Adjusting The Vector Control Speed Control Related Parameters; Speed Control System For Induction Motors; Vat2000 Speed Control System Block Diagram - GE VAT2000 Instruction Manual

6-7 Adjusting the vector control speed control related parameters

With the VAT2000, ASR operation is possible by executing automatic tuning and setting simple speed
control parameters. However, when carrying out high-response or high-accuracy control, the parameters
must be adjusted in detail. In this section, the configuration and adjustment parameters of the speed
control system is explained.

6-7-1 Speed control system for Induction Motors

The speed control system of VAT2000 is configured of blocks as shown below. Automatic tuning is used
for adjusting the exciting current control, current regulator, flux observer and speed estimation
mechanism, so these parameters often do not need to be adjusted. However, the parameters related to
the speed regulator, torque limit, load torque observer, various low path filters, etc., must be adjusted
according to the user's system. Thus, these cannot be simply adjusted with automatic tuning. The final
user of the system must adjust these parameters to match the system. Adjustments are carried out while
referring to the block diagram below.
A S R
P C o ntrol
G a in
S p ee d
S e tting
+
LP F
-
B 3 0-3
LP F
I C on trol
G a in
B 3 0-5
LP F
B 3 0-6
(Note) The related parameter Nos. are indicated in the above function blocks.
6. Control Functions and Parameter Settings
A 1 0-0 A 1 3-6
Torque
Lim iter
A 3 0-2 A 3 0-2
+ +
+ +
A 1 0-3
A 1 0-4
A 1 0-5
A 1 0-0 A 1 0-2
D istu rb an ce
O b se rv er
B 3 0-0 B 3 0-1
E xciter
C u rrent
C o ntrol
B 3 2-0 B 3 3-x
B 3 2-2 B 3 4-x
M o to r
S p ee d

VAT2000 speed control system block diagram

A C R
Torque
C u rrent
LP F
B 3 0-7
A 11-2
+
A 11-3
-
Torque
C o m m and
E stim ated
M o to r S pee d
S e ns orless
Ve ctor C o ntro l
LP F
Ve ctor C o ntro l
B 3 0-4
w ith se nsor
6-75
A 11-0 B 1 3-7
A 11-1 B 3 2-4
+
-
C u rrent
D e te ction
B 3 1-0
Flu x
O b se rv er
B 3 1-1
& Sp ee d
E stim atio n
B 3 1-2
M
P P
S p ee d
D e te ction
D e te cte d
M o to r S pee d