Injection moulding machine with electric switching units and method for synchronising the currents of electric switching units

Injection moulding machine, comprising:

• at least one electrical machine;
• multiple electrically parallel-connected switching units, which are designed to drive the electrical machine, wherein each switching unit having at least one electrical output and at least one electrical switch associated with the output, which can be switched according to a switching pattern, wherein corresponding outputs of the switching units are electrically connected in parallel to a common output, which is connected to the electrical machine;
• at least one primary open-loop and/or closed-loop control, which is designed to actuate the switching units with control signals, in order to operate the electrical machine;
• a measuring device for measuring output currents at the outputs of the switching units;
• and
• at least one correction controller, which is designed to adjust a corresponding control signal in the event of a deviation between a measured output current at an output and a target value for an output current, such that switching times, which are predetermined by the switching pattern, of at least one switch, which is associated with the relevant output, are shifted forwards or backwards in time and thereby the deviation between the target value and the output current is reduced, wherein the at least one correction controller is adjusted to synchronize switching times of switches, which are associated with corresponding outputs, such that these switch simultaneously, wherein,
• corresponding outputs of the switching units are connected to the respective common outputs via connecting lines, wherein, in order to smooth the output currents, each connecting line is guided through a smoothing inductance element in opposite directions at least once together with the connecting line of another corresponding output.