The power is represented by the BOND
The direction of positive power is noted by the half-arrow at the end of the bond
The signal is represented as information bonds: no power
Detector of effort such as pressure, voltage, temperature
Detector of flow such as current, hydraulic flow
Bond graph model of DC Motor
Is the representation (by a bond) of power flows as products of efforts and flows with elements acting between. These variables and junction structures to put the system together.
Bond graphs are labeled and directed graphs, in which the vertices represent submodels and the edges represent an ideal energy connection between power ports.
The vertices are idealized descriptions of physical phenomena: they are concepts, denoting the relevant aspects of the dynamic behavior of the system.
The edges are called bonds. They denote point-to-point connections between submodel ports.
The bond transports a power as product of two generic energy variables
Which generic variables are used ?