Figure 88: Model deactivation depending on the motor type
6.2.16.1.5 Model replacement (“low speed ctrl” ds41 (Bit 8…9) = (A)ViCL)
The following structure figure describes the asynchronous machine. With the syn-
chronous machine, the slip calculation and the flux controller are omitted.
The actual value (NAct) is set with a transition function (=> description ds48 model
ctrl min. acc/dec [s
2
]) to the setpoint (NRef).
A torque jump on the shaft is to be expected during activation/deactivation of
model operation.
The PI component of the speed controller is stopped when the model is switched
off until the actual value has reached the setpoint and the state constant run (in 10
ms grid) is detected. Then the PI component is set to ZERO.
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