FIELD: electricity.
SUBSTANCE: invention can be used to control a propulsion system including: an energy converter (13), a smoothing capacitor (12), a three-phase AC motor (14) and a current sensor (14v, 14w). The engine controller is provided with an electronic control unit (15). The electronic control unit determines the target phase (156) which is a phase of a second command signal phase voltage having the greatest difference from the first command signal phase voltage having a signal level which is neither the maximum nor the minimum signal level on the basis of the command signal phase voltage (Vu, Vv, Vw), generated from the value (Iv*, Iw*) of the current detection sensor, and corrects the value (157v, 157w, 158v, 158w) of the current detecting sensor which detects a phase current target phase to voltage ix at the terminals (VH) of the smoothing capacitor voltage corresponds to the desired value.
EFFECT: smooth change of performance.
15 cl, 20 dwg
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