Lenze 8400 - Page 170

5 Motor control (MCTRL)
5.4 V/f characteristic control (VFCplus)
170
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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V/f characteristic control (VFC)
The accuracy of the torque limitation is limited because the actual torque (C00056/2
) is only
calculated from the slip speed measured indirectly via the motor current.
V/f control (VFC + encoder)
The slip speed of the motor is available at the slip controller output. This leads to a high accuracy for
the actual torque (C00056/2
) and the torque limitation.
[5-6] Extract from the signal flow of the V/f control (VFC + encoder)
Parameters Info Parameters Info
1 C00056/2 Actual torque value 9 C00830/22 MCTRL: nSpeedSetValue_a
2 C00830/29 Limitation of torque in motor mode 10 C00909/1 Max. pos. speed
3 C00830/28 Limitation of torque in generator mode 11 C00909/2 Max. neg. speed
4 C00054 Motor current 12 C00105 Decel. time - quick stop
5 C00022 Imax in motor mode 13 C00050 Speed setpoint
6 C00023 Imax in generator mode
7 C00074 Ti Imax controller
8 C00073 Vp Imax controller