CN114861504A - A kind of induction heating magnetic circuit design method and device - Google Patents

Abstract

The invention discloses a method and device for designing an induction heating magnetic circuit. The method comprises: confirming the design index of a target heating object for an induction heating coil; establishing an induction heating model according to the design index; setting the induction heating model 3D calculation is performed according to the induction heating model, and a 3D design cloud map is obtained. By adopting the embodiment of the present invention, a 3D design cloud diagram of the induction heater is obtained, and an induction heating coil conforming to the target heating object can be accurately designed by using the cloud diagram, and the requirements for efficiency, accuracy and versatility of the design of the induction heating coil can be met.

Description

A kind of induction heating magnetic circuit design method and device

technical field

The invention relates to the field of induction heating design, in particular to a method and device for designing an induction heating magnetic circuit.

Background technique

For induction heating equipment, the induction heating coil is the core component of its heating part, and its performance directly determines the performance of the induction heater. Nowadays, one of the most important research directions in the field of induction heater research is the study of the magnetic circuit design of induction heaters. However, the current magnetic circuit design method for induction heaters is not mature enough, and there are many bottlenecks in the magnetic circuit design process of induction heaters.

In the process of induction heating, the size between the object to be heated and the induction heater affects the quality of the heating process, and the magnetic line density of the alternating magnetic field generated by the induction heater affects the heating effect. improve. When the magnetic field strength at the position of the alternating magnetic field generated by the induction coil of the workpiece to be processed is low, the heating efficiency is poor, the energy loss is large, and the induction heater is close to the no-load state, causing the induction heater to shut down. The position where the workpiece is heated is at the position with the highest magnetic field strength.

However, at present, the induction coils in most induction heaters are designed by formula calculation according to the size of the heated object, which obviously cannot meet the heating requirements of the heated workpieces with special shapes and special parts, and is not universal. Because the traditional design method calculates the resonant frequency by calculating the penetration depth of induction heating, the method of calculating the size of the induction coil and the number of turns according to the size of the workpiece is not accurate, and it is only suitable for the same batch of workpieces. The efficiency of the induction coil may decrease. When the shape of the workpiece to be processed is precise and the structure is complex, it is difficult for the traditional design method to obtain accurate analysis and design results.

SUMMARY OF THE INVENTION

The invention provides an induction heating magnetic circuit design method and device, establishes an induction heating model, performs finite element 3D design and analysis, and obtains an induction coil design model.

In order to solve the above-mentioned technical problems, a first aspect implemented by the present application provides a method for designing an induction heating magnetic circuit, the method comprising:

Determine the execution index of the heating process of the target object;

Determine the three-dimensional size of the induction heating workpiece;

According to the design index, design an induction heating model;

Set the appearance size and structure parameters of the induction heater, the working electrical parameters of induction heating, and the material properties;

3D calculation is performed according to the induction heating model, and a 3D design cloud diagram of the induction heater is obtained.

In a possible implementation manner of the first aspect, before the 3D calculation is performed according to the induction heating 3D model to obtain the 3D design cloud map, the method further includes:

The induction heating model was imported into COMSOL Multiphysics for size optimization design.

In a possible implementation manner of the first aspect, the performing 3D calculation according to the induction heating 3D model specifically includes:

According to the induction heating model, combined with simulation software, finite element 3D transient field analysis and design are carried out.

In a possible implementation manner of the first aspect, the external dimension and structural parameters include the number of turns, wire diameter, coil diameter and coil spacing of the induction heating coil;

The working electrical parameters of the induction heating include the working power of the induction heating power supply, the working current, and the working frequency;

The material properties include the induction heating coil material, the electrical conductivity and magnetic permeability of the heated workpiece material, the Curie point of the heated workpiece, and the operating frequency range of the ferrite for magnetic circuit guidance design.

A second aspect of the embodiments of the present application provides an induction heating magnetic circuit design device, including:

The index confirmation module is used to determine the design index of the heated object to the induction heater;

a model establishment module for establishing an induction heating model according to the design index;

A parameter setting module, used for setting the appearance size and structure parameters of the induction heater, the working electrical parameters of induction heating, and the material properties;

The 3D calculation module is used for performing 3D calculation according to the induction heating model to obtain a 3D design cloud map.

Compared with the prior art, an induction heating design method and device provided by the embodiment of the present invention firstly constructs an induction heating model, sets parameters for the induction heating model in layers, and combines the simulation software for the obtained induction heating model. Carry out size optimization, magnetic circuit guidance optimization and 3D calculation, and finally get a complete 3D design cloud map. Using the cloud map, the heating index that meets the special heating target can be accurately designed to meet the requirements of the heating position and heating depth of the heated workpiece.

Description of drawings

1 is a schematic flowchart of a method for designing an induction heating magnetic circuit according to an embodiment of the present invention;

2 is an application schematic diagram of an induction heating magnetic circuit design method provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of an induction heating 3D design cloud diagram according to an embodiment of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings in the examples of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIG. 1, an embodiment of the present invention provides a method for designing an induction heating magnetic circuit, which includes:

S1. Determine the design index of the heated object to the induction heating magnetic circuit.

S2. Establish an induction heating model according to the design index.

S3. Set the appearance size and structure parameters of the induction heater, the working electrical parameters of induction heating, and the material properties.

S4. 3D calculation is performed according to the induction heating model to obtain a 3D design cloud map of the induction heater.

At present, the core components of an induction heater include an induction heating power supply and an induction heating coil;

Among them, the design of the induction heating power supply has become mature, the key technology is relatively stable, the current controller is highly integrated, and the output power control and frequency control are relatively easy.

Compared with the design of the induction heating power supply part, the design of the induction heating coil needs to involve the properties of the heated workpiece, including its size, conductivity, Curie temperature and other factors. The traditional formula has poor calculation accuracy and low applicability.

Through finite element analysis, the simulation of the induction heating process is an excellent choice for the current induction heating magnetic circuit design.

Exemplarily, the external dimension and structure parameters include the number of turns, wire diameter, coil diameter and coil spacing of the induction heating coil;

The working electrical parameters of the induction heating include the working power of the induction heating power supply, the working current, and the working frequency;

The material properties include the induction heating coil material, the electrical conductivity and magnetic permeability of the heated workpiece material, the Curie point of the heated workpiece, and the operating frequency range of the ferrite for magnetic circuit guidance design.

Exemplarily, before the 3D calculation is performed according to the induction heating 3D model to obtain the 3D design cloud map, the method further includes:

The induction heating model was imported into COMSOL Multiphysics for size optimization design.

Exemplarily, the performing 3D calculation according to the induction heating model specifically includes:

According to the induction heating model, combined with simulation software, finite element 3D transient field design is carried out.

3D calculation is an electromagnetic thermal calculation of finite element 3D transient field design. After the calculation is completed, a 3D calculation cloud map will be obtained, which includes the size and structure parameters of the induction heating coil and the field temperature parameters. Referring to Fig. 3, under the hierarchical display of the cloud image, the relevant technical personnel can clearly and intuitively obtain all the parameters of the induction heater design, so as to effectively design the magnetic circuit of the induction heating coil.

Compared with the prior art, an induction heating magnetic circuit design method provided by the embodiment of the present invention firstly constructs an induction heating model, sets parameters of the induction heating model in layers, and combines the simulation software for the obtained induction heating model. Perform size optimization and 3D calculations, and finally get a complete 3D design cloud map. Using the cloud map, the induction heating coil that meets the heating index of the target heating object can be accurately designed, and the requirements of accuracy, efficiency and versatility can be met.

A second aspect of the embodiments of the present application provides an induction heating magnetic circuit design device, including an index confirmation module, a model establishment module, a parameter setting module, and a 3D calculation module.

The index confirmation module is used to determine the design index of the heated object to the induction heater;

a model establishment module for establishing an induction heating model according to the design index;

a model establishment module for establishing an induction heating model according to the design index;

The 3D calculation module is used for performing 3D calculation according to the induction heating model to obtain a 3D design cloud map.

Those skilled in the art can clearly understand that, for the sake of clarity, convenience, and brevity of the description, the specific working process of the device described above will not be repeated here.

Compared with the prior art, an induction heating magnetic circuit design method and device provided by the embodiment of the present invention firstly constructs an induction heating model, sets parameters for the induction heating model in layers, and combines the simulation software for the obtained induction heating model. The heating model is subjected to size optimization and 3D calculation, and finally a complete 3D design cloud map is obtained. Using the cloud map, the induction heating coil that meets the heating index of the target heating object can be accurately designed, and the requirements of accuracy, efficiency and versatility can be met.

The above is the preferred implementation method of the present invention, and does not limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly used in other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (5)

1. A method and a device for designing an induction heating magnetic circuit are characterized by comprising the following steps:

confirming the design index of the target heating object to the induction heating coil;

establishing an induction heating model according to the design index;

setting the structural parameters of the appearance dimension, the electrical parameters of the induction heating work and the material properties of the induction heater;

and 3D calculation is carried out according to the induction heating model to obtain a 3D design cloud picture of the induction heater.

2. The method of claim 1, wherein before the 3D calculation according to the induction heating model to obtain the 3D design cloud, the method further comprises:

and (3) introducing the induction heating model into COMSOL Multiphysics for size optimization design.

3. The method for designing an induction heating magnetic circuit according to claim 1, wherein the performing 3D calculation based on the induction heating model specifically includes:

and designing a finite element 3D transient field by combining simulation software according to the induction heating model.

4. The design method of the induction heating magnetic circuit of claim 1, wherein the design method comprises a step of forming a magnetic circuit. The appearance size structural parameters comprise the number of turns of the induction heating coil, the wire diameter, the coil diameter and the coil interval;

the induction heating working electrical parameters comprise induction heating power supply working power, working current and working frequency;

the material properties include the induction heating coil material, the electrical conductivity and magnetic permeability of the heated workpiece material, and the curie point of the heated workpiece, the operating frequency range of the ferrite for magnetic circuit guidance design.

5. An induction heating magnetic circuit designing apparatus, comprising:

the index confirming module is used for confirming the design index of the heated object to the induction heater;

the model establishing module is used for establishing an induction heating model according to the design index;

the parameter setting module is used for setting the structural parameters of the appearance size, the electrical parameters of the induction heating work and the material properties of the induction heater;

and the 3D calculation module is used for performing 3D calculation according to the induction heating model to obtain a 3D design cloud picture.

Images