A contactor verification method and device

Abstract

The embodiment of the present invention provides a verification method and device for a contactor, wherein the verification method includes: determining the coil parameters of the electromagnetic mechanism in the initial contactor; determining the coil window size of the coil based on the coil parameters and in combination with the coil wire parameters, wherein the coil wire parameters are the parameters of the wire in the coil; generating a coil skeleton model in a three-dimensional modeling software based on the structure and coil window size of the initial contactor; generating a corresponding contactor model based on the coil skeleton model, wherein the contactor model includes at least an electromagnetic mechanism model and a contact system model; and testing the contactor model using simulation parameters to realize verification of the contactor. The embodiment of the present invention can reduce the verification cost of collision and bounce of the electromagnetic mechanism and accelerate the process of research, development and manufacturing of the contactor.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of contactors, and in particular to a verification method and device for a contactor. Background Art

[0002] Contactors are one of the important basic components in the electrical industry and are widely used in automatic control and power systems to transmit and distribute electric energy and protect and control electrical equipment. As the complexity of power systems and control requirements continue to increase, the performance requirements for contactors are also increasing.

[0003] The electromagnetic mechanism in the contactor is the action execution part. It controls the connection and disconnection of the main circuit through the electromagnetic attraction generated when the excitation coil is energized and the spring reaction force. The performance of the electromagnetic mechanism directly determines the performance of the entire contactor. Therefore, the research and development and optimization design of the electromagnetic mechanism are crucial to the contactor.

[0004] At present, the verification process of the collision and bounce of the electromagnetic mechanism is relatively complicated, and the research and development and manufacturing time cycle of the electromagnetic mechanism is long. Therefore, it is urgent to provide a rapid verification method for the contactor to solve the above problems. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a contactor verification method and device, which simplifies the verification process of collision and bounce of an electromagnetic mechanism, shortens the development time and reduces the verification cost.

[0006] To achieve the above objectives, in a first aspect, an embodiment of the present invention provides a contactor verification method, comprising:

[0007] Determine coil parameters of the electromagnetic mechanism in the initial contactor;

[0008] Determining a coil window size of the coil based on coil parameters in combination with coil wire parameters, wherein the coil wire parameters are parameters of the wire in the coil;

[0009] Based on the initial contactor structure and coil window size, a coil skeleton model is generated in a 3D modeling software;

[0010] Based on the coil skeleton model, a corresponding contactor model is generated, wherein the contactor model at least includes an electromagnetic mechanism model and a contact system model;

[0011] The contactor model is tested using simulation parameters to verify the contactor.

[0012] Optionally, the contactor includes at least an electromagnetic mechanism, a coil frame and a contact system, the electromagnetic mechanism includes at least an excitation coil, a moving iron core, a stationary iron core and a reaction spring, the contact system includes at least a contact spring, a moving contact and a stationary contact, and determining the coil parameters of the electromagnetic mechanism in the contactor includes:

[0013] The spring reaction force of the contactor is calculated based on the moving iron core and the stationary iron core, the contact opening distance, the stiffness coefficient of the reaction spring and the contact spring, and the initial compression of the contact spring. The contact opening distance is the maximum distance between the moving and stationary contacts.

[0014] According to the iron core structure of the contactor, the electromagnetic attraction under the condition of constant magnetic potential is calculated, wherein the iron core structure includes the moving iron core and the stationary iron core of the contactor;

[0015] Calculate the excitation ampere-turns of the contactor according to the spring reaction force and the electromagnetic attraction of the contactor, wherein the excitation ampere-turns include a first excitation ampere-turn and a second excitation ampere-turn, wherein the first excitation ampere-turn is the excitation ampere-turn when the contactor is in a starting state, and the second excitation ampere-turn is the excitation ampere-turn when the contactor is in a holding state;

[0016] determining a reference current in a holding state based on the second excitation ampere-turn;

[0017] The corresponding number of coil turns is determined based on the reference current in the holding state.

[0018] Optionally, determining the coil window size of the coil based on the coil parameters in combination with the coil wire parameters includes:

[0019] Based on the number of coil turns, calculate the coil current density of the contactor in the starting state;

[0020] Screening wire gauge based on coil current density;

[0021] The corresponding coil window size is determined based on the wire specification of the wire, the filling factor of the wire and the coil skeleton thickness.

[0022] Optionally, the process of forming the electromagnetic mechanism model includes:

[0023] determining an initial model of the electromagnetic mechanism based on the parameters;

[0024] The initial model of the electromagnetic mechanism is imported into the electromagnetic field finite element analysis software, and the material properties of the excitation coil, moving iron core, static iron core and reaction spring in the electromagnetic mechanism are added and the mechanical properties are set to form the electromagnetic mechanism model.

[0025] Optionally, the contactor model is formed by splicing an electromagnetic mechanism model, a contact system model and a coil skeleton model;

[0026] The contactor model also includes a motion bracket model, and the contactor model is formed by splicing the motion bracket model, the electromagnetic mechanism model, the contact system model and the coil skeleton model.

[0027] Optionally, the contactor model is tested by using simulation parameters to verify the contactor, including:

[0028] By modifying the numerical values ​​of simulation parameters and combining the interfaces in electromagnetic field finite element analysis software and dynamic simulation software, the contactor model is tested to achieve contactor verification.

[0029] Optionally, also include:

[0030] It is determined whether the verification result meets expectations. If not, the coil parameters are modified and the verification process is continued until the verification result meets expectations, where the expectation is that the collision and bounce of the core and the contact are within a threshold range.

[0031] Optionally, after determining whether the verification result meets expectations, the method further includes:

[0032] Based on the coil parameters, modeling is performed in a three-dimensional modeling software to obtain a coil skeleton model;

[0033] Print the coil skeleton using 3D printing technology;

[0034] Assembling to obtain a contactor;

[0035] The contactor is powered on and tested to verify the contactor.

[0036] In a second aspect, an embodiment of the present invention provides a contactor verification device, comprising:

[0037] A coil parameter determination module, used to determine the coil parameters of the electromagnetic mechanism in the initial contactor;

[0038] A window size calculation module, for determining a coil window size of the coil based on coil parameters in combination with coil wire parameters, wherein the coil wire parameters are parameters of the wire in the coil;

[0039] A coil skeleton generation module is used to generate a coil skeleton model in a 3D modeling software based on the structure of the initial contactor and the coil window size;

[0040] A contactor generation module is used to generate a corresponding contactor model based on the coil skeleton model, wherein the contactor model at least includes an electromagnetic mechanism model and a contact system model;

[0041] The test module is used to test the contactor model using simulation parameters to verify the contactor.

[0042] The embodiment of the present invention provides a verification method for a contactor, by determining the coil parameters of the electromagnetic mechanism in the initial contactor; based on the coil parameters, combined with the coil wire parameters, the coil window size of the coil is determined, and the coil wire parameters are the parameters of the wire in the coil; based on the structure of the initial contactor and the coil window size, a coil skeleton model is generated in a three-dimensional modeling software; based on the coil skeleton model, a corresponding contactor model is generated, wherein the contactor model at least includes an electromagnetic mechanism model and a contact system model; the contactor model is tested using simulation parameters to realize the verification of the contactor. The above verification method in the embodiment of the present invention can simulate the collision bounce of the electromagnetic mechanism during the collision process to the greatest extent, simplify the verification process of the collision bounce, and save the research and development cost of the electromagnetic mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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 embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0044] Figure 1 A schematic diagram of the steps of a contactor verification method provided by an embodiment of the present invention.

[0045] Figure 2 A schematic diagram of components of a contactor provided in an embodiment of the present invention.

[0046] Figure 3 A schematic diagram of the dimensions of a coil window provided in an embodiment of the present invention.

[0047] Figure 4 A schematic diagram of a verification process provided by an embodiment of the present invention.

[0048] Figure 5 A schematic diagram of a contactor verification device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] 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 application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] As described in the background technology, at present, the verification process of the collision and bounce ability of the electromagnetic mechanism is relatively complicated, and the accuracy of measuring the collision and bounce ability is low. For example, when the electromagnetic mechanism is calculated using the electromechanical coupling calculation method, a single electromagnetic field simulation is basically used to obtain a two-dimensional interpolation table of the electromagnetic switch displacement, current and suction, and then the electromagnetic suction calculated by interpolation is substituted into the mechanical motion equation for solution. However, this method cannot truly reflect the impact of the collision and bounce of each moving part in the contactor on the electromagnetic parameters, and collision and bounce are one of the main factors affecting the mechanical life and electrical life of the contactor.

[0051] It should also be noted that the research and development and design of electromagnetic mechanisms often require the manufacture and testing of physical objects to verify their rationality and accuracy. However, the current traditional research and development design model using the manufacture and testing of physical objects has a long development cycle and high manufacturing costs, which cannot meet the needs of market development.

[0052] Based on the above problems, the inventors have discovered that it is possible to pre-calculate important parameters related to the electromagnetic mechanism, and utilize a multi-field dynamic characteristics joint simulation method of electromagnetic field-mechanical force field coupling calculation to fully verify the electromagnetic mechanism design scheme, thereby providing a certain theoretical basis for the research and development and design of the electromagnetic mechanism of small contactors.

[0053] Specifically, an embodiment of the present invention provides a verification method for a contactor, by determining the coil parameters of the electromagnetic mechanism in the initial contactor; based on the coil parameters, combined with the coil wire parameters, the coil window size of the coil is determined, and the coil wire parameters are the parameters of the wire in the coil; based on the structure of the initial contactor and the coil window size, a coil skeleton model is generated in a three-dimensional modeling software; based on the coil skeleton model, a corresponding contactor model is generated, wherein the contactor model at least includes an electromagnetic mechanism model and a contact system model; the contactor model is tested using simulation parameters to verify the contactor. The above verification method in the embodiment of the present invention can simulate the collision bounce of the electromagnetic mechanism during the collision process to the greatest extent, simplify the verification process of the collision bounce, and save the research and development cost of the electromagnetic mechanism.

[0054] The technical solution in this application will be described in detail below.

[0055] The verification method of the contactor in the embodiment of the present invention can refer to Figure 1 , which may specifically include:

[0056] Step S11, determining coil parameters of the electromagnetic mechanism in the initial contactor;

[0057] The initial contactor is the initial structure of the contactor, which may only include the coil skeleton of the contactor. In one embodiment, the coil parameters may be determined based on the coil skeleton. In other optional embodiments, the coil parameters of the electromagnetic mechanism may also be determined based on the electromagnetic mechanism, coil skeleton and contact system included in the contactor. This is not limited here.

[0058] Step S12, determining the coil window size of the coil based on the coil parameters and the coil wire parameters, wherein the coil wire parameters are the parameters of the wire in the coil;

[0059] Step S13, generating a coil skeleton model in a three-dimensional modeling software based on the structure of the initial contactor and the size of the coil window;

[0060] Step S14: generating a corresponding contactor model based on the coil skeleton model, wherein the contactor model at least includes an electromagnetic mechanism model and a contact system model;

[0061] Step S15: Testing the contactor model using simulation parameters to verify the contactor.

[0062] like Figure 2 As shown, the contactor to be generated includes at least an electromagnetic mechanism 100, a coil frame 200 and a contact system 300, wherein the electromagnetic mechanism 100 includes at least an excitation coil 110, a moving iron core 120, a stationary iron core 130 and a reaction spring 140, and the contact system 300 includes at least a contact spring 310, a moving contact 320 and a stationary contact 330.

[0063] In an optional embodiment, the contactor may further include a moving bracket 400 , and the moving bracket 400 is located at the center of the contactor.

[0064] In the embodiment of the present invention, in step S11, determining the coil parameters of the electromagnetic mechanism in the contactor includes:

[0065] Step S111, calculating the spring reaction force of the contactor based on the moving iron core and the stationary iron core, the contact opening distance, the reaction force spring and the stiffness coefficient of the contact spring, and the initial compression amount of the contact spring, wherein the contact opening distance is the maximum distance between the moving and stationary contacts;

[0066] Optionally, by measuring the moving and static iron cores and contact opening distances of the contactor, the reaction spring and contact spring stiffness coefficients and the initial compression, the spring reaction force of the contactor can be obtained as shown in the following formula:

[0067]

[0068] Where, f is the spring reaction force; f1 is the reaction spring preload value; f2 is the contact spring preload value; y1 is the moving iron core displacement; y ky is the contact opening distance; x is the stroke of the moving iron core; k1 is the stiffness coefficient of the reaction spring; k2 is the stiffness coefficient of the contact spring; a and b are the number of reaction springs and contact springs respectively.

[0069] Step S112, calculating the electromagnetic attraction under the condition of constant magnetic potential according to the iron core structure of the contactor, wherein the iron core structure includes a moving iron core and a stationary iron core of the contactor;

[0070] The calculation formula of electromagnetic attraction under constant magnetic potential condition can be derived from the iron core structure of the contactor:

[0071]

[0072] Among them, F m is the electromagnetic attraction; I and N are the coil current and number of turns; μ0 is the air magnetic permeability; A is the area of ​​the magnetic pole cross section; δ is the air gap between the moving and static iron cores.

[0073] Step S113, calculating the excitation ampere-turns of the contactor according to the spring reaction force and the electromagnetic attraction of the contactor, wherein the excitation ampere-turns include a first excitation ampere-turn and a second excitation ampere-turn, wherein the first excitation ampere-turn is the excitation ampere-turn when the contactor is in a starting state, and the second excitation ampere-turn is the excitation ampere-turn when the contactor is in a holding state.

[0074] In one embodiment, the equivalent form of the contactor magnetic circuit voltage balance equation is as follows:

[0075]

[0076] Where Ldi / d t is the self-induced electromotive force of the magnetic circuit inductance, idL / d t It is the moving back electromotive force, which changes all the time as the moving iron core moves.

[0077] According to the electromagnetic attraction calculation formula 2 of the contactor, the excitation ampere-turn calculation formula can be obtained as follows:

[0078]

[0079] When the contactor is in the disconnected position, according to the contactor structural parameters, take δ = 4.3mm, Fm ≈ 2N, A = 147.20mm2, then the excitation ampere-turns IN is:

[0080]

[0081] When the contactor is in the energized position, the moving and static cores are not absolutely energized, but there is a tiny air gap of about 0.01 to 0.1 mm. Take δ = 0.1 mm, Fm ≈ 9.76 N, A = 147.20 mm2, and the excitation ampere-turns IN in the holding state is:

[0082]

[0083] Step S114, determining a reference current in a holding state based on the second excitation ampere-turns;

[0084] Optionally, the current range of the reference current is not greater than 3 times the critical holding current. In an embodiment of the present invention, when the holding reference current is set to 3 times the critical holding current, it is possible to ensure that the contacts are reliably held while avoiding additional losses. The calculation method of the holding current can be as shown above, which can be understood as the current in the closed position.

[0085] Step S115, determining the corresponding number of coil turns based on the reference current in the holding state.

[0086] Continuing with the above embodiment, if it can be satisfied that when in the disconnected position, δ=4.3mm, IN=895, and when in the attracted position, δ=0.1mm, IN=138, then the contactor can work reliably. Take I=0.3A in the starting position, then N≈460 turns. If N=460 turns, then I=895 / 460=1.95A in the disconnected position. Take I=2A to select the coil wire, and select the current density as J=15A / mm2, then the wire area corresponding to the 2A current is about 0.13mm2, and the wire diameter is 0.4mm.

[0087] In the embodiment of the present invention, in step S12, determining the coil window size of the coil based on the coil parameters and in combination with the coil wire parameters includes:

[0088] Based on the number of coil turns, calculate the coil current density of the contactor in the starting state;

[0089] Screening wire gauge based on coil current density;

[0090] The corresponding coil window size is determined based on the wire specification of the wire, the filling factor of the wire and the coil skeleton thickness.

[0091] It should be noted that during the manufacturing process of the wire, the insulation layer of the wire will inevitably occupy a part of the area, so this must be taken into account in the coil design. According to the standard IEC 60317, the filling factor of the 0.4mm diameter enameled wire is 0.716. Therefore, when the number of coil turns is 460, the coil window area is:

[0092]

[0093] The measurement of the size of the static iron core shows that the window area between the column and the side column of the static iron core is 8.90×18.96mm 2After reserving the thickness of the coil frame, the coil window is designed to be 4×20.20mm 2 The rectangle is shown in Figure 3 As shown, the outline refers to the E-type iron core, which is symmetrical on the left and right. Only the right half is shown in the figure. The shaded part is the designed rectangular coil cross section, also known as the coil window, and its size a*b can be 4mm*20.20mm.

[0094] In the embodiment of the present invention, in step S14, the process of forming the electromagnetic mechanism model includes:

[0095] determining an initial model of the electromagnetic mechanism based on the parameters;

[0096] The initial model of the electromagnetic mechanism is imported into the electromagnetic field finite element analysis software, and the material properties of the excitation coil, moving iron core, static iron core and reaction spring in the electromagnetic mechanism are added and the mechanical properties are set to form the electromagnetic mechanism model.

[0097] The excitation coil is the aforementioned coil. In an optional embodiment, the size, number of turns and resistance of the excitation coil can be set to form an excitation coil.

[0098] In an optional embodiment, the material properties of the moving iron core and the stationary iron core may be 50ww600 silicon steel sheet; the material properties of the excitation coil may be copper, which is not limited here.

[0099] In an optional embodiment, in the "Plant Input" window of the multi-body dynamics analysis software, the electromagnetic suction force is selected as the input, in the "Plant Output" window, the displacement and speed of the moving iron core, the displacement and speed of the moving contact are selected as the output, in the "CoSim Simulink" setting window, Simulink is selected as the main program, and the .m file is output to realize the interaction with Simulink;

[0100] In an optional embodiment, enter "rdlib" and then the RecurDyn model name in the Matlab command line to call the RecurDyn plant block module and link the .m file mentioned above, and enter the absolute path of the .F2MS file mentioned above in the Coupling withFlux module in the Simulink library;

[0101] In an optional embodiment, the electromagnetic attraction output by the Coupling with Flux module is used as the input of the Recurdynplant block module, and the spring reaction force data output by the Recurdyn plant block module is processed by the operation module and the logic module and the excitation voltage of the coil drive circuit is used as the input of the Coupling with Flux module.

[0102] In step S15 of the present invention, the contactor model is tested using simulation parameters to verify the contactor, including:

[0103] By modifying the numerical values ​​of simulation parameters and combining the interfaces in electromagnetic field finite element analysis software and dynamic simulation software, the contactor model is tested to achieve contactor verification.

[0104] It should be noted that the contactor coil equivalent model is updated in real time based on the magnetic circuit inductance calculated by the electromagnetic field finite element model.

[0105] The schematic diagram of the verification process of the present invention can be referred to Figure 4 As shown, after the contactor model is transmitted by the 3D modeling software, it is analyzed by the multi-body dynamics analysis software to obtain the spring reaction force; after the electromagnetic mechanism model is modeled by the 3D modeling software, the electromagnetic mechanism model is transmitted to the electromagnetic field finite element analysis software, and the electromagnetic field finite element analysis software is used to perform electromagnetic calculations on the electromagnetic mechanism model, and the verification process of the contactor is realized in the circuit simulation and interface software.

[0106] In a further embodiment, it may also include: determining whether the verification result meets expectations, if not, modifying the coil parameters, and continuing the verification process until the verification result meets expectations, the expectation being that the collision bounce of the core and the contact is in a threshold interval, the threshold interval being the interval where the collision bounce of the core and the contact is minimized, and minimizing this interval can effectively ensure the electrical life and mechanical life of the contactor.

[0107] When the verification results meet expectations, the coil skeleton can be printed out based on 3D printing technology, the coil can be wound, assembled into a contactor, and a power-on experiment can be carried out to further verify the accuracy and rationality of the coil design.

[0108] That is to say, after determining whether the verification result meets expectations, the following steps are also included:

[0109] Based on the coil parameters, modeling is performed in a three-dimensional modeling software to obtain a coil skeleton model;

[0110] Print the coil skeleton using 3D printing technology;

[0111] Assembling to obtain a contactor;

[0112] The contactor is powered on and tested to verify the contactor.

[0113] In the embodiment of the present invention, the printed skeleton is used to wind the coil, and the wound coil is installed in a contactor to perform a power-on experiment, which can further verify the accuracy and rationality of the coil design.

[0114] As an optional implementation of the content disclosed in the embodiment of the present invention, the embodiment of the present invention provides a contactor verification device for executing a contactor verification method, such as Figure 5 As shown, Figure 5 A schematic diagram of the structure of a verification device for a contactor provided in one embodiment of the present invention, the verification device for the contactor comprises:

[0115] A coil parameter determination module 51, used to determine the coil parameters of the electromagnetic mechanism in the initial contactor;

[0116] A window size calculation module 52, for determining the coil window size of the coil based on coil parameters in combination with coil wire parameters, wherein the coil wire parameters are parameters of the wire in the coil;

[0117] A coil skeleton generation module 53 is used to generate a coil skeleton model in a three-dimensional modeling software based on the structure of the initial contactor and the coil window size;

[0118] A contactor generation module 54 is used to generate a corresponding contactor model based on the coil skeleton model, wherein the contactor model at least includes an electromagnetic mechanism model and a contact system model;

[0119] The testing module 55 is used to test the contactor model using simulation parameters to verify the contactor.

[0120] In the contactor verification device provided in the embodiment of the present invention, the contactor at least includes an electromagnetic mechanism, a coil frame and a contact system, the electromagnetic mechanism at least includes an excitation coil, a moving iron core, a stationary iron core and a reaction spring, the contact system at least includes a contact spring, a moving contact and a stationary contact, and the coil parameter determination module 51 is used to determine the coil parameters of the electromagnetic mechanism in the contactor, including:

[0121] The spring reaction force of the contactor is calculated based on the moving iron core and the stationary iron core, the contact opening distance, the stiffness coefficient of the reaction spring and the contact spring, and the initial compression of the contact spring. The contact opening distance is the maximum distance between the moving and stationary contacts.

[0122] According to the iron core structure of the contactor, the electromagnetic attraction under the condition of constant magnetic potential is calculated, wherein the iron core structure includes the moving iron core and the stationary iron core of the contactor;

[0123] Calculate the excitation ampere-turns of the contactor according to the spring reaction force and the electromagnetic attraction of the contactor, wherein the excitation ampere-turns include a first excitation ampere-turn and a second excitation ampere-turn, wherein the first excitation ampere-turn is the excitation ampere-turn when the contactor is in a starting state, and the second excitation ampere-turn is the excitation ampere-turn when the contactor is in a holding state;

[0124] determining a reference current in a holding state based on the second excitation ampere-turn;

[0125] The corresponding number of coil turns is determined based on the reference current in the holding state.

[0126] In the contactor verification device provided by the embodiment of the present invention, the window size calculation module 52 is used to determine the coil window size of the coil based on the coil parameters and the coil wire parameters, including:

[0127] Based on the number of coil turns, calculate the coil current density of the contactor in the starting state;

[0128] Screening wire gauge based on coil current density;

[0129] The corresponding coil window size is determined based on the wire specification of the wire, the filling factor of the wire and the coil skeleton thickness.

[0130] In the contactor verification device provided by the embodiment of the present invention, the process of forming the electromagnetic mechanism model includes:

[0131] determining an initial model of the electromagnetic mechanism based on the parameters;

[0132] The initial model of the electromagnetic mechanism is imported into the electromagnetic field finite element analysis software, and the material properties of the excitation coil, moving iron core, static iron core and reaction spring in the electromagnetic mechanism are added and the mechanical properties are set to form the electromagnetic mechanism model.

[0133] In the contactor verification device provided in the embodiment of the present invention, the contactor model is formed by splicing an electromagnetic mechanism model, a contact system model and a coil skeleton model;

[0134] The contactor model also includes a motion bracket model, and the contactor model is formed by splicing the motion bracket model, the electromagnetic mechanism model, the contact system model and the coil skeleton model.

[0135] In the contactor verification device provided in the embodiment of the present invention, the test module 55 tests the contactor model using simulation parameters to implement the verification of the contactor, including:

[0136] By modifying the numerical values ​​of simulation parameters and combining the interfaces in electromagnetic field finite element analysis software and dynamic simulation software, the contactor model is tested to achieve contactor verification.

[0137] The contactor verification device provided in the embodiment of the present invention further includes:

[0138] The judgment module 56 judges whether the verification result meets expectations. If not, the coil parameters are modified and the verification process is continued until the verification result meets expectations, where the expectation is that the collision and bounce of the core and the contact are within a threshold range.

[0139] In the contactor verification device provided by the embodiment of the present invention, after determining whether the verification result meets expectations, the method further includes:

[0140] Based on the coil parameters, modeling is performed in a three-dimensional modeling software to obtain a coil skeleton model;

[0141] Print the coil skeleton using 3D printing technology;

[0142] Assembling to obtain a contactor;

[0143] The contactor is powered on and tested to verify the contactor.

[0144] In the embodiment of the present invention, the electromagnetic field-mechanical force field joint simulation technology and 3D printing rapid prototyping technology are introduced into the design of the electromagnetic mechanism of a small contactor, and a joint simulation model that takes into account the collision and bouncing behavior of moving parts and the change of magnetic circuit inductance is established. By adding contact system simulation, while effectively shortening the R&D time and reducing the verification cost, it can better reflect the actual operating status of the contactor, and uses 3D printing rapid prototyping technology to conduct physical verification of the design scheme, providing a new R&D design idea for electromagnetic mechanism design developers.

[0145] The above verification device in the embodiment of the present invention can simulate the collision bounce of the electromagnetic mechanism during the collision process to the greatest extent, simplify the verification process of the collision bounce, and save the research and development cost of the electromagnetic mechanism.

[0146] The above describes multiple implementation schemes provided by the embodiments of the present invention. The various optional methods introduced in the implementation schemes can be combined and cross-referenced with each other without conflict, thereby extending a variety of possible implementation schemes, which can all be considered as implementation schemes disclosed and open in the embodiments of the present invention.

[0147] Although the embodiments of the present invention are disclosed above, the present application is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims.

Claims

1. A contactor verification method, characterized in that: include: Determine coil parameters of the electromagnetic mechanism in the initial contactor; Determining a coil window size of the coil based on coil parameters in combination with coil wire parameters, wherein the coil wire parameters are parameters of the wire in the coil; Based on the initial contactor structure and coil window size, a coil skeleton model is generated in a 3D modeling software; Based on the coil skeleton model, a corresponding contactor model is generated, wherein the contactor model at least includes an electromagnetic mechanism model and a contact system model; Use simulation parameters to test the contactor model and verify the contactor; The contactor at least includes an electromagnetic mechanism, a coil frame and a contact system, the electromagnetic mechanism at least includes an excitation coil, a moving iron core, a static iron core and a reaction spring, the contact system at least includes a contact spring, a moving contact and a static contact, and the coil parameters of the electromagnetic mechanism in the initial contactor are determined, including: The spring reaction force of the contactor is calculated based on the moving iron core and the stationary iron core, the contact opening distance, the stiffness coefficient of the reaction spring and the contact spring, and the initial compression of the contact spring. The contact opening distance is the maximum distance between the moving and stationary contacts. According to the iron core structure of the contactor, the electromagnetic attraction under the condition of constant magnetic potential is calculated, wherein the iron core structure includes the moving iron core and the stationary iron core of the contactor; Calculate the excitation ampere-turns of the contactor according to the spring reaction force and the electromagnetic attraction of the contactor, wherein the excitation ampere-turns include a first excitation ampere-turn and a second excitation ampere-turn, wherein the first excitation ampere-turn is the excitation ampere-turn when the contactor is in a starting state, and the second excitation ampere-turn is the excitation ampere-turn when the contactor is in a holding state; determining a reference current in a holding state based on the second excitation ampere-turn; The corresponding number of coil turns is determined based on the reference current in the holding state.

2. The contactor verification method according to claim 1, characterized in that: The step of determining the coil window size of the coil based on the coil parameters and in combination with the coil wire parameters includes: Based on the number of coil turns, calculate the coil current density of the contactor in the starting state; Screening wire gauge based on coil current density; The corresponding coil window size is determined based on the wire specification of the wire, the filling factor of the wire and the coil skeleton thickness.

3. The contactor verification method according to claim 1, characterized in that: The forming process of the electromagnetic mechanism model includes: determining an initial model of the electromagnetic mechanism based on the parameters; The initial model of the electromagnetic mechanism is imported into the electromagnetic field finite element analysis software, and the material properties of the excitation coil, moving iron core, static iron core and reaction spring in the electromagnetic mechanism are added and the mechanical properties are set to form the electromagnetic mechanism model.

4. The contactor verification method according to claim 1, characterized in that: The contactor model is formed by splicing an electromagnetic mechanism model, a contact system model and a coil skeleton model; The contactor model also includes a motion bracket model, and the contactor model is formed by splicing the motion bracket model, the electromagnetic mechanism model, the contact system model and the coil skeleton model.

5. The contactor verification method according to claim 1, characterized in that: The contactor model is tested by using simulation parameters to verify the contactor, including: By modifying the numerical values ​​of simulation parameters and combining the interfaces in electromagnetic field finite element analysis software and dynamic simulation software, the contactor model is tested to achieve contactor verification.

6. The contactor verification method according to claim 1, characterized in that: Also includes: It is determined whether the verification result meets expectations. If not, the coil parameters are modified and the verification process is continued until the verification result meets expectations, where the expectation is that the collision and bounce of the core and the contact are within a threshold range.

7. The contactor verification method according to claim 6, characterized in that: After determining whether the verification result meets expectations, the following steps are further included: Based on the coil parameters, modeling is performed in a three-dimensional modeling software to obtain a coil skeleton model; Print the coil skeleton using 3D printing technology; Assembling to obtain a contactor; The contactor is powered on and tested to verify the contactor.

8. A contactor verification device, characterized in that: include: A coil parameter determination module, used to determine the coil parameters of the electromagnetic mechanism in the initial contactor; A window size calculation module, for determining a coil window size of the coil based on coil parameters in combination with coil wire parameters, wherein the coil wire parameters are parameters of the wire in the coil; A coil skeleton generation module is used to generate a coil skeleton model in a 3D modeling software based on the structure of the initial contactor and the coil window size; A contactor generation module is used to generate a corresponding contactor model based on the coil skeleton model, wherein the contactor model at least includes an electromagnetic mechanism model and a contact system model; A test module is used to test the contactor model using simulation parameters to verify the contactor; The contactor at least includes an electromagnetic mechanism, a coil frame and a contact system, the electromagnetic mechanism at least includes an excitation coil, a moving iron core, a static iron core and a reaction spring, the contact system at least includes a contact spring, a moving contact and a static contact, and the coil parameter determination module is used to determine the coil parameters of the electromagnetic mechanism in the initial contactor, including: The spring reaction force of the contactor is calculated based on the moving iron core and the stationary iron core, the contact opening distance, the stiffness coefficient of the reaction spring and the contact spring, and the initial compression of the contact spring. The contact opening distance is the maximum distance between the moving and stationary contacts. According to the iron core structure of the contactor, the electromagnetic attraction under the condition of constant magnetic potential is calculated, wherein the iron core structure includes the moving iron core and the stationary iron core of the contactor; Calculate the excitation ampere-turns of the contactor according to the spring reaction force and the electromagnetic attraction of the contactor, wherein the excitation ampere-turns include a first excitation ampere-turn and a second excitation ampere-turn, wherein the first excitation ampere-turn is the excitation ampere-turn when the contactor is in a starting state, and the second excitation ampere-turn is the excitation ampere-turn when the contactor is in a holding state; determining a reference current in a holding state based on the second excitation ampere-turn; The corresponding number of coil turns is determined based on the reference current in the holding state.

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