Abstract: We are interested in modelling of electromechanical conversion chains. Such chain is made up of an electric source of energy, an electric converter followed by an electric machine, a mechanical converter and finally of a mechanical source which comes to charge the system. The order of such chains is an ambitious challenge for it must answer the management of the energy transformation which takes place with through the various elements of the chain. Two tools of modelling and representation of such chains are presented, the first is the Causal Informational Graph (GIC) which makes it possible to highlight the various relations of causes for effect and the second the Energetic Macroscopic Representation (EMR) which insists on the principle of action and reaction between the various elements of the system. These tools have a double interest, to initially allow the development of the model for the system then to structure the drive. This work is devoted to the determination of an algorithm of control of an electromechanical conversion chain with induction machine.