Method for measuring power connector contact temperature rise based on finite element analysis of three-dimensional thermal field

A power connector and three-dimensional thermal field technology, applied in the field of measurement, can solve problems such as the difficulty of reflecting the growth trend of contact temperature rise in real time, and the inability to obtain accurate data on contact temperature rise, connector reliability, etc., and achieve the goal of shortening the temperature rise test Time, convenient calculation of contact temperature rise, and the effect of efficiency improvement

Inactive Publication Date: 2010-09-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since there is only a qualitative relationship between the contact resistance value and the temperature rise of the contact, and it is difficult to reflect the growth trend of the contact temperature rise in real time thr

Method used

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  • Method for measuring power connector contact temperature rise based on finite element analysis of three-dimensional thermal field
  • Method for measuring power connector contact temperature rise based on finite element analysis of three-dimensional thermal field

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Example Embodiment

[0014] Example 1: Combining figure 1 , the present invention is based on the three-dimensional thermal field finite element analysis of the power connector contact temperature rise measurement method, the steps are as follows:

[0015] Step 1: Use the finite element simulation analysis software ANSYS to establish a three-dimensional thermal field model of the power connector, use the contact resistance value and the size of the contact area to establish the equivalent body model of the contact resistance through calculation, conduct transient thermal-electric coupling simulation analysis, and output the connection The temperature field distribution diagram of the connector, the instantaneous value and time-varying curve of the temperature of the connector contact and the temperature of the contact terminal;

[0016] Step 2: Perform data processing on the temperature of all nodes on the end face of the connector contact and the temperature of all nodes at the end of the contact...

Example Embodiment

[0021] Embodiment 2: The method for measuring the temperature rise of the contacts of the power connector based on the three-dimensional thermal field finite element analysis of the present invention includes the following contents:

[0022] (1) Use the finite element simulation analysis software ANSYS to establish a three-dimensional thermal field model of the power connector, and perform transient thermal-electric coupling simulation analysis, including selecting the unit type of the model and defining the material properties of the model; establishing a geometric model of the power connector; Using the contact resistance value and the size of the contact area, the equivalent body model of the contact resistance is established through calculation; the grid division accuracy is selected, and the grid is divided; the temperature boundary conditions, voltage boundary conditions and applied current load are set; the time step of the solution is set and carried out Transient therm...

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Abstract

The invention provides a method for measuring power connector contact temperature rise based on finite element analysis of a three-dimensional thermal field. The method is used for displaying the measuring result and the room temperature in real time, is convenient for computing the contact temperature rise and is used for judging whether the connector is qualified or not with the testing standard. The method comprises the following steps: establishing a three-dimensional thermal field model of the power connector by utilizing finite element simulation analysis software (ANSYS), establishing a contact resistance equivalent phantom model through computation of the contact resistance and the contact area; carrying out data processing on the temperature of all the nodes on the end face of the connector contact and the temperature of all the nodes at the end of the contact wiring, wherein the temperature is obtained by simulation; verifying the correctness of the model by comparing the above temperature with the instantaneous value, which is measured in test, of the temperature at the end of the connector contact wiring; and an upper computer selecting one phase for measuring. The method can be used for displaying the measuring result and the room temperature in real time, is convenient for computing the contact temperature rise and can be used for judging whether the connector is qualified or not.

Description

(1) Technical field [0001] The invention relates to measurement technology, in particular to a method for measuring temperature rise of electric connector contacts based on three-dimensional thermal field finite element analysis. (2) Background technology [0002] Power connectors are electrical connection devices specially used in railway vehicles, urban rail vehicles and industrial electrical systems. The railway passenger car power connector is a key electrical appliance for train power supply, and its performance directly affects the service quality and operation safety of the train. According to the railway industry standard TB / T 2408-93, the contact resistance of the power connector should be within the range of 0-0.8mΩ. However, when the power connector fails, as the contact resistance increases, the Joule heat generated by the contact resistance is enough to make the temperature of the contact surface rise sharply, and even exceed the temperature resistance range of...

Claims

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Application Information

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IPC IPC(8): G01K13/00G06F17/50
Inventor 王淑娟胡方杨文英韩笑胡彪翟国富
Owner HARBIN INST OF TECH
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