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A Calculation Method of Contactor Bounce Characteristics Considering Structural Thermal Field Effect

A technology of characteristic calculation and contactor, applied in the direction of calculation, computer-aided design, instrument, etc., can solve the problem of increased heat generation, complex motion state and bounce characteristics of contactor multi-physics coupling, and no multi-physics coupling involved in the action process. Solve problems such as dynamic characteristics

Active Publication Date: 2021-11-23
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

In recent years, the increase in the working power of the contactor itself has led to an increase in the calorific value of its structure, and the calculation error caused by ignoring the temperature has become more and more obvious
The impact and collision problem in the on-off process itself has instantaneous nonlinearity, coupled with the influence of temperature rise changes in the contactor structure, making the multi-physics field coupling motion state and bounce characteristics of the contactor more complicated
[0003] Traditional contactor bounce characteristic analysis or temperature field analysis focuses on electromagnetic-structure, electromagnetic-thermal field coupling research, and does not involve the complex action process and its electric, magnetic, thermal multi-physics field coupling to solve the dynamic characteristics

Method used

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  • A Calculation Method of Contactor Bounce Characteristics Considering Structural Thermal Field Effect
  • A Calculation Method of Contactor Bounce Characteristics Considering Structural Thermal Field Effect
  • A Calculation Method of Contactor Bounce Characteristics Considering Structural Thermal Field Effect

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Embodiment

[0133] The structure profile of the contactor is as figure 1 . The relevant parameters of the contactor are: room temperature 20°C, stroke 2.68mm, opening distance 1.7mm, moving contact mass 7g, armature mass 9g, connecting rod mass 4g, coil current 0.7A, coil resistance 40Ω, overtravel spring preload 7N, The stiffness of the overtravel spring is 13N / m, the preload of the return spring is 6N, and the stiffness of the return spring is 0.37N / m.

[0134] The calculation process is as follows:

[0135] (1) Establish the thermal field module of the contactor according to the operation steps of the thermal field module, figure 2 A area;

[0136] (2) Establish the electromagnetic module of the contactor according to the operation steps of the electromagnetic module, figure 2 Area B;

[0137] (3) Establish the contactor vibration and collision module according to the operation steps of the vibration and collision module, figure 2 C area;

[0138] (4) According to the operati...

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Abstract

The invention discloses a method for calculating the bouncing characteristics of a contactor considering the effect of a thermal field. The method first establishes a mathematical model of a thermal field, a mathematical model of electromagnetic characteristics, and a mechanical model of vibration and collision of the contactor; then establishes a finite element of the thermal field of the contactor Model, electromagnetic finite element model and numerical model of vibration and impact dynamics; the thermal field finite element model, electromagnetic finite element model and numerical model of vibration and impact dynamics of the contactor are named thermal field module, electromagnetic module and vibration and impact module respectively. The data interaction method of the interaction relationship between electric-magnetic, electric-magnetic-thermal, electric-magnetic-structural fields, module connection in MATLAB / Simulink; finally, the contactor is calculated based on the electric-magnetic-thermal-structural multiphysics model bounce characteristics. The invention has key significance for perfecting the establishment of the contactor bouncing model, in-depth development of contactor multi-physical field coupling calculation and bouncing mechanism research.

Description

technical field [0001] The invention relates to a method for calculating the bouncing characteristics of a contactor considering the effect of its structural thermal field, in particular to a method for calculating the bouncing characteristics and analyzing the dynamic characteristics of the multi-physics field of electric-magnetism-heat-structure. Background technique [0002] Contactors are often used to control electrical loads and take on important functions such as circuit on-off and voltage release protection. Because the contactor uses a multi-turn coil, and its long-term work will lead to obvious changes in the temperature rise of the structure, which will affect the resistance of the contactor coil and the magnetic saturation of the magnetic material, which will cause changes in the electromagnetic force and seriously affect the contactor. Working status and bounce characteristics. For contactors with no obvious heat generation or whose working temperature is close...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23G06F30/28G06F111/10G06F119/08G06F119/14G06F113/08
CPCG06F2111/10G06F30/17G06F2119/08G06F30/23G06F2119/06
Inventor 杨文英刘兰香柴玉阳翟国富
Owner 贵州振华群英电器有限公司(国营第八九一厂)
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