moving contact and an armature and obtaining the contact bounce parameters at the moment when a relay switches a 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 urgent needs of the country. 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 yoke. 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. During the closing process of the...

Claims

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Application Information

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Patent Type & Authority Applications(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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