Optimising The Control Mode - Lenze 8400 StateLine C Reference Manual

8400 StateLine C | Reference manual
Motor control (MCTRL)
Sensorless vector control (SLVC)
5.7.4

Optimising the control mode

5.7.4.1 Optimising the starting performance after a controller enable
After the controller has been enabled, the starting action of the motor is delayed due to the
magnetisation of the motor. Under consideration of the motor rotor time constant
(C00083), the time delay is calculated as follows:
Magnetisation = 1.5 * motor rotor time constant
If this delay cannot be tolerated for specific applications, the motor must always be
operated in an energised condition. For this, select one of the following options:
Procedure without setting a controller inhibit
1. Deactivate the auto DCB function with
2. Do not activate the controller inhibit. Instead, stop the drive by selecting a setpoint of
0 or by activating the quick stop function.
Procedure with setting a controller inhibit due to application requirements
1. Deactivate the auto DCB function with
2. Enter a greater value for the motor rotor resistance (max. factor 2!) to reduce the
magnetisation time in C00082.

Note!
During the starting action, a jerk may occur in the machine due to the
temporarily increased motor current!
5.7.4.2 Optimise speed controller
The speed controller is designed as a PI controller.
 In the Lenze setting, the configuration of the speed controller provides robustness and
moderate dynamics.
Parameter
C00070/1
C00071/1
166
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Info
SLVC: Vp speed controller
SLVC: Ti speed controller
L
C00019 = 0.
C00019 = 0.
Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
Lenze setting
Value Unit
15.00
100.0 ms