Toshiba G7 Series Applications Workbook page 55

The droop at 100% motor torque when operating at and above the frequency programmed in F322 is
calculated using the formula:
Example: F322 = 60 Hz
F320 = 5
100% Droop @ F322 = F320 * (F322 * 0.01)
When operating between the frequencies programmed in F321 and F322, the droop at 100% motor
torque tapers from a max value at F322 to 0% at the frequency of F321. The actual value may be
calculated using the formula:
100% Droop (between F321 and F322) = (F322 * (F320 * 0.01)) * (CmdHz – F321/(F322 – F321))
Example: F322 = 60
F320 = 5
F321 = 30
CmdHz = 45
100% Droop (between F321 and F322) = (60 * (5 * 0.01)) * (45 – 30/(60 – 30))
F323 -- Drooping Insensitive Torque Range -- configures the lowest amount of motor torque on which
to apply droop by the application of an offset in the amount of F323. With F323 programmed for 0.0,
the percent droop matches the percent
torque based on the configuration of
parameters F230, 231, and 232.
F323 programmed for 50%, droop is not
calculated until the motor output torque
reaches 50% motor torque and is offset by
this amount throughout the range.
As shown in the chart to the right, the
drooping insensitive band is in effect for
both positive torque and negative torque.
For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-2192
efesotomasyon.com -Toshiba inverter,drive,servo,plc
100%Droop @ F322 = F320 * (F322 * 0.01)
= 5 * (60 * 0.01)
= 5 * 0.6
= 3 Hz
= (3) * (15/30)
= 1.5Hz
With
F323 = 0%
63 -100% Torque
62
-50% Torque
61
60 0% Torque
59
50% Torque
58
100% Torque
57
F323 = 50%
63 -150% Torque
62
-100% Torque
61
60 +/- 50% Torque
59
100% Torque
58
150% Torque
57
55