Control apparatus and method for at least one electrical rotating machine using compound current

In control apparatus and method for at least one electrical rotating machine, two rotors are disposed in the electrical rotating machine on the same axis of rotation and being driven independently of each other by means of a generated compound current and are associated with at least one stator and a position of at least one of the rotors is controlled in such a manner that a maximum value of the compound current is reduced as low as possible.