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Prediction method of qualified rate of contactor moving contact overtravel time based on Monte Carlo simulation

A technology of Monte Carlo simulation and prediction method, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of high design and test costs, long design cycles, etc., to reduce test costs and improve reliability. , the effect of shortening the trial production cycle

Active Publication Date: 2015-12-23
HARBIN INST OF TECH +1
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that in the design process of the existing contactor, it is necessary to make samples according to the design drawings to be able to inspect the parameters of the overtravel time of the moving contact. For the problem of high cost, the present invention provides a method for predicting the qualification rate of overtravel time of moving contact based on Monte Carlo simulation.

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  • Prediction method of qualified rate of contactor moving contact overtravel time based on Monte Carlo simulation
  • Prediction method of qualified rate of contactor moving contact overtravel time based on Monte Carlo simulation
  • Prediction method of qualified rate of contactor moving contact overtravel time based on Monte Carlo simulation

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specific Embodiment approach 1

[0041] Specific implementation mode one, see figure 1 This embodiment will be described. A method for predicting the qualified rate of the overtravel time of the moving contact of the contactor based on Monte Carlo simulation described in this embodiment, the method includes the following steps:

[0042]Step 1: According to the design documents and process drawings, obtain the design values ​​of size parameters, design values ​​of design parameters, design values ​​of adjustment parameters and the tolerance range of each parameter that affect the overtravel time of the moving contact of the contactor, according to the independent and identical distribution The central limit theorem uses MATLAB to generate N groups of three types of parameter combinations that vary within the tolerance range and conform to the normal distribution: size parameters, design parameters, and adjustment parameters. The parameter N is an integer greater than or equal to 1000;

[0043] Step 2: Combini...

specific Embodiment approach 2

[0048] Specific implementation mode two, see figure 2 This embodiment will be described. The difference between this embodiment and the Monte Carlo simulation-based method for predicting the pass rate of the overtravel time of the contactor moving contact described in the first embodiment is that the module for obtaining the overtravel time of the contactor moving contact adopts software technology Implementation, the working process of this module includes the following steps:

[0049] Step A, setting the calculation parameters of the contactor model and initializing the characteristic parameters;

[0050] Step B, calculating the flux linkage at the current moment from the integral of the coil voltage, current and flux linkage at the previous moment;

[0051] Step C, obtaining the coil current from the coil flux linkage and armature displacement look-up table;

[0052] Step D, the coil current and armature displacement obtained in step C are checked in the comparison tabl...

specific Embodiment approach 3

[0064] Specific Embodiment 3. The difference between this embodiment and the Monte Carlo simulation-based method for predicting the qualified rate of overtravel time of contactor moving contacts described in Embodiment 2 is that the comparison table is the contactor coil magnetic A two-dimensional table about the coil current and the armature displacement, which is obtained by the following steps:

[0065] Step H, establish a three-dimensional model of the electromagnetic mechanism in the UG software according to the design drawing of the electromagnetic mechanism of the contactor;

[0066] Step 1, through the software finite element software FLUX, according to the three-dimensional model of the electromagnetic mechanism, calculate the coil current, armature displacement, electromagnetic attraction force and flux linkage of multiple groups of contactors;

[0067] Step J, according to step I, obtain the coil current, armature displacement, electromagnetic attraction force and f...

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Abstract

A method for predicting the over travel time yield of a movable contact of a contactor and based on the Monte Carlo simulation belongs to the technical field of contactor detection. The method solves the problems of high design and test cost and long design period caused by the fact that processing and manufacturing of samples are required in the existing method for checking over travel time parameters in a contactor design process. The method includes determining three parameter design values affecting over travel time, an upper limit and a lower limit according to a contactor design file, adopting an independent identically distributed central-limit theorem to produce N groups of parameter combinations through the matrix laboratory (MATLAB), obtaining N groups of over travel time characteristic parameters according to the N groups of parameter combinations to further obtain a distribution characteristic of the over travel time parameters and finally obtaining the over travel time yield of the contactor according to the distribution characteristic and the over travel time design parameters of the contactor through a Simpson rule. The method is suitable to predict and analyze the over travel time yield of the contactor in a design link of the contactor and further provides a basis for a designer of the contactor to modify design parameters.

Description

technical field [0001] The invention belongs to the field of contactors, and relates to a method for calculating the qualified rate of overtravel time of a moving contact, in particular to a method for analyzing the qualified rate of overtravel time of a moving contact of a contactor based on Monte Carlo simulation. Background technique [0002] The overtravel time of the moving contact is the most important basic parameter of the contactor. It is an important factor in determining the on-off current capability of the contactor. It can be directly determined whether the contactor is qualified according to this parameter. Article 7.2.6 of "TB / T2767-2010 DC Contactors for Locomotives" clearly stipulates that "the manufacturer shall provide the overtravel time of the moving contact of the contactor under the rated control power supply voltage and nominal air pressure". However, in actual product development, due to the complexity of the actual mechanism, various parameters incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 翟国富杨文英肖斌杜英玮王珏梁慧敏
Owner HARBIN INST OF TECH
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