System and control method for an excited electric motor permanently with at least one phase.

Control system for an electric motor (26) permanently excited with at least one phase (20, 22, 24), comprising for each phase of the motor (26) an arrangement of semi-bridge (14, 16, 18), an intermediate circuit (28) connecting each array of semi-bridge (14, 16, 18) with a source of supply voltage (32) of the engine, a control arrangement (34) for each arrangement of semi-bridge (14 , 16, 18), wherein in correspondence with the command applied or may be applied to the phase (20, 22, 24) of the electric motor (26) associated with this arrangement (14, 16, 18), a voltage or respectively a potential of predetermined polarity, a detector arrangement (46) operating state for detecting at least one operating state of the system (10) or / and the electric motor (26), the arrangement (34) being, configured to generate, if by the detector arrangement (46) operating state the existence of at least one detected this do of funcionamientopredeterminado in the control system (10) or / and the electric motor (26), a command to generate a short circuit between all connections (20, 22, 24) of the motor (26).