A drive circuit is disclosed that is operable to receive power from a DC power source and apply AC drive power to a motor at a working current and voltage. The drive circuit includes at least one power inverter and a controller for the power inverter. The power inverter has: number p ( p ¥ 1) of phase outputs (40 A , 40 B , 40 C ), driven by a number n ( n ¥ 2) of switching legs (70). Each of these switching legs includes two series-connected half-legs, the phase output being connected between the half-legs (68). Each half-leg includes a number s ( s > 1) of series-connected switching stages (48), each of which is capable of operating at the working voltage divided by ( s - 1); and not more than n - 1 legs are capable of delivering the working current of a phase. The controller has a plurality of independent drivers (80), each switch within a phase being controlled by a different one of the plurality of drivers (80). A particular application of the drive circuit is to supply power to an electrical backup drive in an aircraft.


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    Titel :

    Electrical drive system


    Erscheinungsdatum :

    2015-12-23


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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