Toshiba TOSVERT VF-AS3 - Page 312

E6582062
6. [Advanced] How to use parameters 6-70
4
4
6
9
■ Calculating formula
The amount of output frequency adjusted by droop control can be calculated with the following
formula.
1) Gain based on internal torque command (Gain 1)
• When internal torque command (%) >= 0,
Gain 1 = (load torque - <F323>)/100
Note that 0 (zero) or a positive number must be set to Gain 1.
• When internal torque command (%) < 0,
Gain 1 = (load torque + <F323>)/100
Note that 0 (zero) or a negative number must be set to Gain 1.
2) Gain based on frequency after acceleration (Gain 2)
• When <F321> < <F322>
When |frequency after acceleration| <= <F321>,
Gain 2 = 0
When |frequency after acceleration| > <F322>,
Gain 2 = <F320>/100
When <F321> < |frequency after acceleration| <= <F322>,
Gain 2 = (<F320>/100) x ((|frequency after acceleration| - <F321>)/(<F322> - <F321>))
• When <F321> >= <F322>
When |frequency after acceleration| <= <F321>,
Gain 2 = 0
When |frequency after acceleration| > <F321>,
Gain 2 = <F320>/100
Droop gain
load torque
Droop gain
Frequency
Dead band torque
Dead band frequency
Gain 1
Gain 2
<F322>
<F322>
<F323>
<F321>
<F321>
<F320>
<F320>
<F323>