The light blue or dark blue dotted lines contrary to the solid light blue or dark blue lines are valid for operation in conjunction with drive amplifiers which have no capabilities in making the field weakening area work (like older firmware versions with IndraDive) or where the parameters are set in a way that field weakening is not activated.
The difference between the first diagram is operated at at a non-controlled power supply unit like XVE or XCS at mains voltage 3x AC 400 V whereas the second diagram shows the behavior at controlled power supply unit like XVR where the mains voltage doesn´t matter.
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