Motor torque characteristic

The torque constant kt [Nm/A] describes the linear relationship between the torque/force forming current Iq and the torque or force. On closer examination, the torque characteristic flattens due to saturation effects. The current controller of the AX8000 takes this non-linearity for Beckhoff motors of the AM8000/AL8000 series into account via the "Torque characteristic" [1]. This data is contained in the electronic identification plate or the motor data file (.xeds). The read-back or setting of the torque is therefore also possible with high currents.

The curve for third-party motors is parameterized on the "Basic settings" tab [3] when the external motor is created.