The invention relates to a method for operating a drive train (1) of a work machine, with a drive (8) of the drive train (1) being driven by an electric drive motor (2) via a drive gear (4) and with a gear change of the drive gear (8 ) the speed of the drive motor (2) is synchronized with the gear to be engaged The method according to the invention is characterized in that a computational model of the traction motor (2) is used for the speed synchronization, which describes a torque to be applied for speed synchronization taking into account an inertial moment of the traction motor (2). The invention also relates to a corresponding drive train (1) and a work machine.
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