
—————— Instruction manual ——————
171
6.7.4 Droop function
-
+
low pass filter
Zero
T
To Speed
reference
From digital setting or
analog input
T current ref
Load comp
0 %
Droop limit
1500 rpm
Droop filter
0 ms
Droop gain
0 %
Enable droop
Figure 6.7.4.1: Droop compensation
SPEED REGULAT
Droop function
[696]
Droop gain [%]
[697]
Droop filter [ms]
[698]
Load comp [%]
[700]
Droop limit [FF]
[699]
Enable droop
Parameter description
No.
Value
Standard
Configuration
min
max
Factory
American
Factory
Standard
Droop gain [%]
696
0.00
100.00
0.00
0.00
Droop filter [ms]
697
0
1000
0
0
Load comp [%]
698
-200
+200
0
0
*
Droop limit [FF]
700
0
2*P45
1500
1500
**
Enable droop
Enabled (1)
Disabled (0)
699
0
1
Disabled (0)
Disabled (0)
* This parameter can be assigned to one of the programmable analog inputs.
**
This parameter can be assigned to one of the programmable digital inputs.
The Droop function is used when a current balancing between two drives is required. A typical situation is when
two motors are mechanically coupled and have to run at the same speed. If, because of a different characteristic
of the two speed regulators, one of the motors is driven to run at a higher speed, it will be overloaded and the
second motor will work as a brake. The Droop function permits to avoid this bad functioning by adding a com
-
ponent in the in the speed reference of the drive, which is proportional to the actual load difference of the drives.
The effect is the balancing of the two motor current.
Droop gain
Droop function gain. It is defined as a percentage of the ratio between
Speed base value
ant the difference
Load comp - T current ref
. This means that when the difference
Load
comp - T current ref
is 100% and
Droop gain
= 100%, the speed reference correction
signal is equal to
Speed base value
.
Droop filter
Filter time constant
Load comp
Load compensation signal. It is typically equal to the “master” drive current, but it can
also be assigned to a programmable analog output. It is defined as a percentage of Idn.
Enable droop
Enabled
Droop function enabled.
Disabled
Droop function disabled.
Droop limit
It defines the speed reference correction range in which the droop function is active.
The value to be entered is based on the factor function.
(For more detail see Figure 6.7.1 “Speed regulator”).
Summary of Contents for TPD32-EV-...-2B
Page 1: ... Instruction manual Industrial Application DC drives TPD32 EV ...
Page 372: ... TPD32 EV 372 9 BLOCK DIAGRAM 9 1 CONTROL BLOCK DIAGRAMS ...
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Page 501: ... Instruction manual 501 APPENDIX 3 ACCESSORIES A3 1 EAM Adapter Kit EAM1579 EAM1580 ...
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