Theory for Power and Energy Computations > Pure Bond Graph Libraries
Transformer TF Power Calculation
Ideal TF transformers do not include any power or energy variables since they are ideal so they only convert the effort/flow by definition.
In some cases, some transformers TF are non-ideal so that they include other phenomena like friction or stiffness inside. In such cases, you will get some R, C, I elements for the power and energy computations.
Note
It is actually normal not to see any power, energy, activity groups of variables appearing in TF ideal transformer submodels, even when the power or energy computations are activated. It is not a limitation but a real consistency with the Bond-Graph theory to be maintained.
Source: https://docs.sw.siemens.com/en-US/doc/254352342/PL20250521841123434.amesim_collection.Power_Energy_Analysis/Transformer_TF_Power_Calculation · retrieved 2026-07-17