DSQC609 3HAC14178-1 PBSE5117 is based on a library of physical components connected to a line represented using physical connections. A system is then built by connecting the physical components. The software must solve the connection problem internally using several numerical methods. For example, if there are two inductors connected in series, only one state variable is calculated because both currents are equal. This kind of software is very beneficial for system design and analysis.

The DSQC609 3HAC14178-1 PBSE5117 system simulation programme is based on a functional library. The system is described by uniting several basic functions using lines representing common variables. Several components are described through an overall function. For example, two inductors in series are described through a single transfer function with a single time constant. This type of software provides a large number of analysis and automation tools and is therefore widely used in control design.

DSQC609 3HAC14178-1 PBSE5117 system and organising the control functions that must be designed requires a combination of both graphical environments. However, they are based on completely different ideas and therefore it is difficult to unify the simulation. Not only that, but they may cause some errors when operated by users without experimental experience. A joint installation of the well-known MATLAB/Simulink simulation environment (system simulation programme including powerful libraries and toolboxes for automatic control) and the new PLECS (circuit simulation programme including power electronics libraries) was tested.