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Analysis Method of Contact Bounce for Multi-flexible Electric Contact Spring System

A technology of multi-flex electrical appliances and analysis methods, which is applied in the fields of instruments, electrical digital data processing, complex mathematical operations, etc., can solve the problems of difficult dynamic analysis and prediction of contact bounce, complex structural design and time-consuming, etc.

Active Publication Date: 2022-01-28
HARBIN INST OF TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the equation of the rigid-flexible coupling collision contact system contains strong nonlinear terms, the numerical behavior is very complex, which makes the dynamic analysis and prediction of contact bounce in this case very difficult.
[0004] At present, the reeds of electrical appliances will deform during operation. The traditional contact system dynamics analysis method based on the assumption of a rigid body obviously cannot meet the calculation requirements and analysis accuracy.
In addition, due to the extremely complex and time-consuming structural design of traditional electrical contact bounce experiments, and the mechanism of contact bounce cannot be clearly revealed

Method used

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  • Analysis Method of Contact Bounce for Multi-flexible Electric Contact Spring System
  • Analysis Method of Contact Bounce for Multi-flexible Electric Contact Spring System
  • Analysis Method of Contact Bounce for Multi-flexible Electric Contact Spring System

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Embodiment

[0104] 1. Computing power

[0105] Take a certain type of relay as an example ( Figure 5 ), utilize the method of the present invention to carry out action process simulation and bounce characteristic analysis to it. Relay related parameters are: u=27V, R=1560Ω, E=1.08×10 5 N / mm 2 , α=6°, R c =94.7mΩ, ρ=1.18×10 -5 kg / mm 3 , k=1×10 5 N / mm, d 1 =0.4mm, l=4.9mm, n=1.5, d 0 = 0.09 mm.

[0106] 2. Calculation process

[0107] (1) Complete the equivalent collision dynamics model of the relay contact spring system based on step 1;

[0108] (2) Deriving relay kinematics and collision dynamics differential equations according to step 2;

[0109] (3) Utilize step 3 to set up the moving reed displacement equation of relay;

[0110] (4) complete the matrix form of the kinetic equation of relay according to step 4;

[0111] (5) Solve the matrix form of the dynamic equation of the relay in formula (4) based on the 4th-order Runge-Kutta method. Among them, the calculated sprin...

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Abstract

The invention discloses a contact bounce analysis method for a multi-flexible electrical contact spring system. The method includes the following steps: Step 1, establishing an equivalent collision dynamics model of the electrical contact spring system; Step 2, constructing relay kinematics and Differential equation of collision dynamics; Step 3, establish the displacement equation of the moving reed of the relay; Step 4, complete the matrix form of the dynamic equation of the relay; Step 5, solve the matrix form of the dynamic equation of the relay to obtain the numerical solution of the generalized coordinate g , and then obtain the lateral displacement of the moving reed; step 6, analyze the dynamics and collision and bounce characteristics of the electrical contact spring system by solving the curve of the lateral displacement of the moving reed with time under different conditions. The invention simulates the dynamic process of the reed and collects the contact bouncing parameters in a simple and effective manner, and has better calculation accuracy compared with the traditional dynamic analysis method of the contact system which assumes a rigid body.

Description

technical field [0001] The invention relates to an analysis method for describing the bouncing behavior of an electric appliance, in particular to a method capable of effectively simulating the bouncing characteristics of the reed of the electric appliance contact spring system. Background technique [0002] For electrical appliances, phenomena such as poor contact and frequent separation of closed contacts greatly threaten the safety and stability of the power system. With the improvement of the reliability requirements of electrical appliances, more stringent requirements are put forward for their contact performance. In order to avoid contact faults and make electrical appliances have higher reliability and longer service life, it is necessary to reduce the contact bounce amplitude and bounce time. [0003] During a brief macro-collision process, due to the interaction between the elastic vibration of the reed structure and the collision, it is very likely that multiple ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20G06F17/13G06F17/11G06F17/15G06F17/16G06F119/14
CPCG06F30/17G06F30/20G06F17/13G06F17/11G06F17/15G06F17/16G06F2119/14
Inventor 刘兰香杨文英柴玉阳翟国富
Owner HARBIN INST OF TECH
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