E6581442
F-28
6
[Parameter setting]
Title
Function
Adjustment range
Default setting
Drooping gain [Note]
~
%
Speed at drooping gain 0%
~
Hz
Speed at drooping gain
~
Hz
Drooping insensitive torque
~
%
Drooping output filter
~
rad/s
Note: Drooping gain can be changed within a range of 0.1 to 100.0% during operation. When changing the setting
to 0.0 (no drooping) or 0.0, stop operation.
• Drooping control can be performed only when
is set to
,
,
or
.
• When torque over the insensitive torque is applied, the frequency is decreased (during power running) or
increased (during regenerative braking).
• The drooping function is operative at frequencies over the frequency set with
.
• In the frequency range between the frequencies set with
and
, the degree of drooping changes
according to the magnitude of frequency.
• The error in drooping insensitive torque increases in the frequency range above the base frequency, and it is
therefore recommended that these functions be used at frequencies below the base frequency.
• During drooping control, the output frequency is not restricted by the maximum frequency (
).
The change in frequency at the time of drooping can be calculated, as described below:
a) Gain by internal torque reference (Gain1)
If internal torque reference (%)
≧
0
Gain1 = (internal torque reference - dead band
) / 100
Gain1 needs to be set at 0 or a positive number.
If internal torque reference (%) < 0
Gain1 = (internal torque ref dead band
) / 100
Gain1 needs to be set at 0 or a negative number.
b) Gain by frequency after acceleration (Gain2)
If
<
| Frequency after acceleration |
Frequency 1 set with
Gain2 = 0
| Frequency after acceleration | > Frequency 2 set with
Gain2 = Drooping gain
/ 100
If frequency 1
< | Frequency after acceleration |
Frequency 2
If
≧
| Frequency after acceleration |
Frequency 1 set with
Gain2 = 0
If | Frequency after acceleration | > Frequency 1
Gain2 = Drooping gain
/ 100
c) Drooping speed
Drooping speed = base frequency
Note
× Gain1 × Gain2
Note: If the base frequency exceeds 100 Hz, count it as 100 Hz.
Gain2 =
×
(| Frequency after acceleration | – Frequency 1
)
(Frequency 2
– Frequency 1
)
Drooping gain
100
Содержание TOSVERT VF-AS1 Series
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Страница 261: ...E6581442 J 13 10 VFAS1 4200KPC 4280KPC VFAS1 4355KPC 4400KPC 4500KPC ...
Страница 321: ...E6581442 M 3 13 Continued overleaf ...