Menu 4
Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
102
Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
The operating area is shown in the following diagram:
Example of uncoiler operation:
This is an example for an uncoiler operating in the positive direction. The final speed demand should be set to a level just above the maximum normal
speed. When the resultant torque demand is negative the uncoiler will apply tension and try and rotate at 5rpm in reverse, and so take up any slack.
The uncoiler can operate at any positive speed applying tension. If it is necessary to accelerate the uncoiler a positive resultant torque demand is
used. The speed will be limited to the final speed demand. The operating area is the same as that for the coiler and is shown below:
4: Speed control with torque feed-forward
The drive operates under speed control, but a torque value may be added to the output of the speed controller. This can be used to improve the
regulation of systems where the speed loop gains need to be low for stability.
A first order filter, with a time constant defined by this parameter, is provided on the current demand to reduce acoustic noise and vibration produced
as a result of position feedback quantisation noise. The filter introduces a lag in the speed loop, and so the speed loop gains may need to be reduced
to maintain stability as the filter time constant is increased. Alternative time constants can be selected depending on the value of the speed controller
gain selector (Pr
3.16
). If Pr
3.16
= 0 Pr
4.12
is used, if Pr
3.16
= 1 Pr
4.23
is used.
4.12
Current demand filter 1
Drive modes
Closed-loop vector, Servo
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU
PS
1
1
1
1
Range
Closed-loop vector, Servo
0.0 to 25.0 ms
Default
Closed-loop vector, Servo
0.0
Update rate
Background read
4.13
Current controller Kp gain
Drive modes
Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit
SP
FI
DE Txt VM DP
ND
RA NC NV
PT
US RW BU
PS
1
1
1
Range
Open-loop, Closed-loop vector, Servo,
Regen
0 to 30,000
Default
Drive voltage rating:
Open-loop,
Closed-loop vector, Servo
Regen
200V 400V 575V 690V
20 20 20 20
75 150 180 215
45 90 110 130
Closed-loop vector, Servo
Pr
21.22
Update rate
Background read
Final speed
demand
Area for coiler operation, speed
limited to ref and positve torque
Area for decelerating the coiler, reverse
speed limited and negative torque
-5rpm
Speed
Torque
-5rpm
Area for normal uncoiler
operation: negative torque,
limited to low speed in reverse
Speed reference
Area for accelerating
uncoiler: positive torque,
limited speed
Speed
Torque
Содержание unidrive sp
Страница 419: ......
Страница 420: ...0471 0002 10 ...