Materials
Introduction
The materials used to define the physical properties of different regions in a Flux problem can be stored in a materials database.
Structure (definition)
In a materials database a material is defined by:
- General data on the material
- One or more physical properties (electrical, magnetic or thermal), themselves characterized by models represented by curves
General data
The general data for the materials are presented in the table below:
| Data | Contents / Remarks |
|---|---|
| Name | |
| Comments | Limited number of characters |
| Family | It allows to sort materials in the tree by family |
| Chemical composition | |
| Manufacturer | It allows to sort materials in the tree by manufacturer |
| Reference | |
| Mass density (Kg/m3) | |
| Price ($/Kg) | |
| Author | |
| Lamination data | In the case of soft magnetic materials, it is possible to specify if it is in the form of laminations or a solid body |
| In the case of laminations, the following characteristics can be entered: thickness, specific losses at 1T and 1.5T for a given frequency, fill factor | |
| Description | Text field without limitation of characters |
Physical properties
The physical properties that permit the characterization of the materials are listed in the table below:
| Physical properties | Law of behaviour |
|---|---|
| Magnetic | B(H) law |
| Electric | J(E) law |
| Dielectric | D(E) law |
| Thermal conductivity | K(T) law |
| Heat capacity | ρCp(T) law |
A material can have an array of properties, independent of the physical application in which it will be used.
The « dependences » between the physical properties and the physical applications are presented in the chapter Materials: software aspects.
Models
A detailed content on each model exists in the chapter Materials: principles and in the page Iron losses: à posteriori Bertotti model for iron losses models.
The presented models in Flux and in the materials manager are compatible.