Siemens CU240S DP-F - Vector Control with Speed Encoder

Functions
8.24 Open-loop and closed-loop control
Control Units CU240S
8-174 Operating Instructions, 11/2006, A5E00766042B AA
8.24.2.2 Vector control with speed encoder
Data
P1400 … P1740 Parameter range:
P0400 … P0494
Warnings: -
Faults: -
Function chart number: FP7000
Description
For Vector control with speed encoder (VC), a pulse encoder, e.g. an encoder with 1024
pulses per revolution is required. In addition to the correct wiring, the pulse encoder must be
activated, corresponding to the encoder type, using the parameter range P0400 … P0494.
P0400 = 2
A
B
A
AN
B
BN
3DUDPHWHU 7HUPLQDO 7UDFN (QFRGHURXWSXW
VLQJOHHQGHG
GLIIHUHQWLDO
Figure 8-91 P0400 settings for a pulse encoder
Advantages of Vector control with encoder:
● The speed can be closed-loop controlled down to 0 Hz (i.e. at standstill)
● Stable control behavior over the complete speed range
● Constant torque in the rated speed range
● When compared to closed-loop speed control without encoder, the dynamic response for
motors with encoder is significantly higher as the speed is directly measured and is
incorporated in generating the model of current components i
d
, i
q
.