Unit comprising an electric power source including at least two elements of different technologies and an inverter for controlling an alternating-current electric motor

An installation comprising:

• an electrical energy source that includes at least two elements of different technologies;
• and
• an inverter for controlling an AC electric motor that includes a stator having at least two phases and a rotor, wherein the inverter includes:
• two attachment terminals that attach to a DC bus associated with a DC electric voltage and the electrical energy source,
• an AC current generator that delivers a current to a terminal strip, the terminal strip being connectable to the at least two phases of the AC electric motor,
• a supply line positioned between the attachment terminals and the AC current generator,
• a supply current measurement line on which flows a measurement of a supply current on the supply line,
• at least one motor current measurement line, on each of which flows a measurement of an AC current on a respective one of the at least two phases of the AC electric motor, to enable the AC currents flowing in the at least two phases to be ascertained,
• an input that receives information including at least values of limit currents of the electrical energy source for the supply current flowing on the supply line, the limit currents of the electrical energy source taking into consideration the at least two elements of different technologies, and including a requested-torque setpoint, and
• a controller that receives the measurement of the supply current on the supply line, the measurements of the AC currents of the at least two phases of the AC electric motor, the limit currents of the electrical energy source, and the requested-torque setpoint,
• wherein the controller controls phase currents of the AC electric motor as a function of the requested-torque setpoint while maintaining a current passing through the supply line at a value compatible with the values of the limit currents of the electrical energy source.