Relay arc simulation system

Abstract

The invention discloses a relay arc simulation system, and relates to the technical field of charging piles, energy storage and motor control. The system comprises an input module, a model construction module, a fluid and electromagnetic control module, a simulation calculation module, a morphological analysis module, a magnetic field and airflow field analysis module, a data verification module and a result processing module. According to the invention, by inputting the data of the relay into the simulation system and comparing the simulation result of the simulation system with the existing experimental data in a large amount, the simulation effect of the electric arc of the relay is simulated, the simulation process has no influence on the relay, and the situation that the relay is destructively damaged in the simulation process is avoided; the electric arc of the relay is simulated through the simulation system, and the test time is short, so that the research and development production efficiency of the relay is improved, normalized full inspection can be performed on different types of relays, and the qualified rate of the researched and developed relays is improved.

Description

Technical Field

[0001] The present invention relates to the technical fields of charging piles, energy storage and motor control, and in particular to a relay arc simulation system. Background Art

[0002] A relay is an electrical control device. When the change of the input quantity (excitation quantity) reaches the specified requirement, it causes the controlled quantity to undergo a predetermined step change in the electrical output circuit. It has an interactive relationship between the control system (also called the input circuit) and the controlled system (also called the output circuit). It is usually used in automated control circuits. It is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit. At present, the testing and capture of relay arc can only be obtained by testing the actual load observation. In actual applications, a certain proportion of samples need to be extracted during the relay development and production process, and arc tests are performed in the laboratory according to the actual load power of the relay. This test method has two detailed defects; This test method will cause destructive damage to the relay, making the relay unusable and greatly increasing the manufacturing cost of the relay; The testing time is long, which reduces R&D and production efficiency; This test method can only be used for random inspections, and cannot be used for regular full inspections of all relays, and cannot ensure 100% compliance. In view of the above problems, the inventor proposes a relay arc simulation system to solve the above problems. Summary of the invention

[0003] In order to solve the above problems, the object of the present invention is to provide a relay arc simulation system.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a relay arc simulation system, the simulation system comprising: An input module, wherein the input module is used to set relay models, parameters and simulation conditions; Model building module, which builds the arc model according to the input parameters and sets the initial conditions and boundary conditions; Fluid and electromagnetic control module, used for coupling calculation of fluid and electromagnetic field to ensure the accuracy of simulation results; A simulation calculation module is used for discretization of arc models and simulation through computer programs; The morphology analysis module is used to analyze the morphology of the arc at different stages and reflect the dynamic behavior of the arc; Magnetic field and airflow field analysis module, used to analyze the influence of magnetic field and airflow field on arc shape and motion trajectory; Data verification module, used for comparison and verification between simulation results and experimental data; The result processing module is used to generate visualization charts and reports of simulation results.

[0005] Preferably, the data input by the input module includes basic material data, material data and structural data of the relay.

[0006] Preferably, the initial conditions set by the model building module include the initial position of the arc, the size of the arc, the temperature of the arc and the current density distribution, and the boundary conditions set by the model building module include electrode material properties, cooling conditions, gas type and gas pressure.

[0007] Preferably, the fluid and electromagnetic control module describes the flow state of the gas around the arc and the influence of the magnetic field generated by the arc on the arc shape and motion trajectory, and realizes the coupling calculation of the fluid and the electromagnetic field by solving the Navier-Stokes equations and the Maxwell equations to ensure the accuracy of the simulation results.

[0008] Preferably, the flow state of the gas includes gas flow velocity, temperature distribution and pressure change.

[0009] Preferably, the discretization processing method of the arc model includes a finite difference method, a finite element method and a finite product method.

[0010] Preferably, the shapes of the arc at different stages include arc length, arc diameter, arc brightness and arc temperature distribution.

[0011] Preferably, the magnetic field and airflow field analysis module affects the arc movement direction by acting on arc plasma through the Lorentz force, and accelerates the cooling and extinction of the arc through thermal convection and arc blowing effects.

[0012] Preferably, the data verification module compares and verifies the simulation results with the experimental data, optimizes the simulation model through continuous comparison and analysis, improves the simulation accuracy, and evaluates the accuracy of the simulation model.

[0013] Preferably, the experimental data is acquired through an arc experimental platform, and the experimental data includes arc voltage, current waveform and arc graph.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the data of the relay is input into the simulation system, and the simulation results of the simulation system are compared with the existing experimental data in large quantities to simulate the simulation effect of the relay arc. The simulation process has no effect on the relay, thus avoiding destructive damage to the relay during the simulation process. 2. In the present invention, the arc of the relay is simulated by the simulation system, and the test time is short, thereby improving the research and development and production efficiency of the relay; 3. In the present invention, by using the simulation technology of the simulation system, it is possible to perform regular full inspection on different types of relays, thereby improving the qualification rate of the relays developed and produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The present invention is a schematic diagram of the composition of a relay arc simulation system.

[0017] In the figure: 100, input module; 200, model building module; 300, fluid and electromagnetic control module; 400, simulation calculation module; 500, morphological analysis module; 600, magnetic field and airflow field analysis module; 700, data verification module; 800, result processing module. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example: Figure 1 As shown, the present invention provides a relay arc simulation system, the simulation system comprising: An input module 100, wherein the input module 100 is used to set the relay model, parameters and simulation conditions, and the data input by the input module 100 includes basic material data, material data and structural data of the relay; The model building module 200 builds an arc model according to the input parameters and sets initial conditions and boundary conditions. The initial conditions include the initial position of the arc, the size of the arc, the temperature of the arc and the current density distribution. The boundary conditions include electrode material properties, cooling conditions, gas type and gas pressure. The fluid and electromagnetic control module 300 is used for coupling calculation of fluid and electromagnetic field to ensure the accuracy of simulation results. The fluid and electromagnetic control module 300 describes the flow state of gas around the arc and the influence of the magnetic field generated by the arc on the arc shape and motion trajectory, and realizes the coupling calculation of fluid and electromagnetic field by solving Navier-Stokes equations and Maxwell equations. The flow state of gas includes airflow velocity, temperature distribution and pressure change; The simulation calculation module 400 is used for discretization processing of the arc model, wherein the discretization processing methods include finite difference method, finite element method and finite product method, and simulation is performed through a computer program; A morphology analysis module 500 is used for morphology analysis of the arc at different stages. The morphology of the arc at different stages includes arc length, arc diameter, arc brightness and arc temperature distribution, which reflects the dynamic behavior of the arc. The magnetic field and airflow field analysis module 600 is used to analyze the influence of the magnetic field and airflow field on the arc shape and motion trajectory, to affect the arc motion direction by Lorentz force acting on arc plasma, and to accelerate the cooling and extinction of the arc by thermal convection and arc blowing effect; The data verification module 700 is used for comparing and verifying the simulation results with the experimental data. The experimental data is obtained through the arc experiment platform. The experimental data includes arc voltage, current waveform and arc graph. The data verification module 700 compares and verifies the simulation results with the experimental data. Through continuous comparison and analysis, the simulation model is optimized to improve the simulation accuracy and evaluate the accuracy of the simulation model. The result processing module 800 is used to generate visualization charts and reports of simulation results.

[0020] Working principle: When simulating the relay arc, the input module 100, model building module 200, fluid and electromagnetic control module 300, simulation calculation module 400, morphological analysis module 500 and magnetic field and airflow field analysis module 600 in this simulation system perform data analysis based on the relay principle, structure, component characteristics, materials, mechanical parameters, motion trajectory, etc., and conduct a large number of comparisons with existing experimental data through the data verification module 700 to simulate the simulation effect of the relay arc. The simulation process has no effect on the relay. Compared with the existing technology, it avoids destructive damage to the relay during the simulation process. At the same time, the test time is short, thereby improving the R&D and production efficiency, and can perform regular full inspections on different types of relays to improve the pass rate of relays developed and produced.

[0021] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A relay arc simulation system, It is characterized in that The simulation system comprises: An input module (100), the input module (100) being used to set a relay model, parameters and simulation conditions; A model building module (200) builds an arc model according to input parameters and sets initial conditions and boundary conditions; A fluid and electromagnetic control module (300), used for coupling calculation of fluid and electromagnetic field to ensure the accuracy of simulation results; A simulation calculation module (400) is used for discretization processing of the arc model and simulation through a computer program; A morphology analysis module (500), used for morphology analysis of the arc at different stages, reflecting the dynamic behavior of the arc; A magnetic field and airflow field analysis module (600), used to analyze the influence of the magnetic field and airflow field on the arc shape and motion trajectory; A data verification module (700) is used for comparing and verifying simulation results with experimental data; The result processing module (800) is used to generate visualization charts and reports of simulation results.

2. A relay arc simulation system as claimed in claim 1, It is characterized in that The data input by the input module (100) includes basic material data, material data and structural data of the relay.

3. A relay arc simulation system as claimed in claim 1, It is characterized in that The initial conditions set by the model building module (200) include the initial position of the arc, the size of the arc, the temperature of the arc and the current density distribution, and the boundary conditions set by the model building module (200) include electrode material properties, cooling conditions, gas type and gas pressure.

4. A relay arc simulation system as claimed in claim 1, It is characterized in that The fluid and electromagnetic control module (300) describes the flow state of the gas around the arc and the influence of the magnetic field generated by the arc on the arc shape and motion trajectory, and realizes the coupling calculation of the fluid and the electromagnetic field by solving the Navier-Stokes equations and the Maxwell equations, thereby ensuring the accuracy of the simulation results.

5. A relay arc simulation system as claimed in claim 4, It is characterized in that The flow state of the gas includes gas flow velocity, temperature distribution and pressure change.

6. A relay arc simulation system as claimed in claim 1, It is characterized in that The discretization processing methods of the arc model include finite difference method, finite element method and finite product method.

7. A relay arc simulation system as claimed in claim 1, It is characterized in that The shapes of the arc at different stages include arc length, arc diameter, arc brightness and arc temperature distribution.

8. A relay arc simulation system as claimed in claim 1, It is characterized in that The magnetic field and airflow field analysis module (600) affects the arc movement direction by acting on arc plasma through the Lorentz force, and accelerates the cooling and extinction of the arc through thermal convection and arc blowing effects.

9. A relay arc simulation system as claimed in claim 1, It is characterized in that The data verification module (700) compares and verifies the simulation results with the experimental data, optimizes the simulation model through continuous comparison and analysis, improves the simulation accuracy, and evaluates the accuracy of the simulation model.

10. A relay arc simulation system as claimed in claim 9, It is characterized in that The experimental data are obtained through an arc experimental platform, and the experimental data include arc voltage, current waveform and arc graph.

Images