Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011 L 167
8400 StateLine C | Reference manual
Motor control (MCTRL)
Sensorless vector control (SLVC)
Speed controller gain Vp
The gain Vp (C00070/1
) of the speed controller is defined in a scaled representation which
enables a comparable parameterisation almost independent of the power of the motor or
inverter. Here, the speed input difference of the controller is scaled to the rated motor
speed whereas the output torque refers to the rated motor torque. A gain of 10 means that
a speed difference of 1 % is gained through the P component with 10 % torque.
If the rated data of the motor and the mass inertia of the drive system are known, we
recommend the following setting:
[5-10] Recommendation for the setting of the gain of the speed controller
Tip!
Values recommended by Lenze for the setting of the (proportional) gain:
• For drive systems without feedback: Vp = 6 … 25
• For drive systems with a good disturbance behaviour: Vp > 15
In this case, we recommend the optimisation of the dynamic performance of
the torque controller.
Speed controller reset time Ti
Apart from setting the P component, C00071/1
provides the possibility to take influence
on the I component of the PI controller.
Tip!
Value range recommended by Lenze for the setting of the reset time:
Ti = 20 ms … 150 ms
V
P
= Gain of the speed controller (C00070/1)
T
M
= Time constant for the acceleration of the motor
M
N
= Rated motor torque
n
N
= Rated motor speed
J
drive, total
= Total moment of inertia of the drive
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