Systems and sub-systems
Definition of a system
The system is the assembly of the device descriptions in the software. It is the described device in the finite elements (FE) domain, the possible electrical supply circuits or charge circuits and the possible mechanical devices of motor, generator or brake type.
Definition of a sub-system
A system consists of one or more sub-systems (see figure below).
It is possible to distinguish among the following:
- the internal sub-system, consisting of all the regions described within the finite elements domain, the non meshed coils included
- the external sub-systems, such as the external electrical circuits or the external mechanical devices.
The system always consists of at least one sub-system, the internal sub-system.
The exchanges
In a general manner, there can be exchanges of energy:
- among the sub-systems:
- among the internal sub-system and the external sub-systems
- among the external sub-systems*
- between a sub-system and the exterior
- between the internal sub-system and the exterior
- between an external sub-system and the exterior
Examples
Examples of systems (devices) with their external sub-systems are given in the table below.
| Induction heating device | |
|---|---|
| 1 electric sub-system |
 |
| Transformer | |
|---|---|
| 2 electric sub-systems |
|
| Motor | |
|---|---|
|
1 electric sub-system 1 mechanical sub-system |
|
| Generator | |
|
1 electric sub-system 1 mechanical sub-system |
|