B7: Droop Control (Clv, Clv/Pm) - YASKAWA U1000 Technical Manual

n b6-01, b6-02: Dwell Reference, Dwell Time at Start
Parameter b6-01 determines the frequency that is held for the time set in b6-02 during acceleration.
No.
b6-01
b6-02
n
b6-03, b6-04: Dwell Reference, Dwell Time at Stop
Parameter b6-03 determines the frequency that is held for the time set in b6-04 during deceleration.
No.
b6-03
b6-04
u

b7: Droop Control (CLV, CLV/PM)

Droop control automatically balances the load level between two motors driving the same load. Droop control must be activated
in one of the drives controlling these motors. The drive in which Droop control is activated shifts the load from one motor to
another by automatically reducing the speed when the torque reference rises, and automatically increasing the speed when the
torque reference falls.
Note: Disable Feed Forward (n5-01 = 0) whenever using Droop control.
Motor A runs faster than B, pulling more load
A
= 100% Load
B
= 80% Load
Droop Control increases the speed reference in
drive B accomplishing load balance
n b7-01: Droop Control Gain
Sets the amount of speed reduction when the torque reference is 100%. The gain is set as a percentage of the maximum output
frequency. A setting of 0.0% disables the Droop control function.
No.
b7-01
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
OFF
Run Command
Output Frequency
b6-02
Figure 5.27 Dwell Function at Start and Stop
Name
Dwell Reference at Start
Dwell Time at Start
Name
Dwell Reference at Stop
Dwell Time at Stop
A
= 90% Load
f = constant
ref_A
f increase
ref_B
B
= 90% Load
Figure 5.28 Droop Control Application
Parameter Name
Droop Control Gain
OFF
ON
b6-01
b6-03
b6-04
Setting Range
0.0 to 400.0 Hz
0.0 to 10.0 s
Setting Range
0.0 to 400.0 Hz
0.0 to 10.0 s
Motor B runs faster than A, pulling more load
A
= 80% Load
f = constant
ref_A
f decrease
ref_B
B
= 100% Load
Droop Control decreases the speed reference in
drive B accomplishing load balance
Setting Range
0.0 to 100.0%
5.2 b: Application
Default
0.0 Hz
0.0 s
Default
0.0 Hz
0.0 s
A
= 90% Load
B
= 90% Load
Default
0.0%
5
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