Single Load Sharing By Multiple Inverters (Droop Control) - Toshiba TOSVERT VF-AS3 Instruction Manual

6. 16 Single load sharing by multiple inverters
(droop control)
<F320: Droop gain>
<F321: Frequency at 0% droop gain>
<F322: Frequency at F320 droop gain>
<F323: Droop deadband torque>
<F324: Droop output filter>
■ Function
Droop control is a function that prevents loads from concentrating at a specific motor due to load
imbalance when multiple inverters and motors are used to drive a common load.
These parameters are used to allow the motor to slip (drooping characteristic) according to the load
torque current.
These parameters are used to adjust the frequency range, deadband torque, and gain.
■ Parameter setting
Title Parameter name
F320 Droop gain
F321 Frequency at 0% droop
gain
F322 Frequency at F320 droop
gain
F323 Droop deadband torque
F324 Droop output filter
*1 Range that can be changed during run is 0.1 - 100.0%. Setting or changing to 0.0 (no droop) must be performed after stop.
■ Setting methods
• Droop control is enabled when <Pt: V/f Pattern> is set to "3", "9", "10", or "11".
• When the applied torque is equal to or more than the deadband torque value, output frequency is
reduced during power running or increased during regeneration.
• Droop control is enabled at frequency range <F321: Frequency at 0% droop gain> or more.
• The amount of droop will vary depending on the output frequency for frequency ranges <F321:
Frequency at 0% droop gain> or more or <F322: Frequency at F320 droop gain> or less.
• For the frequency range over <vL: Base frequency 1>, the amount of error for <F323: Droop
deadband torque> will increase. Therefore, we recommend you use this parameter at base
frequency or less.
• Output frequency in droop control will not be limited by <FH: Maximum frequency>.
F320 : Droop gain
Min: 0.0
X1000
Adjustment range
*1
0.0 - 100.0
0.0 - 320.0
0.0 - 320.0
0 - 100
0.1 - 200.0
6-69
E6582062
STOP 0.0Hz
13:20
0.0
%
Max: 100.0
X100 X10 X1
Unit Default setting
% 0.0
Hz 10.0
Hz 100.0
% 10
rad/s 100.0
6. [Advanced] How to use parameters
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