Method for calculating dynamic characteristics of contactor based on piecewise linear kinetic equation

A dynamic equation and piecewise linear technology, which is applied in the field of contactor dynamic characteristic calculation based on piecewise linear dynamic equation, can solve the problem of low calculation efficiency of multi-software co-simulation

Active Publication Date: 2018-03-30
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the vacancy of multidisciplinary interdisciplinary and multi-field coupling calculation of the current contactor dynamic characteristic modeling; the low efficiency of multi-software joint simulation calculation; the problem of accurate calculation of the dynamic characteristic of the contactor considering the impact and bounce, to provide a The calculation method of the dynamic characteristics of the contactor based on the piecewise linear dynamic equation specifically relates to a calculation method of the abstract mathe

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  • Method for calculating dynamic characteristics of contactor based on piecewise linear kinetic equation
  • Method for calculating dynamic characteristics of contactor based on piecewise linear kinetic equation
  • Method for calculating dynamic characteristics of contactor based on piecewise linear kinetic equation

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specific Embodiment approach 1

[0079] Specific implementation mode 1: This implementation mode records a method for calculating the dynamic characteristics of a contactor based on piecewise linear dynamic equations. The specific execution steps of the method are as follows:

[0080] Step 1: 3D drawing and virtual product assembly: Use 3D drawing software (Solidworks, UG, ProE) to establish each component part of the contactor according to the actual size, assemble according to the geometric relationship, technical requirements, and coordination constraints, and join each part into a component and virtual products, and try to maintain product design accuracy;

[0081] Step 2: Establishment of the electromagnetic finite element model: By analyzing the working principle of the contactor, simplify the electromagnetic structure of the contactor, import it into FLUX, and then use the three-dimensional transient electromagnetic characteristic solution method, combined with the electromagnetic parameters of the cont...

Embodiment 1

[0127] 1. Instance parameters

[0128] For a certain type of DC high-power solenoid contactor, the calculation of the dynamic characteristics of the contactor considering the collision and bounce is completed based on the piecewise linear structural dynamic equation. The cross-section of the contactor is shown in figure 2 As shown, the relevant parameters of the contactor are: rated coil voltage 28V, rated coil current 0.7A, coil resistance 40Ω, coil turns 2100 turns, reduced mass of electromagnetic moving parts 0.02Kg, armature travel 2.7e-3m, contact opening The distance is 1.7e-3m, the magnetic material is DT4E, the preload of the overtravel spring is 7N, and the preload of the return spring is 6N.

[0129] 2. Calculation process

[0130] (1) According to the actual size and installation requirements of the contactor, establish a three-dimensional model of the contactor, simplify the model, and complete the establishment of the electromagnetic physical model in FLUX and ...

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Abstract

Provided is a method for calculating dynamic characteristics of a contactor based on a piecewise linear kinetic equation, and belongs to the technical field of basic research design of general characteristics of contactors. The method comprises the steps that according to structural features of the contactor, segmentation is conducted on a contactor action process, plane collision and a continuouscollision force model with energy loss considered are used for being equivalent to a collision process, by means of the multi-body system kinematics based on a restrain method and a dynamic method, studying of the collision bounce situation of a contactor mechanical system under the action of external force is completed, and finally, dynamic characteristic calculation of the contactor with collision bounce considered is completed in combination of a coupling calculation method. The method has the advantages that the time-dependent situation of electromagnetic parameters such as the coil current and electromagnetic force in a working process of the contactor can be obtained, the electromagnetic dynamic characteristics of the contactor can be reflected more accurately, and errors are controlled within 5%; the bounce situation of an armature and a moving contact of the contactor can be reflected more really, and errors are controlled within 5%.

Description

technical field [0001] The invention belongs to the technical field of common basic research and design of contactors, and in particular relates to a method for calculating dynamic characteristics of contactors based on piecewise linear dynamic equations. Background technique [0002] Contactors are mainly used for frequent switching on of the main circuit and on-off switching of large-capacity control circuits under normal conditions. The performance of the contactor is related to the stability of the entire circuit system. The dynamic characteristics of the contactor include electromagnetic dynamic characteristics and mechanical structure dynamic characteristics, which are important indicators to measure the reliability of the contactor. Bouncing is an unavoidable phenomenon of switching devices. The short-term separation of moving and static contacts caused by it is very easy to aggravate electrode erosion and deteriorate the contact environment in the case of arcing. It ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23G06F2111/04
Inventor 杨文英刘兰香刘洋梅发斌翟国富
Owner HARBIN INST OF TECH
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